HR: 17:00h
AN: A14D-05 [Abstracts]
TI: Determination of Biogenic Emissions from Aircraft Measurements During TEXAQS2006 and ICARTT2004 Campaigns and Comparison with Biogenic Emission Inventories
AU: * Warneke, C
EM: carsten.warneke@noaa.gov
AF: NOAA ESRL
Chemical Sciences Division, 325 Broadway, Boulder, CO 80305, United States
AU: * Warneke, C
EM: carsten.warneke@noaa.gov
AF: CIRES
University of Colorado, 216 UCB, Boulder, CO 80305, United States
AU: McKeen, S
EM: Stuart.A.McKeen@noaa.gov
AF: NOAA ESRL
Chemical Sciences Division, 325 Broadway, Boulder, CO 80305, United States
AU: McKeen, S
EM: Stuart.A.McKeen@noaa.gov
AF: CIRES
University of Colorado, 216 UCB, Boulder, CO 80305, United States
AU: de Gouw, J A
EM: Joost.deGouw@noaa.gov
AF: NOAA ESRL
Chemical Sciences Division, 325 Broadway, Boulder, CO 80305, United States
AU: de Gouw, J A
EM: Joost.deGouw@noaa.gov
AF: CIRES
University of Colorado, 216 UCB, Boulder, CO 80305, United States
AU: Del Negro, L
EM: delnegro@lakeforest.edu
AF: Lake Forest College, 555 N. Sheridan Rd., Lake Forest, Il 60045, United States
AU: Brioude, J
EM: Jerome.Brioude@noaa.gov
AF: NOAA ESRL
Chemical Sciences Division, 325 Broadway, Boulder, CO 80305, United States
AU: Brioude, J
EM: Jerome.Brioude@noaa.gov
AF: CIRES
University of Colorado, 216 UCB, Boulder, CO 80305, United States
AU: Stark, H
EM: Harald.Stark@noaa.gov
AF: NOAA ESRL
Chemical Sciences Division, 325 Broadway, Boulder, CO 80305, United States
AU: Stark, H
EM: Harald.Stark@noaa.gov
AF: CIRES
University of Colorado, 216 UCB, Boulder, CO 80305, United States
AU: Trainer, M K
EM: Michael.K.Trainer@noaa.gov
AF: NOAA ESRL
Chemical Sciences Division, 325 Broadway, Boulder, CO 80305, United States
AU: Fehsenfeld, F C
EM: Fred.C.Fehsenfeld@noaa.gov
AF: NOAA ESRL
Chemical Sciences Division, 325 Broadway, Boulder, CO 80305, United States
AU: Fehsenfeld, F C
EM: Fred.C.Fehsenfeld@noaa.gov
AF: CIRES
University of Colorado, 216 UCB, Boulder, CO 80305, United States
AU: Wiedinmyer, C
EM: christin@ucar.edu
AF: NCAR ACD, 1850 Table Mesa DR, Boulder, CO 80307, United States
AU: Vanchindorj, U
EM: vulziisa@ucar.edu
AF: NCAR ACD, 1850 Table Mesa DR, Boulder, CO 80307, United States
AU: Guenther, A B
EM: guenther@ucar.edu
AF: NCAR ACD, 1850 Table Mesa DR, Boulder, CO 80307, United States
AB:
Isoprene and monoterpenes were measured with a PTR-MS instrument onboard the NOAA WP-3 aircraft during
the TEXAQS2006 and ICARTT2004 campaigns. Isoprene emission fluxes are estimated using a mixed boundary
layer approach, which takes the isoprene lifetime into account. The results are directly compared to the EPA BEIS-
3 inventory (EPA Biogenic Emissions Inventory System). In addition, the EPA BEIS-3 data were incorporated in a
Lagrangian particle dispersion model (FLEXPART) and the mixing ratios calculated from the model are
compared to the measurements. This model calculation takes transport, but not chemistry into account and can
also be used to determine the transport of isoprene and its oxidation products over several hours.
Both methods indicate that EPA BEIS-3 overestimates the emission fluxes estimated from the aircraft
measurements. The difference is dependent on the day and the location but for all flights an agreement to better
than a factor of two was found. Clear discrepancies were observed for specific locations, such as some forested
areas north-west of Houston, Texas, or at the border between Canada and the US in the New England area.
Other isoprene emission inventories were also compared to the emission fluxes estimated from the aircraft
measurements. An inventory compiled by Wiedinmyer et al. for the Texas area using different land cover data
clearly improved the comparison.
The emission fluxes estimated from the measurements are also compared to the Model of Emissions of Gases
and Aerosols from Nature (MEGAN).
DE: 0315 Biosphere/atmosphere interactions (0426, 1610)
DE: 0322 Constituent sources and sinks
DE: 0365 Troposphere: composition and chemistry
SC: Atmospheric Sciences [A]
MN: 2007 Fall Meeting