A51Q:
Tropical Circulations and Their Sensitivities to Changes in Climate I

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Session ID#: 16439

Session Description:
Tropical atmospheric circulations strongly influence Earth’s climate, both locally and globally, via their transports of energy, moisture, and momentum, and their shaping of cloud and water vapor distributions. These circulations respond to changes in climate and the ocean circulation with, for example, large shifts in the location of the ITCZ found in the paleoclimate record and a weakening of the Hadley and Walker circulations expected as the climate warms. However, there is only limited understanding of the physical mechanisms responsible for these changes, and the sensitivities to changes in climate of other components of the tropical circulation, such as monsoons, are even less constrained. The objective of this session is to advance our mechanistic understanding of the various dynamical components of the tropical circulation and how they respond to past and future climate change. We encourage theoretical, observational, and modeling contributions on this topic.
Primary Convener:  Michael Byrne, ETH Zurich, Zurich, Switzerland
Conveners:  Spencer A Hill, Princeton University, Princeton, United States, Elizabeth Maroon, University of Wisconsin Madison, Madison, WI, United States and Brian Green, Massachusetts Institute of Technology, Cambridge, MA, United States
Chairs:  Michael Byrne, ETH Zurich, Zurich, Switzerland and Spencer A Hill, Princeton University, Princeton, United States
OSPA Liaison:  Spencer A Hill, Princeton University, Princeton, United States

Cross-Listed:
  • GC - Global Environmental Change
  • OS - Ocean Sciences
  • PP - Paleoceanography and Paleoclimatology
Index Terms:

3305 Climate change and variability [ATMOSPHERIC PROCESSES]
3319 General circulation [ATMOSPHERIC PROCESSES]
3339 Ocean/atmosphere interactions [ATMOSPHERIC PROCESSES]
3373 Tropical dynamics [ATMOSPHERIC PROCESSES]

Abstracts Submitted to this Session:

What can moist thermodynamics tell us about the Hadley circulation response to climate change? (Invited) (153064)
Tiffany Shaw, The University of Chicago, Chicago, United States and Aiko Voigt, Lamont-Doherty Earth Observatory, Columbia University, New York, United States
The influence of idealized zonally-varying boundary conditions on zonally-asymmetric ITCZ migrations (179437)
Ho-Hsuan Wei, California Institute of Technology, Pasadena, CA, United States and Simona Bordoni, University of Trento, Trento, Italy
The Impact of Coupled High-Latitude Climate Feedbacks on Tropical Circulations (144100)
Nicole Feldl, University of California, Santa Cruz, Santa Cruz, CA, United States, Simona Bordoni, University of Trento, Trento, Italy and Timothy M Merlis, McGill University, Montreal, QC, Canada
Clouds, Circulation, and Climate Sensitivity in a Radiative-Convective Equilibrium Channel Model (180440)
Timothy Cronin, Massachusetts Institute of Technology, Earth, Atmospheric and Planetary Sciences, Cambridge, MA, United States and Allison A Wing, Columbia University of New York, Palisades, NY, United States
Changes in tropical precipitation cluster size distributions under global warming (187756)
J David Neelin, University of California Los Angeles, Los Angeles, CA, United States and Kevin M. Quinn, University of California Los Angeles, Atmospheric and Oceanic Sciences, Los Angeles, CA, United States
The response of the Asian monsoon to the geologic extremes of the past 50 million years. (Invited) (169724)
Gerard Roe, University of Washington, Seattle, United States, Qinghua Ding, University of California, Santa Barbara, Geography and Earth Research Institute, Santa Barbara, United States, David S Battisti, University of Washington, Department of Atmospheric Sciences, Seattle, WA, United States and Peter H Molnar, University of Colorado at Boulder, Department of Geological Sciences, Boulder, CO, United States
The role of Ekman transport on the ITCZ response to extratropical thermal forcing (130983)
Sarah M Kang, Ulsan National Institute of Science and Technology, Ulsan, Germany, Yechul Shin, Pohang University of Science and Technology, Pohang, South Korea, Shang-Ping Xie, UCSD, Scripps Institution of Oceanography, La Jolla, United States and Dargan Frierson, University of Washington, Atmospheric and Climate Science, Seattle, United States

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