-Hydrology and glaciology

                                                                                
                                              
  Marshall Space Flight Center Distributed Active Archive Center (MSFC.DAAC).   
Data holdings are primarily aimed at researchers investigating facets of the    
hydrologic cycle.  Available data includes SSM/I NOAA/NASA Pathfinder           
Products, TOVS NOAA/NASA Pathfinder Path C1 Products, SSM/I Antenna             
Temperatures and Sensor Counts, and Climatological Summaries.                   
                                                                                
                              
  The National Snow and Ice Data Center Distributed Active Archive Center       
(NSIDC DAAC) maintains information about snow cover and avalanches, glaciers    
and ice sheets, floating ice, ground ice and permafrost, atmospheric ice,       
extra-terrestrial ices, paleoglaciology and ice cores.                          
  Also see the NSIDC home page at .             
                                                                                
                                                 
                                            
                                              
  National Operational Hydrologic Remote Sensing Center.  Snow cover            
measurements in US and Canada, and snow water equivalent data.                  
                                                                                
                                         
  The National Centers for Environmental Prediction (NCEP) Sea Ice home page.   
Contents include the most recent automated sea ice analysis for both            
hemispheres and ice drift forecast guidance.                                    
                                                                                
                                
  Ice Services Branch of Environment Canada.  Information about available       
products and services, and some sample data.                                    
                                                                                
                                
  The Institute for Meteorology of the Free Uni Berlin provides                 
operation sea-ice maps.  Text is mostly in German but there are some            
English translations.                                                           
                                                                                
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