A51O:
The Dynamics of the Large-Scale Atmospheric Circulation in Present and Future Climates: Jet Streams, Storm Tracks, Stationary Waves, and Monsoons I

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Session ID#: 31011

Session Description:
Large-scale atmospheric circulation plays a key role in the global climate system. Understanding the fundamental dynamics of the large-scale circulation is essential for constraining regional climate projections under increasing greenhouse gas concentrations. Furthermore, the dynamics of the atmospheric general circulation intimately interact with the hydrological cycle, exerting profound impacts on extreme weather and climate events. Such interactions in both the tropics and extra-tropics occur on a wide range of spatial and temporal scales, which calls for a combination of conceptual understanding, models of varying complexity, and observations.

We welcome contributions covering theory, idealized and comprehensive modeling, and novel diagnostic frameworks and metrics for observations and CMIP model outputs to improve our understanding of the large-scale atmospheric circulation and how it may respond to future climate change. Contributions including, but not limited to, the ITCZ, monsoons, storm tracks, extreme weather events, blocking, stationary waves, and atmospheric rivers are highly encouraged.

Primary Convener:  Lei Wang, Harvard University, Cambridge, MA, United States
Conveners:  Simona Bordoni, University of Trento, Trento, Italy, Gang Chen, University of California Los Angeles, Los Angeles, CA, United States and Isla Simpson, National Center for Atmospheric Research, Climate and Global Dynamics Laboratory, Boulder, CO, United States
Chairs:  Isla Simpson, National Center for Atmospheric Research, Climate and Global Dynamics Laboratory, Boulder, CO, United States and Simona Bordoni, University of Trento, Trento, Italy
OSPA Liaison:  Isla Simpson, National Center for Atmospheric Research, Climate and Global Dynamics Laboratory, Boulder, CO, United States
Index Terms:

1620 Climate dynamics [GLOBAL CHANGE]
3305 Climate change and variability [ATMOSPHERIC PROCESSES]
3319 General circulation [ATMOSPHERIC PROCESSES]
3373 Tropical dynamics [ATMOSPHERIC PROCESSES]

Abstracts Submitted to this Session:

Regionally Varying Assessments of Tropical Width in Reanalyses and CMIP5 Models Using a Tropopause Break Metric (254381)
Cameron R Homeyer1, Elinor R Martin2, Roarke McKinzie1 and Kevin McCarthy1, (1)University of Oklahoma, School of Meteorology, Norman, OK, United States, (2)University of Oklahoma, School of Meteorology, Norman, United States
The relation of regional and seasonal variations of the double-ITCZ bias to the atmospheric energy budget in CMIP5 models (211432)
Ori Adam, Hebrew University of Jerusalem, Jerusalem, Israel, Florent Brient, LMD/IPSL, Rennes, CDX, France and Tapio Schneider, California Institute of Technology, Environmental Science and Engineering, Pasadena, United States
Large uncertainty in the relative rates of dynamical and hydrological tropical expansion (257875)
William Seviour, Johns Hopkins University, Baltimore, MD, United States, Sean M Davis, NOAA Earth System Research Laboratory, Chemical Sciences Division, Boulder, United States, Kevin M Grise, University of Virginia, Charlottesville, VA, United States and Darryn Waugh, Johns Hopkins University, Earth and Planetary Sciences, Baltimore, MD, United States
The Interplay of Internal and Forced Modes of Hadley Cell Expansion: Lessons from the Global Warming Hiatus (289022)
Dillon J Amaya, University of Colorado, Boulder, United States, Nicholas Siler, Scripps Institution of Oceanography, La Jolla, CA, United States, Shang-Ping Xie, UCSD, Scripps Institution of Oceanography, La Jolla, United States and Arthur J Miller, Scripps Institution of Oceanography, La Jolla, United States
Decomposing the Eddy-Mean Flow Response of the Hadley Circulation to Greenhouse Gas Forcings (298653)
Nicholas Davis, Colorado State University, Fort Collins, CO, United States and Thomas Birner, CO State Univ-Atmospheric Sci, Fort Collins, CO, United States
The Hadley Circulation's Response to Imposed Idealized Ocean Heat Transport in an Aquaplanet GCM (233889)
Casey Hilgenbrink, University of Washington Seattle Campus, Atmospheric Sciences, Seattle, WA, United States and Dennis L. Hartmann, University of Washington, Department of Atmospheric Sciences, Seattle, WA, United States

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