20 Research data p2 (Meteorology: Sources of CD-ROMs)
Description
This article is from the Meteorology FAQ, by Tom Berg hcane@mobile.gulf.net with numerous contributions by others.
20 Research data p2 (Meteorology: Sources of CD-ROMs)
GEDEX (Greenhouse Effect Detection Experiment)(price not known):
Two discs containing surface, upper air, and/or satellite-derived
measurements of temperature, solar irradiance, clouds, greenhouse
gases, fluxes, albedo, aerosols, ozone, and water vapor, along with
Southern Oscillation Indices and Quasi-Biennial Oscillation statistics.
Many of the data sets provide global coverage. The spatial resolutions
vary from zonal to 2.5 degree grids. Some surface station data sets
span more than 100 years; most satellite-derived sets cover only the
past 12 years. Temporal coverage is monthly for most sets.
Contact: NCDS/Goddard Distributed Active Archive Center, Code 935,
Goddard Space Flight Center, Greenbelt, MD 20771. 301/286-3209, email
daacuso@daac.gsfc.nasa.gov
A more complete description of these discs may be obtained from
the ncardata.ucar.edu FTP site, in the file "other_resources/gedex".
HCDN (Hydro-climatic data network) streamflow dataset (price not known):
Contains dataset, search software, and USGS Open-File Report 92-129
(Slack, J.R., and Landwehr, J.M., 1992, Hydro-climatic data network
(HCDN): A U.S. Geological Survey streamflow data set for the United
States for the study of climate variations, 1874-1988).
Contact: USGS, National Water Data Exchange (NAWDEX), MS 421 -
National Center, Reston VA 22092.
The principal author of this dataset, James R. Slack, can be reached
via email at jrslack@qvarsa.er.usgs.gov.
The information on the CD-ROM is also available via anonymous FTP from
srv1rvares.er.usgs.gov in the directory "hcdn92".
The following 6 discs/disc sets are available from NSIDC User
Services, National Snow and Ice Data Center, CIRES - Campus Box 449,
University of Colorado, Boulder, CO 80309-0449. 303/492-6199, FAX
303/492-2468, email: nsidc@kryos.colorado.edu, Omnet: NSIDC.
DMSP F8 Special Sensor Microwave/Imager (SSM/I) Brightness Temperature
Grids for the Polar Regions (Price on request):
18 CD-ROM discs contain daily gridded brightness temperature (Tb) for
the north and south polar regions (areas where sea ice occurs), on
polar stereographic grids, 9 July 1987 through 31 December 1991. Each
CD-ROM contains approximately 3 months of data. Defense
Meteorological Satellite Program (DMSP) F8 platform carried this first
functional SSM/I instrument. The SSM/I is a 7-channel, 4-frequency,
linearly polarized, passive microwave radiometric system; channels are
85.5 GHz Vertical/Horizontal, 37.0 GHz Vertical/Horizontal, 22.2 GHz
Vertical, 19.3 GHz Vertical/Horizontal.
Fortran program provided on diskette to extract single channel from
inter-leaved storage format. Images can be displayed using IDL or other Unix or PC software. For 1992 and later data, see DMSP F11 SSM/I Brightness Temperature Grids for the Polar Regions, below.
Contact NSIDC, information above.
DMSP F8 Special Sensor Microwave/Imager (SSM/I) Sea Ice Concentration
Grids for the Polar Regions 1987 - 1991. (Price on request):
DMSP F8 SSM/I Ice Concentration Grids for the Polar Regions consist of
daily first-year, multi-year, and total ice concentration on 25 x 25
km polar stereographic grids for north and south polar regions. SSM/I
sea ice CD-ROMs contain two sets of grids, 1) NASA Team algorithm; 2)
J.C. Comiso algorithm. Orbital antenna temperatures are processed to
gridded brightness temperatures and then used to derive gridded ice
concentrations. The SSM/I sensor flies on U.S. Air Force Defense
Meteorological Satellite Program (DMSP) platforms; the first
operational SSM/I (Special Sensor Microwave/Imager) was that on DMSP
F8. Two CD-ROMs contain all F8 SSM/I ice concentrations, 9 July 1987
- 31 December 1991. North polar files are 137202 bytes, south polar
are 105922 bytes.
Data are in HDF format and can be read using software from the
National Center for Supercomputing Applications (NSCA), available by
anonymous ftp from NCSA (ftp.ncsa.uiuc.edu) or with commercial
packages such as IDL.
The SSM/I is a 7-channel, 4-frequency, linearly polarized, passive
microwave radiometric system: 85.5 GHz Vertical/Horizontal, 37.0 GHz
Vertical/Horizontal, 22.2 GHz Vertical, 19.3 GHz Vertical/Horizontal.
DMSP F11 SSM/I ice concentrations for 1992 and later dates will be
produced starting in late 1994, after the ice algorithms have been
modified for F11 data.
Contact NSIDC, information above.
DMSP F11 Special Sensor Microwave/Imager (SSM/I) Brightness
Temperature Grids for the Polar Regions. (Price on request):
CD-ROM discs contain daily gridded brightness temperature (Tb) for the
north and south polar regions (areas where sea ice occurs), on polar
stereographic grids, beginning on 3 December 1991. Each CD-ROM
contains approximately 3 months of data in single-channel files, in
HDF (Hierarchical Data Format). As of 8/94, 5 volumes cover 12/91 -
2/93. Inquire for latest available data.
Software to read and manipulate the data in HDF is available via ftp
from National Center for Supercomputing Applications (NCSA): ftp to
ftp.ncsa.uiuc.edu; help is available from NCSA at
helphdf@ncsa.uiuc.edu. Data can also be displayed and manipulated
using commercial packages such as IDL.
The Defense Meteorological Satellite Program (DMSP) F11 platform
carries this SSM/I instrument, a 7-channel, 4-frequency, linearly
polarized, passive microwave radiometric system; channels are 85.5 GHz
Vertical/Horizontal, 37.0 GHz Vertical/Horizontal, 22.2 GHz Vertical,
19.3 GHz Vertical/Horizontal. This product uses the same grid and
projection as the NSIDC DMSP F8 SSM/I brightness temperature and sea
ice concentration CD-ROMs (1987 - 1991, see above).
Contact NSIDC, information above.
Nimbus-7 Scanning Multichannel Microwave Radiometer (SMMR) Polar
Radiances and Arctic and Antarctic Sea Ice Concentrations, 1978 -
1987. (Price on request):
Scanning Multichannel Microwave Radiometer (SMMR) Polar Radiances and
Sea Ice Concentrations on CD-ROM contain gridded brightness
temperatures (Tb) and sea ice concentrations for 10/78 - 8/87 (the
life of the Nimbus-7 SMMR scanner) for both polar regions on 12
CD-ROMs. Data were collected at 6.60, 10.69, 18.00, 21.00 and 37.00
GHz in an alternate-day operating pattern due to spacecraft power
limitations. [NOTE: Input data set is SMMR TCT tapes; this is
different from the previous SMMR CD-ROM product distributed by NSIDC
in 1989.] Tb (in Kelvins) and sea ice concentration (in percent)
grids have 25 x 25 km grid elements in polar stereographic projection.
Volume 7 contains all SMMR sea ice concentrations for both polar
regions, plus 5 months of Tb grids for the north polar region. The Tb
grids are stored as 16-bit integers; one day of Tb data is 0.27 mbytes
for the north polar region, 0.21 mbytes for the south. Ice grids are
stored as 8-bit integers, each file = 136192 bytes for the north,
104912 bytes for the south. The NASA Team Algorithm (Cavalieri et
al., 1984; Gloersen and Cavalieri, 1986) was used to calculate ice
concentrations from the Tbs. Data produced by Dr. P. Gloersen,
NASA/GSFC, Oceans and Ice Branch.
Documentation is provided on the CD-ROMs, in a hard-copy User's Guide,
and in the "SMMR Atlas", NASA Special Report SP-511 (Gloersen, et al.,
1992.)
Contact NSIDC, information above.
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