[Proflist] Today, JCSDA Seminar, 2 PM: Al Gasiewski

[George Ohring]

*Note: This seminar will take place in the NCWCP Auditorium.*

  * *

*JCSDA Seminar*

*Title*

*Developments in Radiative Transfer Modeling, Microwave Observing Systems,
and Radiance Assimilation over Clouds***

*Speaker*

*Al Gasiewski
University of Colorado ***

*Date,  Time & Place*

*Wednesday, November 14, 2012
**2:00 – 3:00 PM, Auditorium,* NOAA Center for Weather and Climate
Prediction, 5830 University Research Court, College Park, MD

*Abstract*

Spaceborne passive microwave observations from sensors such as AMSU and
ATMS provide temperature and moisture sounding in both clear air and
non-precipitating clouds, along with indirect determination of rain rate
over heavier precipitating clouds. Improvements in mesoscale forecasting
could be anticipated if such observations were made with higher spatial and
temporal resolution, as possible, for example, from either geostationary
orbit or from a fleet of LEO satellites. While both of these mission
concepts are being studied, there is an associated need to understand how
data from such new observation systems might be used within radiance
assimilation schemes. We discuss in this talk progress in extended Kalman
filtering and radiative transfer modeling applied to the problem of how to
optimally use high time-space resolution passive microwave imagery, and
specifically, the potential for “precipitation locking” of NWP models onto
passive microwave data. It is suggested from ab initio precipitation
locking studies, although not yet proven, that time and space scales of ~15
minutes and ~15 km are needed to maintain small enough model errors in all
fields so as to keep NWP models locked under conditions of mesoscale
convection. The concept of locking will be illustrated through
geostationary microwave observation system simulation experiments. New
developments in fast Jacobian RT modeling and CubeSat based sensor concepts
for facilitating high temporal/spatial measurements will also be discussed.

*Remote Access*

*Video:* 1. Go to JCSDA Seminar <https://star-nesdis-noaa.webex.com/> and
click on the seminar title
2. Enter your name and email address.
3. Enter the meeting password: JCSDAseminars707
4. Click "Join Now".
5. Follow the instructions that appear on your screen.
*Audio: *USA participants: 1-866-715-2479,  Passcode: 9457557
International:                    1-517-345-5260

*Contact*

If you would like to present a seminar contact George.Ohring at noaa.gov

*Seminar Files*

Slides available prior to, and audio recording after, the presentation at
http://www.jcsda.noaa.gov/JCSDASeminars.php
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