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All seminars > Upcoming 2008 JCSDA Seminars

Seminars:                           
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June 2008

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How to Attend or Participate Remotely

  • Unless noted otherwise, all seminars take place at:

    World Weather Building
    Science Center
    5200 Auth Road
    Camp Springs, MD  20746

  • Off-site participants may listen to seminars via conference call. Conference call dial-in numbers will be posted in the seminar listing below at least 2 days before the talk takes place.
  • Slides for each presentation should be available for download in PDF format the day before each talk, and are posted with the listings below as well.
  • Unless specifically noted otherwise, the points of contact for the JCSDA seminar series are:

For Presenters

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


Title

Bias of North American Mesocale (NAM) Model Forecasts of Summer Rainfall over Central U.S., and Impact of FORMOSAT-3/COSMIC Observations on Global Forecast System (GFS) Predictions in the Northern Hemisphere

Presentation (PDF, 9MB)

Speaker Shih-Yu (Simon) Wang
Dept. of Geological and Atmospheric Sciences, Iowa State University
Date Tuesday, June 3, 2008, 10:00-11:00 a.m.
Abstract

Show Abstract

It is known that operational mesoscale forecast models do not perform well on propagating summer rainfall over the central United States. Such precipitation characteristics are coupled with subsynoptic-scale perturbations embedded in the midtropospheric flows. Analysis of the North American Mesoscale model (NAM) forecasts found that the model tends to generate the perturbations with a propagation speed that is too slow. The speed bias results in displaced rainfall forecasts.

The GFS assimilation of FORMOSAT-3/COSMIC data in an experimental run during summer 2006 was evaluated. The diagnostic analysis was focused on the global stationary wave structure in the Northern Hemisphere. Results show that large impacts of the FORMOSAT- 3/COSMIC observations are mainly distributed over the major mountain ranges and the western tropical Pacific warm pool. Water vapor flux convergence is found to be enhanced over the warm pool region, resulting in more precipitation in the GFS forecasts.

Location World Weather Building, Conference Room 707


Title

NOAA Plans for Advanced Models and Assimilation Systems
and Implications for Satellite Data

Presentation (PDF, 3MB)

Speaker Dr. Stephen Lord
NOAA / National Centers for Environmental Prediction (NCEP)
Date Friday, June 27, 2008, 2:00 p.m.
Abstract

Show Abstract

Over the past 10 years, and most likely for the next 10 years, the Numerical Weather Prediction (NWP) community has faced, and will be facing, an unprecedented volume of new satellite data available for assimilation into NWP forecast systems. Simultaneously, the NCEP Environmental Modeling Center (EMC) is redesigning the operational suite of forecast systems, aka the NCEP Production Suite, to provide improved information to users and, simultaneously, a software suite capable of supporting a broader diversity of forecast models. This seminar will present a strategic path for the future wherein all these factors are considered.

Dial-In
Numbers
Domestic: 888-395-6878
International: +1-210-234-0008
Passcode: 46913
Location World Weather Building, Conference Room 707

Last modified on June 26, 2008 11:06 AM
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