Surface Turbulent Fluxes, 1x1 deg Daily Grid, Set1 and Set2
Entry ID: GES_DISC_GSSTF_2b

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Summary
Abstract: These data are the Goddard Satellite-based Surface Turbulent Fluxes Version-2b (GSSTF2b) Dataset recently produced through a MEaSURES funded project led by Dr. Chung-Lin Shie (UMBC/GEST, NASA/GSFC), converted to HDF-EOS5 format. The stewardship of this HDF-EOS5 dataset is part of the MEaSUREs project, http://earthdata.nasa.gov/our-community/community-data-system-programs/measures-projects/surface-turbulent-fluxes-esdr
http://earthdata.nasa.gov/our-community/community-data-system-programs/measures-projects

This is the Daily (24-hour) product; data are projected to equidistant Grid that covers the globe at 1x1 degree cell size, resulting in data arrays of 360x180 size.

The daily temporal and one-degree spatial resolution of the product can be used to examining climate variability at these scales. The global water cycle's provision of water to terrestrial storage, reservoirs, and rivers rests upon the global excess of evaporation to precipitation over the oceans. Variations in the magnitude of this ocean evaporation excess will ultimately lead to variations in the amount of freshwater that is transported (by the atmosphere) and precipitated over continental regions. The air-sea fluxes of momentum, radiation, and freshwater (precipitation-evaporation) play a very essential role in a wide variety of atmospheric and oceanic problems (e.g., oceanic evaporation contributes to the net fresh water input to the oceans and drives the upper ocean density structure and consequently the circulation of the oceans). Information on these fluxes is crucial in understanding the interactions between the atmosphere and oceans, global energy, and water cycle variability, and in improving model simulations of climate variations.

The GSSTF, Version 2b, daily fluxes have first been produced for each individual available SSM/I satellite tapes (e.g., F08, F10, F11, F13, F14 and F15). Then, the Combined daily fluxes are produced by averaging (equally weighted) over available flux data/files from various satellites. These Combined daily flux data are considered as the "final" GSSTF, Version 2b, and are stored in this HDF-EOS5 collection.

There are two sets of GSSTF, Version 2b, Combined data, "Set1" and "Set2". They are different for being produced using a different combination of individual satellite products. Set1/Set2 may contain a larger/smaller global temporal trend in latent heat flux, but with less/more missing data. They are stored together in the HDF-EOS5 files, under two separate Grids, SET1 and SET2.


Each set (grid) contains 9 variables:

"E" 'latent heat flux' (W/m**2),
"STu" 'zonal wind stress' (N/m**2),
"STv" 'meridional wind stress' (N/m**2),
"H" 'sensible heat flux' (W/m**2),
"Qair" 'surface air (~10-m) specific humidity' (g/kg),
"WB" 'lowest 500-m precipitable water' (g/cm**2),
"U" '10-m wind speed' (m/s),
"DQ" 'sea-air humidity difference' (g/kg)
"Tot_Precip_Water" 'total precipitable water' (g/cm**2)

The double-quoted labels are the short names of the data fields in the HDF-EOS5 files.

The "individual" daily flux data files, produced for each individual satellite, are also available in HDF-EOS5, although from different collections:
GES_DISC_GSSTF_xxx_2b, where xxx are the individual satellites (F08, F10, etc..)

The input data sets used for this recent GSSTF production include the upgraded and improved datasets such as the Special Sensor Microwave Imager (SSM/I) Version-6 (V6) product of brightness temperature [Tb], total precipitable water [W], and wind speed [U] produced by the Wentz of Remote Sensing Systems (RSS), as well as the NCEP/DOE Reanalysis-2 (R2) product of sea skin temperature [SKT], 2-meter air temperature [Tair], and sea level pressure [SLP]. Relevant to this MEaSUREs project, these are converted to HDF-EOS5, and are stored in the GES_DISC_GSSTF_NCEP_2b collection.

Please use these products with care and proper citations, i.e., properly indicating your applications with, e.g., "using the combined 2001 data file of Set1 (or Set2)" or "using the 2001 F13 data file".

The GSSTF Version 2b was originally released in binary format, and more details on the methodology, and relevant references, can be found here:
ftp://meso-a.gsfc.nasa.gov/pub/shieftp/fluxdata/Shie-et-al-COAA2010.pdf
ftp://meso-a.gsfc.nasa.gov/pub/shieftp/fluxdata/Shie-et-al-AAS2009.pdf

The previous GSSTF dataset (GSSTF2) has been widely used by scientific communities for global energy and water cycle research and regional and short period data analysis since its official release in 2000/2001. Accurate sea surface fluxes 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 to 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. We are looking forward to serving the scientific communities with another useful dataset in GSSTF2b.


APPENDIX SET1
---------------
The following list summarizes individual satellites used to produce the Combined SET1.

(1) Y1987/:
F08/
1987/07-12: F08 (Note: 1987/12 is filled with missing value due to data scarcity)

(2) Y1988/:
F08/
1988/01-12: F08

(3) Y1989/:
F08/
1989/01-12: F08

(4) Y1990:
F08/ F10/
1990/01-12: F08 (Note: F10 started in 1990/12, but N/A due to data scarcity)

(5) Y1991/:
F08/ F10/
1991/01-12: F08+F10

(6) Y1992/:
F10/ F11/
1992/01-12: F10+F11

(7) Y1993/:
F10/ F11/
1993/01-12: F10+F11

(8) Y1994/:
F10/ F11/
1994/01-12: F10+F11

(9) Y1995/:
F10/ F11/ F13/
1995/01-12: 01-04: F10+F11
05-12: F10+F11+F13

(10) Y1996/:
F10/ F11/ F13/
1996/01-12: F10+F11+F13

(11) Y1997/:
F10/ F11/ F13/ F14/
1997/01-12: 01-04: F10+F11+F13
05/01-11/14: F10+F11+F13+F14
11/15-12/31: F11+F13+F14

(12) Y1998/:
F11/ F13/ F14/
1998/01-12: F11+F13+F14

(13) Y1999/:
F11/ F13/ F14/
1999/01-12: F11+F13+F14

(14) Y2000/:
F11/ F13/ F14/ F15/
2000/01-12: 01/01-05/16: F11+F13+F14+F15
05/17-12/31: F13+F14+F15

(15) Y2001/:
F13/ F14/ F15/
2001/01-12: F13+F14+F15

(16) Y2002/:
F13/ F14/ F15/
2002/01-12: F13+F14+F15

(17) Y2003/:
F13/ F14/ F15/
2003/01-12: F13+F14+F15

(18) Y2004/:
F13/ F14/ F15/
2004/01-12: F13+F14+F15

(19) Y2005/:
F13/ F14/ F15/
2005/01-12: F13+F14+F15

(20) Y2006/:
F13/ F14/ F15/
2006/01-12: F13+F14

(21) Y2007/:
F13/ F14/ F15/
2007/01-12: F13+F14

(22) Y2008/:
F13/ F14/ F15/
2008/01-12: 01-07: F13+F14
08-12: F13

Special notes:

(a) For Y2006, Y2007 and Y2008, the current Combined daily data files do not include the F15 Individual daily data files due to problematic calibration in F15. The Combined daily files will be updated for those three years once an improved set of Individual daily data files are produced using corrected and updated SSM/I F15 input files.

(b) The current Combined daily data files are produced with at most 4 combined satellites,
i.e., F10, F11, F13 and F14 for May-Nov 1997,
and F11, F13, F14 and F15 for Jan-May 2000.



APPENDIX SET2
---------------
The following list summarizes individual satellites used to produce the Combined SET2. Note that there are many instances where SET2=SET1. The HDF-EOS5 collection contains dedicated flag that reflects that, "Set2eqSet1".
(1) Y1987/: (same as Set1)
F08/
1987/07-12: F08 (Note: 1987/12 is filled with missing value due to data scarcity)

(2) Y1988/: (same as Set1)
F08/
1988/01-12: F08

(3) Y1989/: (same as Set1)
F08/
1989/01-12: F08

(4) Y1990: (same as Set1)
F08/ F10/
1990/01-12: F08 (Note: F10 started in 1990/12, but N/A due to data scarcity)

(5) Y1991/:
F08/ F10/
* 1991/01, 02, 04: F08 only
1991/other months: F08+F10

(6) Y1992/: (same as Set1)
F10/ F11/
1992/01-12: F10+F11

(7) Y1993/: (same as Set1)
F10/ F11/
1993/01-12: F10+F11

(8) Y1994/: (same as Set1)
F10/ F11/
1994/01-12: F10+F11

(9) Y1995/: (same as Set1)
F10/ F11/ F13/
1995/01-12: 01-04: F10+F11
05-12: F10+F11+F13

(10) Y1996/: (same as Set1)
F10/ F11/ F13/
1996/01-12: F10+F11+F13

(11) Y1997/:
F10/ F11/ F13/ F14/
1997/01-12: 01-03: F10+F11+F13
* 04: F10+F13
05-11: F10+F11+F13+F14
* 12: F11+F14

(12) Y1998/:
F11/ F14/
* 1998/01-12: F11+F14 only

(13) Y1999/:
F11/ F14/
* 1999/01-12: F11+F14 only

(14) Y2000/:
F11/ F14/
2000/01-12: * 01-04: F11+F14 only
* 05-12: F14 only

(15) Y2001/:
F14/
* 2001/01-12: F14 only

(16) Y2002/:
F14/
* 2002/01-12: F14 only

(17) Y2003/:
F14/
* 2003/01-12: F14 only

(18) Y2004/:
F14/
* 2004/01-12: F14 only

(19) Y2005/:
F14/
* 2005/01-12: F14 only

(20) Y2006/:
F14/
* 2006/01-12: F14 only

(21) Y2007/:
F14/
* 2007/01-12: F14 only

(22) Y2008/:
F13/ F14/
2008/01-12: * 01-07: F14 only
08-12: F13

Related URL
Link: GET DATA > MIRADOR
Description: Search, visualize, subset, and download data in HDF-EOS5


Link: VIEW RELATED INFORMATION
Description: The data as originally organized in binary format.


Link: VIEW RELATED INFORMATION > USER'S GUIDE


Geographic Coverage
 N: 90.0 S: -90.0  E: 180.0  W: -180.0

Data Set Citation
Dataset Originator/Creator: Chung-Lin Shie, Long Chiu, Robert Adler, I-I Lin, Eric J. Nelkin, Joe Ardizzone
Dataset Title: Surface Turbulent Fluxes, 1x1 deg Daily Grid, Set1 and Set2
Dataset Release Place: Greenbelt, MD, USA
Dataset Publisher: Goddard Earth Science Data and Information Services Center (GES DISC)
Version: 2b
Data Presentation Form: Digital Science Data


Temporal Coverage
Start Date: 1988-07-09
Stop Date: 2008-12-31


Location Keywords
GEOGRAPHIC REGION > GLOBAL OCEAN


Data Resolution
Latitude Resolution: 1 degree
Longitude Resolution: 1 degree
Temporal Resolution: 24 hr


Science Keywords
ATMOSPHERE >ATMOSPHERIC PRESSURE >SEA LEVEL PRESSURE    [Definition]
ATMOSPHERE >ATMOSPHERIC TEMPERATURE >AIR TEMPERATURE    [Definition]
ATMOSPHERE >ATMOSPHERIC TEMPERATURE >SKIN TEMPERATURE    [Definition]
ATMOSPHERE >ATMOSPHERIC TEMPERATURE >SURFACE AIR TEMPERATURE    [Definition]
ATMOSPHERE >ATMOSPHERIC WATER VAPOR >EVAPORATION    [Definition]
ATMOSPHERE >ATMOSPHERIC WATER VAPOR >HUMIDITY    [Definition]
ATMOSPHERE >ATMOSPHERIC WATER VAPOR >PRECIPITABLE WATER    [Definition]
ATMOSPHERE >ATMOSPHERIC WATER VAPOR >WATER VAPOR    [Definition]
ATMOSPHERE >ATMOSPHERIC WINDS >SURFACE WINDS    [Definition]
ATMOSPHERE >ATMOSPHERIC WINDS >TURBULENCE    [Definition]
ATMOSPHERE >ATMOSPHERIC WINDS >WIND STRESS    [Definition]
ATMOSPHERE >ATMOSPHERIC RADIATION >ATMOSPHERIC HEATING    [Definition]
ATMOSPHERE >ATMOSPHERIC RADIATION >HEAT FLUX    [Definition]
ATMOSPHERE >ATMOSPHERIC RADIATION >RADIATIVE FLUX    [Definition]
OCEANS >OCEAN HEAT BUDGET >CONDUCTION    [Definition]
OCEANS >OCEAN HEAT BUDGET >EVAPORATION    [Definition]
OCEANS >OCEAN HEAT BUDGET >HEAT FLUX    [Definition]
OCEANS >OCEAN PRESSURE >SEA LEVEL PRESSURE    [Definition]
OCEANS >OCEAN TEMPERATURE >SEA SURFACE TEMPERATURE    [Definition]
OCEANS >OCEAN WINDS >SURFACE WINDS    [Definition]
OCEANS >OCEAN WINDS >TURBULENCE    [Definition]
OCEANS >OCEAN WINDS >WIND STRESS    [Definition]


ISO Topic Category
CLIMATOLOGY/METEOROLOGY/ATMOSPHERE
OCEANS


Platform
DMSP >Defense Meteorological Satellite Program    [Information]


Instrument
SSMI >Special Sensor Microwave/Imager    [Information]


Project
EOSDIS >Earth Observing System Data Information System    [Information]
ESIP >Earth Science Information Partners Program    [Information]
MEASURES >Making Earth Science Data Records for Use in Research Environments    [Information]


Keywords
fluxes
oceanic surface fluxes
latent heat flux
climate
hydrological cycle
hyrodlogy
EOSDIS


Data Set Progress
PLANNED


Originating Center
GES DISC


Data Center
Goddard Earth Sciences Data and Information Services Center (formerly Goddard DAAC), Global Change Data Center, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA    [Information]
Data Center URL: http://disc.gsfc.nasa.gov/

Data Center Personnel
Name: GES DISC HELP DESK SUPPORT GROUP
Phone: 301-614-5224
Fax: 301-614-5268
Email: gsfc-help-disc at lists.nasa.gov
Contact Address:
Goddard Earth Sciences Data and Information Services Center
Code 610.2
NASA Goddard Space Flight Center
City: Greenbelt
Province or State: MD
Postal Code: 20771
Country: USA



Distribution
Distribution_Media: FTP/HTTP
Distribution_Size: 4 MB
Distribution_Format: HDF-EOS5
Fees: None


Personnel
ANDREY SAVTCHENKO
Role: DIF AUTHOR
Phone: 301-614-5705
Fax: 301-614-5268
Email: Andrey.Savtchenko at nasa.gov
Contact Address:
Distributed Active Archive Center Global Change Data Center
Code 610.2
NASA Goddard Space Flight Center
City: Greenbelt
Province or State: MD
Postal Code: 20771
Country: USA



Creation and Review Dates
DIF Creation Date: 2010-07-28
Last DIF Revision Date: 2013-01-14

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