[Proflist] JCSDA Seminar, May 16: Karbou

[George Ohring]

Note: Access to the WebEx webcast is limited to the first 25 participants.
If you are locked out, don't despair; the slides are at
http://www.jcsda.noaa.gov/JCSDASeminars.php
Colleagues in the same office are encouraged to share the WebEx connection.
Participants in the conference call are urged to mute their telephones or
maintain absolute silence in their rooms.

* *

*JCSDA Seminar*

*Title*

*The Assimilation of Surface Sensitive Microwave Observations Over Land:
Recent Results and Open Issues***

*Speaker*

*Fatima Karbou ***

*Météo France***

*Date,  Time & Place*

*Wednesday, May 16, 2012
2:00 – 3:00 PM, *World Weather Building, *Room 707*, 5200 Auth Road, Camp
Springs, MD 20746

*Abstract*

 One of the many scientific challenges in the field of numerical weather
prediction is to extract useful information on the atmospheric boundary
layer using observations from remote sensing microwave instruments such as
AMSU-A, AMSU-B/MHS or SSMIS. These data contribute increasingly to improve
short to medium range forecasts, but also to improve re-analyses. Better
use of these data often requires appropriate representation of the surface
in the models, in both emissivity and temperature. This is achieved over
sea, and satellite data have a tremendous impact on the atmospheric
analyses over oceans. Over land, the surface emissivity is highly variable
and may cause biases in the forward model if its temporal and spatial
variability are not well taken into account. In such a situation, the model
cannot produce realistic simulations of observations sensitive to the
surface and may reject useful observations, including those not sensitive
to the surface. This case concerns in particular the land and sea ice
surfaces for which the surface emissivity is particularly challenging to
model. During the seminar, some of the work carried out at Météo-France for
a better description of the emissivity of land and sea ice surfaces will be
summarized. The methodology used for estimating the emissivity in the model
and its impact on the performance of the radiative transfer model will be
presented. The impact of a proper modeling of the land and sea ice
emissivity, in terms of forecast skill and quality of analyses, will be
discussed.

*Remote Access*

*Video:* 1. Go to JCSDA
Seminar<https://star-nesdis-noaa.webex.com/mw0305l/mywebex/default.do?siteurl=star-nesdis-noaa>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 the day before and audio recording the day after the
presentation at  http://www.jcsda.noaa.gov/JCSDASeminars.php




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