<URL:http://gcmd.gsfc.nasa.gov>
<URL:telnet://gcmd.gsfc.nasa.gov> (login "gcdir")
    The Global Change Master Directory is a multidisciplinary on-line 
information system containing descriptions of Earth and space science 
data holdings available to the science community. These include data from 
NASA, NOAA, NCAR, USGS, DOE (CDIAC), EPA, NSF and other  U.S. and 
international agencies, universities, and research centers.
  For telnet access, login as "gcdir".

<URL:http://www.ucar.edu/dss/index.html>
<URL:ftp://ncardata.ucar.edu>
  National Center for Atmospheric Research (NCAR) Data Support Section
maintains a large archive of a variety of atmospheric, oceanic, and 
geophysical datasets, encompassing most subdisciplines. This site contains information (metadata) on available datasets; a few small datasets are directly available.  

<URL:http://www.esdim.noaa.gov>
  National Oceanic and Atmospheric Administration (NOAA) Environmental 
Information Services Home Page.  This "master page" links to the Web
pages of the various NOAA Data Centers:
  National Climatic Data Center (NCDC) <URL:http://www.ncdc.noaa.gov/>
  National Oceanographic Data Center (NODC) <URL:http://www.nodc.noaa.gov/>
  National Geophysical Data Center (NGDC) <URL:http://www.ngdc.noaa.gov/>
  You can search the NOAA dataset catalog, which covers all the NOAA Data 
Centers.  The individual data centers are also listed elsewhere in this
document.

<URL:http://eos.nasa.gov>
  Home page for Earth Observing System (EOS).  This "master page" links
to the home pages of the various Distributed Active Archive Centers (DAACs), 
which provide data from EOS:
  JPL Physical Oceanography DAAC <URL:http://podaac-www.jpl.nasa.gov>
  Marshall Space Flight Center DAAC <URL:http://wwwdaac.msfc.nasa.gov>
  Goddard DAAC <URL:http://daac.gsfc.nasa.gov/DAAC_DOCS/gdaac_home.html>
  Earth Resources Observation Systems DAAC 
<URL:http://sun1.cr.usgs.gov/landdaac/landdaac.html>
  National Snow and Ice Data Center DAAC
<URL:http://www-nsidc.colorado.edu/NASA/GUIDE/>
  Langley DAAC <URL:http://eosweb.larc.nasa.gov>
  Oak Ridge National Laboratory DAAC <URL:http://www-eosdis.ornl.gov>
  NOAA's Satellite Active Archive <URL:http://www.saa.noaa.gov>
  Consortium for International Earth Science Information Network (CIESIN)
<URL:http://www.ciesin.org>
  Alaska Synthetic Aperture Radar (SAR) Facility 
<URL:http://eosims.asf.alaska.edu:12355/datacenters_documents/ASF_datacenter_doc.html>
  The individual data centers are also listed elsewhere in this
document.

<URL:http://nssdc.gsfc.nasa.gov/earth/earth_home.html>
  National Space Science Data Center (NSSDC) earth science archive page.  A new policy from the Earth Sciences and Applications Division at NASA Headquarters directed NSSDC to distribute its holdings to various designated archives.  NSSDC no longer archives any new Earth science data; this site describes the Earth science data transfer activities and provides selective data and resources available to users. 

<URL:http://www-mel.nrlmry.navy.mil/>
  Defense Modeling Simulations Office (DMSO) Master Environmental 
Library (MEL).  This site offers keyword searching of a directory of
all meteorological, oceanographic, and other environmental data at
Department of Defense sites such as the Fleet Numerical Oceanography
Center, Naval Research Laboratories, Air Force Global Weather Center,
etc.  

<URL:http://www.grid.unep.ch/gridhome.html>
  United Nations Environment Programme (UNEP) Global Resource Information Database (GRID).  Global and European datasets for environmental researchers, including vegetation and topography maps, maps of population and other human-related items, and various climatologies.

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