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TITLE OF INVESTIGATION: ANALYSIS OF
ASIAN OUTFLOW OVER THE WESTERN
PACIFIC USING OBSERVATIONS FROM TRACE-P
INVESTIGATORS: Daniel J. Jacob (P.I.),
Jennifer A. Logan (Co-I.), Isabelle Bey, Hongyu Liu
(Division of Engineering & Applied Science, Harvard University), Celine
Mari (Laboratoire
d’Aerologie, CNRS, Toulouse, France)
DELIVERABLES.
• Mission scientist. Jacob will serve as mission scientist for TRACE-P.
• Pre-mission 3-D global tropospheric chemistry simulations with the
GEOS-CHEM
model.
We will conduct global
simulations with Feb-Apr 1994 meteorology from the
GEOS-1 assimilation and present results at the first Science Team meeting. An
earlier
simulation with Feb-Apr 1994 meteorology has been evaluated with observations
from the
PEM-West(B) mission. The simulation to be conducted for TRACE-P will have
higher
horizontal resolution (2
o
x2.5
o
)
and will separate CO and ozone tracers from different source
regions.
• Chemical forecasts during the
mission using the GEOS-CHEM global 3-D model and
the Meso-NH mesoscale chemical tracer model. Forecast
meteorological fields will be
from GEOS-3 (2 o x2.5
o resolution)
for the global model and from Meso-NH for the
mesoscale model. The Meso-NH simulations will be done by the Laboratoire d’Aerosologie
in Toulouse. Forecast chemical fields will be posted on the web and will
include CO, ozone,
and NO y tracers
from different sources and source regions.
• Post-mission 0-D photochemical
model analyses of fast chemical
processes controlling
HO x ,
NO x ,
and ozone concentrations along the aircraft flight tracks.
• Post-mission interpretation of the
aircraft observations in terms of contributions from
different anthropogenic, biogenic, and biomass burning source regions to
Asian
outflow. We will place the aircraft
observations in the context of concurrent observations
from satellites (GOME, MOPITT, TOMS) and from ozonesondes, and conduct
statistical
analyses of the aircraft observations using chemical correlations and
meteorological
information (e.g., from backtrajectories). This work will focus on ozone,
greenhouse gases,
and related species.
• Quantitative estimates of the
contributions from different source regions to Asian
chemical outflow using the GEOS-CHEM global 3-D model. This
work will attempt to
bring together the aircraft, satellite, and sonde observations in a
comprehensive and
quantitative analysis of Asian outflow. It will focus on ozone and related
species. It is
supported by NASA/ACMAP.