[Proflist] Today, 1:30 PM, Joint Center for Satellite Data Assimilation Seminar: Jeff Steward

[Ana Carrion - NOAA Affiliate]

---------- Forwarded message ----------
From: Ana Carrion - NOAA Affiliate <ana.carrion at noaa.gov>
Date: Tue, Apr 29, 2014 at 10:03 AM
Subject: Joint Center for Satellite Data Assimilation Seminar, May 6th:
Jeff Steward
To: Kevin Garrett - NOAA Affiliate <Kevin.Garrett at noaa.gov>
Cc: Ana Carrion <ana.carrion at noaa.gov>




*JCSDA Seminar*

*Title*

*Uncertainties in Forward Passive Microwave Brightness Temperatures and
What to Do about Them*

*Speaker*

*Jeff Steward*

UCLA, Joint Institute for Regional Earth System Science and Engineering

*Date,  Time & Place*

*Tuesday, May 6, 2014 1:30-2:30 PM*
Conference Center, NOAA Center for Weather and Climate Prediction, 5830
University Research Court, College Park, MD

*Abstract*

Forward simulations of cloudy satellite radiances are fraught with
uncertainty especially in the microwave regime. The scattering parameters
that determine satellite brightness temperatures critically depend on
complex, unknown size and shape distributions of liquid and solid
hydrometeors. These uncertainties can lead to differences of 50 K or more
in forward calculations alone, and therefore this issue must be addressed
before attempting to assimilate this data into operational models. In this
talk, I will quantify some of the various sources of uncertainty in passive
microwave radiances (e.g. TRMM/TMI). I will also present an elegant method
we have developed at UCLA and JPL to assimilate these uncertain
observations. This method is based upon statistical inference using the
directions of the most certain correlations. The uncertain directions can
be neglected, thus reducing the order of the problem as well as
regularizing the mapping. The observation error covariance formulation also
becomes straightforward and elegant. We present the encouraging results of
our microwave brightness temperatures simulation in both 1D-Var and
Ensemble Kalman Filter frameworks.

*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 #2652
5830 University Research CT
College Park, MD 20740-3818

Email: Ana.Carrion at noaa.gov
*JCSDA Front Office: 301-683-3615*
*STAR Front Office: 301-683-3485*
*Direct: 301-683-3520*
Fax: 301-683-3526




-- 

*Ana Carrion*
National Oceanic and Atmospheric Administration
Program Support Specialist
Riverside (RTi) at NOAA/NESDIS/STAR/JCSDA
NCWCP, E/RA, Room #2652
5830 University Research CT
College Park, MD 20740-3818

Email: Ana.Carrion at noaa.gov
*JCSDA Front Office: 301-683-3615*
*STAR Front Office: 301-683-3485*
*Direct: 301-683-3520*
Fax: 301-683-3526
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