United States Government

Goddard Earth Sciences (GES) Data and Information Services Center (DISC) Distributed Active Archive Center (DAAC) - Provides data, data related services, and data support for global environmental change research and education. Funded through NASA's Earth Observing System (EOS) as a source of information about the upper atmosphere, atmospheric dynamics, and the global biosphere.
http://daac.gsfc.nasa.gov/

Carbon Dioxide Information Analysis Center (CDIAC) - Global-change data and information analysis for the U.S. Department of Energy (DOE). Compiles and maintains international data sets on atmospheric chemistry, particularly atmospheric concentrations of carbon dioxide, methane and other radiatively active gases.
http://cdiac.esd.ornl.gov/

USDOC/NOAA/NESDIS/National Geophysical Data Center - Manages environmental data in the fields of marine geology and geophysics, paleoclimatology, solar-terrestrial physics, solid earth geophysics, and glaciology (snow and ice).
http://www.ngdc.noaa.gov/

Biogeochemical Dynamics Distributed Active Archive Center (DAAC) - The Oak Ridge National Laboratory (ORNL)/NASA DAAC provides biogeochemical and ecological data for use in studying environmental processes. Data were collected on the ground, from aircraft, and by satellite, or generated by computer models.
http://www-eosdis.ornl.gov/

NSSDC OMNIWeb - Data retrieval and analysis interface to the National Space Science Data Center's OMNI data: This data includes "near-Earth" solar wind magnetic field and plasma data, energetic proton fluxes, and geomagnetic and solar activity indices.
http://nssdc.gsfc.nasa.gov/omniweb/ow.html

National Snow and Ice Data Center (NSIDC) - As an information and referral center in support of polar and cryospheric research, NSIDC archives and distributes digital and analog snow, ice, and glaciological data.
http://nsidc.org/

Alaska Satellite Facility - The Alaska Satellite Facility is a NASA Distributed Active Archive Center (DAAC) and receiving ground station for Synthetic Aperture Radar (SAR), Sea Ice, Polar Processes, and Geophysics.
http://www.asf.alaska.edu/

USGS Earth Observing 1 (EO-1) User's Guide - Access data from the EO-1 satellite at the United States Geological Survey (USGS).
http://eo1.usgs.gov/userGuide/index.php?page=data_access

NASA-JPL Physical Oceanography Distributed Active Archive Center (PO-DAAC) - Distribution of data for sea surface temperature, sea surface topography, and ocean vector winds acquired by NASA instruments.
http://podaac.jpl.nasa.gov/

NSF Geosciences Unidata Integrated Earth Information Server (IEIS) - Information that arrives via the experimental nation-wide Unidata Internet Data Distribution (IDD) network, which automatically delivers real-time environmental observations from observing systems around the globe.
http://atm.geo.nsf.gov/

EROS Data Center at the U.S. Geological Survey - The EROS Data Center is home to the U.S. National Satellite Land Remote Sensing Data Archive. The EROS Data Center is managed by the United States Geological Survey (USGS).
http://edc.usgs.gov/

High-resolution Shoreline Database - Information on digital coastline and shorelines data available from various sources. Provided by the NOAA National Geophysical Data Center (NGDC) Marine Geology and Geophysics Division and collocated World Data Center A for Marine Geology and Geophysics.
http://www.ngdc.noaa.gov/mgg/shorelines/gshhs.html

NASA-Langley Atmospheric Sciences Data Center (ASDC) - The ASDC processes, archives and distributes data from instruments measuring clouds, aerosols, tropospheric chemistry, and Earth's radiation budget.
http://eosweb.larc.nasa.gov/

NASA Distributed Active Archive Centers (DAACs) - Processes, archives, documents, and distributes Earth science and socioeconomic data.
http://nasadaacs.eos.nasa.gov/