A34C:
Anthropogenic Aerosol Forcing: Mechanisms of Regional Climate Variability and Change I

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Session ID#: 16083

Session Description:
There is large uncertainty in our understanding of regional changes in the climate system and the extent to which they are influenced by anthropogenic aerosols. Aerosols, the largest forcing uncertainty over the industrial period, are important since their forcing is spatially heterogeneous and can counteract greenhouse gas forcing. By modulating radiation and altering cloud properties, aerosols affect surface and atmospheric heating gradients and precipitation, resulting in atmospheric circulation changes. The objective of this session is to improve the understanding of mechanisms and pathways for the aerosol impact on regional climate worldwide. Observational and modeling studies focusing on changes in variability, long-term trends, and extremes in the hydrological cycle, in the recent past as well as the coming decades, are particularly solicited. We encourage papers investigating the impact of aerosols on monsoon systems, ITCZ, tropical-extratropical interactions and teleconnections, modes of variability, and the role of local versus remote aerosol emissions.
Primary Convener:  Massimo A Bollasina, University of Edinburgh, Edinburgh, United Kingdom
Conveners:  Yi Ming, Boston College, Chestnut Hill, MA, United States, Debbie Polson, University of Edinburgh, Edinburgh, United Kingdom and Laura Wilcox, University of Reading, National Centre for Atmospheric Science, Reading, RG6, United Kingdom
Chairs:  Massimo A Bollasina, University of Edinburgh, Edinburgh, United Kingdom and Yi Ming, Boston College, Chestnut Hill, MA, United States
OSPA Liaison:  Massimo A Bollasina, University of Edinburgh, Edinburgh, United Kingdom
Co-Organized with:
Global Environmental Change, and Global Environmental Change

Cross-Listed:
  • GC - Global Environmental Change

Proposed Co-Organized Session with:
  • GC - Global Environmental Change
Index Terms:

0305 Aerosols and particles [ATMOSPHERIC COMPOSITION AND STRUCTURE]
1620 Climate dynamics [GLOBAL CHANGE]
3305 Climate change and variability [ATMOSPHERIC PROCESSES]
3354 Precipitation [ATMOSPHERIC PROCESSES]

Abstracts Submitted to this Session:

A Systematic Exploration of the Local and Remote Climate Effects of Anthropogenic Aerosol Emissions from Key Regions (Invited) (145057)
Apostolos Voulgarakis1, Matthew Kasoar1, Dilshad Shawki2, J F Lamarque3, Drew T Shindell4, Gregory Faluvegi5, Nicolas Bellouin6, William Collins6 and Kostas Tsigaridis7, (1)Imperial College London, Physics, London, United Kingdom, (2)Imperial College London, London, United Kingdom, (3)National Center for Atmospheric Research, Boulder, CO, United States, (4)Duke University, Nicholas School of the Environment, Durham, United States, (5)NASA Goddard Institute for Space Studies, New York, NY, United States, (6)University of Reading, Reading, United Kingdom, (7)Columbia University in the City of New York, New York, United States
Fast and Slow Responses of the Asian Summer Monsoon to Anthropogenic Aerosols (147731)
Xiaoqiong Li, Columbia University of New York, Palisades, NY, United States and Mingfang Ting, Columbia Climate School, New York, United States
Competing influence of greenhouse warming and aerosols on thermodynamic and dynamic controls of the Asian monoon (128829)
William K-M Lau, University of Maryland College Park, Department of Atmospheric and Oceanic Sciences, College Park, MD, United States and Kyu-Myong Kim, NASA Goddard Space Flight Center, Greenbelt, MD, United States
The United States Summertime "Warming Hole": Comparing the Contributions from Aerosol Forcing and Internal Variability (163110)
Antara Banerjee1, Prof. Lorenzo M Polvani, PhD1 and John C Fyfe2, (1)Columbia University of New York, Palisades, NY, United States, (2)Environment Canada, Canadian Centre for Climate Modeling and Analysis, Victoria, BC, Canada
Recent reductions in aerosol burden have contributed to accelerated summertime warming in the southeast United States (199967)
Mick Tosca1, James R Campbell2, Michael J Garay3, Olga V. Kalashnikova3, Felix C Seidel4 and Simone Lolli5, (1)Jet Propulsion Laboratory, Pasadena, CA, United States, (2)Naval Research Laboratory, Marine Meteorology Division, Monterey, CA, United States, (3)NASA Jet Propulsion Laboratory, California Institute of Technology, Pasadena, United States, (4)NASA Jet Propulsion Laboratory, Pasadena, CA, United States, (5)NASA Goddard Space Flight Center, Greenbelt, MD, United States
The impact of changes in anthropogenic aerosol load on climate trends in Europe during the last decades and its sensitivity to aerosol optical properties (173402)
Markus Schultze and Burkhardt Rockel, Helmholtz-Zentrum Geesthacht Centre for Materials and Coastal Research, Geesthacht, Germany
The Influence of Anthropogenic Aerosols On the Arctic Sea Ice (127671)
Yuan Wang1, Jonathan H. Jiang1 and Hui Su2, (1)California Institute of Technology, Pasadena, CA, United States, (2)NASA Jet Propulsion Laboratory, Pasadena, CA, United States
What Are the Best Fingerprints for Detecting Anthropogenic Aerosol Cooling? (148666)
Xiaoqin Yan1,2, Timothy M DelSole2 and Michael Tippett3, (1)Geophysical Fluid Dynamics Laboratory, Princeton, NJ, United States, (2)George Mason University Fairfax, Fairfax, VA, United States, (3)Department of Applied Physics and Applied Mathematics, Columbia University, New York, United States

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