Biogenic Hydrocarbons in the Atmospheric Boundary Layer: A Review

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Nonmethane hydrocarbons are ubiquitous trace atmospheric constituents yet they control the oxidation capacity of the atmosphere. Both anthropogenic and biogenic processes contribute to the release of hydrocarbons to the atmosphere. In this manuscript, the state of the science concerning biosynthesis, transport, and chemical transformation of hydrocarbons emitted by the terrestrial biosphere is reviewed. In particular, the focus is on isoprene, monoterpenes, and oxygenated hydrocarbons. The generated science during the last 10 years is reviewed to explain and quantify hydrocarbon emissions from vegetation and to discern impacts of biogenic hydrocarbons on local and regional atmospheric chemistry. Furthermore, the physiological and environmental processes controlling biosynthesis and production of hydrocarbon compounds are reported on. Many advances have been made on measurement and modeling approaches developed to quantify hydrocarbon emissions from leaves and forest ecosystems. A synthesis of the atmospheric chemistry of biogenic hydrocarbons and their role in the formation of oxidants and aerosols is presented. The integration of biogenic hydrocarbon kinetics and atmospheric physics into mathematical modeling systems is examined to assess the contribution of biogenic hydrocarbons to the formation of oxidants and aerosols, thereby allowing us to study their impacts on the earth's climate system and to develop strategies to reduce oxidant precursors in affected regions.

aDepartment of Environmental Sciences, University of Virginia, Charlottesville, Virginia.

bDepartment of Ecology, State University of New York at Stony Brook, Stony Brook, New York.

cAir Pollution Research Center, University of California, Riverside, Riverside, California.

dDepartment of Environmental Sciences, University of California, Berkeley, Berkeley, California.

eEnvironment Canada, Downsview, Ontario, Canada.

fInstituto Inquinamento Atmosferico, Via Salaria, Montorotondo Scalo, Rome, Italy.

gDepartment of Environmental and Civil Engineering, Washington State University, Pullman, Washington.

hU.S. Environmental Protection Agency, National Risk Management Research Laboratory, Research Triangle Park, North Carolina.

iNational Center for Atmospheric Research, Boulder, Colorado

jDepartment of Botany, University of Wisconsin, Madison, Wisconsin.

kDivision of Atmospheric Sciences, Desert Research Institute, Reno, Nevada.

Corresponding author address: J. D. Fuentes, Department of Environmental Sciences, Clark Hall, University of Virginia, Charlottesville, VA 22903. E-mail: jf6s@virginia.edu

Nonmethane hydrocarbons are ubiquitous trace atmospheric constituents yet they control the oxidation capacity of the atmosphere. Both anthropogenic and biogenic processes contribute to the release of hydrocarbons to the atmosphere. In this manuscript, the state of the science concerning biosynthesis, transport, and chemical transformation of hydrocarbons emitted by the terrestrial biosphere is reviewed. In particular, the focus is on isoprene, monoterpenes, and oxygenated hydrocarbons. The generated science during the last 10 years is reviewed to explain and quantify hydrocarbon emissions from vegetation and to discern impacts of biogenic hydrocarbons on local and regional atmospheric chemistry. Furthermore, the physiological and environmental processes controlling biosynthesis and production of hydrocarbon compounds are reported on. Many advances have been made on measurement and modeling approaches developed to quantify hydrocarbon emissions from leaves and forest ecosystems. A synthesis of the atmospheric chemistry of biogenic hydrocarbons and their role in the formation of oxidants and aerosols is presented. The integration of biogenic hydrocarbon kinetics and atmospheric physics into mathematical modeling systems is examined to assess the contribution of biogenic hydrocarbons to the formation of oxidants and aerosols, thereby allowing us to study their impacts on the earth's climate system and to develop strategies to reduce oxidant precursors in affected regions.

aDepartment of Environmental Sciences, University of Virginia, Charlottesville, Virginia.

bDepartment of Ecology, State University of New York at Stony Brook, Stony Brook, New York.

cAir Pollution Research Center, University of California, Riverside, Riverside, California.

dDepartment of Environmental Sciences, University of California, Berkeley, Berkeley, California.

eEnvironment Canada, Downsview, Ontario, Canada.

fInstituto Inquinamento Atmosferico, Via Salaria, Montorotondo Scalo, Rome, Italy.

gDepartment of Environmental and Civil Engineering, Washington State University, Pullman, Washington.

hU.S. Environmental Protection Agency, National Risk Management Research Laboratory, Research Triangle Park, North Carolina.

iNational Center for Atmospheric Research, Boulder, Colorado

jDepartment of Botany, University of Wisconsin, Madison, Wisconsin.

kDivision of Atmospheric Sciences, Desert Research Institute, Reno, Nevada.

Corresponding author address: J. D. Fuentes, Department of Environmental Sciences, Clark Hall, University of Virginia, Charlottesville, VA 22903. E-mail: jf6s@virginia.edu
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