Chapter 9. Weather Patterns & Midlatitude Cyclones
|
|
- August Rodgers
- 5 years ago
- Views:
Transcription
1 Chapter 9 Weather Patterns & Midlatitude Cyclones
2
3 Frontal Weather Fronts are boundary surfaces between different air masses. Warm front Cold front Stationary front Occluded front Drylines
4 Frontal Weather Warm fronts: A warm front occurs when warm air moves into colder air. It is shown on a weather map by a red line with red semicircles on the line in the direction of travel. Warm fronts have relatively gentle slopes.
5 Warm fronts Frontal Weather
6 Warm fronts Frontal Weather
7 Cold fronts: Frontal Weather When cold air advances into warm air, the zone of discontinuity is called a cold front. It is represented on a weather map by a blue line with blue triangles pointing in the direction of travel. Their slopes are about twice as steep as warm fronts.
8 Cold fronts Frontal Weather
9 Cold fronts Frontal Weather
10 Frontal Weather Backdoor cold front (nor easter): Rather than moving from west to east, this type of cold front moves from east to west in the northeast U.S. They occur primarily in the spring. The weather goes from warm to cool and moist.
11 Cold front Frontal Weather
12 Man cross-country skiing in Boston nor easter Dec Credit: REUTERS/Brian Snyder
13 Stationary front: Frontal Weather This occurs when airflow is neither toward cold air nor a warm air mass. On a weather map, it is represented by red semicircles and blue triangles alternating sides. They may remain over an area for a long time.
14 Occluded front: Frontal Weather When rapidly moving cold air overtakes a warm front, an occluded front occurs. These are represented by a purple line with alternating semicircles and triangles pointing in the direction of movement. Occlusion: As cold air wedges a warm front upward, a new front forms between the advancing cold air and the warm air.
15 Occluded front Frontal Weather
16 Frontal Weather Drylines: Drylines are boundaries, which develop most often over the southern Great Plains. They occur when dry (ct) air meets moist, (mt) air from the Gulf of Mexico. They most often generate thunderstorms.
17
18 Midlatitude Cyclones and the Polar Front Theory Midlatitude cyclones: These are low pressure systems. Their diameters often exceed 1000 km. These cyclones usually travel west to east. Most have a warm front and a cold front extending from center. They frequently produce precipitation.
19 1. In general, Fronts are boundary surfaces that separate air masses of different densities. 2. A polar front separates cold Arctic air from warm subtropical air. 3. Fronts are normally between 15 and 200 km wide - where the two air masses fight each other.
20
21 Mid-Latitude Cyclone 1. Development & intensification of a midlatitude cyclone is explained in terms of the "polar-front" theory. 2. Cyclones form along fronts. Life cycle last about 3 to 7 days.
22 Mid-Latitude Cyclone Six stages: 1. Formation (cyclogenesis) 2. Development of wave in the front 3. Cyclonic circulation established 4. Occlusion begins 5. Occluded front develops 6. Cyclone dissipates
23
24
25
26 Mid-Latitude Cyclone - 3 Stage 1. Two air masses of different densities & temperatures are moving parallel to the front, and in opposite directions. Typically - cp associated with polar easterlies on the north of the front, mt driven by westerlies on the south. (This causes counterclockwise rotation of the air mass.) Stage 2. Under suitable conditions, the front takes on a wave shape that is usually several hundred km long.
27 Mid-Latitude Cyclone 4 Stage 3. For a cyclone to develop, the wave must steepen and "break" (just like surfing beaches). The warm moves pole-wards into the cold air, establishing a warm front, while cold air moves equator-wards, establishing a cold front. This sets up a circular flow pattern in a counterclockwise direction - the cyclone. Stage 4. Cold front normally travels about 50% faster then the warm front, and overtakes it, causing occlusion. Ends of the fronts in center of cyclone occluded first.
28 Mid-Latitude Cyclone - 5 Stage 5. The size of the occluded front grows in length, displacing the warm front aloft. The storm usually intensifies, the central pressure falls, and wind speeds increase. During Winter, can get heavy snowfalls and blizzard-like conditions (because of the high winds). Stage 6. Once all the warm air has been displaced, we have just the cold air and no temperature gradient. There is thus no energy left to drive the cyclone, which therefore dissipates.
29 Idealized Weather Map of a Midlatitude Cyclone
30 Using winds as a forecasting tool.
31
32 Midwest Floods of 2008 & 1993 June 2008 floods The Great Flood of 1993
33 Rainfall based on 10 days of satellite data
34 Cedar River, Cedar Rapids, OH
35 Monroe County, 1993
36
37 Flash Floods are exactly what they sound like. You cannot out run rushing water.
38 Violent Spring Weather
39 Case Study of a Midlatitude Cyclone March 21 The storm reached the west coast of U.S. March 23 It was centered over the Kansas-Nebraska border. It was well developed. Air pressure was at 985 millibars.
40
41 Case Study of a Midlatitude Cyclone March 24 Air pressure deepened to 982 millibars. The storm curved northward through Iowa. An occluded front developed when the cold front overtook the warm front. Severe weather was produced.
42
43 March 25 Pressure moved up to 1000 millibars. The storm was situated over the Great Lakes. It dissipated within 24 hours.
44
45
46 Travelling Cyclones 1. Cyclones generally move over the surface of the Earth at about 25 to 50 kph. 2. The path of a cyclone is controlled to a large extent by the air flow aloft (500 mb level). The upper level flow "steers" the surface cyclone. 3. It is important to be able to predict the path of a surface cyclone. 4. We must understand and be able to predict the wavy flow in the jetstream.
47 Travelling Cyclones In general, cyclones form where large temperature contrasts occur in the lower troposphere. 2. Main sites for cyclone formation: lee side of Rockies; along Atlantic coast, east of the Appalachians; North Pacific; North Atlantic.
48 Major sites of cyclone formation
49 Patterns of Movement 1. Cyclones that form east of the Rockies tend to migrate to the east, and then northeast. 2. Cyclones that influence western North America originate over the Pacific, and move northeastwards towards the Gulf of Alaska, where they merge with the Aleutian low.
50 Typical cyclone tracks
51 Anticyclones & Blocking Highs 1. Although high pressure systems generally produce clear skies and calm conditions, they are not always a "good thing". 2. Large anticyclones often develop over the Arctic in winter. If these migrate south over the plains (no blocking mountains), their dense frigid air can bring atypical cold weather.
52 Anticyclones & Blocking Highs 1. Occasionally, large midlatitude anticyclones will stagnate, staying at the same location for 2 or more weeks. 2. They deflect the normally eastwards flow of air towards the poles. 3. If they stay at the same location, they are called Blocking Highs.
53
54 Anticyclones & Blocking Highs 1. Blocking highs cause good weather to exist around themselves, but can cause extensive rain by not allowing cyclones to continue to the east as usual. 2. Blocking highs can also cause air pollution episodes. The subsidence within an anticyclone can produce a temperature inversion (with warm air lying above cooler air) that acts like a lid to trap pollutants. Winds near the center of the anticyclone are light, so do not disperse the pollutants.
55 End Chapter 9 Chapter 9 Homework: GIST: 2, 4, 5, 8 Problems 3 & 4
Chapter 9: Weather Patterns
Chapter 9: Weather Patterns Mid Latitude Cyclones: extratropical cyclones, Nor easters Region southern FL to Alaska Lifecycle and associated weather Regional Influence Polar Front Theory: -Norwegian Cyclone
More informationAir Masses, Weather Systems and Hurricanes
The Earth System - Atmosphere IV Air Masses, Weather Systems and Hurricanes Air mass a body of air which takes on physical characteristics which distinguish it from other air. Classified on the basis of
More information4/29/2011. Mid-latitude cyclones form along a
Chapter 10: Cyclones: East of the Rocky Mountain Extratropical Cyclones Environment prior to the development of the Cyclone Initial Development of the Extratropical Cyclone Early Weather Along the Fronts
More informationair masses and Fronts 2013.notebook January 29, 2013
1/4/12 Notes 1 Weather Data Log.docx 2 Air Masses Uniform bodies of air An air mass is a large body of air that has similar temperature and moisture throughout. How to name an air mass: first write the
More informationAIR MASSES. Large bodies of air. SOURCE REGIONS areas where air masses originate
Large bodies of air AIR MASSES SOURCE REGIONS areas where air masses originate Uniform in composition Light surface winds Dominated by high surface pressure The longer the air mass remains over a region,
More informationChapter 12 Fronts & Air Masses
Chapter overview: Anticyclones or highs Air Masses o Classification o Source regions o Air masses of North America Fronts o Stationary fronts o Cold fronts o Warm fronts o Fronts and the jet stream o Frontogenesis
More informationAir Masses of North America cp and ca air masses Air mass characterized by very cold and dry conditions
Chapter 8: Air Masses, Fronts, and Middle-Latitude Cyclones Air masses Fronts Middle-latitude cyclones Air Masses Air mass an extremely large body of air whose properties of temperature and humidity are
More informationLecture #14 March 29, 2010, Monday. Air Masses & Fronts
Lecture #14 March 29, 2010, Monday Air Masses & Fronts General definitions air masses source regions fronts Air masses formation types Fronts formation types Air Masses General Definitions a large body
More informationFoundations of Earth Science, 6e Lutgens, Tarbuck, & Tasa
Foundations of Earth Science, 6e Lutgens, Tarbuck, & Tasa Weather Patterns and Severe Weather Foundations, 6e - Chapter 14 Stan Hatfield Southwestern Illinois College Air masses Characteristics Large body
More informationFig Major air masses of the world
Fig. 9.3 Major air masses of the world CLASSIFICATION FOUR BASIC CATEGORIES OF AIR MASSES: POLAR - P ARCTIC - A TROPICAL - T EQUATORIAL - E TWO DESIGNATIONS OF SURFACE IN SOURCE REGION MARITIME - m. CONTINENTAL
More informationAir Masses, Fronts, Storm Systems, and the Jet Stream
Air Masses, Fronts, Storm Systems, and the Jet Stream Air Masses When a large bubble of air remains over a specific area of Earth long enough to take on the temperature and humidity characteristics of
More informationMET Lecture 18 Cold Waves (CH14)
MET 4300 Lecture 18 Cold Waves (CH14) Cold Waves, or Polar Outbreaks Influx of unusually cold air into middle and lower latitudes Generally cover larger areas than blizzards or ice storms On average claim
More informationObservation Homework Due 11/24. Previous Lecture. Midlatitude Cyclones
Lecture 21 Midlatitude Cyclones Observation Homework Due 11/24 1 2 Midlatitude Cyclones Midlatitude Cyclone or Winter Storm Cyclogenesis Energy Source Life Cycle Air Streams Vertical Structure Storm Hazards
More informationLecture Outlines PowerPoint. Chapter 19 Earth Science 11e Tarbuck/Lutgens
Lecture Outlines PowerPoint Chapter 19 Earth Science 11e Tarbuck/Lutgens 2006 Pearson Prentice Hall This work is protected by United States copyright laws and is provided solely for the use of instructors
More informationEarth Science, 11e. Weather Patterns and Severe Storms Chapter 19. Air masses. A cold Canadian air mass Figure Air masses. Air masses 9/5/2012
2006 Pearson Prentice Hall Lecture Outlines PowerPoint Chapter 19 Earth Science 11e Tarbuck/Lutgens This work is protected by United States copyright laws and is provided solely for the use of instructors
More informationAOSC 200 Tim Canty. Class Web Site: Topics for today: Air Masses. Fronts. Lecture 19 Apr
Air Masses AOSC 200 Tim Canty Class Web Site: http://www.atmos.umd.edu/~tcanty/aosc200 Topics for today: Air Masses Fronts Lecture 19 Apr 11 2019 1 Today s Weather Map http://www.wpc.ncep.noaa.gov/#page=sfc
More informationMET 3502 Synoptic Meteorology. Lecture 8: September 16, AIRMASSES, FRONTS and FRONTAL ANALYSIS (2)
MET 3502 Synoptic Meteorology Lecture 8: September 16, 2010 AIRMASSES, FRONTS and FRONTAL ANALYSIS (2) Identifying a cold front on a surface weather map: 1. Surface front is located at the leading edge
More informationGlobal Winds AOSC 200 Tim Canty
Global Winds AOSC 200 Tim Canty Class Web Site: http://www.atmos.umd.edu/~tcanty/aosc200 Topics for today: Air Masses Fronts Lecture 18 Oct 31 2017 1 Air Masses What is an air mass? Large body of air whose
More informationChapter 21. Weather Patterns and Severe Storms
Chapter 21 Weather Patterns and Severe Storms 20.1 Air Masses Air Masses and Weather Air Masses An air mass is an immense body of air that is characterized by similar temperatures and amounts of moisture
More informationMid-latitude Cyclones & Air Masses
Lab 9 Mid-latitude Cyclones & Air Masses This lab will introduce students to the patterns of surface winds around the center of a midlatitude cyclone of low pressure. The types of weather associated with
More informationChapter 10: Mid-latitude Cyclones Mid-Latitude Cyclones
Chapter 10: Mid-latitude Cyclones Mid-Latitude Cyclones Mid-latitude cyclones form along a boundary separating polar air from warmer air to the south. Life Cycle of Cyclone Cyclone Structures Steering
More informationChapter 10: Mid-latitude Cyclones
Chapter 10: Mid-latitude Cyclones Life Cycle of Cyclone Cyclone Structures Steering of Cyclone Mid-Latitude Cyclones Mid-latitude cyclones form along a boundary separating polar air from warmer air to
More informationChapter 12: Meteorology
Chapter 12: Meteorology Section 1: The Causes of Weather 1. Compare and contrast weather and climate. 2. Analyze how imbalances in the heating of Earth s surface create weather. 3. Describe how and where
More informationWeather Patterns and Severe Storms
Weather Patterns and Severe Storms 20.1 Air Masses Air Masses and Weather Air Masses An air mass is an immense body of air that is characterized by similar temperatures and amounts of moisture at any given
More informationGuided Notes Weather. Part 2: Meteorology Air Masses Fronts Weather Maps Storms Storm Preparation
Guided Notes Weather Part 2: Meteorology Air Masses Fronts Weather Maps Storms Storm Preparation The map below shows North America and its surrounding bodies of water. Country borders are shown. On the
More informationMiddle-Latitude Cyclone
Middle-Latitude Cyclone What is a mid-latitude cyclone? - The mid-latitude cyclone is a synoptic scale low pressure system that has cyclonic (counter-clockwise in northern hemisphere) flow that is found
More information5 Atmospheric Disturbances 7 1.Cyclones- tropical and temperate and associated weather conditions. 2.Anticyclones and associated weather conditions.
5 Atmospheric Disturbances 7 1.Cyclones- tropical and temperate and associated weather conditions. 2.Anticyclones and associated weather conditions. atmospheric disturbances (weather systems) that are
More informationScience 1206 Chapter 1 - Inquiring about Weather
Science 1206 Chapter 1 - Inquiring about Weather 1.1 - The Atmosphere: Energy Transfer and Properties (pp. 10-25) Weather and the Atmosphere weather the physical conditions of the atmosphere at a specific
More informationAIR MASSES SOURCE REGION CHARACTERISTICS Continental Arctic (ca) Greenland, Antarctica, Highest latitudes of Asia and North America
GEOGRAPHY CLIMATOLOGY AIRMASS, FRONT AND TEMPERATE CYCLONE AIRMASS A large body of air having little horizontal variation in temperature and moisture is called an airmass. Airmass acquires its properties
More informationATSC 2000 Final Fall 2005
ATSC 2000 Final Fall 2005 true/false /25 multiple choice /25 short answer /23 essay /10 total /83 or % True/False Indicate whether the sentence or statement is true or false. (25 questions 1% each) 1.
More informationLecture 14. Extratropical Cyclones extratropical cyclone
Lecture 14. Extratropical Cyclones In mid-latitudes, much of our weather is associated with a particular kind of storm, the extratropical cyclone Cyclone: circulation around low pressure center Some midwesterners
More informationWeather Systems. Section
Section 1 12.2 Objectives Compare and contrast the three major wind systems. Identify four types of fronts. Distinguish between highand low-pressure systems. Review Vocabulary convection: the transfer
More informationSection Fronts 1 FOCUS Section Objectives Key Concepts Vocabulary Reading Strategy 20.5 Describe Outlining 20.
Section 20.2 20.2 Fronts 1 FOCUS Section Objectives 20.5 Describe the formation of a front. 20.6 Differentiate among the formation of a warm front, cold front, stationary front, and occluded front. 20.7
More informationTransient and Eddy. Transient/Eddy Flux. Flux Components. Lecture 3: Weather/Disturbance. Transient: deviations from time mean Time Mean
Lecture 3: Weather/Disturbance Transients and Eddies Climate Roles Mid-Latitude Cyclones Tropical Hurricanes Mid-Ocean Eddies Transient and Eddy Transient: deviations from time mean Time Mean Eddy: deviations
More informationChapter 18/19. Ch 18
Chapter 18/19 Ch 18 Pressure Force of the weight of the air above At sea level: 14.7 lbs/in2 Decreases with altitude Inches of mercury (29.92 @ sea level) Barometer - instrument used to measure air pressure
More informationWhat a Hurricane Needs to Develop
Weather Weather is the current atmospheric conditions, such as air temperature, wind speed, wind direction, cloud cover, precipitation, relative humidity, air pressure, etc. 8.10B: global patterns of atmospheric
More informationTrue or false: The atmosphere is always in hydrostatic balance. A. True B. False
Clicker Questions and Clicker Quizzes Clicker Questions Chapter 7 Of the four forces that affect the motion of air in our atmosphere, which is to thank for opposing the vertical pressure gradient force
More informationAir Masses and Fronts. Ahrens Chapter 12
Air Masses and Fronts Ahrens Chapter 12 Air Mass Properties Air masses take on the properties of the underlying surface Air masses are classified according to their location of origin Geographical Characteristics
More informationWind: Global Systems Chapter 10
Wind: Global Systems Chapter 10 General Circulation of the Atmosphere General circulation of the atmosphere describes average wind patterns and is useful for understanding climate Over the earth, incoming
More informationWeather Unit Part 2: Meteorology
Name: Earth Science Date: Period: Weather Unit Part 2: Meteorology 1 The map below shows North America and its surrounding bodies of water. Country borders are shown. On the map, label the following locations:
More information1. Which weather map symbol is associated with extremely low air pressure? A) B) C) D) 2. The diagram below represents a weather instrument.
1. Which weather map symbol is associated with extremely low air pressure? 2. The diagram below represents a weather instrument. Which weather variable was this instrument designed to measure? A) air pressure
More informationDivergence, Spin, and Tilt. Convergence and Divergence. Midlatitude Cyclones. Large-Scale Setting
Midlatitude Cyclones Equator-to-pole temperature gradient tilts pressure surfaces and produces westerly jets in midlatitudes Waves in the jet induce divergence and convergence aloft, leading to surface
More informationForecasting Weather: Air Masses and Fronts
Forecasting Weather: Air Masses and Fronts Weather is a combination of local conditions at any one time. It's what's happening outside right now, right here. Weather includes: Temperature Humidity Air
More informationb. The boundary between two different air masses is called a.
NAME Earth Science Weather WebQuest Part 1. Air Masses 1. Find out what an air mass is. http://okfirst.mesonet.org/train/meteorology/airmasses.html a. What is an air mass? An air mass is b. The boundary
More information- air masses. Further Reading: Chapter 08 of the text book. Outline. - air masses of the world and of N. America. - fronts: warm, cold and occluded
(1 of 10) Further Reading: Chapter 08 of the text book Outline - air masses - air masses of the world and of N. America - fronts: warm, cold and occluded (2 of 10) Previously, Introduction We discussed
More informationName SOLUTIONS T.A./Section Atmospheric Science 101 Homework #6 Due Thursday, May 30 th (in class)
Name SOLUTIONS T.A./Section Atmospheric Science 101 Homework #6 Due Thursday, May 30 th (in class) 1. General Circulation Briefly describe where each of the following features is found in the earth s general
More information** warm air mass
Frontal cyclones -otherwise known as mid-latitude or wave cyclones. A cyclone is a cyclonically rotating system which, in mid- and high-latitudes is normally associated with the boundary between air masses
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 informationWeather, Air Masses, Fronts and Global Wind Patterns. Meteorology
Weather, Air Masses, Fronts and Global Wind Patterns Meteorology Weather is what conditions of the atmosphere are over a short period of time. Climate is how the atmosphere "behaves" over long periods
More informationAir Masses and Fronts
Air Masses and Fronts AT 350: Ahrens Chapter 12 Air Mass Properties Air masses take on the properties of the underlying surface Air masses are classified according to their location of origin Geographical
More informationMid-Latitude Cyclones and Fronts. Lecture 12 AOS 101
Mid-Latitude Cyclones and Fronts Lecture 12 AOS 101 Homework 4 COLDEST TEMPS GEOSTROPHIC BALANCE Homework 4 FASTEST WINDS L Consider an air parcel rising through the atmosphere The parcel expands as it
More informationWhy There Is Weather?
Lecture 6: Weather, Music Of Our Sphere Weather and Climate WEATHER The daily fluctuations in atmospheric conditions. The atmosphere on its own can produce weather. (From Understanding Weather & Climate)
More informationFronts. Direction of Front
Fronts Direction of Front Direction of Front Warm Front A cold air mass meets and displaces a warm air mass. Because the moving cold air is more dense, it moves under the less-dense warm air, pushing it
More informationChapter22 Weather Maps
Name Teacher Period Date hapter22 Weather Maps hapter 22 Skill Sheet 1: Fronts Air masses are bodies of air that are relatively uniform in temperature and humidity. These bodies of air take on the characteristic
More informationPage 1. Name:
Name: 1) As the difference between the dewpoint temperature and the air temperature decreases, the probability of precipitation increases remains the same decreases 2) Which statement best explains why
More informationThe Planetary Circulation System
12 The Planetary Circulation System Learning Goals After studying this chapter, students should be able to: 1. describe and account for the global patterns of pressure, wind patterns and ocean currents
More information3) What is the difference between latitude and longitude and what is their affect on local and world weather and climate?
www.discoveryeducation.com 1) Describe the difference between climate and weather citing an example of each. Describe how water (ocean, lake, river) has a local effect on weather and climate and provide
More informationCh. 3: Weather Patterns
Ch. 3: Weather Patterns Sect. 1: Air Mass & Fronts Sect. 2: Storms Sect. 3: Predicting the Weather Sect. 4: Weather forecasters use advanced technologies Ch. 3 Weather Fronts and Storms Objective(s) 7.E.1.3
More informationThe Earth System - Atmosphere III Convection
The Earth System - Atmosphere III Convection Thunderstorms 1. A thunderstorm is a storm that produces lightning (and therefore thunder) 2. Thunderstorms frequently produce gusty winds, heavy rain, and
More informationA. Weather - the conditions of the variables of the atmosphere for any short period of time
WEATHER & THE ATMOSPHERE A. Weather - the conditions of the variables of the atmosphere for any short period of time Meteorology - the study of weather and weather related variables - the variables: Topic
More informationWeather Elements (air masses, fronts & storms)
Weather Elements (air masses, fronts & storms) S6E4. Obtain, evaluate and communicate information about how the sun, land, and water affect climate and weather. A. Analyze and interpret data to compare
More informationAir Masses and Fronts II
Air Masses and Fronts II Brief review An air mass is a large body of air whose properties of temperature and humidity are fairly similar in any horizontal direction Source regions for air masses tend to
More informationFronts in November 1998 Storm
Fronts in November 1998 Storm Much of the significant weather observed in association with extratropical storms tends to be concentrated within narrow bands called frontal zones. Fronts in November 1998
More informationHow Can You Predict Weather Changes?
How Can You Predict Weather Changes? How to Predict Weather Meteorologists make weather predictions daily. They use the same processes that you will. They collect weather data. They plot the data on maps.
More information- tornadoes. Further Reading: Chapter 08 of the text book. Outline. - cyclones and anti-cyclones. -tropical storms. -Storm surge
(1 of 16) Further Reading: Chapter 08 of the text book Outline - cyclones and anti-cyclones - tornadoes -tropical storms -Storm surge (2 of 16) Introduction Previously, We talked about fronts and their
More informationKeys to Climate Climate Classification Low Latitude Climates Midlatitude Climates High Latitude Climates Highland Climates Our Changing Climate
Climate Global Climates Keys to Climate Climate Classification Low Latitude Climates Midlatitude Climates High Latitude Climates Highland Climates Our Changing Climate Keys to Climate Climate the average
More informationNC Earth Science Essential Standards
Chapter 12 Meteorology NC ESES Unit 6: The Atmosphere and Weather NC Earth Science Essential Standards EEn. 2.5 - Understand the structure of and processes within our atmosphere. EEn. 2.5.1 - Summarize
More information25.1 Air Masses. Section 25.1 Objectives
Section 25.1 Objectives Explain how an air mass forms. List the four main types of air masses. Describe how air masses affect the weather of North America. Air Masses 25.1 Air Masses Differences in air
More informationWeather Notes. Chapter 16, 17, & 18
Weather Notes Chapter 16, 17, & 18 Weather Weather is the condition of the Earth s atmosphere at a particular place and time Weather It is the movement of energy through the atmosphere Energy comes from
More informationMiddle Latitude Cyclones a storm that forms at middle and high latitudes, outside of the tropics.
Middle Latitude Cyclones a storm that forms at middle and high latitudes, outside of the tropics. Polar Front Theory a theory that explains the life cycle of mid latitude cyclones and their associated
More informationMET Lecture 20 Mountain Snowstorms (CH16)
MET 4300 Lecture 20 Mountain Snowstorms (CH16) Learning Objectives Provide an overview of the importance and impacts of mountain snowstorms in the western US Describe how topography influence precipitation
More informationStorm and Storm Systems Related Vocabulary and Definitions. Magnitudes are measured differently for different hazard types:
Storm and Storm Systems Related Vocabulary and Definitions Magnitude: this is an indication of the scale of an event, often synonymous with intensity or size. In natural systems, magnitude is also related
More information3. As warm, moist air moves into a region, barometric pressure readings in the region will generally 1. decrease 2. increase 3.
Teacher: Mr. Prizzi Castle Learning Review 1 1. Which process most directly results in cloud formation? 1. condensation 3. precipitation 2. transpiration 4. radiation 2. An air mass originating over north
More information(April 7, 2010, Wednesday) Tropical Storms & Hurricanes Part 2
Lecture #17 (April 7, 2010, Wednesday) Tropical Storms & Hurricanes Part 2 Hurricane Katrina August 2005 All tropical cyclone tracks (1945-2006). Hurricane Formation While moving westward, tropical disturbances
More informationSatellites, Weather and Climate Module??: Polar Vortex
Satellites, Weather and Climate Module??: Polar Vortex SWAC Jan 2014 AKA Circumpolar Vortex Science or Hype? Will there be one this year? Today s objectives Pre and Post exams What is the Polar Vortex
More information8/18/2014. Chapter 17: Weather Patterns. Section 1 (Air Masses and Fronts) 8 th Grade
Section 1 (Air Masses and Fronts) Chapter 17: Weather Patterns 8 th Grade air mass a huge body of air that has similar temperature, humidity, and pressure throughout Cold, dense air has a higher pressure
More informationTropical Moist Rainforest
Tropical or Lowlatitude Climates: Controlled by equatorial tropical air masses Tropical Moist Rainforest Rainfall is heavy in all months - more than 250 cm. (100 in.). Common temperatures of 27 C (80 F)
More informationhttp://www.ssec.wisc.edu/data/composites.html Red curve: Incoming solar radiation Blue curve: Outgoing infrared radiation. Three-cell model of general circulation Mid-latitudes: 30 to 60 latitude MID-LATITUDES
More informationESCI 241 Meteorology Lesson 19 Tropical Cyclones Dr. DeCaria
ESCI 241 Meteorology Lesson 19 Tropical Cyclones Dr. DeCaria READING: Chapter 16 GENERAL A tropical cyclone is a large, low-pressure system that forms over the tropical oceans. Tropical cyclones are classified
More informationChapter 14 Lecture Outline. Weather Patterns and Severe Weather
Chapter 14 Lecture Outline Weather Patterns and Severe Weather Air Masses Characteristics Large body of air 1600 km (1000 mi) or more across Several km thick Similar temperature at any given altitude Similar
More informationImpacts of the April 2013 Mean trough over central North America
Impacts of the April 2013 Mean trough over central North America By Richard H. Grumm National Weather Service State College, PA Abstract: The mean 500 hpa flow over North America featured a trough over
More informationClimate versus Weather
Climate versus Weather What is climate? Climate is the average weather usually taken over a 30-year time period for a particular region and time period. Climate is not the same as weather, but rather,
More informationSEVERE WEATHER AND FRONTS TAKE HOME QUIZ
1. Most of the hurricanes that affect the east coast of the United States originally form over the A) warm waters of the Atlantic Ocean in summer B) warm land of the southeastern United States in summer
More informationAnticipation Guide #2
Weather Systems Anticipation Guide #2 Density differences in the atmosphere are responsible for redistributing earth s heat When air is heated it rises, cools and expands releasing energy mt air masses
More informationChapter 3: Weather Fronts & Storms
Chapter 3: Weather Fronts & Storms An AIR MASS is a large body of air that has similar characteristics (temperature, humidity) throughout. Air masses can be massively large. Air masses are classified by
More information20.1 Air Masses. Weather Patterns and Severe Storms. Four Types of Source Regions. Weather in North America Fronts
20.1 Air Masses Weather Patterns and Severe Storms Chapter 20 A huge body of air that has a uniform temperature and humidity. They move slowly, and take on the properties of their source regions. Four
More informationI. Air Masses A. Defined: large body of air, 1600 km or more across, with similar temperature and moisture at similar altitudes 1.
I. Air Masses A. Defined: large body of air, 1600 km or more across, with similar temperature and moisture at similar altitudes 1. Brings these characteristics with it as it moves to different areas 2.
More informationUnit 5 Part 2 Test PPT
Unit 5 Part 2 Test PPT Standard 1: Air Masses Air Mass An air mass is an immense body of air that is characterized by similar temperatures and amounts of moisture at any given altitude When an air mass
More informationWeather Atmospheric condition in one place during a limited period of time Climate Weather patterns that an area typically experiences over a long
Weather Atmospheric condition in one place during a limited period of time Climate Weather patterns that an area typically experiences over a long period of time Many factors influence weather & climate
More informationNovember 28, 2017 Day 1
November 28, 2017 Day 1 Air Masses & Fronts Teachers- please out the sheet (right) for the students to fill in as we go! Review: Clouds & Precipitation? What are the 4 different clouds? Status, Cumulus,
More information5. Which type of front is represented by letter X?
Name Weather Regents Review ased your answers to questions 1 through 4 on the four weather station models,,,, and D, below. D 82 012 56 999 78 978 32 002 62 75 24 1. List the letters of the four station
More informationCHAPTER 11 THUNDERSTORMS AND TORNADOES MULTIPLE CHOICE QUESTIONS
CHAPTER 11 THUNDERSTORMS AND TORNADOES MULTIPLE CHOICE QUESTIONS 1. A thunderstorm is considered to be a weather system. a. synoptic-scale b. micro-scale c. meso-scale 2. By convention, the mature stage
More informationWeather Atmospheric condition in one place during a limited period of time Climate Weather patterns that an area typically experiences over a long
Weather Atmospheric condition in one place during a limited period of time Climate Weather patterns that an area typically experiences over a long period of time Many factors influence weather & climate
More informationUse the terms from the following list to complete the sentences below. Each term may be used only once.
Skills Worksheet Directed Reading Section: Air Masses Use the terms from the following list to complete the sentences below. Each term may be used only once. high pressure poles low pressure equator wind
More informationFormation of Cold Airmasses Cold Air Outbreak
Chapter 14: Cold Waves Formation of Cold Airmasses Cold Air Outbreak 1 Cold Wave A cold wave is an influx of unusually cold air into middle or lower latitudes. Cold waves affect much larger areas than
More informationalso known as barometric pressure; weight of the air above the surface of the earth; measured by a barometer air pressure, high
Weather Vocabulary Vocabulary Term Meaning/Definition air mass * large bodies of air that have the similar properties throughout such as temperature, humidity, and air pressure; causes most of the weather
More informationQuiz 2 Review Questions
Quiz 2 Review Questions Chapter 7 Lectures: Winds and Global Winds and Global Winds cont 1) What is the thermal circulation (thermal wind) and how does it form? When we have this type of circulation, how
More informationCOMPOSITION OF THE ATMOSPHERE
Name Air COMPOSITION OF THE ATMOSPHERE 1. What are the two most abundant gases in the atmospherere? 2. Why do you think the percentage of water vapor in the air varies? 3. Would you classify carbon dioxide
More informationLecture 5: Atmospheric General Circulation and Climate
Lecture 5: Atmospheric General Circulation and Climate Geostrophic balance Zonal-mean circulation Transients and eddies Meridional energy transport Moist static energy Angular momentum balance Atmosphere
More information1 What Is Climate? TAKE A LOOK 2. Explain Why do areas near the equator tend to have high temperatures?
CHAPTER 17 1 What Is Climate? SECTION Climate BEFORE YOU READ After you read this section, you should be able to answer these questions: What is climate? What factors affect climate? How do climates differ
More information