When scientists talk about the cryosphere, they mean the places on Earth where water is in its solid form, frozen into ice or snow. Read more ...
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NASA National Snow and Ice Data Center Distributed Active Archive Center
NCEP/NCAR Arctic Marine Rawinsonde Archive, available via ftp,
contains 17,659 marine rawinsonde reports for the region north of 65
degrees North. Its record extends from 1976 to 1996. These soundings
have been extracted from the National Center for Atmospheric Research
(NCAR) rawinsonde archive of the National Meteorological Center (NMC)
(now the National Center for Environmental Prediction, or NCEP). The
NCEP/NCAR Arctic Marine Rawinsonde Archive data set complements the
Historical Arctic Rawinsonde Archive (HARA) for land stations and the
Russian 'North Pole' drifting station archive.