My research focuses on the fluid dynamics of Earth’s tropical atmosphere. One emphasis is monsoon circulations, which deliver water to billions of people in socially vulnerable, agricultural economies. Despite the importance of monsoon rainfall, there is no established theory that explains the observed variability of monsoons, and climate models make disparate predictions for next-century changes in monsoon rainfall. In my work, I pay particular attention to the treatment of phase changes of water that result in precipitation, as the interaction between precipitation and planetary-scale flow is one of the central unresolved problems of tropical meteorology. To this end, I combine theory, observational analyses, and numerical models, frequently using computationally intensive, high resolution simulations to explicitly represent precipitating atmospheric convection.
Ph.D. in Atmospheric Science, 2008
M.Sc. in Geosystems, 2002
B.S. in Physics, B.A. in Math, 1997
Stanford Earth System Science seminar, April 23, 2018
Caltech Environmental Science and Engineering seminar, May 2, 2018
MIT Lorenz Center Workshop: Water and Climate Change: Connecting the Paleoclimate Record to Future Projections, June 3-6, 2018, Dedham, Massachusetts
International Centre for Theoretical Physics (ICTP) Workshop on the ITCZ and Monsoons, July 2-5, 2018, Trieste, Italy
Universidad Nacional Autónoma de México, annual Panorama of the Atmospheric Sciences, July 31, 2018
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 group currently has openings for a graduate student and an undergraduate intern.