TCs within Reanalyses: Evolving representation, trends, potential misuse, and intriguing questions
|
|
- Shana Matthews
- 5 years ago
- Views:
Transcription
1 TCs within Reanalyses: Evolving representation, trends, potential misuse, and intriguing questions Robert Hart Danielle Manning, Ryan Maue Florida State University Mike Fiorino National Hurricane Center 3 rd WCRP Intl Conference on Reanalysis: 30 January 2008
2 Strengths It has been noted several times here that the strengths of reanalyses lie in largescale This is even true in the tropics, where the reanalyses have the greatest challenge, as we have learned this week.
3 Gray Genesis Potential ERA-40 v OBS YGP = yearly genesis potential = low-level vort * vertical wind shear * convection Source: Dr. Michael Fiorino (NHC)
4 However What about the year-to-year variability Details, such as TCs themselves? Data changes: Satellites, ships, etc This raises a very fundamental question in reanalyses: How much of what we see is synthetic and how much of what we see is real? And this is particularly key to the TC question, in light of recent controversy.
5 Evidence of source data shift in analog pattern matching: If you match smoothed global mb thickness patterns, this is the DNA of matching. Source: Hart et al How much of this is data, and how much of this is actual climate shift?
6 Bifurcations in the 1970s exists in both ERA40, NCEP reanalyses Source: Hart et al. (2008), BAMS, in revision.
7 Motivation These issues naturally feed back upon the question of the representation of tropical cyclones (TCs) in the reanalyses. This is further begged by recent studies (e.g., Sriver and Huber 2006) which claimed that the reanalyses TC winds could be used as robust and independent measures for use in comparison to other TC trend studies (e.g. Emanuel 2005; Webster et al. 2005) This talk will first examine the evolving representation of TCs in reanalyses First step is to compare best-track (BT) TC representation to ERA40
8 ERA-40 TC detection v tropical wind score SHEM v NHEM ; tau=0 v tau=72 h Source: Dr. Michael Fiorino (NHC)
9 Data and Methodology Hurricane Floyd MSLP (contour) and 10m Wind (shaded)
10 Data and Methodology Hurricane Floyd Temperature anomaly from zonal mean ( C) 980mb mb mb 990mb Varying degrees of muted representation of TCs, depending on resolution, data input, assimilation type, physics.
11 Data and Methodology Using NHC BT as a guide, track all North Atlantic storms manually within the ERA40 data ERA40 MSLP minimum or 925mb vorticity maximum when MSLP minimum not present Could not use autotracker throughout b/c many storms were quite poorly resolved and had significant track differences from their BT counterparts Could not use BT tracks since ERA40 TC structure is subject of study
12 ERA40 TCs Position Difference from BT Not surprisingly, position comparison between ERA40 TC and BT TC is a strong function of distance from densest observational net.
13 ERA40 TCs Intensity Mean MSLP for Each SS Category MSLP ERA40 HURDAT SS Category Over a basin-scale perspective, and across the entire ERA40, the ERA40 TC intensity is uncorrelated to the BT intensity in the NATL.
14 ERA40 TCs Intensity Difference In the BT database, the mean TC intensity is shown to the left. In striking contrast, the ERA40 TC intensity is not well correlated, and in fact appears to represent a function more of age of the TC (existence within the reanalysis) than the actual intensity.
15 ERA40 TCs Intensity Correlation Intercomparison of the prior two figures leads to this figure, which illustrates that really only land is the ERA40 TC intensity well-correlated to the BT intensity.
16 Structural Comparison Need to move beyond just intensity and position, and analyze structural representation Will use the cyclone phase space (Hart 2003) to quantify the structural characteristics Specifically, how tropical are ERA40 TCs? How does this representation vary as a function of BT intensity, location, size, etc? Where and when is the ERA40 TC most correct?
17 ERA40 TCs Structure Source: Manning and Hart 2007
18 ERA40 TCs Structure
19 ERA40 TCs Structure: Zoom Source: Manning and Hart 2007
20 Impact of TC Size: Example Note: These are both Category 5 at these times in the best-track. 1961: Carla 1992: Andrew mb 981 mb
21 Impact of TC size With relatively coarse grid space, just how important is TC size? Use only TCs during the late period Data quality and density homogeneous Need size data from extended best track (1988 onward): DeMaria et al Bin by extended best-track size for the mean stormforce wind radius Very small (<83nm) Small (84-133nm) Large ( nm) Very large (>182nm)
22 Source: Manning and Hart 2007 Impact of TC size: Zoom Only when the storm becomes a sufficient size is intensity variability correctly captured. Beyond a certain size, additional size increase doesn t influence
23 Impact of TC Year MSLP Entire Period ( ) All storms SS Cat ERA40 cannot distinguish MSLP between Late some Period SS ( ) categories All storms In order to be used for SS trend Cat detection 2 it should be 3 able to distinguish 4 between 5 all SS categories 1 SS categories are large 2bins (15-20kt) so this criterion is rather generous 3 4 Source: Manning and Hart 2007 Not sig. Sig. to 95% conf. level Sig. to 99% conf. level
24 These results argue for an approach that JMA took with the JRA25 through the TC BT wind synthesis of Dr. M. Fiorino. However, this raises the question of ERA40 TC Representation Summary ERA40 TCs are nearly all tropical storm intensity at best Their quality of representation in the ERA40 is a far stronger function of TC size and location than actual intensity While ERA40 representation has improved markedly in the satellite era, the ERA40 is still unable to distinguish SS 1,2; SS2,4; SS3,4; SS3,5 TCs.
25 Potential red herrings? TC winds are largely a red herring in timeaccumulated measures where the time integral dominates the wind. Source: Maue and Hart 2007
26 global TC activity scaled ACE days global TC crash in 1999 Source: Dr. Michael Fiorino (NHC)
27 Caution and Care With the wealth of reanalysis data out there, it is easier than ever before to produce results Often these results can at first be thought to be independent confirmation of earlier results The great responsibility lies in looking at the details of the data and considering how much independence there really is, and how much of the signal is synthetic vs. real
28 Let s end with an intriguing question Dr. Kevin Trenberth on Monday (V1-221) showed improved estimates of the energy transport by the atmosphere and ocean using state of the art estimates from reanalyses and other sources Among these transports lies the role of tropical cyclones Despite the greatly muted TC representation, can reanalyses be used to indirectly extract the potential magnitude of the TC role in climate?
29 Active vs. Inactive Hemispheric TCs How does the winter following these anomalous TC seasons differ? Can the TC role in heat transport be implied through reanalyses?
30 Stationary Eddies Only [Long-term mean winter long-wave pattern] Following inactive recurving TC season Following active recurving TC season Source: Hart et al. 2007
31 Need to keep alert for other red Removing anomalous AO years herrings Removing anomalous ENSO years Removing anomalous NAO years Removing anomalous PNA years
32 Concluding Summary Reanalyses are clearly a powerful tool, and all powerful tools require both caution and responsibility to avoid misuse and red-herring attribution Reanalysis representation of NATL TCs over the past decades seemingly has been greatly effected by data availability : The size of an actual TC and its location is far, far more influential in reanalysis quality than its actual intensity (in the NATL)! Current reanalyses are raising many key climate questions Why has global TC activity been declining since the mid 1990s, and crashed in 1999 and 2007? Is the winter climate change following aggregate NH TC activity causation or correlation? Hopefully, future reanalyses will help answer these questions.
33 Concluding Summary References: Hart, R., R. Maue, and M. Watson, 2007: Estimating the atmospheric and SST memory of tropical cyclones through MPI anomaly evolution. Mon. Wea. Rev., 135, Manning, D, 2007: The utility of the ERA40 CPS in Trend Diagnosis and North Atlantic Tropical Cyclone Reanalysis. M.S. Thesis, Florida State University. Maue, R. and R. Hart, 2007: Comment on: "Low frequency variability in globally integrated tropical cyclone power dissipation." Geo. Res. Letters, 34, L11703, doi:1029/2006gl Manning, D. and R. E. Hart, 2007: Evolution of North Atlantic ERA40 Tropical Cyclone Representation. Geo. Res. Letters, 34, L doi: /2006gl Hart, R.,2003: A cyclone phase space derived from thermal wind and thermal asymmetry. Mon. Wea. Rev., 131,
PRMS WHITE PAPER 2014 NORTH ATLANTIC HURRICANE SEASON OUTLOOK. June RMS Event Response
PRMS WHITE PAPER 2014 NORTH ATLANTIC HURRICANE SEASON OUTLOOK June 2014 - RMS Event Response 2014 SEASON OUTLOOK The 2013 North Atlantic hurricane season saw the fewest hurricanes in the Atlantic Basin
More information2013 ATLANTIC HURRICANE SEASON OUTLOOK. June RMS Cat Response
2013 ATLANTIC HURRICANE SEASON OUTLOOK June 2013 - RMS Cat Response Season Outlook At the start of the 2013 Atlantic hurricane season, which officially runs from June 1 to November 30, seasonal forecasts
More informationTropical cyclones in ERA-40: A detection and tracking method
GEOPHYSICAL RESEARCH LETTERS, VOL. 35,, doi:10.1029/2008gl033880, 2008 Tropical cyclones in ERA-40: A detection and tracking method S. Kleppek, 1,2 V. Muccione, 3 C. C. Raible, 1,2 D. N. Bresch, 3 P. Koellner-Heck,
More informationThe feature of atmospheric circulation in the extremely warm winter 2006/2007
The feature of atmospheric circulation in the extremely warm winter 2006/2007 Hiroshi Hasegawa 1, Yayoi Harada 1, Hiroshi Nakamigawa 1, Atsushi Goto 1 1 Climate Prediction Division, Japan Meteorological
More informationHurricanes and Climate Change: Expectations versus Observations
Hurricanes and Climate Change: Expectations versus Observations 15 June, 2010 Lloyd s Market Academy Chris Landsea, National Hurricane Center, Miami, USA Chris.Landsea@noaa.gov How is global warming affecting:
More informationWhy the Atlantic was surprisingly quiet in 2013
1 Why the Atlantic was surprisingly quiet in 2013 by William Gray and Phil Klotzbach Preliminary Draft - March 2014 (Final draft by early June) ABSTRACT This paper discusses the causes of the unusual dearth
More informationComments by William M. Gray (Colorado State University) on the recently published paper in Science by Webster, et al
Comments by William M. Gray (Colorado State University) on the recently published paper in Science by Webster, et al., titled Changes in tropical cyclone number, duration, and intensity in a warming environment
More informationTropical Cyclones and Climate Change: Historical Trends and Future Projections
Tropical Cyclones and Climate Change: Historical Trends and Future Projections Thomas R. Knutson Geophysical Fluid Dynamics Laboratory / NOAA, Princeton, NJ U.S.A. IOGP/JCOMM/WCRP Workshop September 25-27,
More informationProspects for subseasonal forecast of Tropical Cyclone statistics with the CFS
Prospects for subseasonal forecast of Tropical Cyclone statistics with the CFS Augustin Vintzileos (1)(3), Tim Marchok (2), Hua-Lu Pan (3) and Stephen J. Lord (1) SAIC (2) GFDL (3) EMC/NCEP/NOAA During
More information16C.6 Genesis of Atlantic tropical storms from African Easterly Waves a comparison of two contrasting years
16C.6 Genesis of Atlantic tropical storms from African Easterly Waves a comparison of two contrasting years Susanna Hopsch 1 Department of Earth and Atmospheric Sciences, University at Albany, Albany,
More informationCOLORADO STATE UNIVERSITY FORECAST OF ATLANTIC HURRICANE ACTIVITY FROM AUGUST 16 29, 2018
COLORADO STATE UNIVERSITY FORECAST OF ATLANTIC HURRICANE ACTIVITY FROM AUGUST 16 29, 2018 We expect that the next two weeks will be characterized by below-normal amounts of hurricane activity. (as of 16
More informationAnnual Number of Peer Reviewed Articles with Hurricane or Tropical Cyclone in their Titles, according to Meteorological and Geoastrophysical
Hurricanes and Climate Kerry Emanuel Program in Atmospheres, Oceans, and Climate MIT Program Potential Intensity Role of potential ti li intensity it in storm intensity it Role of potential intensity in
More informationTROPICAL-EXTRATROPICAL INTERACTIONS
Notes of the tutorial lectures for the Natural Sciences part by Alice Grimm Fourth lecture TROPICAL-EXTRATROPICAL INTERACTIONS Anomalous tropical SST Anomalous convection Anomalous latent heat source Anomalous
More informationA Preliminary Climatology of Extratropical Transitions in the Southwest Indian Ocean
A Preliminary Climatology of Extratropical Transitions in the Southwest Indian Ocean Kyle S. Griffin Department of Atmospheric and Environmental Sciences, University at Albany, State University of New
More informationLow frequency variability in globally integrated tropical cyclone power dissipation
GEOPHYSICAL RESEARCH LETTERS, VOL. 33, L1175, doi:1.129/26gl26167, 26 Low frequency variability in globally integrated tropical cyclone power dissipation Ryan Sriver 1 and Matthew Huber 1 Received 27 February
More informationComments on: Increasing destructiveness of tropical cyclones over the past 30 years by Kerry Emanuel, Nature, 31 July 2005, Vol. 436, pp.
Comments on: Increasing destructiveness of tropical cyclones over the past 30 years by Kerry Emanuel, Nature, 31 July 2005, Vol. 436, pp. 686-688 William M. Gray Department of Atmospheric Science Colorado
More informationEvaluating a Genesis Potential Index with Community Climate System Model Version 3 (CCSM3) By: Kieran Bhatia
Evaluating a Genesis Potential Index with Community Climate System Model Version 3 (CCSM3) By: Kieran Bhatia I. Introduction To assess the impact of large-scale environmental conditions on tropical cyclone
More informationRMS Medium Term Perspective on Hurricane Activity
RMS Medium Term Perspective on Hurricane Activity Dr. Manuel Lonfat Florida Commission on Hurricane Loss Projection Methodology Workshop Tallahassee, July 27 2006 Agenda Multiyear autocorrelation of Atlantic,
More informationPossible Effects of Global Warming on Tropical Cyclone Activity
Possible Effects of Global Warming on Tropical Cyclone Activity Johnny Chan Guy Carpenter Asia-Pacific Climate Impact Centre School of Energy and Environment City University of Hong Kong Outline Background
More informationRecent Developments in Climate Information Services at JMA. Koichi Kurihara Climate Prediction Division, Japan Meteorological Agency
Recent Developments in Climate Information Services at JMA Koichi Kurihara Climate Prediction Division, Japan Meteorological Agency 1 Topics 1. Diagnosis of the Northern Hemispheric circulation in December
More informationThe Impact of air-sea interaction on the extratropical transition of tropical cyclones
The Impact of air-sea interaction on the extratropical transition of tropical cyclones Sarah Jones Institut für Meteorologie und Klimaforschung Universität Karlsruhe / Forschungszentrum Karlsruhe 1. Introduction
More informationGlobal Distribution and Associated Synoptic Climatology of Very Extreme Sea States (VESS)
Global Distribution and Associated Synoptic Climatology of Very Extreme Sea States (VESS) Vincent J. Cardone, Andrew T. Cox, Michael A. Morrone Oceanweather, Inc., Cos Cob, Connecticut Val R. Swail Environment
More informationNHC Ensemble/Probabilistic Guidance Products
NHC Ensemble/Probabilistic Guidance Products Michael Brennan NOAA/NWS/NCEP/NHC Mark DeMaria NESDIS/STAR HFIP Ensemble Product Development Workshop 21 April 2010 Boulder, CO 1 Current Ensemble/Probability
More informationWilliam M. Frank* and George S. Young The Pennsylvania State University, University Park, PA. 2. Data
1C.1 THE 80 CYCLONES MYTH William M. Frank* and George S. Young The Pennsylvania State University, University Park, PA 1. Introduction myth: A traditional story accepted as history and/or fact. For the
More informationForced and internal variability of tropical cyclone track density in the western North Pacific
Forced and internal variability of tropical cyclone track density in the western North Pacific Wei Mei 1 Shang-Ping Xie 1, Ming Zhao 2 & Yuqing Wang 3 Climate Variability and Change and Paleoclimate Working
More informationCOLORADO STATE UNIVERSITY FORECAST OF ATLANTIC HURRICANE ACTIVITY FROM AUGUST 18-31, 2017
COLORADO STATE UNIVERSITY FORECAST OF ATLANTIC HURRICANE ACTIVITY FROM AUGUST 18-31, 2017 We expect that the next two weeks will be characterized by above-average amounts (>130%) of activity relative to
More informationNOTES AND CORRESPONDENCE. What Has Changed the Proportion of Intense Hurricanes in the Last 30 Years?
1432 J O U R N A L O F C L I M A T E VOLUME 21 NOTES AND CORRESPONDENCE What Has Changed the Proportion of Intense Hurricanes in the Last 30 Years? LIGUANG WU Laboratory for Atmospheres, NASA Goddard Space
More informationHave a better understanding of the Tropical Cyclone Products generated at ECMWF
Objectives Have a better understanding of the Tropical Cyclone Products generated at ECMWF Learn about the recent developments in the forecast system and its impact on the Tropical Cyclone forecast Learn
More information1. Introduction. In following sections, a more detailed description of the methodology is provided, along with an overview of initial results.
7B.2 MODEL SIMULATED CHANGES IN TC INTENSITY DUE TO GLOBAL WARMING Kevin A. Hill*, Gary M. Lackmann, and A. Aiyyer North Carolina State University, Raleigh, North Carolina 1. Introduction The impact of
More informationCOLORADO STATE UNIVERSITY FORECAST OF ATLANTIC HURRICANE ACTIVITY FROM OCTOBER 13 OCTOBER 26, 2017
COLORADO STATE UNIVERSITY FORECAST OF ATLANTIC HURRICANE ACTIVITY FROM OCTOBER 13 OCTOBER 26, 2017 We expect that the next two weeks will be characterized by above-normal hurricane activity. (as of 13
More informationFORECAST OF ATLANTIC SEASONAL HURRICANE ACTIVITY AND LANDFALL STRIKE PROBABILITY FOR 2018
FORECAST OF ATLANTIC SEASONAL HURRICANE ACTIVITY AND LANDFALL STRIKE PROBABILITY FOR 2018 We have decreased our forecast and now believe that 2018 will have below-average activity. The tropical and subtropical
More informationTropical Cyclone Simulations in CAM5: The Impact of the Dynamical Core
Tropical Cyclone Simulations in CAM5: The Impact of the Dynamical Core Kevin A. Reed National Center for Atmospheric Research Julio Bacmeister, Cecile Hannay, Peter Lauritzen & John Truesdale NCAR Michael
More informationP Hurricane Danielle Tropical Cyclogenesis Forecasting Study Using the NCAR Advanced Research WRF Model
P1.2 2004 Hurricane Danielle Tropical Cyclogenesis Forecasting Study Using the NCAR Advanced Research WRF Model Nelsie A. Ramos* and Gregory Jenkins Howard University, Washington, DC 1. INTRODUCTION Presently,
More informationFernando Prates. Evaluation Section. Slide 1
Fernando Prates Evaluation Section Slide 1 Objectives Ø Have a better understanding of the Tropical Cyclone Products generated at ECMWF Ø Learn the recent developments in the forecast system and its impact
More informationSome figures courtesy of: Chris Landsea National Hurricane Center, Miami. Intergovernmental Panel on Climate Change
Hurricanes and Global Warming Pat Fitzpatrick Mississippi State University, GeoSystems Research Institute Some figures courtesy of: Chris Landsea National Hurricane Center, Miami Intergovernmental Panel
More informationSEASONAL CLIMATE FORECASTING TO BENEFIT BUSINESS AND SOCIETY
SEASONAL CLIMATE FORECASTING TO BENEFIT BUSINESS AND SOCIETY Dr Mark Saunders Head of Seasonal Forecasting Department of Space and Climate Physics University College London UCL Lunch Hour Lecture 13th
More informationThe 2005 North Atlantic Hurricane Season A Climate Perspective
The 2005 North Atlantic Hurricane Season A Climate Perspective Gerald Bell 1, Eric Blake 2, Chris Landsea 2, Kingtse Mo 1, Richard Pasch 2, Muthuvel Chelliah 1, Stanley Goldenberg 3 1 Climate Prediction
More informationHigh-Resolution MPAS Simulations for Analysis of Climate Change Effects on Weather Extremes
High-Resolution MPAS Simulations for Analysis of Climate Change Effects on Weather Extremes ALLISON MICHAELIS, GARY LACKMANN, & WALT ROBINSON Department of Marine, Earth, and Atmospheric Sciences, North
More informationThe 2009 Hurricane Season Overview
The 2009 Hurricane Season Overview Jae-Kyung Schemm Gerry Bell Climate Prediction Center NOAA/ NWS/ NCEP 1 Overview outline 1. Current status for the Atlantic, Eastern Pacific and Western Pacific basins
More informationTropical Cyclones in a regional climate change projections with RegCM4 over Central America CORDEX domain
Tropical Cyclones in a regional climate change projections with RegCM4 over Central America CORDEX domain Gulilat Tefera Diro diro@sca.uqam.ca Centre ESCER, University of Quebec at Montreal (UQAM), Montreal,
More informationUsing Flight Level Data to Improve Historical Tropical Cyclone Databases
Using Flight Level Data to Improve Historical Tropical Cyclone Databases Dr. Jonathan L. Vigh Shanghai Typhoon Institute 12 July 2018 NCAR is sponsored by the National Science Foundation On the Need for
More informationAn Assessment of Contemporary Global Reanalyses in the Polar Regions
An Assessment of Contemporary Global Reanalyses in the Polar Regions David H. Bromwich Polar Meteorology Group, Byrd Polar Research Center and Atmospheric Sciences Program, Department of Geography The
More informationTwenty-five years of Atlantic basin seasonal hurricane forecasts ( )
Click Here for Full Article GEOPHYSICAL RESEARCH LETTERS, VOL. 36, L09711, doi:10.1029/2009gl037580, 2009 Twenty-five years of Atlantic basin seasonal hurricane forecasts (1984 2008) Philip J. Klotzbach
More informationWest African Storm Tracks and Their Relationship to Atlantic Tropical Cyclones
2468 J O U R N A L O F C L I M A T E VOLUME 20 West African Storm Tracks and Their Relationship to Atlantic Tropical Cyclones SUSANNA B. HOPSCH AND CHRIS D. THORNCROFT Department of Earth and Atmospheric
More informationNOAA 2015 Updated Atlantic Hurricane Season Outlook
NOAA 2015 Updated Atlantic Hurricane Season Outlook Dr. Gerry Bell Lead Seasonal Forecaster Climate Prediction Center/ NOAA/ NWS Collaboration With National Hurricane Center/ NOAA/ NWS Hurricane Research
More informationAugust Forecast Update for Atlantic Hurricane Activity in 2016
August Forecast Update for Atlantic Hurricane Activity in 2016 Issued: 5 th August 2016 by Professor Mark Saunders and Dr Adam Lea Dept. of Space and Climate Physics, UCL (University College London), UK
More informationClimate Forecast Applications Network (CFAN)
Forecast of 2018 Atlantic Hurricane Activity April 5, 2018 Summary CFAN s inaugural April seasonal forecast for Atlantic tropical cyclone activity is based on systematic interactions among ENSO, stratospheric
More informationExtratropical transition of North Atlantic tropical cyclones in variable-resolution CAM5
Extratropical transition of North Atlantic tropical cyclones in variable-resolution CAM5 Diana Thatcher, Christiane Jablonowski University of Michigan Colin Zarzycki National Center for Atmospheric Research
More informationGlobal warming, U.S. hurricanes, and insured losses
Global warming, U.S. hurricanes, and insured losses Anticipating the hurricane peril in the United States American Meterological Society January 20-24, 2008 New Orleans James B. Elsner Florida State University
More information2016 Hurricane Season Preview
2016 Hurricane Season Preview Eric Uhlhorn, Ph.D. 1 2 Recap of 2015 Hurricane Season - El Niño played a significant role in activity - Atlantic activity was slightly below normal 11 named storms, 4 hurricanes,
More informationDynamical Statistical Seasonal Prediction of Atlantic Hurricane Activity at NCEP
Dynamical Statistical Seasonal Prediction of Atlantic Hurricane Activity at NCEP Hui Wang, Arun Kumar, Jae Kyung E. Schemm, and Lindsey Long NOAA/NWS/NCEP/Climate Prediction Center Fifth Session of North
More informationJuly Forecast Update for North Atlantic Hurricane Activity in 2018
July Forecast Update for North Atlantic Hurricane Activity in 2018 Issued: 5 th July 2018 by Professor Mark Saunders and Dr Adam Lea Dept. of Space and Climate Physics, UCL (University College London),
More informationSUPPLEMENTARY INFORMATION
Figure S1. Summary of the climatic responses to the Gulf Stream. On the offshore flank of the SST front (black dashed curve) of the Gulf Stream (green long arrow), surface wind convergence associated with
More informationVariations of Typhoon Activity in Asia - Global Warming and/or Natural Cycles?
Variations of Typhoon Activity in Asia - Global Warming and/or Natural Cycles? Johnny Chan Guy Carpenter Asia-Pacific Climate Impact Centre City University of Hong Kong Tropical Cyclones Affecting the
More informationCOLORADO STATE UNIVERSITY FORECAST OF ATLANTIC HURRICANE ACTIVITY FROM SEPTEMBER 27-OCTOBER 10, 2018
COLORADO STATE UNIVERSITY FORECAST OF ATLANTIC HURRICANE ACTIVITY FROM SEPTEMBER 27-OCTOBER 10, 2018 We expect that the next two weeks will be characterized by above-normal amounts of hurricane activity,
More informationThe Atlantic Hurricane Database Reanalysis Project
The Atlantic Hurricane Database Reanalysis Project 9 November, 2015 14 th International Workshop on Wave Hindcasting and Forecasting Chris Landsea, National Hurricane Center, Miami, USA Chris.Landsea@noaa.gov
More information4. Climatic changes. Past variability Future evolution
4. Climatic changes Past variability Future evolution TROPICAL CYCLONES and CLIMATE How TCs have varied during recent and distant past? How will TC activity vary in the future? 2 CURRENT CLIMATE : how
More informationAmajor concern about global warming is the
High-Frequency Variability in Hurricane Power Dissipation and Its Relationship to Global Temperature BY JAMES B. ELSNER, ANASTASIOS A. TSONIS, AND THOMAS H. JAGGER Results from a statistical analysis are
More informationGlobal Ocean Monitoring: A Synthesis of Atmospheric and Oceanic Analysis
Extended abstract for the 3 rd WCRP International Conference on Reanalysis held in Tokyo, Japan, on Jan. 28 Feb. 1, 2008 Global Ocean Monitoring: A Synthesis of Atmospheric and Oceanic Analysis Yan Xue,
More informationThe Track Integrated Kinetic Energy of Atlantic Tropical Cyclones
JULY 2013 M I S R A E T A L. 2383 The Track Integrated Kinetic Energy of Atlantic Tropical Cyclones V. MISRA Department of Earth, Ocean and Atmospheric Science, and Center for Ocean Atmospheric Prediction
More information2004 Hurricane Season: Climate Overview and Lessons Learned
2004 Hurricane Season: Climate Overview and Lessons Learned Mark Saunders, PhD (Presenter: Milan Simic,, PhD, Benfield) Lead Scientist, Tropical Storm Risk Benfield Hazard Research Centre University College
More informationAnuMS 2018 Atlantic Hurricane Season Forecast
AnuMS 2018 Atlantic Hurricane Season Forecast : June 11, 2018 by Dale C. S. Destin (follow @anumetservice) Director (Ag), Antigua and Barbuda Meteorological Service (ABMS) The *AnuMS (Antigua Met Service)
More informationImpacts of Climate Change on Autumn North Atlantic Wave Climate
Impacts of Climate Change on Autumn North Atlantic Wave Climate Will Perrie, Lanli Guo, Zhenxia Long, Bash Toulany Fisheries and Oceans Canada, Bedford Institute of Oceanography, Dartmouth, NS Abstract
More informationModelled and observed multi-decadal variability in the North Atlantic jet stream and its connection to Sea Surface Temperatures
Modelled and observed multi-decadal variability in the North Atlantic jet stream and its connection to Sea Surface Temperatures Isla Simpson 1 Clara Deser 1, Karen McKinnon 1, Elizabeth Barnes 2 1: Climate
More informationGenesis Parameters, Genesis Thresholds, and Mid-Level Humidity
Genesis Parameters, Genesis Thresholds, and Mid-Level Humidity Michael G. McGauley and David S. Nolan Rosenstiel School of Marine and Atmospheric Science University of Miami Miami, Florida, USA This work
More informationCLIMATE EXTREMES AND GLOBAL WARMING: A STATISTICIAN S PERSPECTIVE
CLIMATE EXTREMES AND GLOBAL WARMING: A STATISTICIAN S PERSPECTIVE Richard L. Smith Department of Statistics and Operations Research University of North Carolina, Chapel Hill rls@email.unc.edu Statistics
More informationSubtropical and Hybrid Systems IWTC VII Topic 1.6
Subtropical and Hybrid Systems IWTC VII Topic 1.6 John R. Gyakum Department of Atmospheric and Oceanic Sciences McGill University, Montreal Canada Working group: John L. Beven II, Lance F. Bosart, Fermin
More informationThe Interdecadal Variation of the Western Pacific Subtropical High as Measured by 500 hpa Eddy Geopotential Height
ATMOSPHERIC AND OCEANIC SCIENCE LETTERS, 2015, VOL. 8, NO. 6, 371 375 The Interdecadal Variation of the Western Pacific Subtropical High as Measured by 500 hpa Eddy Geopotential Height HUANG Yan-Yan and
More informationFORECAST OF ATLANTIC SEASONAL HURRICANE ACTIVITY AND LANDFALL STRIKE PROBABILITY FOR 2015
FORECAST OF ATLANTIC SEASONAL HURRICANE ACTIVITY AND LANDFALL STRIKE PROBABILITY FOR 2015 We continue to foresee a below-average 2015 Atlantic hurricane season. A moderate to strong El Niño is underway,
More informationClimate control of the global tropical storm days ( )
Click Here for Full Article GEOPHYSICAL RESEARCH LETTERS, VOL. 37,, doi:10.1029/2010gl042487, 2010 Climate control of the global tropical storm days (1965 2008) Bin Wang, 1,2 Yuxing Yang, 1 Qing Hua Ding,
More information2D.1 DETERMINATION OF A CONSISTENT TIME FOR THE EXTRATROPICAL TRANSITION OF TROPICAL CYCLONES
2D.1 DETERMINATION OF A CONSISTENT TIME FOR THE EXTRATROPICAL TRANSITION OF TROPICAL CYCLONES David E. Kofron*, Elizabeth A. Ritchie, and J. Scott Tyo University of Arizona, Tucson, Arizona 1. INTRODUCTION
More informationCharacteristics of Storm Tracks in JMA s Seasonal Forecast Model
Characteristics of Storm Tracks in JMA s Seasonal Forecast Model Akihiko Shimpo 1 1 Climate Prediction Division, Japan Meteorological Agency, Japan Correspondence: ashimpo@naps.kishou.go.jp INTRODUCTION
More informationAn inverse relationship between aggregate northern hemisphere tropical cyclone activity and subsequent winter climate
GEOPHYSICAL RESEARCH LETTERS, VOL. 38,, doi:10.1029/2010gl045612, 2011 An inverse relationship between aggregate northern hemisphere tropical cyclone activity and subsequent winter climate Robert E. Hart
More informationCOLORADO STATE UNIVERSITY FORECAST OF ATLANTIC HURRICANE ACTIVITY FROM SEPTEMBER 13-SEPTEMBER 26, 2018
COLORADO STATE UNIVERSITY FORECAST OF ATLANTIC HURRICANE ACTIVITY FROM SEPTEMBER 13-SEPTEMBER 26, 2018 We expect that the next two weeks will be characterized by near-normal amounts of hurricane activity.
More informationJuly Forecast Update for Atlantic Hurricane Activity in 2016
July Forecast Update for Atlantic Hurricane Activity in 2016 Issued: 5 th July 2016 by Professor Mark Saunders and Dr Adam Lea Dept. of Space and Climate Physics, UCL (University College London), UK Forecast
More informationHuracan: evil Taino & Mayan god of winds & destruction
Huracan: evil Taino & Mayan god of winds & destruction Profile of a Tropical Cyclone! Hurricane = typhoon = cyclone! All different words for the same thing Eye: clear area in the center Eyewall: clouds
More informationApril Forecast Update for North Atlantic Hurricane Activity in 2019
April Forecast Update for North Atlantic Hurricane Activity in 2019 Issued: 5 th April 2019 by Professor Mark Saunders and Dr Adam Lea Dept. of Space and Climate Physics, UCL (University College London),
More informationA pragmatic view of rates and clustering
North Building Atlantic the Chaucer Hurricane Brand A pragmatic view of rates and clustering North Atlantic Hurricane What we re going to talk about 1. Introduction; some assumptions and a basic view of
More informationTopic 3.2: Tropical Cyclone Variability on Seasonal Time Scales (Observations and Forecasting)
Topic 3.2: Tropical Cyclone Variability on Seasonal Time Scales (Observations and Forecasting) Phil Klotzbach 7 th International Workshop on Tropical Cyclones November 18, 2010 Working Group: Maritza Ballester
More informationAugust Forecast Update for Atlantic Hurricane Activity in 2012
August Forecast Update for Atlantic Hurricane Activity in 2012 Issued: 6 th August 2012 by Professor Mark Saunders and Dr Adam Lea Dept. of Space and Climate Physics, UCL (University College London), UK
More informationATMOSPHERIC MODELLING. GEOG/ENST 3331 Lecture 9 Ahrens: Chapter 13; A&B: Chapters 12 and 13
ATMOSPHERIC MODELLING GEOG/ENST 3331 Lecture 9 Ahrens: Chapter 13; A&B: Chapters 12 and 13 Agenda for February 3 Assignment 3: Due on Friday Lecture Outline Numerical modelling Long-range forecasts Oscillations
More informationA Hurricane Outlook for the 21st Century.
A Hurricane Outlook for the 21st Century. Hugh Willoughby Florida International University Cat Winds Effects One 74-95 mph No real damage to building structures. Two Three Four Five 96-110 mph 111-130
More informationAnuMS 2018 Atlantic Hurricane Season Forecast
AnuMS 2018 Atlantic Hurricane Season : August 12, 2018 by Dale C. S. Destin (follow @anumetservice) Director (Ag), Antigua and Barbuda Meteorological Service (ABMS) The *AnuMS (Antigua Met Service) is
More informationGlobal Warming, the AMO, and North Atlantic Tropical Cyclones
Global Warming, the AMO, and North Atlantic Tropical Cyclones revised for Eos 5/17/06 BY M.E. MANN AND K.A. EMANUEL Increases in key measures of Atlantic hurricane activity over recent decades are believed
More information28th Conference on Hurricanes and Tropical Meteorology, 28 April 2 May 2008, Orlando, Florida.
P2B. TROPICAL INTENSITY FORECASTING USING A SATELLITE-BASED TOTAL PRECIPITABLE WATER PRODUCT Mark DeMaria* NOAA/NESDIS/StAR, Fort Collins, CO Jeffery D. Hawkins Naval Research Laboratory, Monterey, CA
More informationAnuMS 2018 Atlantic Hurricane Season Forecast
AnuMS 2018 Atlantic Hurricane Season Forecast Issued: May 10, 2018 by Dale C. S. Destin (follow @anumetservice) Director (Ag), Antigua and Barbuda Meteorological Service (ABMS) The *AnuMS (Antigua Met
More informationAn Overview of Atmospheric Analyses and Reanalyses for Climate
An Overview of Atmospheric Analyses and Reanalyses for Climate Kevin E. Trenberth NCAR Boulder CO Analysis Data Assimilation merges observations & model predictions to provide a superior state estimate.
More informationApril Forecast Update for Atlantic Hurricane Activity in 2018
April Forecast Update for Atlantic Hurricane Activity in 2018 Issued: 5 th April 2018 by Professor Mark Saunders and Dr Adam Lea Dept. of Space and Climate Physics, UCL (University College London), UK
More informationFrancina Dominguez*, Praveen Kumar Department of Civil and Environmental Engineering University of Illinois at Urbana-Champaign
P1.8 MODES OF INTER-ANNUAL VARIABILITY OF ATMOSPHERIC MOISTURE FLUX TRANSPORT Francina Dominguez*, Praveen Kumar Department of Civil and Environmental Engineering University of Illinois at Urbana-Champaign
More informationPreliminary Assessment of 2017 Atlantic Hurricane Season. Phil Klotzbach. Department of Atmospheric Science. Phil Klotzbach
Atlantic Basin Basin Tropical Seasonal Cyclone Hurricane Climatology Prediction and Preliminary Assessment of 2017 Atlantic Hurricane Season Phil Klotzbach Department of Atmospheric Science Colorado Phil
More informationA Preliminary Exploration of the Upper Bound of Tropical Cyclone Intensification
A Preliminary Exploration of the Upper Bound of Tropical Cyclone Intensification Jonathan L. Vigh (NCAR/RAL) Kerry Emanuel (MIT) Mrinal K. Biswas (NCAR/RAL) Eric A. Hendricks (Naval Postgraduate School)
More informationTerminology. Meteorologists Care About. Saffir- Simpson Scale 11/19/12
Introduc8on to Climatology GEOGRAPHY 300 Terminology Tom Giambelluca University of Hawai i at Mānoa A generic term Tropical Cyclone Actually terms are basin dependent For US purposes 1. Depressions are
More informationExamination of Tropical Cyclogenesis using the High Temporal and Spatial Resolution JRA-25 Dataset
Examination of Tropical Cyclogenesis using the High Temporal and Spatial Resolution JRA-25 Dataset Masato Sugi Forecast Research Department, Meteorological Research Institute, Japan Correspondence: msugi@mri-jma.go.jp
More informationSIXTH INTERNATIONAL WORKSHOP on TROPICAL CYCLONES
WMO/CAS/WWW SIXTH INTERNATIONAL WORKSHOP on TROPICAL CYCLONES Topic 4a : Updated Statement on the Possible Effects of Climate Change on Tropical Cyclone Activity/Intensity Rapporteur: E-mail: John McBride
More informationInactive Period of Western North Pacific Tropical Cyclone Activity in
2614 J O U R N A L O F C L I M A T E VOLUME 26 Inactive Period of Western North Pacific Tropical Cyclone Activity in 1998 2011 KIN SIK LIU AND JOHNNY C. L. CHAN Guy Carpenter Asia-Pacific Climate Impact
More informationEnsemble Prediction Systems
Ensemble Prediction Systems Eric Blake National Hurricane Center 7 March 2017 Acknowledgements to Michael Brennan 1 Question 1 What are some current advantages of using single-model ensembles? A. Estimates
More informationTropical Cyclone Genesis: What we know, and what we don t!
Tropical Cyclone Genesis: What we know, and what we don t! Allison Wing! NSF Postdoctoral Research Fellow! Lamont-Doherty Earth Observatory! Columbia University! Overview! Climatology! What We Know! Theories!
More informationGPC Exeter forecast for winter Crown copyright Met Office
GPC Exeter forecast for winter 2015-2016 Global Seasonal Forecast System version 5 (GloSea5) ensemble prediction system the source for Met Office monthly and seasonal forecasts uses a coupled model (atmosphere
More informationTOWARDS A BETTER UNDERSTANDING OF AND ABILITY TO FORECAST THE WIND FIELD EXPANSION DURING THE EXTRATROPICAL TRANSITION PROCESS
P1.17 TOWARDS A BETTER UNDERSTANDING OF AND ABILITY TO FORECAST THE WIND FIELD EXPANSION DURING THE EXTRATROPICAL TRANSITION PROCESS Clark Evans* and Robert E. Hart Florida State University Department
More information4.3.2 Configuration. 4.3 Ensemble Prediction System Introduction
4.3 Ensemble Prediction System 4.3.1 Introduction JMA launched its operational ensemble prediction systems (EPSs) for one-month forecasting, one-week forecasting, and seasonal forecasting in March of 1996,
More information