National Climatic Data Center (NCDC)
The world's largest active archive of weather data. NCDC produces numerous climate publications and responds to data requests from all over the world.

Southeast Regional Climate Center
SERCC is one of six regional climate centers in the United States directed by the National Climatic Data Center and the National Environmental Satellite, Data, and Information Service (NESDIS) of the National Oceanographic and Atmospheric Administration (NOAA).

Regional Climate Centers
Established by NCDC to meet local and regional needs for climate data, research-based information, and expertise.

State Climatology Offices
State Climatologists are individuals who have been identified by a state entity as the state's climatologist and who are also recognized by the Director of the National Climatic Data Center of the National Oceanic and Atmospheric Administration as the state climatologist of a particular state.

Climate Prediction Center (CPC)
Assess and forecast the impacts of short-term climate variability, emphasizing enhanced risks of weather-related extreme events, for use in mitigating losses and maximizing economic gains.

National Oceanic And Atmospheric Administration (NOAA)
Environmental Information Services
NOAA's Mission is to describe and predict changes in the Earth's environment, and conserve and wisely manage the Nation's coastal and marine resources.

National Snow and Ice Data Center (NSIDC)
The NSIDC archives and distributes digital and analog snow and ice data. It also maintains information about snow cover, avalanches, glaciers, ice sheets, freshwater ice, sea ice, ground ice, permafrost, atmospheric ice, paleoglaciology, and ice cores.

IRI/LDEO Climate Data Library
Lamont-Doherty Earth Observatory of Columbia University data library contains a wide variety of oceanographic and atmospheric data.

NASA's Langley Distributed Data Archive
Processes, archives, and distributes Earth Science data.

National Oceanic and Atmospheric Administration NOWCAST site
A web mapping portal to real-time coastal observations and NOAA forecasts.

Pacific Marine Environmental Laboratory (PMEL)
Conducts scientific investigations in physical oceanography, marine meteorology, geochemistry, and related subjects.

NOAA/PMEL Live Data Access Page
Provides live access to all PMEL climate data.

Joint Institute for the Study of Atmosphere and Oceans (JISAO)
An archive for various atmospheric and oceanographic gridded and time series data sets.

National Geophysical Data Center (NGDC)
The National Geophysical Data Center (NGDC) is the national repository for geophysical data, providing a wide range of science data services and information.

National Oceanographic Data Center (NODC)
Serves to "acquire, process, preserve, and disseminate oceanographic data."  Its primary mission is to ensure that global oceanographic data collected at great cost is maintained in a permanent archive that is easily accessible to the world science community and to other users.

Center for International Earth Science Information Network (CIESIN)
Established in 1989 as a non-profit, non-governmental organization to provide information to help scientists, decision-makers, and the public better understand their changing world. CIESIN specializes in global and regional network development, science data management, decision support, and training, education and technical consultation services.

NASA Planetary Data Systems
Archives and distributes digital data from past and present NASA planetary missions, astronomical observations, and laboratory measurements. The PDS is sponsored by NASA's Office of Space Science to ensure the long-term usability of data, to stimulate research, to facilitate data access, and to support correlative analysis.

NOAA Climate Diagnostics Center
The Satellite Climate Research Group uses data from various environmental satellites in studies of seasonal to interannual climate variability.

The European Space Agency (ESA/ESRIN)
ESA's Ionia (Greek school of philosophy) server with information about the four basic elements: fire, water, air, and earth.

Center for Earth and Planetary Studies and its Regional Planetary Image Facility
Scientific research unit within the Collections and Research Department of the National Air and Space Museum, Smithsonian Institution. CEPS performs original research and outreach activities on topics covering planetary science, terrestrial geophysics, and the remote sensing of environmental change.

Hydrographic Atlas of the Southern Ocean
Alfred Wegener Institute's information about the hydrographic structure of the Southern Ocean.

TOGA- The Tropical Atmosphere Ocean (TAO) Project
The TAO Array, consisting of nearly 70 moored buoys spanning the equatorial Pacific, measures oceanographic and surface meteorological variables critical for improved detection, understanding and prediction of seasonal-to-interannual climate variations originating in the tropics, most notably those related to the El Nio/Southern Oscillation (ENSO).

Goddard Institute for Space Studies (GISS)
Datasets, images, and software.