Title
Associate Professor

Department
Dept of Environmental Science, Policy & Management
Dept of Geography


Faculty URL
http://ourenvironment.berkeley.edu/people_profiles/robert-rhew/

Research Group
http://rhewlab.geog.berkeley.edu/

Email
rrhew@berkeley.edu

Phone
(510) 642-3903

Fax
(510) 642-3370


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Research Expertise and Interest
geography, terrestrial-atmosphere exchange of trace gases, atmospheric chemistry and composition, halogen biogeochemistry, stratospheric ozone depletion issues, coastal salt marsh, chaparral, desert, tundra, boreal forest, grassland

Research Description
Humans have modified the chemical composition of the earth’s atmosphere through emissions of radiatively and environmentally active compounds. Consequently, our society faces a triumvirate of interrelated global atmospheric chemistry issues: stratospheric ozone depletion, the enhanced greenhouse effect, and the changing capacity of the atmosphere to oxidize pollutants. The primary players in these atmospheric chemistry problems are the trace gases, which account for only a fraction of a percent of the total atmospheric composition. My field of research is trace gas biogeochemistry, which involves elucidating the interactions between the atmosphere, biosphere, soils, and hydrosphere.
My work involves laboratory and field-based measurements in different terrestrial ecosystems, such as coastal salt marsh, chaparral, desert, tundra, boreal forest, grassland, and temperate forest. My research seeks to identify natural terrestrial sources and sinks of important trace gases, to quantify their fluxes, and to determine the environmental and biological controls on those fluxes. Recent innovations in measurement technology and analytical design have allowed for the precise and accurate analysis of gases at the parts-per-trillion concentration levels, opening up a wealth of research opportunity to study their biogeochemical cycles.