HR: 17:30h
AN: A14D-07 [Abstracts]
TI: Reconciling bottom-up, top-down, and direct measurements of biogenic VOC emissions
AU: * Guenther, A
EM: guenther@ucar.edu
AF: NCAR, 1850 Table Mesa Drive, Boulder, CO 80027, United States
AU: Karl, T
EM: tomkarl@ucar.edu
AF: NCAR, 1850 Table Mesa Drive, Boulder, CO 80027, United States
AU: Wiedinmyer, C
EM: christin@ucar.edu
AF: NCAR, 1850 Table Mesa Drive, Boulder, CO 80027, United States
AU: Barkley, M
EM: michael.barkley@ed.ac.uk
AF: University of Edinburgh, King's Buildings
West Mains Road, Edinburgh, EH9 3JW, United Kingdom
AU: Palmer, P
EM: pip@ed.ac.uk
AF: University of Edinburgh, King's Buildings
West Mains Road, Edinburgh, EH9 3JW, United Kingdom
AU: Muller, J F
EM: jfm@aeronomie.be
AF: Belgian Institute for Space Aeronomy, Avenue Circulaire 3, Brussels, B-1180, Belgium
AU: Stavrakov, T
EM: jenny@aeronomie.be
AF: Belgian Institute for Space Aeronomy, Avenue Circulaire 3, Brussels, B-1180, Belgium
AU: Millet, D
EM: millet@eps.harvard.edu
AF: Harvard University, Pierce Hall, 29 Oxford St., Cambridge, MA 02138, United States
AB:
Biogenic Volatile Organic compound (BVOC) emissions vary considerably on spatial scales ranging from a few
meters to thousands of kilometers and temporal scales ranging from seconds to years. Accurate estimates of
BVOC emissions are required for many regional air quality modeling studies and global earth system
investigations. We compare results from bottom-up estimates, using The Model of Emissions of Gases and
Aerosols from Nature (MEGAN), with top-down estimates, based on satellite and in-situ concentration
distributions, and direct flux measurements. We describe examples of both agreement and disagreement in U.S.,
tropical forest and other landscapes and discuss potential explanations for differences that can exceed a factor
of 2. Future measurement and modeling needs are outlined and specific activities are proposed to improve
efforts to reconcile these approaches and understand the controlling processes.
DE: 0312 Air/sea constituent fluxes (3339, 4504)
DE: 0315 Biosphere/atmosphere interactions (0426, 1610)
SC: Atmospheric Sciences [A]
MN: 2007 Fall Meeting