Meteorological analysis for TRACE-P
at MIT
Y. Zhu and R.E.Newell
The group at MIT (represented by Prof. Newell) will provide
the basic meteorological analysis for the field experiments,
using the 61-level ECMWF analysis data and forecasting data up
to 72 hours. The datasetsdo not include the geopotential heights
on the pressure levels. The height coordinate in the cross-sections
will be calculated from the hydrostatic equation.
The basic fields we will provide by maps include:
Maps of ECMWF streamlines and wind vectors on 1005hPa,
857hPa, 692hPa, 500hPa, 288hPa and 202hPa.
Maps of ECMWF Ozone on 1005hPa, 500hPa, 288hPa, 113hPa,
96hPa and 80hPa. We may alter the levels when in the field.
Maps of ECMWF specific humidity on 1005hPa, 857hPa, 500hPa
and 288hPa.
Maps of ECMWF vertical velocity on 843hPa, 519hPa and
303hPa.
Maps of potential vorticity, pressure and wind vectors
on 305K, 315K, 325K, 335K, 345K and 355K.
Maps of divergent wind on 1005hPa and 202hPa.
Maps of streamfunction and rotational wind on 1005hPa
and 202hPa.
We may also provide the temperature maps at various pressure
levels, and the mean see level pressure map.
The levels of these maps may be change according to the
requests in the field. We
may also add the analysis for other fields if suggested afterwards.
The cross-sections of zonal wind, meridional wind, relative humidity,
temperature, potential vorticity and potential temperature and
ozone along flight tracks will be provided also.
All the figures are in PS format, and about 250mb per
day if only the 24h, 48h and 72 h forcasts are included. Another
80mb may be added if we provide also the forcasts of 36h and
60h. The maps of mean sea level pressure, PV and vertical velocity
are in color. All the maps will be sent to ftp-gte.larc.nasa.gov
by FTP. The figures may also be sent by FAX if no internet computer
available.
We receive the ECMWF data twice a day. The 00Z data come
at 13:15pm EST, and the 12Z data together with the forecasting
data do not arrive until 17:15pm EST. The maps for 00Z can be
completed and sent out around 14:30pm EST, and 12Z analysis maps
will be sent out around 19:00pm EST and forecasting maps will
be about 23:00pm EST. David Westberg will collect these data
in the field.
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