Tropospheric Modeling Studies of TRACE-P Field Data:
Regional Assessment of Stratosphere - Troposphere Exchange

  Modeling Strat/Trop Exchange for TRACE-P

Contact Information:
Prof. Matthew H. Hitchman
Department of Atmospheric and Oceanic Sciences
University of Wisconsin - Madison
1225 West Dayton Street
Madison, WI 53706 USA
phone 608/262-4653
608/262-0166
email matt@aos.wisc.edu
FTP URL:  144.92.131.181 ("Andy")

The University of Wisconsin Nonhydrostatic Modeling System (UWNMS) will be used to provide meso- to synoptic scale forecasts of meteorological variables and idealized tracers for flight planning purposes, as well as post-mission for interpretation of observations.  The model was constructed and is maintained by Professor Greg Tripoli.  It has been used for field support for the POLARIS and SOLVE/THESEO campaigns.  Details of the model may be found at mocha.meteor.wisc.edu. With 400 m vertical resolution and 55 x 55 km horizontal resolution we achieve a 4:1 time compression for a domain spanning 10-50N, 100-170E (includes Lake Baikal, Phillipines, and Sea of Okhotsk).

Our primary product in the field will be one VIS5D file of a 60 hour model forecast using NCEP aviation forecasts on the boundary, to be  made available by 11 am local time the day before each flight. This file will be approximately 60 Mb, downloaded from andy.meteor.wisc.edu (144.92.131.181) by binary ftp to a laptop in the field.  Primary variables in the VIS5D file will include horizontal and vertical winds, temperature, pressure, relative humidity,potential temperature, potential vorticity, and the following tracer fields:

1)      initialized linear decrease from 1 at the surface to 0 at the model top near 24 km,

2)   ozone initialized from aviation model ozone in the stratosphere blended with the Langley PV-correlated ozone in the troposphere provided by Brad Pierce,

3)      same ozone as in 2) but set to zero below the model PV-defined tropopause,

4)      pseudo-CO using monthly mean source and the Langley PV-correlated CO in the troposphere provided by Brad Pierce.

Secondary products will include simulated flight track curtain profiles of selected variables and back trajectory parcel histories intersecting the anticipated flight track.  These secondary products will be created in the field on a near-automatic basis.  We would be ready for discussion by 12 noon local time on the day before each flight.

It would be useful to have a television to show the VIS5D movies from the laptop for flight planning purposes (we will bring the connection hardware).  A color printer, black and white printer on a local network, and an overhead projector  would also be useful for presenting analyses at science team meetings.

For each HongKong flight Marcus Buker, Brad Pierce, and Matt Hitchman will create UWNMS forecasts  to be sent to Duncan Fairlie for interpretation in the field.

For each Yokota flight Marcus Buker and Matt Hitchman will initiate simulations from the field to be run on Andy in Madison, integrating CO and ozone from Brad Pierce, then interpreted in the field by Matt and Marcus.

NASA LaRC / UW Field Products for TRACE-P

Contact: Duncan Fairlie (LaRC)
               t.d.fairlie@larc.nasa.gov
               Tel. 757-864-5818

UW:  Meteorological Forecast Products:

48-hour forecasts from the University of Wisconsin nonhydrostatic modeling system (UW-NMS) valid for flight days and available 24 hours before the flight. Products include temperature, wind, specific humidity, potential vorticity.

     Forecasts of boundary layer and stratosphere airmass tracers.

     Back trajectory meteorological history information from prospective flight track.

LaRC: Isentropic analyses based on NCEP Aviation model (AVN) forecast products, trajectory analysis, 3-D model and satellite climatologies: *

3-D ozone reconstructions based on AVN forecast products, satellite, sonde and DIAL ozone observations, and PV mapping.

     3-D CO reconstructions based on AVN forecast products, backtrajectory calculations, and a 3-D LaRC IMPACT model CO climatology.

  Reverse-domain-filled (RDF) predictions of strain/rotation (Q), potential vorticity (PV), airmass origin (e.g. geographic, boundary layer, stratosphere).

  RDF predictions of CO exposure, based on AVN forecast products and CO source distributions (EDGAR database of industrial emissions/ Galanter et al., 2000, biomass emissions).

************************

Data format:              digital image
Data Volume:            60 Mbytes/day (max)
Data transfer mode:   ftp/ web page download
Field site download:   8:30 am
Onsite analysis time:   3.0 hours (including download time) (estimate)
Onsite display:            laptop/ color printer  (CAVE possible but not required)
Onsite data handler:    Fairlie
Data access:                ftp kelvin.larc.nasa.gov
Requirements:              color  Printer, B/W printer

*************************