Modulation of the Semiannual Oscillation Induced by Sudden Stratospheric Warming Events
|
|
- Samson Elliott
- 5 years ago
- Views:
Transcription
1 Tokyo, Japan 14/Oct/ Modulation of the Semiannual Oscillation Induced by Sudden Stratospheric Warming Events Toshihiko Hirooka¹, *Tsuyoshi Ohata¹, Nawo Eguchi² 1 DEPS, Kyushu Univ., Fukuoka, Japan 2 RIAM, Kyushu Univ., Kasuga, Japan
2 Contents of today s talk 2 1.Introduction 2.Data, Analysis methods 3.Analysis I: Overview of the equatorial middle atmosphere 4.Analysis II: Interannual changes of the SAO induced by SSWs 5.Conclusions
3 1. Introduction 3 Semi-Annual Oscillation : SAO Mesopause Middle Mesosphere Stratopause Motivation Driving sources of SAO: Kelvin waves, gravity waves, planetary waves, mean meridional advection Hirota(1978):Monthly mean zonal winds at Ascension Island(8S) <In this study> Aura EOS/MLS data up to 85 km are used for dynamical analyses Stratospheric Sudden warmings (SSWs) SAO amplification?
4 2. DATA, Analysis methods 4 Aura EOS/MLS data Version3.3 Level 2 data Analysis period 8 Aug Dec Variables Vertical Levels *Grid data Horizontal spacing Temperature, GPH 40 Levels( hPa: 11-85km) 5x5 degree-grid-spacing *original orbital data grid data: 3-day accumulation of orbital data Interpolate and moving average to longitudinal direction Zonal mean zonal winds Gradient wind approximation : Same as in CIRA1986 models (Fleming et al.,1990)
5 Comparison with reanalyses for 5 Climatological annual marches of at 1hPa for 1980 to 2010 in each reanalysis (color) and gradient winds on the basis of MLS (black) (by courtesy of Dr Kawatani) : well represented by the gradient wind approximation!
6 3. Analysis I: Overview of the equatorial middle atmosphere 6 Daily zonal winds at the EQ warm: Westerly cold: Easterly U EQ Middle Mesosphere Power Spectra of daily zonal winds at the EQ Stratopause QBO (m s )
7 Climatology of seasonal marches of and 7 (0.01hPa) (1hPa) NH winter SH winter Westerly Easterly *Error bars: standard deviations(σ) Westerly periods > Easterly periods σ of is larger than that of throughout the year Period averaged σ of NH winter (Dec Mar) : 12.4 m/s SH winter (Jun Sep) : 6.7 m/s SSWs interannual changes of SAO in NH winter
8 4. Analysis II: Interannual changes of the SAO induced by SSWs 8 Occurrence Calendar of SSWs(NH winter) Year\Month / / / / / / / / /13 Total Red:Major warmings 2 groups SSWs and SAO 1. SSWs in maximum period of SAO(Jan) 2. SSWs in transition period of SAO (Feb-Mar) Maximum Transition Westerly Easterly
9 Group1: SSWs in maximum period SAO (Jan) 9 Day 0 10hPa-80N SSW 10hPa-60N Westerly Easterly Matsuno and Nakamura(1979) F:Eliassen - Palm Flux U EQ Strong E ly of and W ly of SSW SAO amplifications? SSW *thin lines: climatology Composite analysis Day0: maximum
10 Temperature anomalies during SSWs based on composite analysis10 (hpa) Meridional structures of Temperature anomalies from Climatology Day -5 w c Day 0 Day 5 w c w c (km) Temperature anomalies in the equatorial region during SSWs Lower mesosphere : Warming Upper stratosphere : Cooling
11 Amplification mechanism for SAO 11 SSW Average over Day 0-5 W ly 0.01hPa W C C E ly C 1hPa S N Thermal wind balance : = On EQ W ly EQ NP
12 , anomalies from climatology at the EQ 12 T-Anom T SSW w Lower-mesosphere Warming c Upper-stratosphere Cooling U-Anom U EQ Thermal wind balance W ly W ly acceleration E ly E ly acceleration EQ (Contour:climatology) Blue:0.01hPa Red:1hPa SSW Note: anomalies > 2σ SAO Amplification
13 Response of SAO to different occurrence time of SSWs 13 During SSWs : W ly acceleration SSW : E ly acceleration SSW W ly E ly Maximum (Jan) Transition (Feb-Mar) SAO Amplification SAO Weakening
14 Major warming during SAO transition period 14 Time changes of and Major warmings in SAO transition period(feb-mar) Small zonal wind difference between and SSWs weaken SAO SSW thin lines: climatology
15 5. Conclusions 15 SAO and : out- of-phase Climatology of Seasonal marches : - sinusoidal change - non-sinusoidal change During SSWs Thermal wind balance on EQ W ly acceleration Occurrence Time of SSWs SSW SSW E ly acceleration Maximum (Jan) Transition (Feb-Mar) = SAO Amplification SAO Weakening
16 Thank you! 16
The stratospheric response to extratropical torques and its relationship with the annular mode
The stratospheric response to extratropical torques and its relationship with the annular mode Peter Watson 1, Lesley Gray 1,2 1. Atmospheric, Oceanic and Planetary Physics, Oxford University 2. National
More informationAGU Chapman Conference on The Role of the Stratosphere in Climate and Climate Change in Santorini, Greece, on 28th September, 2007
AGU Chapman Conference on The Role of the Stratosphere in Climate and Climate Change in Santorini, Greece, on 28th September, 2007 Parameter Sweep Experiments on the Remote Influences of the Equatorial
More informationStratospheric planetary wave reflection and its influence on the troposphere
Stratospheric planetary wave reflection and its influence on the troposphere N. Harnik, Tel Aviv University J. Perlwitz, CIRES U. Colorado/NOAA ESRL T. A. Shaw, Columbia University, NY, NY, USA The following
More informationAtmospheric Responses to Solar Wind Dynamic Pressure
Atmospheric Responses to Solar Wind Dynamic Pressure Hua Lu British Antarctic Survey Outline Background: Sun-Earth Climate Connection Solar wind/geomagnetic activity signals with 3 examples stratospheric
More informationEPP contribution to (stratospheric and) tropospheric variations. Annika Seppälä Finnish Meteorological Institute Academy of Finland
EPP contribution to (stratospheric and) tropospheric variations Annika Seppälä Finnish Meteorological Institute Academy of Finland A. Seppälä, HEPPA-SOLARIS Workshop, Boulder, Oct 0 So far... Energetic
More informationChihoko Yamashita 1,2, Han-Li Liu 1
1 1 Gravity Waves and the High-Resolution Modeling (Using ECMWF-T799) Chihoko Yamashita 1,2, Han-Li Liu 1 1. NCAR/HAO 2. University of Colorado at Boulder AWMG/WAWG Workshop 2012-02-01 Motivations Gravity
More informationPredictability of Sudden Stratospheric Warmings in sub-seasonal forecast models
Predictability of Sudden Stratospheric Warmings in sub-seasonal forecast models Alexey Karpechko Finnish Meteorological Institute with contributions from A. Charlton-Perez, N. Tyrrell, M. Balmaseda, F.
More informationSC-WACCM! and! Problems with Specifying the Ozone Hole
SC-WACCM! and! Problems with Specifying the Ozone Hole R. Neely III, K. Smith2, D. Marsh,L. Polvani2 NCAR, 2Columbia Thanks to: Mike Mills, Francis Vitt and Sean Santos Motivation To design a stratosphere-resolving
More informationLecture #2 Planetary Wave Models. Charles McLandress (Banff Summer School 7-13 May 2005)
Lecture #2 Planetary Wave Models Charles McLandress (Banff Summer School 7-13 May 2005) 1 Outline of Lecture 1. Observational motivation 2. Forced planetary waves in the stratosphere 3. Traveling planetary
More informationIntraseasonal Case Studies of the Annular Mode
Intraseasonal Case Studies of the Annular Mode Robert X. Black Brent A. McDaniel School of Earth and Atmospheric Sciences Georgia Institute of Technology, Atlanta, Georgia Comments Appreciated!! We are
More informationWACCM Studies at CU-Boulder
WACCM Studies at CU-Boulder V.L. Harvey, C.E. Randall, O.B. Toon, E. Peck, S. Benze, M. Brakebusch, L. Holt, D. Wheeler, J. France, E. Wolf, Y. Zhu, X. Fang, C. Jackman, M. Mills, D. Marsh Most Topics
More informationDynamical. regions during sudden stratospheric warming event (Case study of 2009 and 2013 event)
Dynamical Coupling between high and low latitude regions during sudden stratospheric warming event (Case study of 2009 and 2013 event) Vinay Kumar 1,S. K. Dhaka 1,R. K. Choudhary 2,Shu-Peng Ho 3,M. Takahashi
More informationNon-vertical propagation of gravity waves generated over the monsoon region and its effect on polar mesospheric clouds
Non-vertical propagation of gravity waves generated over the monsoon region and its effect on polar mesospheric clouds Brentha Thurairajah 1 David Siskind 2 Scott Bailey 1 Justin Carstens 1 1 Space@VT,
More informationTropical stratospheric zonal winds in ECMWF ERA-40 reanalysis, rocketsonde data, and rawinsonde data
GEOPHYSICAL RESEARCH LETTERS, VOL. 32, L09806, doi:10.1029/2004gl022328, 2005 Tropical stratospheric zonal winds in ECMWF ERA-40 reanalysis, rocketsonde data, and rawinsonde data Mark P. Baldwin Northwest
More informationInfluences of the 11-year sunspot cycle on the stratosphere and the importance of the QBO
Influences of the 11-year sunspot cycle on the stratosphere and the importance of the QBO Karin Labitzke, Institute for Meteorology, F.U. Berlin Germany (Labitzke and van Loon, numerous papers, 1987 2006)
More informationLinkages between Arctic sea ice loss and midlatitude
Linkages between Arctic sea ice loss and midlatitude weather patterns Response of the wintertime atmospheric circulation to current and projected Arctic sea ice decline Gudrun Magnusdottir and Yannick
More informationIntroduction to Climate ~ Part I ~
2015/11/16 TCC Seminar JMA Introduction to Climate ~ Part I ~ Shuhei MAEDA (MRI/JMA) Climate Research Department Meteorological Research Institute (MRI/JMA) 1 Outline of the lecture 1. Climate System (
More informationBlockings and Upward Planetary-Wave propagation into the stratosphere
Blockings and Upward Planetary-Wave propagation into the stratosphere *Kazuaki Nishii, Hisashi Nakamura (RCAST, University of Tokyo) Yvan J. Orsolini (NILU) SPARC 2014 GA, 14 th January, Tuesday, 18:00-18:15
More informationEffect of Sudden Stratospheric Warmings on Subseasonal Prediction Skill in the NASA S2S Forecast System
Effect of Sudden Stratospheric Warmings on Subseasonal Prediction Skill in the NASA S2S Forecast System M. Joan Alexander 1, Lawrence Coy 2, Laura Holt 1, Zhao Li 3, Andrea Molod 3, and Steven Pawson 3
More informationChange in Occurrence Frequency of Stratospheric Sudden Warmings. with ENSO-like SST Forcing as Simulated WACCM
Change in Occurrence Frequency of Stratospheric Sudden Warmings with ENSO-like SST Forcing as Simulated WACCM Masakazu Taguchi* and Dennis L. Hartmann Department of Atmospheric Sciences, University of
More informationAnalysis of Ultra-fast Kelvin Waves Simulated by the Kyushu University GCM
Analysis of Ultra-fast Kelvin Waves Simulated by the Kyushu University GCM Ying-Wen Chen and Saburo Miyahara Department of Earth and Planetary Sciences, Kyushu University, Japan 1. Introduction Equatorial
More informationModeling the Downward Influence of Stratospheric Final Warming events
Modeling the Downward Influence of Stratospheric Final Warming events Lantao Sun Department of Atmospheric Sciences, University of Illinois at Urbana-Champaign Walter A. Robinson Division of Atmospheric
More informationThe Impact of the Extratropical Transition of Typhoon Dale (1996) on the Early Wintertime Stratospheric Circulation
The Impact of the Extratropical Transition of Typhoon Dale (1996) on the Early 1996-97 Wintertime Stratospheric Circulation Andrea L. Lang 1, Jason M. Cordeira 2, Lance F. Bosart 1 and Daniel Keyser 1
More informationThe Quasi-Biennial Oscillation Analysis of the Resolved Wave Forcing
The Quasi-Biennial Oscillation Analysis of the Resolved Wave Forcing Thomas Krismer, Marco Giorgetta Max Planck Institute for Meteorology Hamburg Introduction 1) The Quasi Biennial Oscillation is driven
More informationElevated stratopause and mesospheric intrusion following a stratospheric sudden warming in WACCM
Elevated stratopause and mesospheric intrusion following a stratospheric sudden warming in WACCM Yvan J. Orsolini 1,V. Limpasuvan 2, J. Richter 3, O. K. Kvissel 4, F. Stordal 4,D. Marsh 3 1 Norwegian Institute
More informationStratospheric Predictability and the Arctic Polar-night Jet Oscillation
Stratospheric Predictability and the Arctic Polar-night Jet Oscillation Peter Hitchcock1, Ted Shepherd2 University of Toronto Now at Cambridge 2Now at Reading 1 Gloria Manney JPL, NMT, Now at NWRA NAM
More informationHigh initial time sensitivity of medium range forecasting observed for a stratospheric sudden warming
GEOPHYSICAL RESEARCH LETTERS, VOL. 37,, doi:10.1029/2010gl044119, 2010 High initial time sensitivity of medium range forecasting observed for a stratospheric sudden warming Yuhji Kuroda 1 Received 27 May
More informationSteven Feldstein. The link between tropical convection and the Arctic warming on intraseaonal and interdecadal time scales
The link between tropical convection and the Arctic warming on intraseaonal and interdecadal time scales Steven Feldstein The Pennsylvania State University Collaborators: Sukyoung Lee, Hyoseok Park, Tingting
More informationMicrowave Limb Sounder Observations of Polar Middle Atmosphere: Decadal and Inter-annual Variability
Microwave Limb Sounder Observations of Polar Middle Atmosphere: Decadal and Inter-annual Variability Jae N. Lee 1, Dong L. Wu 2, Alexander ozone Ruzmaikin 1, Gloria J. Manney 1, and Sultan Hameed 4 1.
More informationparticular regional weather extremes
SUPPLEMENTARY INFORMATION DOI: 1.138/NCLIMATE2271 Amplified mid-latitude planetary waves favour particular regional weather extremes particular regional weather extremes James A Screen and Ian Simmonds
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 informationStratosphere-Troposphere Interaction and Long Range Prediction
Stratosphere-Troposphere Interaction and Long Range Prediction Adam Scaife Head Monthly to Decadal Prediction Met Office, UK Outline Stratosphere-Troposphere interaction: Monthly Seasonal Multiannual Longer
More informationLecture #3: Gravity Waves in GCMs. Charles McLandress (Banff Summer School 7-13 May 2005)
Lecture #3: Gravity Waves in GCMs Charles McLandress (Banff Summer School 7-13 May 2005) 1 Outline of Lecture 1. Role of GWs in the middle atmosphere 2. Background theory 3. Resolved GWs in GCMs 4. Parameterized
More informationENSO Outlook by JMA. Hiroyuki Sugimoto. El Niño Monitoring and Prediction Group Climate Prediction Division Japan Meteorological Agency
ENSO Outlook by JMA Hiroyuki Sugimoto El Niño Monitoring and Prediction Group Climate Prediction Division Outline 1. ENSO impacts on the climate 2. Current Conditions 3. Prediction by JMA/MRI-CGCM 4. Summary
More informationSolar cycle signal in a general circulation and chemistry model with internally generated quasi biennial oscillation
Click Here for Full Article JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 115,, doi:10.1029/2009jd012542, 2010 Solar cycle signal in a general circulation and chemistry model with internally generated quasi biennial
More informationOn the QBO-Solar-Relationship throughout the Year
On the QBO-Solar-Relationship throughout the Year Karin Labitzke, Institut für Meteorologie, Freie Universität Berlin SORC-Sedona-Sep-2011.ppt Today, I want to tell you about the importance of the QBO
More informationHEIGHT-LATITUDE STRUCTURE OF PLANETARY WAVES IN THE STRATOSPHERE AND TROPOSPHERE. V. Guryanov, A. Fahrutdinova, S. Yurtaeva
HEIGHT-LATITUDE STRUCTURE OF PLANETARY WAVES IN THE STRATOSPHERE AND TROPOSPHERE INTRODUCTION V. Guryanov, A. Fahrutdinova, S. Yurtaeva Kazan State University, Kazan, Russia When constructing empirical
More informationLecture #1 Tidal Models. Charles McLandress (Banff Summer School 7-13 May 2005)
Lecture #1 Tidal Models Charles McLandress (Banff Summer School 7-13 May 2005) 1 Outline of Lecture 1. Introduction 2. Brief description of tides 3. Observations of tides 4. Simulating tides using a general
More informationVertical Structure of Atmosphere
ATMOS 3110 Introduction to Atmospheric Sciences Distribution of atmospheric mass and gaseous constituents Because of the earth s gravitational field, the atmosphere exerts a downward forces on the earth
More informationUsing gravity wave parameteriza1ons to address WACCM discrepancies
Using gravity wave parameteriza1ons to address WACCM discrepancies A. K. Smith, J. H. Richter, R. R. Garcia, and WACCM team NCAR* * NCAR is sponsored by the Na1onal Science Founda1on focus on the tropics
More informationWhat kind of stratospheric sudden warming propagates to the troposphere?
What kind of stratospheric sudden warming propagates to the troposphere? Ken I. Nakagawa 1, and Koji Yamazaki 2 1 Sapporo District Meteorological Observatory, Japan Meteorological Agency Kita-2, Nishi-18,
More informationCoupling of the polar stratosphere and mesosphere during stratospheric sudden warmings - Relevance for solar-terrestrial coupling -
Coupling of the polar stratosphere and mesosphere during stratospheric sudden warmings - Relevance for solar-terrestrial coupling - Yvan J. Orsolini NILU - Norwegian Institute for Air Research and Birkeland
More informationDynamics of the middle atmosphere at low, mid and high latitudes observed by the microwave wind radiometer WIRA
Dynamics of the middle atmosphere at low, mid and high latitudes observed by the microwave wind radiometer WIRA Rolf Rüfenacht, Niklaus Kämpfer, Klemens Hocke, Ansgar Schanz Institute of Applied Physics,
More informationInterannual Variations of the General Circulation and Polar Stratospheric Ozone Losses in a General Circulation Model
Journal of the Meteorological Society of Japan, Vol. 80, No. 4B, pp. 877--895, 2002 877 Interannual Variations of the General Circulation and Polar Stratospheric Ozone Losses in a General Circulation Model
More informationVariability and trend of the heat balance in the southeast Indian Ocean
Variability and trend of the heat balance in the southeast Indian Ocean Ming Feng, CSIRO Marine & Atmospheric Research Arne Biastoch, Claus Böning, Leibniz-Institut für Meeresforschung Nick Caputi, Department
More informationGeneral Circulation of the Stratosphere and modelisation
a) Basic climatologies b) Interpretation of the dynamics with a heuristic model c) Brewer Dobson circulation d) Middle latitudes dynamics Stratospheric sudden warmings e) Equatorial dynamics Semi annual
More informationDevelopment of a Coupled Atmosphere-Ocean-Land General Circulation Model (GCM) at the Frontier Research Center for Global Change
Chapter 1 Atmospheric and Oceanic Simulation Development of a Coupled Atmosphere-Ocean-Land General Circulation Model (GCM) at the Frontier Research Center for Global Change Project Representative Tatsushi
More information2015/16 Winter Monsoon in East Asia
8 Apr 2016, FOCRAII-12, Guangzhou, China 2015/16 Winter Monsoon in East Asia Hirotaka SATO Tokyo Climate Center Japan Meteorological Agency 1 Outline 1. Overview of 2015/16 winter monsoon in East Asia
More informationWACCM: The High-Top Model
WACCM: The High-Top Model WACCM top Michael Mills CAM top WACCM Liaison mmills@ucar.edu (303) 497-1425 http://bb.cgd.ucar.edu/ 40 km Ozone Layer Jarvis, Bridging the Atmospheric Divide, Science, 293, 2218,
More informationComparing QBO and ENSO impacts on stratospheric transport in WACCM-SD and -FR
Comparing QBO and ENSO impacts on stratospheric transport in WACCM-SD and -FR Multivariate ENSO Index + QBO shear index based on Singapore wind U50-U25 CESM Chemistry WG Meeting Boulder, CO February 10,
More informationTemperature changes in the tropical tropopause layer
Temperature changes in the tropical tropopause layer Kohei Yoshida Division of Earth System Science, Graduate School of Environmental Science, Hokkaido University February 011 Abstract ⅰ Abstract Temperature
More informationInvestigate the influence of the Amazon rainfall on westerly wind anomalies and the 2002 Atlantic Nino using QuikScat, Altimeter and TRMM data
Investigate the influence of the Amazon rainfall on westerly wind anomalies and the 2002 Atlantic Nino using QuikScat, Altimeter and TRMM data Rong Fu 1, Mike Young 1, Hui Wang 2, Weiqing Han 3 1 School
More informationDevelopment of a High-Resolution Coupled Atmosphere-Ocean-Land General Circulation Model for Climate System Studies
Chapter Earth Science Development of a High-Resolution Coupled Atmosphere-Ocean-Land General Circulation Model for Climate System Studies Project Representative Akira Noda Frontier Research Center for
More informationFree and convectively coupled equatorial waves diagnosis using 3-D Normal Modes
Free and convectively coupled equatorial waves diagnosis using 3-D Normal Modes Carlos A. F. Marques and J.M. Castanheira CESAM & Department of Physics University of Aveiro Portugal MODES Workshop - Boulder
More informationPredictability of the Stratospheric Polar Vortex Breakdown
International Symposium on the Whole Atmosphere (ISWA) Session 4: Sudden stratospheric warming and SSW-initiated global coupling 14 September 2016 @ Ito Hall, The University of Tokyo Predictability of
More informationRelation between the 100 hpa heat flux. and stratospheric potential vorticity. Yvonne B. L. Hinssen. Maarten H. P. Ambaum
Generated using version 3.0 of the official AMS L A TEX template Relation between the 100 hpa heat flux and stratospheric potential vorticity Yvonne B. L. Hinssen Institute for Marine and Atmospheric research
More informationAtmospheric Coupling via Energetic Particle Precipitation (EPP)
Atmospheric Coupling via Energetic Particle Precipitation (EPP) Cora E. Randall University of Colorado Laboratory for Atmospheric and Space Physics Department of Atmospheric and Oceanic Sciences Acknowledgments
More informationof Stratospheric Sudden Warming
13 Hindcast AGCM Experiments on the Predictability of Stratospheric Sudden Warming Hitoshi Mukougawa 1, Toshihiko Hirooka 2, Tomoko Ichimaru 3 and Yuhji Kuroda 4 1 Kyoto University, Disaster Prevention
More informationGlobal Ocean Monitoring: Recent Evolution, Current Status, and Predictions
Global Ocean Monitoring: Recent Evolution, Current Status, and Predictions Prepared by Climate Prediction Center, NCEP November 6, 2009 http://www.cpc.ncep.noaa.gov/products/godas/ This project to deliver
More informationNORTH ATLANTIC DECADAL-TO- MULTIDECADAL VARIABILITY - MECHANISMS AND PREDICTABILITY
NORTH ATLANTIC DECADAL-TO- MULTIDECADAL VARIABILITY - MECHANISMS AND PREDICTABILITY Noel Keenlyside Geophysical Institute, University of Bergen Jin Ba, Jennifer Mecking, and Nour-Eddine Omrani NTU International
More informationGAMINGRE 8/1/ of 7
FYE 09/30/92 JULY 92 0.00 254,550.00 0.00 0 0 0 0 0 0 0 0 0 254,550.00 0.00 0.00 0.00 0.00 254,550.00 AUG 10,616,710.31 5,299.95 845,656.83 84,565.68 61,084.86 23,480.82 339,734.73 135,893.89 67,946.95
More informationVertical and interhemispheric links in the stratosphere-mesosphere as revealed by the day-to-day variability of Aura-MLS temperature data
Author(s) 2009. This work is distributed under the Creative Commons Attribution 3.0 License. Annales Geophysicae Vertical and interhemispheric links in the stratosphere-mesosphere as revealed by the day-to-day
More informationImpact of the 2002 stratospheric warming in the southern hemisphere on the tropical cirrus clouds and convective activity
The Third International SOWER meeting,, Lake Shikotsu,, July 18-20, 2006 1 Impact of the 2002 stratospheric warming in the southern hemisphere on the tropical cirrus clouds and convective activity Eguchi,
More informationFuture changes in Elevated Stratopause Events
Future changes in Elevated Stratopause Events Janice Scheffler 1, Ulrike Langematz 1, Yvan J. Orsolini 2, Blanca Ayarzagüena 1 1 Institut für Meteorologie, Freie Universität Berlin 2 Norwegian Institute
More informationThe exceptional Arctic winter 2005/06
SPARC data assimilation workshop, 2-4 October 2006 The exceptional Arctic winter 2005/06 An example to investigate polar processes using different assimilations systems 1, Gloria Manney 2,3, Steven Pawson
More information1. Introduction. 2. Verification of the 2010 forecasts. Research Brief 2011/ February 2011
Research Brief 2011/01 Verification of Forecasts of Tropical Cyclone Activity over the Western North Pacific and Number of Tropical Cyclones Making Landfall in South China and the Korea and Japan region
More informationDominant Anomaly Patterns in the Near-Surface Baroclinicity and. Accompanying Anomalies in the Atmosphere and Oceans. Part II: North.
1 Dominant Anomaly Patterns in the Near-Surface Baroclinicity and 2 Accompanying Anomalies in the Atmosphere and Oceans. Part II: North 3 Pacific Basin 4 Mototaka Nakamura and Shozo Yamane 5 Japan Agency
More informationEl Niño, South American Monsoon, and Atlantic Niño links as detected by a. TOPEX/Jason Observations
El Niño, South American Monsoon, and Atlantic Niño links as detected by a decade of QuikSCAT, TRMM and TOPEX/Jason Observations Rong Fu 1, Lei Huang 1, Hui Wang 2, Paola Arias 1 1 Jackson School of Geosciences,
More informationUpward Transport of Westerly Momentum due to Disturbances of the. Equatorial Lower Stratosphere in the Period Range of about 2 Days
June 1994 T. Maruyama 423 Upward Transport of Westerly Momentum due to Disturbances of the Equatorial Lower Stratosphere in the Period Range of about 2 Days -A Singapore Data Analysis for 1983-1993 By
More informationCHAPTER 5. Low latitude temperature change in the stratosphere and mesosphere. relation to Sudden Stratospheric Warming (SSW)
CHAPTER 5 Low latitude temperature change in the stratosphere and mesosphere relation to Sudden Stratospheric Warming (SSW) 5.1 Introduction To understand middle atmosphere dynamics, the basic thermal
More informationThe Global Monsoon Response to Volcanic Eruptions in the CMIP5 Past1000 Simulations and Model Simulations of FGOALS
The Global Monsoon Response to Volcanic Eruptions in the CMIP5 Past1000 Simulations and Model Simulations of FGOALS Wenmin Man, Tianjun Zhou Email: manwenmin@mail.iap.ac.cn PAGES2k-PMIP3 Hydroclimate Workshop,
More informationInfluence of Doubled CO 2 on Ozone via Changes in the Brewer Dobson Circulation
JULY 2007 N O T E S A N D C O R R E S P O N D E N C E 2751 Influence of Doubled CO 2 on Ozone via Changes in the Brewer Dobson Circulation XUN JIANG Division of Geological and Planetary Sciences, and Department
More informationSouth Eastern Australian Rainfall in relation to the Mean Meridional Circulation
South Eastern Australian Rainfall in relation to the Mean Meridional Circulation Bertrand Timbal, Hanh Nguyen, Robert Fawcett, Wasyl Drosdowsky and Chris Lucas CAWCR / Bureau of Meteorology Long-term SEA
More information3. Midlatitude Storm Tracks and the North Atlantic Oscillation
3. Midlatitude Storm Tracks and the North Atlantic Oscillation Copyright 2006 Emily Shuckburgh, University of Cambridge. Not to be quoted or reproduced without permission. EFS 3/1 Review of key results
More informationBenguela Niño/Niña events and their connection with southern Africa rainfall have been documented before. They involve a weakening of the trade winds
Benguela Niño/Niña events and their connection with southern Africa rainfall have been documented before. They involve a weakening of the trade winds in the equatorial western Atlantic in the early monsoon,
More informationOn the Control of the Residual Circulation and Stratospheric Temperatures in the Arctic by Planetary Wave Coupling
JANUARY 2014 S H A W A N D P E R L W I T Z 195 On the Control of the Residual Circulation and Stratospheric Temperatures in the Arctic by Planetary Wave Coupling TIFFANY A. SHAW Department of Earth and
More informationDynamics of the mesosphere during sudden stratospheric warmings
Dynamics of the mesosphere during sudden stratospheric warmings Christoph Zülicke & Erich Becker (Leibniz Institute of Atmospheric Physics, Kühlungsborn, Germany) in cooperation with Peter Hoffmann & Vivian
More informationClimatology and ENSO-related interannual variability of. gravity waves in the southern hemisphere subtropical
SATO ET AL: ENSO-MODULATED GRAVITY WAVES 1 1 2 3 Climatology and ENSO-related interannual variability of gravity waves in the southern hemisphere subtropical stratosphere revealed by high-resolution AIRS
More informationP4.2 THE THREE DIMENSIONAL STRUCTURE AND TIME EVOLUTION OF THE DECADAL VARIABILITY REVEALED IN ECMWF REANALYSES
P4.2 THE THREE DIMENSIONAL STRUCTURE AND TIME EVOLUTION OF THE DECADAL VARIABILITY REVEALED IN ECMWF REANALYSES Taehyoun Shim 1, Gyu-Ho Lim* 1 and Dong-In Lee 2 1 School of Earth and Environmental Sciences,
More informationEvidence Linking Arctic Amplification with Changing Weather Patterns in Mid-Latitudes
Evidence Linking Arctic Amplification with Changing Weather Patterns in Mid-Latitudes Jennifer Francis Institute of Marine and Coastal Sciences Rutgers, the State University of New Jersey Steve Vavrus
More informationFrom El Nino to Atlantic Nino: pathways as seen in the QuikScat winds
From El Nino to Atlantic Nino: pathways as seen in the QuikScat winds Rong Fu 1, Lei Huang 1, Hui Wang 2 Presented by Nicole Smith-Downey 1 1 Jackson School of Geosciences, The University of Texas at Austin
More informationThe JRA-55 Reanalysis: quality control and reprocessing of observational data
The JRA-55 Reanalysis: quality control and reprocessing of observational data Kazutoshi Onogi On behalf of JRA group Japan Meteorological Agency 29 October 2014 EASCOF 1 1. Introduction 1. Introduction
More information11-year solar cycle Mechanisms and Modelling in the Stratosphere and Troposphere
11-year solar cycle Mechanisms and Modelling in the Stratosphere and Troposphere Lesley Gray University of Reading U.K. 1. Overview of Gray et al. 2010, Solar Influence on Climate, Rev. Geophys. (in press).
More informationJOURNAL OF GEOPHYSICAL RESEARCH, VOL. 110, D18303, doi: /2004jd005424, 2005
JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 110,, doi:10.1029/2004jd005424, 2005 Kelvin waves and ozone Kelvin waves in the quasi-biennial oscillation and semiannual oscillation: A simulation by a high-resolution
More informationA new pathway for communicating the 11-year solar cycle signal to the QBO
GEOPHYSICAL RESEARCH LETTERS, VOL. 32, L18805, doi:10.1029/2005gl023696, 2005 A new pathway for communicating the 11-year solar cycle signal to the QBO Eugene C. Cordero Department of Meteorology, San
More informationCharacteristics of the QBO- Stratospheric Polar Vortex Connection on Multi-decadal Time Scales?
Characteristics of the QBO- Stratospheric Polar Vortex Connection on Multi-decadal Time Scales? Judith Perlwitz, Lantao Sun and John Albers NOAA ESRL Physical Sciences Division and CIRES/CU Yaga Richter
More informationThe Arctic polar troposphere, stratosphere and mesosphere during IPY
The Arctic polar troposphere, stratosphere and mesosphere during IPY V. Lynn Harvey, R. Collins, D. Atkinson, B. Thurairajah, D. Wheeler km 70 60 stratopause 50 40 30 20 10 tropopause Outline Motivation:
More informationInteractions Between the Stratosphere and Troposphere
Interactions Between the Stratosphere and Troposphere A personal perspective Scott Osprey Courtesy of Verena Schenzinger The Wave-Driven Circulation Global structure of Temperature and Wind Temperature
More informationMeteor-radar observed mesospheric semi-annual oscillation (SAO) and quasi-biennial oscillation (QBO) over Maui, Hawaii
Embry-Riddle Aeronautical University From the SelectedWorks of Alan Z Liu March 14, 2012 Meteor-radar observed mesospheric semi-annual oscillation (SAO) and quasi-biennial oscillation (QBO) over Maui,
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 informationDownward propagation from the stratosphere to the troposphere: A comparison of the two hemispheres
JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 108, NO. D24, 4780, doi:10.1029/2003jd004077, 2003 Downward propagation from the stratosphere to the troposphere: A comparison of the two hemispheres Rune G. Graversen
More informationENSO Cycle: Recent Evolution, Current Status and Predictions. Update prepared by Climate Prediction Center / NCEP 5 August 2013
ENSO Cycle: Recent Evolution, Current Status and Predictions Update prepared by Climate Prediction Center / NCEP 5 August 2013 Outline Overview Recent Evolution and Current Conditions Oceanic Niño Index
More informationA reanalysis for the seasonal and longer-period cycles and the trends in middle-atmosphere temperature from the Halogen Occultation Experiment
JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 112,, doi:10.1029/2006jd007489, 2007 A reanalysis for the seasonal and longer-period cycles and the trends in middle-atmosphere temperature from the Halogen Occultation
More informationFour ways of inferring the MMC. 1. direct measurement of [v] 2. vorticity balance. 3. total energy balance
Four ways of inferring the MMC 1. direct measurement of [v] 2. vorticity balance 3. total energy balance 4. eliminating time derivatives in governing equations Four ways of inferring the MMC 1. direct
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 informationFuture changes in wintertime stratospheric Arctic variability in CCMI models
Future changes in wintertime stratospheric Arctic variability in CCMI models B. Ayarzagüena 1, U. Langematz 1, J. Abalichin 1, H. Akiyoshi 2, M. Michou 3, O. Morgenstern 4 & L. Oman 5 1 Institut für Meteorologie,
More informationRecent Development of CCSR/NIES AGCM for Venus Atmospheric Sciences
Chapman conference: Venus Feb. 14, 2006 Recent Development of CCSR/NIES AGCM for Venus Atmospheric Sciences Masaaki TAKAHASHI (CCSR, Univ. of Tokyo) Masaru YAMAMOTO (RIAM, Kyushu Univ.) An observationally
More information7 The Quasi-Biennial Oscillation (QBO)
7 The Quasi-Biennial Oscillation (QBO) (Reviewed by Baldwin et al., Rev. Geophys., 001) Previously we noted the remarkable quasi-periodic reversal of zonal winds in the tropical stratosphere, the quasi-biennial
More informationDynamical coupling between the middle atmosphere and lower thermosphere
Dynamical coupling between the middle atmosphere and lower thermosphere Anne Smith, Dan Marsh, Nick Pedatella NCAR* Tomoko Matsuo CIRES/NOAA NCAR is sponsored by the National Science Foundation Model runs
More informationThe Arctic Energy Budget
The Arctic Energy Budget The global heat engine [courtesy Kevin Trenberth, NCAR]. Differential solar heating between low and high latitudes gives rise to a circulation of the atmosphere and ocean that
More information