Version 2 Goddard Satellite-Based Surface Turbulent Fluxes (GSSTF) Data
Entry ID: GES_DISC_GISSTF_V002

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Summary
Abstract: [Source: NASA GES-DISC, ftp://disc2.nascom.nasa.gov/data/TRMM/Ancillary/gsstf/gsstf2.0/gsstf2_doc ]

The data set is referred to as the "GSSTF 2.0 Global Ocean Gridded Data
Set." GSSTF stands for Goddard Satellite-Based Surface Turbulent Fluxes.

The data set currently contains a suite of 3 products. The first two
products provide (i) daily and (ii) monthly-mean, global ocean 1-degree
latitude by 1-degree longitude gridded values of surface fluxes and some
related quantities based mainly on SSM/I data (Special Sensor Microwave/
Imager; onboard F8, F10, F11, F13, and F14 satellites) over the 13.5-year
period of July 1987 through December 2000. Note that monthly-mean data were
produced using at least 10 available daily values.

The third product provides (iii) the 1988-2000 monthly-mean and annual-mean
climatology data for the same parameters. The monthly-mean climatology data
were produced using the interpolated (grids with missing value being
interpolated from their neighboring 8 grids by a distance weight) individual
monthly-mean data. An aggressive interpolation scheme was used, with
newly-interpolated grid boxes serving as input for filling in additional
grid boxes, in order to maximize the number of grid boxes with data. The
climatology files thus have more grid boxes with non-missing data values
than the individual monthly and daily files. The annual-mean climatology
was then generated based on those 12 monthly-mean climatologies.

The daily, monthly-mean, and annual- and monthly-mean climatology products
all include eight variables:

(1) "E" : latent heat flux (W/m**2),
(2) "STu": zonal wind stress (N/m**2),
(3) "STv": meridional wind stress (N/m**2),
(4) "H" : sensible heat flux (W/m**2),
(5) "Q" : surface air (~10-m) specific humidity (g/kg),
(6) "WB" : lowest 500-m precipitable water (g/cm**2),
(7) "U" : 10-m wind speed (m/s),
(8) "DQ" : sea-air humidity difference (g/kg).

WB is retrieved from the SSM/I radiances using the method of Schulz et al.
(1993), while U is an SSM/I product derived by Wentz (1997). Q is derived
from WB and water vapor amount in the entire atmospheric column of Wentz
(1997) using the method developed by Chou et al. (1995, 1997). DQ is
derived from Q and sea surface temperature (SST) of the NCEP reanalysis
(Kalnay et al. 1996), including a 2% reduction in saturation specific
humidity at SST due to salinity effect. The turbulent fluxes (wind stress,
E, and H) are then computed from U, DQ, and sea-air temperature difference
of NCEP reanalysis based on surface layer similarity (Chou 1993; with the
flux-profile relationships of Dyer (1974) but changing the von Karman
constant from 0.41 to 0.4). Wind stress direction is taken from 10-m wind
direction derived from SSM/I 10-m wind speed (Wentz 1997), 10-m wind field
of NCEP reanalysis, and wind measurements from ships and buoys (see Atlas
et al. 1996) produced at NASA GMAO by Atlas' group.

The main refereed citation for the data set is Chou et al. (2003)
(all references are listed in section 10).

Related URL
Link: GET DATA


Link: VIEW EXTENDED METADATA


Link: VIEW PROJECT HOME PAGE
Description: Documentation related to the GSSTF2 reprocessing.


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

Data Set Citation
Dataset Originator/Creator: S.-H. Chou, E.J. Nelkin, J. Ardizzone, R.M. Atlas, and C.-L. Shie
Dataset Title: Version 2 Goddard Satellite-Based Surface Turbulent Fluxes (GSSTF) Data
Dataset Release Place: Greenbelt, MD, USA
Dataset Publisher: NASA Goddard Earth Sciences Data and Information Services Center (GES-DISC)
Version: 2.0
Online Resource: http://disc.sci.gsfc.nasa.gov/precipitation/data-holdings/access/gs...


Temporal Coverage
Start Date: 1987-07-01
Stop Date: 2000-12-31

Start Date: 1988-01-01
Stop Date: 2000-12-31


Location Keywords
GEOGRAPHIC REGION > GLOBAL OCEAN


Data Resolution
Latitude Resolution: 1 Degree
Longitude Resolution: 1 Degree
Temporal Resolution: Monthly


Science Keywords
ATMOSPHERE >ATMOSPHERIC WATER VAPOR >HUMIDITY >SPECIFIC HUMIDITY    [Definition]
ATMOSPHERE >ATMOSPHERIC WATER VAPOR >HUMIDITY >SEA-AIR HUMIDITY DIFFERENCE    [Definition]
ATMOSPHERE >ATMOSPHERIC WATER VAPOR >PRECIPITABLE WATER >LOWEST 500-M PRECIPITABLE WATER    [Definition]
ATMOSPHERE >ATMOSPHERIC WINDS >WIND STRESS >ZONAL WIND STRESS    [Definition]
OCEANS >OCEAN HEAT BUDGET >HEAT FLUX >LATENT HEAT FLUX    [Definition]
OCEANS >OCEAN HEAT BUDGET >HEAT FLUX >SENSIBLE HEAT FLUX    [Definition]
OCEANS >OCEAN WINDS >SURFACE WINDS >10 M WINDS    [Definition]
OCEANS >OCEAN WINDS >WIND STRESS    [Definition]
OCEANS >OCEAN WINDS >WIND STRESS >MERIDIONAL WIND STRESS    [Definition]


ISO Topic Category
CLIMATOLOGY/METEOROLOGY/ATMOSPHERE
OCEANS


Platform
DMSP 5D-2/F10 >Defense Meteorological Satellite Program-F10    [Information]
DMSP 5D-2/F11 >Defense Meteorological Satellite Program-F11    [Information]
DMSP 5D-2/F13 >Defense Meteorological Satellite Program-F13    [Information]
DMSP 5D-2/F14 >Defense Meteorological Satellite Program-F14    [Information]
DMSP 5D-2/F8 >Defense Meteorological Satellite Program-F8    [Information]


Instrument
SSMI >Special Sensor Microwave/Imager    [Information]


Project
EOS >Earth Observing System    [Information]
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]


Use Constraints
Please Cite the data set creators if you use this data.


Data Set Progress
COMPLETE


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


Personnel
ERIC J. NELKIN
Role: TECHNICAL CONTACT
Role: INVESTIGATOR
Email: Eric.J.Nelkin at nasa.gov
Contact Address:
NASA Goddard Space Flight Center
Code 613.1
City: Greenbelt
Province or State: MD
Postal Code: 20771
Country: USA


CHUNG-LIN SHIE
Role: TECHNICAL CONTACT
Role: INVESTIGATOR
Email: chung-lin.shie-1 at nasa.gov


SCOTT A. RITZ
Role: DIF AUTHOR
Phone: 301-614-5126
Fax: 301-614-5268
Email: Scott.A.Ritz at nasa.gov
Contact Address:
NASA Goddard Space Flight Center
Global Change Master Directory
City: Greenbelt
Province or State: Maryland
Postal Code: 20771
Country: USA


Publications/References
Atlas, R., R.N. Hoffman, S.C. Bloom, J.C. Jusem, and J. Ardizzone, 1996: A multiyear global surface wind velocity dataset using SSM/I wind obser-vations. Bull. Amer. Meteor. Soc., 77, 869-882.

Chou, S.-H., 1993: A comparison of airborne eddy correlation and bulk aerodynamic methods for ocean-air turbulent fluxes during cold-air outbreaks. Bound.-Layer Meteor., 64, 75-100.

Chou, S.-H., R.M. Atlas, C.-L. Shie, and J. Ardizzone, 1995: Estimates of surface humidity and latent heat fluxes over oceans from SSM/I data. Mon. Wea. Rev., 123, 2405-2425.

Chou, S.-H., C.-L. Shie, R.M. Atlas, and J. Ardizzone, 1997: Air-sea fluxes retrieved from special sensor microwave imager data. J. Geophys. Res., 102, 12705-12726.

Chou, S.-H., E. Nelkin, J. Ardizzone, R. Atlas, and C.-L. Shie, 2003: Surface turbulent heat and momentum fluxes over global oceans based on the Goddard satellite retrievals, version 2 (GSSTF2). J. Climate, 16, 3256-3273.

Dyer, A.J., 1974: A review of flux-profile relationships. Bound.-Layer Meteor., 7, 363-372.

Kalnay, E. and coauthors, 1996: The NCEP/NCAR 40-year reanalysis project. Bull. Amer. Meteor. Soc., 77, 437-471.

Schulz, J., P. Schluessel, and H. Grassl, 1993: Water vapor in the atmospheric boundary layer over oceans from SSM/I measurements. Int. J. Remote Sens., 14, 2773-2789.

Wentz, F.J., 1997: A well calibrated ocean algorithm for SSM/I. J. Geophys. Res., 102, 8703-8718.

GSSTF 2.0 Global Ocean Gridded Data Set
http://disc.sci.gsfc.nasa.gov/precipitation/data-holdings/access/gs...

GES DISC home page
http://disc.gsfc.nasa.gov

Creation and Review Dates
DIF Creation Date: 2008-11-03
Last DIF Revision Date: 2011-07-26

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