[Proflist] REMINDER: Joint Center for Satellite Data Assimilation Seminar, September 17th: Thomas Auligne

[Ana Carrion - NOAA Affiliate]

*JCSDA Seminar*

*Title*

*Analysis and Prediction of Clouds Using Satellite All-Sky Radiances:
Lessons Learned and Perspectives*

*Speaker*

*Thomas Auligné*

NCAR, Earth System Laboratory Mesoscale and Microscale Meteorology Division

*Date,  Time & Place*

*September 17, 2014 - 2:00pm*
Conference Center, NOAA Center for Weather and Climate Prediction, 5830
University Research Court, College Park, MD

*Abstract*

The initialization of cloud parameters is one of the main frontiers for
improving short-term prediction skills in numerical weather prediction
(NWP) models. We will present the latest developments at the National
Center for Atmospheric Research (NCAR) in building a capability to
accurately initialize cloud parameters based on all-sky satellite
observations assimilated in the Weather Research and Forecasting (WRF)
numerical model. Two approaches have been considered:



1) A nowcasting system with a simplified cloud fraction. The analysis is
designed to closely fit radiance observations and the NWP model dynamically
transports clouds without involving the physics. This method is
computationally efficient and useful for short-term forecast since it does
not suffer from the typical imbalances often associated with model
re-initializations.



2) A multivariate analysis including the microphysics parameters. It relies
on a hybrid ensemble/variational data assimilation system with an augmented
control variable for clouds. Specific developments to address
non-linearities in the observation operator and non-Gaussian error
distributions will be presented. We will also introduce original algorithms
to correct for position errors and estimate the analysis error within the
variational data assimilation system.



The current analysis shows a sustained impact on cloud forecast, yet there
are still many challenges data assimilation will need to address to
optimize the use of satellite all-sky observations.

*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 Erin.Jones 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 *
*Main Line: 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 *
*Main Line: 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 *
*Main Line: 301-683-3520*
Fax: 301-683-3526
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://mailman.ucar.edu/pipermail/proflist/attachments/20140916/13d96f3c/attachment.html