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 ...
On Thursday, 12 June 2014 from 3:00 p.m. to 4:00 p.m. (USA Mountain Time), our Web services will be unavailable due to NSIDC server maintenance. We apologize for any inconvenience this may cause you
pressure (force per unit area) exerted by the atmosphere on any surface by virtue of its weight; it is equivalent to the weight of a vertical column of air extending above a surface of unit area to the outer limit of the atmosphere.