Goddard Satellite-Based Surface Turbulent Fluxes, 0.25x0.25 deg, Daily Grid, V3, (GSSTF), at GES DISC
Entry ID:
GES_DISC_GSSTF_3
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Summary
Abstract:
These data are the Goddard Satellite-based Surface Turbulent Fluxes Version-3 (GSSTF3) 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-progr...
http://earthdata.nasa.gov/our-community/community-data-system-progr...
This suite of GSSTF version 3 products is the 0.25x0.25 deg resolution version of the GSSTF 2c collections. It does not contain, however, the "WB" variable - 'lowest 500-m precipitable water' (g/cm**2).
This is the Daily (24-hour) product; data are projected to equidistant Grid that covers the globe at 0.25 degree cell size, resulting in data arrays of 1440x720 size.
As in previous versions, the 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 3, and are stored in this HDF-EOS5 collection.
There are only one set of GSSTF, Version 3, Combined data, "Set1"
It contains 8 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),
"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_3, 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_3 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 "using the 2001 F13 data file".
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.
Parameters contained in the data files include the following:
Variable Name|Description|Units
DQ|sea-air humidity difference|(g/kg)
E|latent heat flux|(W/m^^2)
H|sensible heat flux|(W/m^^2)
Qair|surface air (~10-m) specific humidity|(g/kg)
STu|zonal wind stress|(N/m^^2)
STv|meridional wind stress|(N/m^^2)
Tot_Precip_Water|total precipitable water|(g/cm^^2)
U|10-m wind speed|(m/s)
End of parameter information 
Purpose:
The daily temporal and quarter-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 dataset 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 GSSTF3.
Related URL
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Description:
Search, visualize, subset, and download data in HDF-EOS5
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Geographic Coverage
(Click for Interactive Map)
Spatial coordinates
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N: 46.52
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S: 46.43
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E: -76.62
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W: -76.79
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Data Set Citation
Dataset Originator/Creator:
Natural Resources Canada, Canadian Forest Service, Pacific Forestry Centre
Dataset Title:
MIFUCAM - M?thode d'inventaire forestier utilisant le capteur a?roport? MEIS Dataset, Taylor Lake, Qu?bec, Canada
Dataset Release Date:
19990326
Dataset Release Place:
Petawawa, Ontario, Canada
Dataset Publisher:
Natural Resources Canada, Canadian Forest Service
Quality
For details on the accuracy of the MEIS II sensor, see references in the open
literature, including some of those cited under the Supplemental Information
field. Cloud report, summarized by acquisition date-- |
19910724 | clear during flights at 5.0m MEIS pixel size| | 19910724 |
light scattered during flights at lower ... altitudes| | 19910808 | heavy
scattered cloud| | 19910812 | clear during 16 parallel flight lines|
| 19910812 | light haze during star pattern flights (lines 3,4,5) | |
19910813 | clear during 13 parallel flight lines| | 19910813 | light
haze during higher-altitude Taylor Lake lines| More detailed
information on processing problems may be reported, if applicable, in Lineage -
Process Steps.See Attribute Accuracy Report
The raw aircraft track MEIS II imagery of the Taylor Lake block in the MIFUCAM
study area, acquired in July and August of 1991, are stored in LGSOWG format on
the project archive tapes (as listed in the Abstract section) in the DRS
equipment room at PFC.
Access Constraints
Access to the data set is restricted and licence agreements from the data
holders may be in effect. Data may be available under certain conditions. See
Distribition Information for details.
Use Constraints
The data, if provided, are offered for the sole use of the receiving party and
may not be distributed further.This data set is offered with no warranty. The
Government of Canada accepts no liability for any use or misuse of the data.
Data Set Progress
IN WORK
Personnel
Role:
DIF AUTHOR
Role:
TECHNICAL CONTACT
Phone:
+01-250-363-0600
Fax:
+01-250-363-0775
Email:
dleckie at pfc.forestry.ca
City:
Victoria
Province or State:
British Columbia
Postal Code:
V8Z 1M5
Country:
Canada
Publications/References
Leckie, D.G., J. Beaubien, J.R. Gibson, N.T. O'Neill, T. Piekutowski, and S.P. Joyce, 1995. Data processing and analysis for MIFUCAM: a trial of MEIS imagery for forest inventory mapping. Canadian Journal of Remote Sensing, 21 (3), pp. 337-356.
Leckie, D.G., M.D. Gillis, J. Beaubien, and J-F. Meunier, 1993.
MIFUCAM: a study of MEIS imagery for forest inventory mapping in Quebec.
Proceedings, 16th Canadian Symposium on Remote Sensing/8e Congres de
l'Association quebecoise de teledetection, pp. 605-613.
McColl, W.D., R.A. Neville, and S.M. Till, 1984. Multi-detector
electro-optical imaging scanner MEIS II. Proceedings, 8th Canadian Symposium on Remote Sensing, pp. 71-79.
Piekutowski, T., A.T. Hoang, and N.T. O'Neill, 1994. Calibration of CCRS reflectance panels. Report MIFUCAM-T1-CCRP. Canadian Forest Service, Quebec Region, Ste.-Foy, Quebec.
Creation and Review Dates
DIF Creation Date:
2001-09-04
Last DIF Revision Date:
2005-03-28
Future DIF Review Date:
2004-12-19
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