Forecasting
of Tracer Fields During TRACE-P with the Global Climate Model
ECHAM
Johann
Feichter, Martin Schultz, and Hans-Stefan
Bauer
Max-Planck-Institut für Meteorologie, Hamburg, Germany
Project
Description
1. Realtime forecast
simulations during the TRACE-P deployment phase
We will perform real-time forecast simulations
of global meteorological and tracer fields with the general circulation
model ECHAM for two weeks prior and during the field deployment
of TRACE-P. The simulations shall be based on ECMWF forecast fields
and will be performed in T106 resolution (~ 1° x
1°) with 19 vertical levels
from the surface to 10 hPa.
Standard maps and animated sequences shall be
automatically generated prior to each flight, and they will be
made available for use in the field in order to assist the science
team in detailed flight planning. It is planned that one scientist
from the Max-Planck-Institute will accompany the DC-8 aircraft
to all major bases of operation for this purpose. We will provide
the following products with a 6-hour time resolution at the surface,
750 mbar, 500 mbar, and 300 mbar (additional products can be requested):
-
geopotential
height
-
specific
humidity
-
wind
vectors
-
potential
vorticity
-
tracer
concentrations of pseudo CO and pseudo acetylene (same emission
fields as CO in atmospheric CTM, constant lifetime of 30 days
and 5 days, respectively)
-
concentrations
of CO tracer labeled according to source region (East Asia,
West Asia, Europe, US, elsewhere)
-
Radon
concentrations
In order to reduce internet traffic, these products
shall be generated in Hamburg and downloaded to the field site
as GIF or JPEG images. We will also try to make animated sequences
available if feasible.
2.
Model study of the budgets of ozone and nitrogen oxides in the
TRACE-P region
After the mission is completed, we will perform
simulations with the chemical transport model MOZART (using analyzed
winds from ECMWF) and we will analyze the budgets of ozone and
nitrogen oxides in the TRACE-P region. These simulations will also
be performed in T106 resolution, and tracers (e.g. CO) will again
be marked according to their region of origin. The model results
will be made available to the science team as global fields and
sampled along the flight tracks of both aircraft. The evaluation
of the simulated tracer fields shall be performed in close collaboration
with the experimentalists from the science team.
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