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

[Ana Carrion - NOAA Affiliate]

*JCSDA Seminar*

*Title*

*A Severe Weather QuickOSSE to Examine the Impact of Super Constellations
of GPS Radio Occultation Satellites*

*Speaker*

*Mark Leidner*

Atmospheric and Environmental Research (AER)

*Date,  Time & Place*

*August 19, 2015, 2:00pm - 3:00pm*
Conference Center, NOAA Center for Weather and Climate Prediction, 5830
University Research Court, College Park, MD

*Abstract*

In our simulation study, we use the Observing System Simulation Experiment
(OSSE) framework to measure the impact of vastly increased numbers of GNSS
RO profiles on weather analysis and forecasting. Our study focuses on
severe convective weather in the State of Oklahoma, part of the so-called
“tornado alley” because of the frequent bouts of severe weather it
experiences each year. The case of interest is the May 31, 2013 “El Reno”
tornado, because this event produced both an EF3 tornado and flash flooding
in Oklahoma City, Oklahoma. We use the Weather Research and Forecasting
(WRF) model to compute a 2 km nature run, i.e., the “truth” in our study.
And we use a 24-member, physics-based ensemble of 18-km-resolution WRF
models, along with an Ensemble Kalman Filter (EnKF) to blend the simulated
observations with the ensemble mean *a priori* model state vector. We use
the WRF-DART ensemble data assimilation system to manage the hourly,
cycling data assimilation and for its non-local, excess phase observation
operator for RO data.



We simulate future constellations of RO satellites that can produce up to
2.5 million profiles/day globally. We will show analysis and forecast
impacts of greatly increased numbers of RO profiles. The analysis impacts
on lower tropospheric moisture fields in particular will be highlighted, as
well as impacts on convective initiation in the forecasts.

*Remote Access*

*Video:** 1. **Go to **JCSDA Seminar* <https://star-nesdis-noaa.webex.com/>
*2. Enter the event number:* *999 299 037*




* 3. Password is JCSDA 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
*Main Line**: 301-683-3520*
*JCSDA Front Office: 301-683-3615*
Fax: 301-683-3526
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