I am broadly interested in climate and specifically the role of clouds in the climate system, and perturbations to clouds through human-induced forcing and feedbacks. My work includes analysis of both data and a range of different atmospheric models, mostly large scale global General Circulation Models. My research has focused recently on cloud microphysics, aerosols and ice phase clouds.
Past research has included extensive studies of the Upper Troposphere and Lower Stratosphere in the tropics and extra-tropics. Including the exchange of air between the stratosphere and the troposphere, with a focus on water vapor. The exchange of air (and especially water vapor) across the tropopause is of fundamental importance for predicting the future chemistry of the stratosphere, and the future evolution and recovery of the stratospheric ozone layer. Water vapor in this region also has important radiative feedbacks on climate. Understanding water vapor variations and trends has led me to expand my research to understanding cloud processes and their role in the climate system.
My teaching focus is to use multiple approaches to make the material accessible for different learning styles. For example, sometimes understanding is found visually or graphically, and sometimes numerically. From personal experience as a student and a teacher, I have found that creating interest and understanding requires a variety of approaches. I have found this generally works at all levels, from 2nd grade up through undergraduate and graduate students. I also value the development of my own written and oral communication skills inherent in teaching.
I am very comfortable in teaching climate, atmospheric dynamics, dynamic meteorology or atmospheric chemistry at a basic or advanced level. Recently I led efforts to teach a Climate Modeling Tutorial for the NCAR Community Atmosphere Model and the Community Earth System Model in 2009 and 2010. I have also taught at several summer schools, in addition to organizing in the past a basic graduate climate course at the University of Colorado.