||Climate Change and Isoprene Emissions from Vegetation.
Turner, D. P.;
Baglio, J. V.;
McVeety, B. D.;
Phillips., D. L.;
||Corvallis Environmental Research Lab., OR. ;ManTech Environmental Technology, Inc., Corvallis, OR. ;Oregon State Univ., Corvallis. ;Battelle Pacific Northwest Labs., Richland, WA.
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||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. Current 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. The model had a monthly time step and the spatial resolution was 0.5 degrees latitude and longitude. Doubled-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. The calculated isoprene emissions under a doubled-CO2 climate were about 25% higher than current emissions due mainly to the expansion of tropical humid forests which had the highest annual emission rates. An 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. Detailed treatment of the question, however, will require incorporation of these emission surfaces into atmospheric chemistry models.
||Pub. in Chemosphere, v23 n1 p37-56. See also PB91-226480. Prepared in cooperation with ManTech Environmental Technology, Inc., Corvallis, OR., Oregon State Univ., Corvallis, and Battelle Pacific Northwest Labs., Richland, WA.
|NTIS Title Notes
||Reprint: Climate Change and Isoprene Emissions from Vegetation.
||55C; 55E; 68A; 57C
||PC A03/MF A01