The climate of the Earth is intimately tied to the composition of the atmosphere and the dynamics of the underlying surface. The atmosphere and land surface exchange energy, water and other trace substances on all space and time scales. The exchange is dependent on and, in turn, determines the states of the atmosphere and biosphere themselves. My research in the past decade has focused on the many aspects of biosphere-atmosphere interaction, with the goal of gaining predictive capability of how atmospheric composition may evolve in the future. My principal tool is the fully coupled atmosphere-land-ocean-ice Community Climate System Model of the National Center for Atmospheric Research, to which we have added an interactive carbon cycle. A current research focus is the interaction between the carbon cycle and changing climate and circulation, to understand if these interactions act to accelerate global warming.
In the News
Two of the world’s most eminent research institutions from the United States and the United Kingdom issued a joint publication today (Thursday, Feb. 27) that distills climate change science.
University of California, Berkeley, scientists will receive $4,900,000 over the next five years to study the nearly 10,000 square kilometer Eel River watershed in Northern California and how its vegetation, geology and topography affect water flow all the way to the Pacific Ocean.
The release today (Friday, Sept. 27) of Assessment Report 5, a new report by the Intergovernmental Panel on Climate Change (IPCC), bolsters the conclusions of its 2007 report that humans are responsible for global warming, and it highlights the need for immediate action to reduce carbon emissions.
Global warming may include some periods of local cooling, according to a new study by UC Berkeley researchers. Results from satellite and ground-based sensor data show that sweltering summers can, paradoxically, lead to the temporary formation of a cooling haze in the southeastern United States.
Not only has the average global temperature increased in the past 50 years, but the hottest day of the year has shifted nearly two days earlier, according to a new study by scientists from the UC Berkeley and Harvard University.