One of the tools used by environmentalists,
|
|
- Derek Tyler
- 6 years ago
- Views:
Transcription
1 CALCULATING A DAILY NORMAL TEMPERATURE RANGE THAT REFLECTS DAILY TEMPERATURE VARIABILITY BY CHRISTOPHER HOLDER, RYAN BOYLES, PETER ROBINSON, SETHU RAMAN, AND GREG FISHEL By utilizing daily normal ranges, weathercasters and others could better communicate to the public the natural expected variability of day-to-day temperatures a variability not suggested by normals derived from smoothed trend lines. One of the tools used by environmentalists, meteorologists, and the media to gauge phenomena such as global or local warming or cooling trends is a particular area's normal temperature, produced by the National Climatic Data Center (NCDC). After quality control algorithms are run, the monthly normal temperatures are calculated as simple 30-yr monthly averages. Daily normals are AFFILIATIONS: HOLDER, BOYLES, ROBINSON, AND RAMAN State Climate Office of North Carolina, North Carolina State University, Raleigh, North Carolina; FISHEL WRAL-TV5, Raleigh, North Carolina CORRESPONDING AUTHOR: Sethu Raman, State Climate Office of North Carolina, North Carolina State University, Raleigh, NC sethu_raman@ncsu.edu The abstract for this article can be found in this issue, following the table of contents. DOI: /BAMS In final form 10 January American Meteorological Society then derived from the monthly normals using a cubicspline interpolation, a process that produces a smooth data curve (NCDC 2004). The final product, called "daily normal temperature," is a statistically sound number that can be used to examine day-to-day temperature trends. One drawback of climatological averages such as this lies in the fact that they are merely averages of extremes. Daily and weekly temperature variations can be dramatic, and rarely do temperature observations in most locations follow a smooth, steady trend for a significant period of time. Nearly every day will either be some amount cooler or warmer than this normal temperature, leading to impulsive conclusions that, for example, global warming is having an effect and that our weather is becoming more erratic. Most people do not take into account the day-to-day variability that is especially inherent in temperature. Thus, comparing any particular day's temperature observations with this normal temperature, as occurs often in media such as local news and weather broadcasts, can be misleading to many and lead to the following fundamental question: if we are so often AMERICAN METEOROLOGICAL SOCIETY JUNE 2006 BAFft 769
2 below or above normal, what, exactly, is "normal" (Lupo et al. 2003)? Therefore, giving the public a normal range of temperature for a particular date a span of temperatures that is derived from past observations and reflects day-to-day temperature variance may be more meaningful. The statistical techniques used to calculate this range are outlined in the "Procedure" section, results are presented in the "Observations" section, and final thoughts are presented in the "Conclusions" section. P R O C E D U R E. This study focuses on the 30-yr period from 1971 to 2000 at six locations that span North Carolina Raleigh-Durham, Charlotte, and Greensboro in the Piedmont; Asheville in the mountain region; Fayetteville in the coastal plain; and Wilmington on the coast. The 30-yr daily normal temperatures are calculated by the NCDC, and the actual daily temperatures for the various locations are obtained from NCDC (NCDC 2004). The standard deviation (a), which is the square root of the variance and gives a good indication of how much a particular parameter tends to vary across a dataset, is calculated for maximum temperature () and minimum temperature () on each calendar day (each 1 January, 2 January, etc.). To make this statistic more useful, however, a measure of probability can be derived from various multiples of o above and below the average if the o dataset is normally distributed, which is a statistical property of a dataset commonly called a bell curve because of its bell shape, or a Gaussian distribution. Other studies have found that the temperature data either 1) have a Gaussian distribution or 2) are close enough to Gaussian that the departures from the Gaussian curve are small enough to allow for an assumption of Gaussian distribution (Bingham 1961; Bruhn et al. 1980; Lupo et al. 2003). Here, the temperature variances are assumed to follow a bell curve. With that condition, one o above and below the mean, for example, contains about 68% of the dataset; that is, 68% of the 1 January maximum temperature values from the past 30 yr lie between (mean - a) and (mean + o). These areas can be determined using a z table, a basic tool found in most statistics textbooks or online. Here, ( a), henceforth called "our calculation," is used because it provides a 50% area. One can then say that, for example, 50% of the 1 January maximum temperatures in the last 30 yr fell within a particular range of values. The percentage choice is rather arbitrary. A higher percentage may be desirable at face value, but it would 770 I BATIS- JUNE 2006 require a larger range in temperature variability. The endpoints of the area under the curve must move further from the mean to encompass more data and provide a higher percentage. Eventually the reasonability of the size of the temperature range is sacrificed for a higher probability. This study uses 50% as a reference value to provide a probability that is understandable and intuitive to the common public user, but does not provide a temperature range that is so large that it loses value and significance. Other locations, such as the Midwest, may find that a smaller percentage is necessary because of a larger temperature range, but it is not clear at this point if doing so will create undesired uniformity issues regarding the definition and understandability of "range" from location to location. Given that the public seems comfortable with the usage of the normal temperature, this study uses the normal temperature, rather than the raw 30-yr daily average, as the mean of the distribution. Thus, our calculation is added to and subtracted from the NCDC daily normal temperature at the six locations in this study. OBSERVATIONS. The size of the ranges provided by these calculations seems reasonable (see Figs. 1,2) and helps to represent temperature variability inherent in a certain time of year. Graphs of our calculation for and of the 365 days of the year indeed show that temperature spreads tend to vary by season (Fig. la shows that of Raleigh-Durham). On average, winter varies about 4 times as much as summer, and winter varies about 5 times as much as summer (Table 1). The average largest 50% probability spread for among the six stations is 5.3 C. For the 10 days that have the largest spread, the median date is 8 February (Table 1). For, the average largest spread is 4.9 C and the 10-day median is 9 January. The smallest () spread is 1.4 C ( C), with a 10-day median of 5 August (26 July). The larger variance in winter is expected and can be attributed to the more dynamic weather systems and atmospheric flows that exist in the cooler months, when a greater latitudinal temperature gradient exists. Eleven-day moving-average trend lines reduce the magnitude of the daily temperature variations to better visualize how the time series of our calculations vary between and. The time period of eleven days is used because it is large enough to significantly reduce the magnitude of daily variance, while being small enough to capture significant trend changes on a small time scale. Ten days is not used because
3 even numbers are not symmetrical about a central point. With this smoother trend line, is more easily seen to vary more than throughout the year, except for the August- October period and for a portion of May, when the opposite is true. This pattern of versus is seen at all stations except for Wilmington, which shows more intertwining throughout the year (Fig. lb). At Wilmington, land-sea interactions add more complexity to the temperature variance signal. Basic issues, such as clear versus cloudy, moist versus dry, windy versus calm, etc., are key to values of and and are often directly related to topography, season, land usage, and geography. The lower limit of is governed, in part, by the dewpoint temperature. Dewpoint tends to vary less day to day than does, whose upper limit tends to be partially dictated by amount of sunshine, which is itself highly variant. During autumn, however, North Carolina tends to receive less rainfall, and clear skies are more dominant. With a tendency toward fewer clouds, tends to vary less and radiational cooling can be a prominent player in nighttime temperatures. However, wind is also a factor in the magnitude of radiational cooling, and winds and mesoscale systems tend to be highly variant in the spring and autumn months, which are times of transition. The on clear, calm nights can also vary significantly due to local topography and soil type, among other things. On a smaller time scale, there are significant dayto-day deviations in the time series of our calculation, as shown in Figs. la-b. Some daily perturbations are expected, but those calculated in this study are larger FIG. I. (a) Eleven-day running averages of the standard deviations ( F) of (red) and (blue) for Raleigh-Durham. Note the decrease in variance in warmer months, and that is more varied than at all times except autumn, (b) Same as (a), but for Wilmington. Note the intertwining of the graph lines, which is unique to Wilmington in this study. This is probably due to the complex land-sea interactions experienced at the coast. than anticipated. At certain times of the year, the signal of our calculation follows a nearly sinusoidal pattern. These daily fluctuations in the range may at face value confuse some people why, for example, is today's range 7 F when yesterday's was 5 F (degrees Fahrenheit is often used in presenting temperature data to the American public)? For example, Table 2 shows the and normal ranges at Greensboro for 1-10 January. Note that the range changes as much as 4.4 F from one day to the next, and the largest day-to-day difference in the normal range is 4.8 F for these 10 days. This variance markedly contrasts with the rather steady AMERICAN METEOROLOGICAL SOCIETY JUNE 2006 BAflS- I 771
4 (e.g., Lupo et al. 2003), but capturing observed daily variability is central to this study. Smoothing, such as through cubic splines and weighted or nonweighted moving averages, would minimize day-to-day variance in favor of reducing what appears to be noise in the signal of temperature variability. Given that the ranges are calculated from actual daily observations, these "noisy" features indeed represent daily temperature variability. As such, these data are not smoothed. This may warrant additional explanation by those, such as broadcast meteorologists, who may utilize these normal ranges. The amount of clarification that these users provide may vary depending on the audience and how in depth the users wish to go in explaining the product. One example of how the normal ranges could FIG. 2. Graph of N C D C - n o r m a l i z e d T m a x and T m i n for Raleigh-Durham, along be graphically presented w i t h t h e upper and lower limits of t h e T m a x and T m i n ranges, calculated by to the public is shown in ( x standard deviation) and added t o and subtracted f r o m t h e n o r m a l Fig. 3. One thermometer temperature. NCDC normal and data, which are also shown in Table 2. The variance in the normal and ranges as compared to the normal temperature curves can also be seen graphically in Fig. 2. Some precedent does exist for smoothing these raw data to reduce the magnitude of day-to-day variation. This smoothing would provide curves of our calculations that are as "clean" as the NCDC normal curves 1. M a x i m u m and m i n i m u m ranges of T m a x and T m i n ( F ) at t h e six locations in this study, and t h e corresponding m e d i a n day of t h e 10 largest and smallest T m a x and T m i n ranges. TABLE ( a ) m a x range ( a ) m a x range m e d i a n date m i n range m i n range m e d i a n date M a x range/ min range Asheville 30 Jan Aug 3.9 Charlotte 4 Feb Aug 3.7 Fayetteville Feb Jul Station Greensboro 5.5 II Feb 1.5 Raleigh-Durham Feb Aug 3.7 Wilmington 26 Jan Aug Feb Aug ( <x) m a x range m a x range m e d i a n date m i n range m i n range m e d i a n date Asheville 4.9 II Jan Jul 6.1 Charlotte Jan 1 Aug Fayetteville Dec 5.0 Greensboro Jan 5.4 Raleigh-Durham 19 Jan 1.0 Wilmington 3 Jan Jul Average Jan 26 Jul 5.3 Average Station I BATIS- JUNE 2006 M a x range/ m i n range
5 2. N C D C - n o r m a l i z e d T m a x and T m i n ( F ) for t h e first 10 days of January at Greensboro, along w i t h the upper and lower limits of T m a x and T m i n ranges, calculated by ( * standard deviation), and added to and subtracted f r o m t h e n o r m a l t e m p e r a t u r e. TABLE Day range Upper normal Lower range Upper normal Lower 1 Jan Jan Jan Jan Jan Jan Jan Jan II Jan Jan represents, while the second represents. The numbers to the left of the thermometers are the actual and for the day, while the numbers on the right are the normal ranges and historical record high (low) () for that day. A basic animation was rendered for this graphic, where the "mercury" rises to the actual temperatures, whose numbers then appear. Then, the numbers for the normal ranges, and finally the historical extremes, appear. A script could be written to make this graphic easy to utilize day to day make the mercury rise to a particular location, and place the normal ranges and extremes in appropriate relative locations along the mercury tube. C O N C L U S I O N S. With environmental issues often at the forefront of global politics, a need always exists for those involved with meteorology, climatology, and environmentalism to develop and utilize the most accurate data possible in the most accurate way possible. When comparing temperature records, three incorporating factors generally exist: what the temperature is, what it has been, and, if pertinent, what it will be. The "has beens," or the past records, are how we gauge where we are today climatologically. The use of 30-yr normal temperatures as comparisons to current weekly (or monthly, seasonaly, etc.) temperatures is arguably a very valid technique. But, as a comparison to daily observed temperatures, which broadcast meteorologists often utilize, the normal temperatures can be misleading. This study shows, and casual experience undoubtedly suggests, that variance in day-to-day temperatures is often large, especially in cooler months. This variance is AMERICAN METEOROLOGICAL SOCIETY 15.3 FIG. 3. A n e x a m p l e of how t h e n o r m a l t e m p e r a t u r e ranges could be presented on-air. It is a n i m a t e d such t h a t the m e r c u r y rises to the actual t e m p e r a t u r e s (75 and 47 F), t h e n t h e n o r m a l ranges ( 7 l - 7 9, F ) a p p e a r, and finally t h e r e c o r d t e m p e r a t u r e s ( 9 5 and 29 F) are shown. A good script would m a k e this graphic easy to utilize in day-to-day broadcasts. not shown with 30-yr daily normal temperatures, and to present this normal temperature as "where we usually are this time of year" or "where we should be" often gives the public the wrong impression of current weather as compared to past weather. Presenting the public with a 30-yr normal range of temperatures gives a more accurate and representative idea of what the temperatures usually are like at any particular time of the year. The results of this study show the expected increase variance in cooler months, and a higher variance with than for most of the year. However, with temperature ranges sometimes as high as 5.5 C (9.9 F), JUNE 2006 BAflS- I 7 7 3
6 and varying somewhat from one day to the next, the normal ranges may give the impression of inaccuracy. It is therefore important to ensure that the function of this range be made clear, or to use a smaller normal probability. A smaller probability would create a smaller temperature range and reduce the magnitude of daily variability in the ranges. This study uses 50%, as a reference value, but using a probability of less than 50% may significantly reduce the usability and clarity of this technique. A fine line is present here between the range's viability in the public, its statistical significance, and its scientific value. Other statistical techniques could be performed to come up with a normal range. Because of its simplicity, and because it is applied to six separate locations, the process presented here is easily applicable to any location with an uninterrupted, quality-controlled dataset and with a near-normal distribution of daily temperature variance. An informal survey was performed as part of Lupo et al. (2003), a study that also addresses the question of "what is normal?" When presented with that study's graphical representations of its calculations of temperature variability, 65.4% of the 292 people surveyed found the presentation to be easy or somewhat easy to understand. Thus, it is possible to present this type of product so that a majority of people understand it. Further tests could be performed to minimize the transition from the normal temperature currently utilized. A C K N O W L E D G M E N T S. This study was supported by the State Climate Office of North Carolina and WRALTV5. REFERENCES Bingham, C., 1961: Distributions of weekly averages of diurnal temperature means and ranges about harmonic curves. Mon. Wea. Rev., 89, Bruhn, J. A., W. E. Fry, and G. W. Fick, 1980: Simulation of daily weather data using theoretical probability distributions. /. Appl. Meteor., 19, Lupo, A. R., and Coauthors, 2003: The presentation of temperature information in television broadcasts: What is normal? Nat. Wea. Digest, 27, NCDC, cited 2004: Daily station normals. Climatology of the U.S. No. 84. [Available online at noaa.gov/.] Railroads and Weather From Fogs to Floods and Heat to Hurricanes, the Impacts of Weather and Climate on American Railroading More than 120 photographs arid charts Railroads The most damaging storms of the last century Railroad response to Katrina From Fog* to Floods and Heal to Hurricanes, t h e ^ ^ ^ J <>F Weather and Cfimate on American Railroading "Railroads and Weather is a must-read for meteorologists wanting to understand the impact of their products on the rail community...as well as railroad operations personnel, and history buffs who just love trains." Richard A. Wagoner, National Center for Atmospheric Research Stanley Changnon Order from the A M S Today By Stanley A. Changnon pp, hardbound, AMS order code: Rirds $24.95 member, $29.95 non-member ISBN 10: X Call (617) , ext. 209 or 258, or amsorder@ametsoc.org. Send pre-paid orders to the American Meteorological Society: AMS Order Dept., 45 Beacon Street, Boston, ISBN 13: I BATIS- JUNE M A
Weather Systems Study Guide:
Weather Systems Study Guide: 1. Draw a diagram of Earth s water cycle and label each part. 2. Explain how the water cycle works. 3. What happens in the troposphere and stratosphere? Atmosphere Level What
More informationChampaign-Urbana 1999 Annual Weather Summary
Champaign-Urbana 1999 Annual Weather Summary ILLINOIS STATE WATER SURVEY 2204 Griffith Dr. Champaign, IL 61820 wxobsrvr@sws.uiuc.edu Maria Peters, Weather Observer A major snowstorm kicked off the new
More informationChanging Hydrology under a Changing Climate for a Coastal Plain Watershed
Changing Hydrology under a Changing Climate for a Coastal Plain Watershed David Bosch USDA-ARS, Tifton, GA Jeff Arnold ARS Temple, TX and Peter Allen Baylor University, TX SEWRU Objectives 1. Project changes
More informationThe Climate of Payne County
The Climate of Payne County Payne County is part of the Central Great Plains in the west, encompassing some of the best agricultural land in Oklahoma. Payne County is also part of the Crosstimbers in the
More informationAgricultural Outlook Forum Presented: February 17, 2006 THE SCIENCE BEHIND THE ATLANTIC HURRICANES AND SEASONAL PREDICTIONS
Agricultural Outlook Forum Presented: February 17, 2006 THE SCIENCE BEHIND THE ATLANTIC HURRICANES AND SEASONAL PREDICTIONS Gerald Bell Meteorologist, National Centers for Environmental Prediction NOAA,
More informationMonthly Long Range Weather Commentary Issued: February 15, 2015 Steven A. Root, CCM, President/CEO
Monthly Long Range Weather Commentary Issued: February 15, 2015 Steven A. Root, CCM, President/CEO sroot@weatherbank.com JANUARY 2015 Climate Highlights The Month in Review During January, the average
More informationThird Grade Math and Science DBQ Weather and Climate/Representing and Interpreting Charts and Data - Teacher s Guide
Third Grade Math and Science DBQ Weather and Climate/Representing and Interpreting Charts and Data - Teacher s Guide A document based question (DBQ) is an authentic assessment where students interact with
More information5B.1 DEVELOPING A REFERENCE CROP EVAPOTRANSPIRATION CLIMATOLOGY FOR THE SOUTHEASTERN UNITED STATES USING THE FAO PENMAN-MONTEITH ESTIMATION TECHNIQUE
DEVELOPING A REFERENCE CROP EVAPOTRANSPIRATION CLIMATOLOGY FOR THE SOUTHEASTERN UNITED STATES USING THE FAO PENMAN-MONTEITH ESTIMATION TECHNIQUE Heather A. Dinon*, Ryan P. Boyles, and Gail G. Wilkerson
More information138 ANALYSIS OF FREEZING RAIN PATTERNS IN THE SOUTH CENTRAL UNITED STATES: Jessica Blunden* STG, Inc., Asheville, North Carolina
138 ANALYSIS OF FREEZING RAIN PATTERNS IN THE SOUTH CENTRAL UNITED STATES: 1979 2009 Jessica Blunden* STG, Inc., Asheville, North Carolina Derek S. Arndt NOAA National Climatic Data Center, Asheville,
More informationThe Climate of Grady County
The Climate of Grady County Grady County is part of the Central Great Plains, encompassing some of the best agricultural land in Oklahoma. Average annual precipitation ranges from about 33 inches in northern
More informationDescription of the Temperature Observation and Averaging Methods Used at the Blue Hill Meteorological Observatory
Description of the Temperature Observation and Averaging Methods Used at the Blue Hill Meteorological Observatory Michael J. Iacono Blue Hill Meteorological Observatory November 2015 The Blue Hill Meteorological
More informationThe Climate of Kiowa County
The Climate of Kiowa County Kiowa County is part of the Central Great Plains, encompassing some of the best agricultural land in Oklahoma. Average annual precipitation ranges from about 24 inches in northwestern
More informationThe Climate of Marshall County
The Climate of Marshall County Marshall County is part of the Crosstimbers. This region is a transition region from the Central Great Plains to the more irregular terrain of southeastern Oklahoma. Average
More informationChampaign-Urbana 2000 Annual Weather Summary
Champaign-Urbana 2000 Annual Weather Summary ILLINOIS STATE WATER SURVEY 2204 Griffith Dr. Champaign, IL 61820 wxobsrvr@sws.uiuc.edu Maria Peters, Weather Observer January: January started on a mild note,
More information2011 Year in Review TORNADOES
2011 Year in Review The year 2011 had weather events that will be remembered for a long time. Two significant tornado outbreaks in April, widespread damage and power outages from Hurricane Irene in August
More informationColorado s 2003 Moisture Outlook
Colorado s 2003 Moisture Outlook Nolan Doesken and Roger Pielke, Sr. Colorado Climate Center Prepared by Tara Green and Odie Bliss http://climate.atmos.colostate.edu How we got into this drought! Fort
More informationMonthly Long Range Weather Commentary Issued: APRIL 18, 2017 Steven A. Root, CCM, Chief Analytics Officer, Sr. VP,
Monthly Long Range Weather Commentary Issued: APRIL 18, 2017 Steven A. Root, CCM, Chief Analytics Officer, Sr. VP, sroot@weatherbank.com MARCH 2017 Climate Highlights The Month in Review The average contiguous
More informationDrought in Southeast Colorado
Drought in Southeast Colorado Nolan Doesken and Roger Pielke, Sr. Colorado Climate Center Prepared by Tara Green and Odie Bliss http://climate.atmos.colostate.edu 1 Historical Perspective on Drought Tourism
More informationThe Climate of Pontotoc County
The Climate of Pontotoc County Pontotoc County is part of the Crosstimbers. This region is a transition region from the Central Great Plains to the more irregular terrain of southeast Oklahoma. Average
More informationJOURNAL OF INTERNATIONAL ACADEMIC RESEARCH FOR MULTIDISCIPLINARY Impact Factor 1.393, ISSN: , Volume 2, Issue 4, May 2014
Impact Factor 1.393, ISSN: 3583, Volume, Issue 4, May 14 A STUDY OF INVERSIONS AND ISOTHERMALS OF AIR POLLUTION DISPERSION DR.V.LAKSHMANARAO DR. K. SAI LAKSHMI P. SATISH Assistant Professor(c), Dept. of
More informationWeather Practice. 4. As wind velocity decreases, the distance between isobars on a weather map will A) decrease B) increase C) remain the same
1. The chart below shows the air temperature and the dewpoint temperature near the ground at a given location for four consecutive days. All temperatures were recorded at noon. Which statement is best
More informationMonthly Long Range Weather Commentary Issued: NOVEMBER 16, 2015 Steven A. Root, CCM, Chief Analytics Officer, Sr. VP, sales
Monthly Long Range Weather Commentary Issued: NOVEMBER 16, 2015 Steven A. Root, CCM, Chief Analytics Officer, Sr. VP, sales sroot@weatherbank.com OCTOBER 2015 Climate Highlights The Month in Review The
More informationMeteorology. Circle the letter that corresponds to the correct answer
Chapter 3 Worksheet 1 Meteorology Name: Circle the letter that corresponds to the correct answer 1) If the maximum temperature for a particular day is 26 C and the minimum temperature is 14 C, the daily
More informationClimate. Annual Temperature (Last 30 Years) January Temperature. July Temperature. Average Precipitation (Last 30 Years)
Climate Annual Temperature (Last 30 Years) Average Annual High Temp. (F)70, (C)21 Average Annual Low Temp. (F)43, (C)6 January Temperature Average January High Temp. (F)48, (C)9 Average January Low Temp.
More informationA summary of the weather year based on data from the Zumwalt weather station
ZUMWALT PRAIRIE WEATHER 2016 A summary of the weather year based on data from the Zumwalt weather station Figure 1. An unusual summer storm on July 10, 2016 brought the second-largest precipitation day
More informationThe Climate of Bryan County
The Climate of Bryan County Bryan County is part of the Crosstimbers throughout most of the county. The extreme eastern portions of Bryan County are part of the Cypress Swamp and Forest. Average annual
More informationThe Climate of Texas County
The Climate of Texas County Texas County is part of the Western High Plains in the north and west and the Southwestern Tablelands in the east. The Western High Plains are characterized by abundant cropland
More informationLocal Ctimatotogical Data Summary White Hall, Illinois
SWS Miscellaneous Publication 98-5 STATE OF ILLINOIS DEPARTMENT OF ENERGY AND NATURAL RESOURCES Local Ctimatotogical Data Summary White Hall, Illinois 1901-1990 by Audrey A. Bryan and Wayne Armstrong Illinois
More informationThe Climate of Murray County
The Climate of Murray County Murray County is part of the Crosstimbers. This region is a transition between prairies and the mountains of southeastern Oklahoma. Average annual precipitation ranges from
More informationP1.34 MULTISEASONALVALIDATION OF GOES-BASED INSOLATION ESTIMATES. Jason A. Otkin*, Martha C. Anderson*, and John R. Mecikalski #
P1.34 MULTISEASONALVALIDATION OF GOES-BASED INSOLATION ESTIMATES Jason A. Otkin*, Martha C. Anderson*, and John R. Mecikalski # *Cooperative Institute for Meteorological Satellite Studies, University of
More informationWeather and Climate of the Rogue Valley By Gregory V. Jones, Ph.D., Southern Oregon University
Weather and Climate of the Rogue Valley By Gregory V. Jones, Ph.D., Southern Oregon University The Rogue Valley region is one of many intermountain valley areas along the west coast of the United States.
More informationNatural Disasters and Storms in Philadelphia. What is a storm? When cold, dry air meets warm, moist (wet) air, there is a storm.
Natural Disasters and Storms in Philadelphia 1. What is a natural disaster? 2. Does Philadelphia have many natural disasters? o Nature (noun) everything in the world not made No. Philadelphia does not
More informationSeasonal Variations of the Urban Heat Island Effect:
Seasonal Variations of the Urban Heat Island Effect: Examining the Differences in Temperature Between the City of Philadelphia and its Outlying Suburbs By: Frank Vecchio 1 P a g e We re calling for a high
More informationThird Grade Math and Science DBQ Weather and Climate/Representing and Interpreting Charts and Data
Third Grade Math and Science DBQ Weather and Climate/Representing and Interpreting Charts and Data A document based question (DBQ) is an authentic assessment where students interact with content related
More informationROLE OF CLOUD RADIATION INTERACTION IN THE DIURNAL VARIATION OF PRECIPITATION
ROLE OF CLOUD RADIATION INTERACTION IN THE DIURNAL VARIATION OF PRECIPITATION SETHU RAMAN AND ADRIENNE WOOTTEN DEPARTMENT OF MARINE, EARTH AND ATMOSPHERIC SCIENCES NORTH CAROLINA STATE UNIVERSITY, RALEIGH,
More informationChampaign-Urbana 2001 Annual Weather Summary
Champaign-Urbana 2001 Annual Weather Summary ILLINOIS STATE WATER SURVEY 2204 Griffith Dr. Champaign, IL 61820 wxobsrvr@sws.uiuc.edu Maria Peters, Weather Observer January: After a cold and snowy December,
More informationThe Climate of Seminole County
The Climate of Seminole County Seminole County is part of the Crosstimbers. This region is a transition region from the Central Great Plains to the more irregular terrain of southeastern Oklahoma. Average
More information5.1 THE GEM (GENERATION OF WEATHER ELEMENTS FOR MULTIPLE APPLICATIONS) WEATHER SIMULATION MODEL
5.1 THE GEM (GENERATION OF WEATHER ELEMENTS FOR MULTIPLE APPLICATIONS) WEATHER SIMULATION MODEL Clayton L. Hanson*, Gregory L. Johnson, and W illiam L. Frymire U. S. Department of Agriculture, Agricultural
More informationAgricultural Science Climatology Semester 2, Anne Green / Richard Thompson
Agricultural Science Climatology Semester 2, 2006 Anne Green / Richard Thompson http://www.physics.usyd.edu.au/ag/agschome.htm Course Coordinator: Mike Wheatland Course Goals Evaluate & interpret information,
More information4.5 Comparison of weather data from the Remote Automated Weather Station network and the North American Regional Reanalysis
4.5 Comparison of weather data from the Remote Automated Weather Station network and the North American Regional Reanalysis Beth L. Hall and Timothy. J. Brown DRI, Reno, NV ABSTRACT. The North American
More informationExtreme Weather and Climate Change: the big picture Alan K. Betts Atmospheric Research Pittsford, VT NESC, Saratoga, NY
Extreme Weather and Climate Change: the big picture Alan K. Betts Atmospheric Research Pittsford, VT http://alanbetts.com NESC, Saratoga, NY March 10, 2018 Increases in Extreme Weather Last decade: lack
More informationClimate Change Impact on Air Temperature, Daily Temperature Range, Growing Degree Days, and Spring and Fall Frost Dates In Nebraska
EXTENSION Know how. Know now. Climate Change Impact on Air Temperature, Daily Temperature Range, Growing Degree Days, and Spring and Fall Frost Dates In Nebraska EC715 Kari E. Skaggs, Research Associate
More informationTHE INFLUENCE OF HIGHLY RESOLVED SEA SURFACE TEMPERATURES ON METEOROLOGICAL SIMULATIONS OFF THE SOUTHEAST US COAST
THE INFLUENCE OF HIGHLY RESOLVED SEA SURFACE TEMPERATURES ON METEOROLOGICAL SIMULATIONS OFF THE SOUTHEAST US COAST Peter Childs, Sethu Raman, and Ryan Boyles State Climate Office of North Carolina and
More informationSeasonal prediction of extreme events
Seasonal prediction of extreme events C. Prodhomme, F. Doblas-Reyes MedCOF training, 29 October 2015, Madrid Climate Forecasting Unit Outline: Why focusing on extreme events? Extremeness metric Soil influence
More informationPractical Atmospheric Analysis
Chapter 12 Practical Atmospheric Analysis With the ready availability of computer forecast models and statistical forecast data, it is very easy to prepare a forecast without ever looking at actual observations,
More informationMonthly Long Range Weather Commentary Issued: SEPTEMBER 19, 2016 Steven A. Root, CCM, Chief Analytics Officer, Sr. VP,
Monthly Long Range Weather Commentary Issued: SEPTEMBER 19, 2016 Steven A. Root, CCM, Chief Analytics Officer, Sr. VP, sroot@weatherbank.com SEPTEMBER 2016 Climate Highlights The Month in Review The contiguous
More informationWeather History on the Bishop Paiute Reservation
Weather History on the Bishop Paiute Reservation -211 For additional information contact Toni Richards, Air Quality Specialist 76 873 784 toni.richards@bishoppaiute.org Updated 2//214 3:14 PM Weather History
More informationReprinted from MONTHLY WEATHER REVIEW, Vol. 109, No. 12, December 1981 American Meteorological Society Printed in I'. S. A.
Reprinted from MONTHLY WEATHER REVIEW, Vol. 109, No. 12, December 1981 American Meteorological Society Printed in I'. S. A. Fitting Daily Precipitation Amounts Using the S B Distribution LLOYD W. SWIFT,
More informationProbabilistic Decision-Making and Weather Assessment
5 Student Packet Probabilistic Decision-Making and Weather Assessment Use contents of this packet as you feel appropriate. You are free to copy and use any of the material in this lesson plan. Packet Contents
More informationJ8.4 TRENDS OF U.S. SNOWFALL AND SNOW COVER IN A WARMING WORLD,
J8.4 TRENDS OF U.S. SNOWFALL AND SNOW COVER IN A WARMING WORLD, 1948-2008 Richard R. Heim Jr. * NOAA National Climatic Data Center, Asheville, North Carolina 1. Introduction The Intergovernmental Panel
More information2003 Moisture Outlook
2003 Moisture Outlook Nolan Doesken and Roger Pielke, Sr. Colorado Climate Center Prepared by Tara Green and Odie Bliss http://climate.atmos.colostate.edu Through 1999 Through 1999 Fort Collins Total Water
More informationWill a warmer world change Queensland s rainfall?
Will a warmer world change Queensland s rainfall? Nicholas P. Klingaman National Centre for Atmospheric Science-Climate Walker Institute for Climate System Research University of Reading The Walker-QCCCE
More informationDefinitions Weather and Climate Climates of NYS Weather Climate 2012 Characteristics of Climate Regions of NYS NYS s Climates 1.
Definitions Climates of NYS Prof. Anthony Grande 2012 Weather and Climate Weather the state of the atmosphere at one point in time. The elements of weather are temperature, t air pressure, wind and moisture.
More informationNorth Carolina Climate Variations
North Carolina Climate Variations Sethu Raman Professor of Atmospheric and Marine Sciences and State Climatologist State Climate Office of North Carolina North Carolina State University Latest Drought
More informationWeather Instruments WHAT IS WEATHER
TOPIC TWO 1 WHAT IS WEATHER Weather is the combined short-term conditions found in the lower atmosphere. These conditions include precipitation, or rain and snow, as well as wind, pressure, storminess,
More informationTHE PRESENTATION OFTEMPERATURE INFORMATION IN TELEVISION BROADCASTS: WHAT IS NORMAL?
THE PRESENTATON OFTEMPERATURE NFORMATON N TELEVSON BROADCASTS: WHAT S NORMAL? Anthony R. Lupo\ Eric P. Kelseyl,2, Elizabeth A. McCoy\ Chris Halcomb\ Eric Aldrich 1 2, Stacy N. Allen 1 2, Adnan Akyuz 1
More informationA STUDY OF SOIL TEMPERATURE CLIMATOLOGY: COTTONWOOD, SOUTH DAKOTA SOIL TEMPERATURES FROM 1982 TO 2004
Proceedings of the South Dakota Academy of Science, Vol. 87 (2008) 269 A STUDY OF SOIL TEMPERATURE CLIMATOLOGY: COTTONWOOD, SOUTH DAKOTA SOIL TEMPERATURES FROM 1982 TO 2004 Dennis P. Todey, Joanne Puetz
More informationNational Meteorological Library and Archive
National Meteorological Library and Archive Fact sheet No. 4 Climate of the United Kingdom Causes of the weather in the United Kingdom The United Kingdom lies in the latitude of predominately westerly
More informationSEASONAL AND DAILY TEMPERATURES
1 2 3 4 5 6 7 8 9 10 11 12 SEASONAL AND DAILY TEMPERATURES Chapter 3 Earth revolves in elliptical path around sun every 365 days. Earth rotates counterclockwise or eastward every 24 hours. Earth closest
More informationAn Online Platform for Sustainable Water Management for Ontario Sod Producers
An Online Platform for Sustainable Water Management for Ontario Sod Producers 2014 Season Update Kyle McFadden January 30, 2015 Overview In 2014, 26 weather stations in four configurations were installed
More information2016 Meteorology Summary
2016 Meteorology Summary New Jersey Department of Environmental Protection AIR POLLUTION AND METEOROLOGY Meteorology plays an important role in the distribution of pollution throughout the troposphere,
More informationVariability of Reference Evapotranspiration Across Nebraska
Know how. Know now. EC733 Variability of Reference Evapotranspiration Across Nebraska Suat Irmak, Extension Soil and Water Resources and Irrigation Specialist Kari E. Skaggs, Research Associate, Biological
More informationEarth Science Lesson Plan Quarter 2, Week 6, Day 1
Earth Science Lesson Plan Quarter 2, Week 6, Day 1 1 Outcomes for Today Standard Focus: Earth Sciences 5.f students know the interaction of wind patterns, ocean currents, and mountain ranges results in
More informationClimate of Columbus. Aaron Wilson. Byrd Polar & Climate Research Center State Climate Office of Ohio.
Climate of Columbus Aaron Wilson Byrd Polar & Climate Research Center http://bpcrc.osu.edu/greenteam Overview Historical Climatology Climate Change & Impacts Projected Changes Summary 2 Historical Climatology
More informationMy Community vs. Nunavut Weather and Climate
My Community vs. Nunavut Content Areas Social Studies, Science, Technology Objective Students will differentiate between weather and climate. For 1 month, they will collect and graph daily temperature
More informationClimate Change or Climate Variability?
Climate Change or Climate Variability? Key Concepts: Greenhouse Gas Climate Climate change Climate variability Climate zones Precipitation Temperature Water cycle Weather WHAT YOU WILL LEARN 1. You will
More informationBell Work. REVIEW: Our Planet Earth Page 29 Document A & B Questions
9.12.16 Bell Work REVIEW: Our Planet Earth Page 29 Document A & B Questions Intro to Climate & Weather https://www.youtube.com/watch?v=vhgyoa70q7y Weather vs. Climate Video Climate & Weather 3.1 Weather
More informationName: Regents Earth Science. Weather and Climate - Review Questions
Name: Regents Earth Science Weather and Climate - Review Questions Date: Thayer - 279 1. People sometimes release substances into the atmosphere to increase the probability of rain by A) raising the air
More informationMozambique. General Climate. UNDP Climate Change Country Profiles. C. McSweeney 1, M. New 1,2 and G. Lizcano 1
UNDP Climate Change Country Profiles Mozambique C. McSweeney 1, M. New 1,2 and G. Lizcano 1 1. School of Geography and Environment, University of Oxford. 2.Tyndall Centre for Climate Change Research http://country-profiles.geog.ox.ac.uk
More informationFebruary 10, Mr. Jeff Smith, Chairman Imperial Valley Water Authority E County Road 1000 N Easton, IL Dear Chairman Smith:
February 1, 1 Mr. Jeff Smith, Chairman Imperial Valley Water Authority 8 E County Road 1 N Easton, IL Dear Chairman Smith: The Illinois State Water Survey (ISWS), under contract to the Imperial Valley
More informationINFLUENCE OF THE AVERAGING PERIOD IN AIR TEMPERATURE MEASUREMENT
INFLUENCE OF THE AVERAGING PERIOD IN AIR TEMPERATURE MEASUREMENT Hristomir Branzov 1, Valentina Pencheva 2 1 National Institute of Meteorology and Hydrology, Sofia, Bulgaria, Hristomir.Branzov@meteo.bg
More informationWhy the Earth has seasons. Why the Earth has seasons 1/20/11
Chapter 3 Earth revolves in elliptical path around sun every 365 days. Earth rotates counterclockwise or eastward every 24 hours. Earth closest to Sun (147 million km) in January, farthest from Sun (152
More informationOver the course of this unit, you have learned about different
70 People and Weather TA L K I N G I T O V E R Over the course of this unit, you have learned about different aspects of earth s weather and atmosphere. Atmospheric scientists, climatologists, hydrologists,
More informationFactors that Affect Climate
Factors that Affect Climate What is climate? Climate is the average weather conditions over a long period of time Includes average temperatures and precipitation, wind patterns, humidity, air pressure
More informationClimatology of Surface Wind Speeds Using a Regional Climate Model
Climatology of Surface Wind Speeds Using a Regional Climate Model THERESA K. ANDERSEN Iowa State University Mentors: Eugene S. Takle 1 and Jimmy Correia, Jr. 1 1 Iowa State University ABSTRACT Long-term
More information3rd GRADE MINIMUM CONTENTS UNIT 17: AIR
3rd GRADE MINIMUM CONTENTS UNIT 17: AIR WHAT S THE AIR? Air is the mixture of gases that surround the Earth. The main gases in air are: a. Nitrogen. This is the most abundant gas. b. Oxygen. This is the
More informationCh. 3: Weather Patterns. Sect. 1: Air Mass & Fronts Sect. 2: Storms Sect. 3: Predicting the Weather
Ch. 3: Weather Patterns Sect. 1: Air Mass & Fronts Sect. 2: Storms Sect. 3: Predicting the Weather Sect. 1: Air Masses & Fronts An air mass is a huge body of air that has similar temperature, humidity,
More informationHistorical and Projected Future Climate Changes in the Great Lakes Region
Historical and Projected Future Climate Changes in the Great Lakes Region B.J. Baule Great Lakes Integrates Sciences + Assessments University of Michigan Jeffrey A. Andresen Dept. of Geography Michigan
More informationThe Climate of Haskell County
The Climate of Haskell County Haskell County is part of the Hardwood Forest. The Hardwood Forest is characterized by its irregular landscape and the largest lake in Oklahoma, Lake Eufaula. Average annual
More information1.6 TRENDS AND VARIABILITY OF SNOWFALL AND SNOW COVER ACROSS NORTH AMERICA AND EURASIA. PART 2: WHAT THE DATA SAY
1.6 TRENDS AND VARIABILITY OF SNOWFALL AND SNOW COVER ACROSS NORTH AMERICA AND EURASIA. PART 2: WHAT THE DATA SAY David A. Robinson* Rutgers University, Department of Geography, Piscataway, New Jersey
More informationMonthly Long Range Weather Commentary Issued: APRIL 1, 2015 Steven A. Root, CCM, President/CEO
Monthly Long Range Weather Commentary Issued: APRIL 1, 2015 Steven A. Root, CCM, President/CEO sroot@weatherbank.com FEBRUARY 2015 Climate Highlights The Month in Review The February contiguous U.S. temperature
More informationATMOSPHERIC CIRCULATION AND WIND
ATMOSPHERIC CIRCULATION AND WIND The source of water for precipitation is the moisture laden air masses that circulate through the atmosphere. Atmospheric circulation is affected by the location on the
More informationClimate Outlook through 2100 South Florida Ecological Services Office Vero Beach, FL September 9, 2014
Climate Outlook through 2100 South Florida Ecological Services Office Vero Beach, FL September 9, 2014 Short Term Drought Map: Short-term (
More informationDEPARTMENT OF EARTH & CLIMATE SCIENCES Name SAN FRANCISCO STATE UNIVERSITY Nov 29, ERTH 360 Test #2 200 pts
DEPARTMENT OF EARTH & CLIMATE SCIENCES Name SAN FRANCISCO STATE UNIVERSITY Nov 29, 2018 ERTH 360 Test #2 200 pts Each question is worth 4 points. Indicate your BEST CHOICE for each question on the Scantron
More informationDrought and Climate Extremes Indices for the North American Drought Monitor and North America Climate Extremes Monitoring System. Richard R. Heim Jr.
Drought and Climate Extremes Indices for the North American Drought Monitor and North America Climate Extremes Monitoring System Richard R. Heim Jr. NOAA/NESDIS/National Climatic Data Center Asheville,
More informationThree main areas of work:
Task 2: Climate Information 1 Task 2: Climate Information Three main areas of work: Collect historical and projected weather and climate data Conduct storm surge and wave modeling, sea-level rise (SLR)
More informationApplication and verification of ECMWF products 2017
Application and verification of ECMWF products 2017 Finnish Meteorological Institute compiled by Weather and Safety Centre with help of several experts 1. Summary of major highlights FMI s forecasts are
More informationA Re-examination of the Lost Lake Effect in Buffalo, New York
A Re-examination of the Lost Lake Effect in Buffalo, New York Stephen Vermette and Emmanuel Orengo Department of Geography and Planning Buffalo State College Buffalo, NY 1 E-mail: vermetsj@buffalostate.edu
More informationFunding provided by NOAA Sectoral Applications Research Project CLIMATE. Basic Climatology Colorado Climate Center
Funding provided by NOAA Sectoral Applications Research Project CLIMATE Basic Climatology Colorado Climate Center Remember These? Factor 1: Our Energy Source Factor 2: Revolution & Tilt Factor 3: Rotation!
More informationANALYSIS OF CLIMATIC DATA FOR THE CHATEAU, MT RUAPHEHU ( ), IN RELATION TO CLIMATIC CHANGE
Weather and Climate (1991) 11: 15-26 15 ANALYSIS OF CLIMATIC DATA FOR THE CHATEAU, MT RUAPHEHU (1930-1988), IN RELATION TO CLIMATIC CHANGE Frances West and Terry Healy Department of Earth Sciences, University
More informationLesson Adaptation Activity: Analyzing and Interpreting Data
Lesson Adaptation Activity: Analyzing and Interpreting Data Related MA STE Framework Standard: 3-ESS2-1. Use graphs and tables of local weather data to describe and predict typical weather during a particular
More informationWhat is the difference between Weather and Climate?
What is the difference between Weather and Climate? Objective Many people are confused about the difference between weather and climate. This makes understanding the difference between weather forecasts
More informationAnalysis of meteorological measurements made over three rainy seasons in Sinazongwe District, Zambia.
Analysis of meteorological measurements made over three rainy seasons in Sinazongwe District, Zambia. 1 Hiromitsu Kanno, 2 Hiroyuki Shimono, 3 Takeshi Sakurai, and 4 Taro Yamauchi 1 National Agricultural
More information(Severe) Thunderstorms and Climate HAROLD BROOKS NOAA/NSSL
(Severe) Thunderstorms and Climate HAROLD BROOKS NOAA/NSSL HAROLD.BROOKS@NOAA.GOV Big questions How and why are weather hazards distributed? Are things changing in time and will they? Begin with thunderstorm
More informationMinnesota s Climatic Conditions, Outlook, and Impacts on Agriculture. Today. 1. The weather and climate of 2017 to date
Minnesota s Climatic Conditions, Outlook, and Impacts on Agriculture Kenny Blumenfeld, State Climatology Office Crop Insurance Conference, Sep 13, 2017 Today 1. The weather and climate of 2017 to date
More information8.1 Attachment 1: Ambient Weather Conditions at Jervoise Bay, Cockburn Sound
8.1 Attachment 1: Ambient Weather Conditions at Jervoise Bay, Cockburn Sound Cockburn Sound is 20km south of the Perth-Fremantle area and has two features that are unique along Perth s metropolitan coast
More informationSeasonal & Daily Temperatures
Seasonal & Daily Temperatures Photo MER Variations in energy input control seasonal and daily temperature fluctuations 1 Cause of the Seasons The tilt of the Earth s axis relative to the plane of its orbit
More informationRR#4 - Multiple Choice
1. The map below shows the amount of snowfall, in inches, produced by a lake-effect snowstorm in central New York State. The wind that produced this snowfall pattern most likely came from the 1) northeast
More informationFUTURE CARIBBEAN CLIMATES FROM STATISTICAL AND DYNAMICAL DOWNSCALING
FUTURE CARIBBEAN CLIMATES FROM STATISTICAL AND DYNAMICAL DOWNSCALING Arnoldo Bezanilla Morlot Center For Atmospheric Physics Institute of Meteorology, Cuba The Caribbean Community Climate Change Centre
More informationNorth Carolina Climate December 2011
North Carolina Climate December 2011 Online: http://www.nc-climate.ncsu.edu/office/newsletters North Carolina Climate, the monthly newsletter of the State Climate Office of NC, covers information on a
More information