The Goddard Earth Sciences Data and Information Services Center (GES DISC) is pleased to announce the release of Version 3 of the Goddard Satellite-based Surface Turbulent Fluxes (GSSTF) Data Set for Global Water and Energy Cycle Research (GSSTF3), in HDF-EOS5 format*, as part of the NASA Making Earth Science Data Records for Use in Research Environments (MEaSUREs) Project. Chung-Lin Shie is Principal Investigator.
In contrast to previous versions, the GSSTF Version 3 is on a 0.25° x 0.25° grid, as well as employing an updated algorithm for surface air humidity retrieval. Similar to the preceding Version 2c GSSTF, a corrected/improved set of Special Sensor Microwave/Imager (SSM/I) Brightness temperatures (Tb) have been used for producing the Version 3 GSSTF. Basically, artificial trends found in the original SSM/I V6 Brightness Temperatures (used previously for producing Version 2b GSSTF), due mainly to the variations/trends of Earth incidence angle (EIA) in the SSM/I satellites, were genuinely removed.
The GSSTF dataset has been widely used by the scientific community for both global energy and water cycle research, and regional and short period data analysis, since its first official release in 2000/2001. Accurate sea surface flux measurements are crucial to understanding the global water and energy cycles. The oceanic evaporation that is a major component of the global oceanic fresh water flux is particularly useful in predicting oceanic circulation and transport. Remote sensing is a valuable tool for global monitoring of these flux measurements. The GSSTF algorithm has been developed and applied to remote sensing research and applications.
Also new in the GSSTF Version 3 are Digital Object Identifiers (DOI) for each Version 3 GSSTF data product. The DOIs are contained in the data files as well as external metadata, and as for the typical DOI application for referencing of publications, provide a permanent identifier and quick reference to the data and online documentation.
All of the GSSTF data types (daily, monthly, climatology, and individual SSM/I satellites daily data) in the HDF-EOS5 format are available, along with documentation, from the Goddard Earth Sciences Data and Information Services Center MEaSUREs Portal (http://disc.sci.gsfc.nasa.gov/measures
Available data access methods and data set descriptions can be accessible through the portals Data Holdings page:
or directly by one of the following methods:
The search and download interface Mirador:
or, using keywords: http://mirador.gsfc.nasa.gov/cgi-bin/mirador/collectionlist.pl?keyword=gsstf+AND+%22Version+3%22
* "HDF" stands for Hierarchical Data Format; "EOS" stands for "Earth Observing System".