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CLIMATE CHANGE AND ISOPRENE EMISSIONS FROM VEGETATION
Citation:
Turner, D., J. Baglio, A. Wones, D. Pross, R. Vong, B. McVeety, AND D. Phillips. CLIMATE CHANGE AND ISOPRENE EMISSIONS FROM VEGETATION. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/J-92/094 (NTIS PB92153865), 1991.
Description:
A global model was developed for estimating spatial and temporal patterns in the emission of isoprene from vegetation under the current climate and used to estimate emissions under doubled-CO2 climate scenarios. urrent emissions were estimated on the basis of vegetation type, foliar biomass (derived from the satellite-generated Global Vegetation Index), and global databases for air temperature and photoperiod. he model had a monthly time step and the spatial resolution was 0.5 degrees latitude and longitude. oubled-CO2 climate emissions were estimated based on predicted changes in the areal extent of different vegetation types, each having a specific rate of annual isoprene emissions. The global total for current emissions was 285 Tg. he calculated isoprene emissions under a doubled-CO, climate were about 25% higher than current emissions due mainly to the expansion of tropical humid forests which had the highest annual emission rates. n increase in isoprene emissions is expected to increase atmospheric concentrations of ozone and methane, which are important greenhouse gases, and thus act as a positive feedback to global warming. etailed treatment of this question, however, will require incorporation of these emission surfaces into atmospheric chemistry models.
