[Proflist] Joint Center for Satellite Data Assimilation Seminar, Oct 16: Krzysztof Wargan

[George Ohring]

* *

*JCSDA Seminar*

*Title*

*Ozone Data Assimilation***

*Speaker*

*Krzysztof Wargan
**1) NASA/Goddard Space Flight Center/Global Modeling and Assimilation
Office*

*2) Science Systems and Applications Inc.** ***

*Date,  Time & Place*

*Tuesday, October 16, 2012
**2:00 – 3:00 PM, Conference Center*, NOAA Center for Weather and Climate
Prediction, 5830 University Research Court, College Park, MD

*Abstract*

    Assimilation of ozone data is an important and challenging component of
atmospheric data analysis for operational and research purposes. In its
operational analyses, the Global Modeling and Assimilation Office uses
total column ozone data from the Ozone Monitoring Instrument (OMI) on the
EOS Aura satellite and partial ozone columns from Solar Backscatter
Ultraviolet (SBUV) sounders on NOAA platforms. These measurements are
characterized by a relatively coarse vertical resolution of SBUV,
particularly below the ozone peak, and coverage limited to the sunlit
atmosphere.

    In this presentation we will discuss some recent changes introduced to
ozone assimilation in the GEOS-5 Data Assimilation System (GEOS-DAS). We
will describe a state-dependent approach to the background error covariance
modeling and show how this approach leads to significant improvements in
the representation of ozone in the Upper Troposphere and Lower
Stratosphere. The second part of the talk will be devoted to assimilation
of the Microwave Limb Sounder (MLS) data. Unlike the SBUV instruments, MLS
can measure chemical composition and temperature in both day and night and
possesses a much higher vertical resolution. We will show how MLS data can
improve GEOS-DAS analyses and discuss our current work on direct
assimilation of MLS radiance data in spectral bands sensitive to ozone and
temperature.

*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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