A31N:
Extratropical Large-Scale Atmospheric Circulation Variability II Posters


Submit an Abstract to this Session


Session ID#: 50522

Session Description:
The extratropical atmospheric circulation is characterized by large-scale variability patterns such as blocking events, large-amplitude/quasi-stationary planetary waves, and annular modes. The midlatitude variability is important to the extratropical weather (and weather extremes), as well as the interaction of the extratropical troposphere with the tropics, stratosphere, ocean, and cryosphere. While widely studied, many questions remain unanswered about the dynamics, predictability, and climate projections of the extratropical atmospheric variability, and current weather/climate models have difficulties faithfully reproducing some of the observed behavior.


The goal of this session is to synthesize observational, hierarchical modeling, and theoretical studies of various aspects of this variability such as the associated dynamics, sources of predictability, responses to climate change, and connections with weather extremes. A deeper understanding will improve weather predictions on sub-seasonal and longer timescales, and help with interpreting regional responses to climate change. These are active areas of research with significant scientific and socio-economic impacts.

Primary Convener:  Pedram Hassanzadeh, Rice University, Houston, TX, United States
Conveners:  Ding Ma, Columbia University of New York, Earth Institute, Palisades, NY, United States; Columbia University, New York, NY, United States, Aditi Sheshadri, Columbia University of New York, Palisades, United States and Elizabeth A Barnes, Colorado State University, Department of Atmospheric Science, Fort Collins, United States
Primary Liaison:  Pedram Hassanzadeh, Rice University, Houston, TX, United States
Chairs:  Pedram Hassanzadeh, Rice University, Department of Mechanical Engineering and Department of Earth, Environmental and Planetary Sciences, Houston, United States and Aditi Sheshadri, Columbia University of New York, Palisades, United States
OSPA Liaison:  Pedram Hassanzadeh, Rice University, Department of Mechanical Engineering and Department of Earth, Environmental and Planetary Sciences, Houston, United States

Cross-Listed:
  • GC - Global Environmental Change
  • NG - Nonlinear Geophysics
Index Terms:

3305 Climate change and variability [ATMOSPHERIC PROCESSES]
3319 General circulation [ATMOSPHERIC PROCESSES]
3337 Global climate models [ATMOSPHERIC PROCESSES]
4313 Extreme events [NATURAL HAZARDS]

Abstracts Submitted to this Session:

Regional Winter Westerly Wave Variability and Cape Town’s Day Zero Drought (442463)
Willem Stefaan Conradie1, Sabina Abba Omar2, Bruce Hewitson3 and Piotr Wolski1, (1)University of Cape Town, Climate System Analysis Group, Cape Town, South Africa, (2)Climate Systems Analysis Group, Rondebosch, South Africa, (3)University of Cape Town, Cape Town, South Africa
Competing effects of moisture-eddy feedbacks and stationary waves in the mid-latitude atmosphere (458240)
Lei Wang, Harvard University, Cambridge, MA, United States, Zhiming Kuang, Harvard University, Department of Earth and Planetary Sciences and School of Engineering and Applied Sciences, Cambridge, United States and Jian Lu, Pacific Northwest National Laboratory, Richland, WA, United States
Control of Storminess over the Pacific and North America by Circulation Regimes: Forecast Model Verification (376583)
David M Straus1,2 and Sara Amini1,3, (1)George Mason University Fairfax, AOES, Fairfax, VA, United States, (2)George Mason Univ, Atmospheric, Oceanic and Earth Sciences, Fairfax, VA, United States, (3)George Mason University Fairfax, Atmospheric, Oceanic and Earth Sciencesi, Fairfax, VA, United States
Diagnosing the Characteristic Interaction between the Polar and Subtropical Jet Streams during North American Jet Superposition Events (367839)
Andrew Charles Winters, University of Colorado at Boulder, Department of Atmospheric and Oceanic Sciences, Boulder, United States, Lance F Bosart, University at Albany State University of New York, Atmospheric and Environmental Sciences, Albany, United States and Daniel Keyser, University at Albany, State University of New York, Department of Atmospheric and Environmental Sciences, Albany, NY, United States
Different teleconnection processes associated with the two leading modes of the interannual variability of South America continent winter surface temperature (380078)
Yanjie Li, Chinese Academy of Sciences, Beijing, China, Jianping Li, Ocean University of China, Frontiers Science Center for Deep Ocean Multi-spheres and Earth System (DOMES)/Key Laboratory of Physical Oceanography/Academy of Future Ocean/College of Oceanic and Atmospheric Sciences/Center for Ocean Carbon Neutrality, Qingdao, China, Fred Kucharski, Abdus Salam International Center for Theoretical Physics, Earth Physics Section, Trieste, Italy, Jin Feng, Institute of Atmospheric Physics, Beijing, China, Sen Zhao, IAP Insititute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China and Jiayu Zheng, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guang Zhou, China
Exploring What Determines the Duration of Atmospheric Blocks (394890)
Veeshan T Narinesingh, CUNY Graduate Center, New York, United States, James F Booth, CUNY City College, New York, NY, United States, Spencer Clark, Allen Institute for AI, Seattle, United States and Yi Ming, Boston College, Chestnut Hill, MA, United States
Extreme Events as Atmospheric Rogue Waves (464412)
Claire Valva1, Clare Huang2 and Noboru Nakamura2, (1)University of Chicago, Department of Geophysical Sciences, Chicago, IL, United States, (2)University of Chicago, Department of the Geophysical Sciences, Chicago, IL, United States
How will climate change affect the size of blocking events? (361015)
Ebrahim Nabizadeh, Rice University, Houston, TX, United States, Pedram Hassanzadeh, Rice University, Department of Mechanical Engineering and Department of Earth, Environmental and Planetary Sciences, Houston, United States and Da Yang, Caltech, Pasadena, United States
Potential Drivers of Projected Uncertainties in Northern Winter Extratropical Circulation in CMIP5 Coupled Models (382891)
Ho Nam Cheung, Sun Yat-Sen University, Guangzhou, China; University of Bergen, Bergen, Norway, Noel S Keenlyside, University of Bergen, Geophysical Institute, Bergen, Norway, Shuting Yang, Danish Meteorological Institute, København Ø, Denmark, Torben Koenigk, Swedish Meteorological and Hydrological Institute, Rossby Centre, Norrköping, Sweden; Bolin Centre for Climate Research, Stockholm, Sweden, Yongqi Gao, Nansen Environmental and Remote Sensing Center, Bergen, Norway, Zhiqing Xu, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China, Fumiaki Ogawa, University of Bergen and Bjerknes Centre for Climate Research, Bergen, Norway, Nour-Eddine Omrani, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany and Wen Zhou, City University of Hong Kong, Hong Kong, Hong Kong
Quantifying the Agreement Between Observed and Simulated Extratropical Modes of Interannual Variability (352969)
Jiwoo Lee1, Kenneth R Sperber2, Peter J Gleckler1, Celine Bonfils1 and Karl E. Taylor3, (1)Lawrence Livermore National Laboratory, Livermore, CA, United States, (2)LLNL, Livermore, CA, United States, (3)Lawrence Livermore National Laboratory, Program for Climate Model Diagnosis and Intercomparison (PCMDI), Livermore, CA, United States
Re-identifying Clustered Weather Patterns: A Test Case for Deep Convolutional Neural Networks (358242)
Ashesh Kumar Chattopadhyay, Rice University, Houston, United States and Pedram Hassanzadeh, Harvard University, Cambridge, MA, United States; Rice University, Houston, TX, United States
Baroclinic Eddy-Driven Variability of the Zonal-Mean Zonal Wind in the Northern Hemisphere Winter (405841)
José M. Castanheira and Carlos A F Marques, University of Aveiro, Aveiro, Portugal
Representation of blocking in a multi-model ensemble of high-resolution coupled global climate models (373085)
Reinhard Schiemann, National Centre for Atmospheric Science, Leeds, United Kingdom, Panos Athanasiadis, CMCC Foundation - Euro-Mediterranean Center on Climate Change, Bologna, Italy and Pier Luigi Vidale, University of Reading, Department of Meteorology, and National Centre for Atmospheric Science (NCAS), Reading, RG6, United Kingdom
The ENSO-North Atlantic Teleconnection: Interaction between the Stratosphere and the Strength of the Pacific Tropical Forcing. (366785)
Bernat Jimenez-Esteve, ETH Zurich, Dep. of Environmental Systems Science, Zurich, Switzerland and Daniela Domeisen, University of Lausanne, Lausanne, Switzerland
The Role of Eddy-Eddy Interactions in Sudden Stratospheric Warming Formation (376415)
Erik Anders Lindgren, Massachusetts Institute of Technology, Dept. of Earth, Atmospheric and Planetary Sciences, Cambridge, MA, United States and Aditi Sheshadri, Stanford University, Department of Earth System Science, Stanford, United States
The Role of Mean State Bias in a Climate Model on Atmospheric Blocking Frequency (461276)
Edward Kleiner1, Lei Wang1, Pak Wah Chan2 and Zhiming Kuang3, (1)Harvard University, Cambridge, MA, United States, (2)Harvard University, Department of Earth and Planetary Sciences, Cambridge, United States, (3)Harvard University, Department of Earth and Planetary Sciences and School of Engineering and Applied Sciences, Cambridge, United States
The Role of Summer Monsoon in Midlatitude Rossby Wave Breaking (411747)
Sandro W. Lubis, PNNL, Richland, United States, Noboru Nakamura, University of Chicago, Department of the Geophysical Sciences, Chicago, IL, United States and Martin Jucker, University of New South Wales, Sydney, Australia
Three-Dimensional Structures in the Low-Frequency Flow Variability of the Extratropical Troposphere (453474)
Justin J Wettstein, Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, OR, United States and Camille Li, University of Bergen and Bjerknes Centre for Climate Research, Bergen, Norway
Varying Rossby Wave Trains from the Developing to Decaying Period of the Upper Atmospheric Heat Source over the Tibetan Plateau in Boreal Summer (393852)
Chuandong Zhu, Rongcai Ren and Guoxiong Wu, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China
Was the North American Extreme Climate in Winter 2013/14 a SST forced Response? (408771)
Peitao Peng1, Arun Kumar2, Mingyue Chen3, Zeng-Zhen Hu4 and Bhaskar Jha1, (1)Climate Prediction Center College Park, College Park, MD, United States, (2)NOAA/NCEP, College Park, MD, United States, (3)NOAA Science Center, College Park, MD, United States, (4)Climate Prediction Center, NCEP/NOAA, College Park, MD, United States
What Drives the North Atlantic Oscillation's Surface Air Temperature Anomaly Pattern? (411821)
Joseph Clark, Princeton University, Princeton, United States and Steven B Feldstein, Penn St Univ, University Park, PA, United States

See more of: Atmospheric Sciences