Our group’s research focuses on Earth’s tropical climate. We work on a range of problems involving atmosphere-ocean dynamics, land surface processes, radiative transfer, and thermodynamics. One emphasis is monsoon circulations, which deliver water to billions of people living in Asia, Africa, the Americas, and northern Australia; monsoon winds also constitute a major component of the global circulation of Earth’s atmosphere. In our work, we combine theory, observational analyses, and numerical models, paying particular attention to the treatment of phase changes of water, as the interaction of precipitating clouds with planetary-scale flow is one of the central unresolved problems of planetary science.
Ph.D. in Atmospheric Science, 2008
M.Sc. in Geosystems, 2002
B.S. in Physics, B.A. in Math, 1997
I’m thinking about my carbon footprint and trying to minimize travel, though I do undertake trips that are important for my mission of trying to improve the understanding and prediction of precipitation in tropical, developing countries. I post my travel plans here in hopes that future trips might be combined to minimize air travel. One cross-country, round-trip U.S. flight emits about 1000 kg of CO2, while one long-haul international round trip emits about 2000 kg of CO2. In comparison, all of the electricity, natural gas, and municipal water used by my 2-person household are estimated to generate about 4000 kg of CO2 per year.
Current courses at UC Berkeley:
WorldMonsoons.org, a website with educational pages and recent news about monsoons
Somali jet index, a measure of the strength of the South Asian monsoon circulation, and of roughly 30 percent of the global cross-equatorial flow
South Asian vertical shear index, the strength of the vertical shear of the zonal wind over South Asian. This was developed by Webster and Yang (1992, QJRMS) as a measure of the strength of the South Asian monsoon circulation.
My research group will have an opening for a new graduate student to start in Fall 2020. Details can be found here.