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Proceedings Paper

AIRS associated accomplishments at the JCSDA: First use of full spatial resolution hyperspectral data show significant improvements in global forecasts
Author(s): J. Le Marshall; J. Jung; S. J. Lord; J. C. Derber; R. Treadon; J. Joiner; M. Goldberg; W. Wolf; H. C. Liu
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Paper Abstract

The National Aeronautics and Space Administration (NASA), National Oceanic and Atmospheric Administration (NOAA), and Department of Defense (DoD), Joint Center for Satellite Data Assimilation (JCSDA) was established in 2000/2001. The goal of the JCSDA is to accelerate the use of observations from earth-orbiting satellites into operational numerical environmental analysis and prediction systems for the purpose of improving weather and oceanic forecasts, seasonal climate forecasts and the accuracy of climate data sets. As a result, a series of data assimilation experiments were undertaken at the JCSDA as part of the preparations for the operational assimilation of AIRS data by its partner organizations1,2. Here, for the first time full spatial resolution radiance data, available in real-time from the AIRS instrument, were used at the JCSDA in data assimilation studies over the globe utilizing the operational NCEP Global Forecast System (GFS). The radiance data from each channel of the instrument were carefully screened for cloud effects and those radiances which were deemed to be clear of cloud effects were used by the GFS forecast system. The result of these assimilation trials has been a first demonstration of significant improvements in forecast skill over both the Northern and Southern Hemisphere compared to the operational system without AIRS data. The experimental system was designed in a way that rendered it feasible for operational application, and that constraint involved using the subset of AIRS channels chosen for operational distribution and an analysis methodology close to the current analysis practice, with particular consideration given to time limitations. As a result, operational application of these AIRS data was enabled by the recent NCEP operational upgrade. In addition, because of the improved impact resulting from use of this enhanced data set compared to that used operationally to date, provision of a realtime "warmest field" of view data set has been established for use by international NWP Centers.

Paper Details

Date Published: 29 August 2005
PDF: 7 pages
Proc. SPIE 5890, Atmospheric and Environmental Remote Sensing Data Processing and Utilization: Numerical Atmospheric Prediction and Environmental Monitoring, 58900O (29 August 2005); doi: 10.1117/12.615757
Show Author Affiliations
J. Le Marshall, Joint Ctr. for Satellite Data Assimilation (United States)
J. Jung, Joint Ctr. for Satellite Data Assimilation (United States)
S. J. Lord, Joint Ctr. for Satellite Data Assimilation (United States)
J. C. Derber, Joint Ctr. for Satellite Data Assimilation (United States)
R. Treadon, Joint Ctr. for Satellite Data Assimilation (United States)
J. Joiner, Joint Ctr. for Satellite Data Assimilation (United States)
M. Goldberg, Joint Ctr. for Satellite Data Assimilation (United States)
W. Wolf, Joint Ctr. for Satellite Data Assimilation (United States)
H. C. Liu, Joint Ctr. for Satellite Data Assimilation (United States)


Published in SPIE Proceedings Vol. 5890:
Atmospheric and Environmental Remote Sensing Data Processing and Utilization: Numerical Atmospheric Prediction and Environmental Monitoring
Hung-Lung Allen Huang; Hal J. Bloom; Xiaofeng Xu; Gerald J. Dittberner, Editor(s)

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