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Attend in Person:

Unless noted otherwise, all seminars take place at:
NOAA Center for Weather and Climate Prediction
5830 University Research Court
College Park, MD  20740

NCWCP building

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Attend Remotely:

Online video access:

  1. Click on JCSDA Seminars
  2. Select the seminar you wish to attend.
  3. Enter your name and e-mail address.
  4. Click "Join Now".
  5. Follow the instructions that appear on your screen.

Audio / conference call:

USA participants: 1-866-715-2479
Passcode: 9457557
International: 1-517-345-5260


Presenters:

If you are a presenter and are going to be giving a JCSDA seminar with slides, please follow these guidelines on presentation file preparation.

Upcoming JCSDA Seminars

About JCSDA's Seminar Series

The JCSDA seminar series includes presentations on satellite observing instruments, radiative transfer models for use in satellite data assimilation, algorithms for deriving information on the Earth's atmosphere, oceans, and land surface from satellite observations, advances in data assimilation techniques, preparations for assimilation of data from new satellite instruments, and impacts of satellite data on weather and climate predictions. The seminars are about 1 hour in duration (including discussion period) and are held monthly, usually on the 3rd Wednesday of each month at 2 PM, and are open to the public.

The audience for the seminars generally consists of remote sensing researchers from NOAA/NESDIS, data assimilation experts and modelers from NOAA/NCEP and NASA/Goddard Space Flight Center Global Modeling and Assimilation Office, and students/faculty from the University of Maryland.

  • Slides for each presentation should be available for download in PDF format on this page, the day before each talk.
  • Unless specifically noted otherwise, the contact for the JCSDA seminar series is Kevin Garrett.

Upcoming Seminars


Title

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

Presentation file posted here when available.

Speaker Jeff Steward
UCLA, Joint Institute for Regional Earth System Science and Engineering
Date Tuesday, May 6, 2014
1:30 p.m. - 2:30 p.m.
Conference Center, NOAA Center for Weather and Climate Prediction,5830 University Research Court, College Park, MD
Abstract

Show 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 and click on the seminar title
2. Enter your name and email address.
3. Click "Join Now".
4. Follow the instructions that appear on your screen.
Audio: USA participants: 1-866-715-2479, Passcode: 9457557
International: 1-517-345-5260
Contact

Kevin Garrett



Title

Correcting for Position Errors in Variational Data Assimilation

Presentation file posted here when available.

Speaker Thomas Nehrkorn and Ross Hoffman
AER
Date Tuesday, September 16, 2014
2:00 p.m. - 3:00 p.m.
Conference Center, NOAA Center for Weather and Climate Prediction,5830 University Research Court, College Park, MD
Abstract

Show Abstract

Check back later for abstract.

Remote Access Video: 1. Go to JCSDA Seminar and click on the seminar title
2. Enter your name and email address.
3. Click "Join Now".
4. Follow the instructions that appear on your screen.
Audio: USA participants: 1-866-715-2479, Passcode: 9457557
International: 1-517-345-5260
Contact

Kevin Garrett




Most seminars are scheduled on Wednesdays at 2:00 p.m. unless noted otherwise. Titles are tentative, and are subject to change.

Modified February 12, 2014 11:02 PM
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