[Proflist] Today, 2 PM, Joint Center for Satellite Data Assimilation Seminar: Kalnay

[Ana Carrion - NOAA Affiliate]

* *

*JCSDA Seminar*

*Title*

*Estimation of Surface Fluxes of Carbon and Heat from Atmospheric Data
Assimilation***

*Speaker*

*Eugenia Kalnay
*Distinguished University Professor
Department of Atmospheric and Oceanic Science
University of Maryland

*Date,  Time & Place*

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

*Abstract*

       We succeeded in estimating surface CO2 fluxes at the model
grid-scale resolution by assimilating meteorological variables and CO2
simultaneously every 6 hours with the Local Ensemble Transform Kalman
Filter (LETKF).  This was done as an observing system simulation experiment
(OSSE) using the SPEEDY AGCM coupled with the LETKF-C. The (unmeasured)
surface fluxes are estimated with the state vector augmentation method, as
if they were evolving model parameters. The simultaneous ensemble Kalman
filter data assimilation allows considering the transport errors on
atmospheric CO2 forecast. Taking a short window (6hr) rather than the very
long windows (months) normally used in inversion methods avoids blurring
the impact of the surface fluxes on the near surface CO2.

       The LETKF-C, including several advanced techniques that were
developed within this research (Kang et al., JGR 2011, JGR 2012) will be
discussed. We also explored the possibility of estimating surface fluxes of
heat, moisture and momentum using the same methodology, and OSSE
experiments are also encouraging. Based on these results, we coupled our
LETKF-C data assimilation system with the NCAR CAM 3.5 model and
preliminary results are very good.

*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. No password is necessary
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 Kevin.Garrett at noaa.gov

*Seminar Files*

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


-- 

*Ana Carrion*
National Oceanic and Atmospheric Administration
Program Support Specialist
Riverside (RTi) at NOAA/NESDIS/STAR/JCSDA
NCWCP, E/RA, Room #2600
5830 University Research CT
College Park, MD 20740-3818

Email: Ana.Carrion at noaa.gov
*JCSDA Main: 301-683-3615*
*Direct: 301-683-3520*
Fax: 301-683-3526
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://mailman.ucar.edu/pipermail/proflist/attachments/20130814/15ea8a7e/attachment.html