*********************************
There is now a CONTENT FREEZE for Mercury while we switch to a new platform. It began on Friday, March 10 at 6pm and will end on Wednesday, March 15 at noon. No new content can be created during this time, but all material in the system as of the beginning of the freeze will be migrated to the new platform, including users and groups. Functionally the new site is identical to the old one. webteam@gatech.edu
*********************************
Natasha Lawson
Summary Sentence: A seminar by Dr. Daniel Westervelt, School of Earth and Atmospheric Sciences
Full Summary: No summary paragraph submitted.
Dan WesterveltConnecting Regional Aerosol Emissions Reductions to Local and Remote Temperature and Precipitation Responses
The unintended climatic implications of aerosol and precursor emission reductions implemented to protect public health are not well understood.
I will present research investigating the mean and extreme temperature, cloud, and precipitation response to regional changes in aerosol emissions using three coupled chemistry-climate models: NOAA Geophysical Fluid Dynamics Laboratory Coupled Model 3 (GFDL-CM3), NCAR Community Earth System Model (CESM1), and NASA Goddard Institute for Space Studies ModelE2 (GISS-E2).
My approach contrasts a long present-day control simulation from each model with fourteen individual aerosol emissions perturbation simulations.
I will discuss responses and propose physical mechanisms for local and remote precipitation and temperature responses to these individual regional aerosol perturbations around the world. In particular, I will discuss connections to the location of the Intertropical Convergence Zone, the West African monsoon and Sahel drought, the South Asian monsoon, and projections onto known modes of climatic variability such as the North Atlantic Oscillation and the El Nino-Southern Oscillation.
I will also show how temperature and precipitation extremes (such as heatwaves and droughts) can be impacted by changing aerosol emissions. Finally, I will present my vision for future directions of research in this field.
