A43J:
Extratropical Large-Scale Atmospheric Circulation Variability I

Submit an Abstract to this Session



Session ID#: 33416

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:  Ding Ma, Columbia University of New York, Earth Institute, Palisades, NY, United States
Conveners:  Elizabeth A Barnes, Colorado State University, Department of Atmospheric Science, Fort Collins, United States, Pedram Hassanzadeh, Rice University, Houston, TX, United States and Ji Nie, Columbia University of New York, Lamont Doherty Earth Observatory, Palisades, United States
Chairs:  Ding Ma, Columbia University of New York, Earth Institute, Palisades, NY, United States and Pedram Hassanzadeh, Rice University, Houston, TX, United States
OSPA Liaison:  Ding Ma, Columbia University of New York, Earth Institute, Palisades, NY, United States

Cross-Listed:
  • C - Cryosphere
  • H - Hydrology
  • OS - Ocean Sciences
Index Terms:

1616 Climate variability [GLOBAL CHANGE]
1620 Climate dynamics [GLOBAL CHANGE]
3305 Climate change and variability [ATMOSPHERIC PROCESSES]
3319 General circulation [ATMOSPHERIC PROCESSES]

Abstracts Submitted to this Session:

Intraseasonal Periodicity in Extratropical Storm Activity (Invited) (236765)
David W J Thompson, Colorado State University, Department of Atmospheric Science, Fort Collins, CO, United States
Propagating annular modes (Invited) (246651)
Aditi Sheshadri, Columbia University of New York, Palisades, United States and Raymond Alan Plumb, MIT, Dept.of Earth Atmospheric and Planetary Sciences, Cambridge, MA, United States
Atmospheric blocking as a traffic jam in the jet stream (298599)
Noboru Nakamura and Shao Ying Huang, University of Chicago, Department of the Geophysical Sciences, Chicago, IL, United States
Dynamics of the Transient Negative Eddy Response to Zonal-Mean Zonal Wind Variations (287728)
David J Lorenz, Center for Climatic Research, Madison, WI, United States
On the Roles of Upper- versus Lower-level Thermal Forcing in Shifting the Eddy-Driven Jet (292105)
Yang Zhang1, Yu Nie2, Gang Chen3 and Xiu-Qun Yang1, (1)Nanjing University, Nanjing, China, (2)Beijing Climate Center, China Meteorological Administration, Beijing, China, (3)University of California Los Angeles, Department of Atmospheric and Oceanic Sciences, Los Angeles, CA, United States
The link between eddy-driven jet variability and weather regimes in the North Atlantic-European sector (216454)
Erica Madonna1,2, Camille Li1,2, Christian M. Grams3 and Tim Woollings4, (1)University of Bergen, Geophysical Institute, Bergen, Norway, (2)Bjerknes Centre for Climate Research, Bergen, Norway, (3)ETH Zurich, Institute for Atmospheric and Climate Science, Zurich, Switzerland, (4)University of Oxford, Department of Physics, Oxford, United Kingdom
Narrowing of the mid-latitude atmospheric circulation under climate change due to competing influences of polar and tropical processes (222222)
Yannick Peings, University of California Irvine, Earth System Science, Irvine, United States, Gudrun Magnusdottir, University of California Irvine, Earth System Science, Irvine, CA, United States and Julien Cattiaux, CNRM-GAME, Toulouse Cedex 01, France

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