The Arctic Region covers 30 million square kilometers,
counts 4 million inhabitants and last not least 25,000 polar bears.
During Arctic summer the sun shines around the clock at the North Pole.
Actually, the length of an Arctic day (sunrise to sunset) of a given place
is a function of latitude and time of year.
Current sunlight conditions of the northern hemisphere are displayed in real time on the left
(click to zoom / credit: fourmilab.ch).
Most observations and scientific data stem from remote sensing,
weather stations, submarines and buoys. A tiny fleet of polar orbiting satellites
captures electro-magnetic echos of different wave-lengths every day.
Most accurate data is expected from the European CryoSat 2 mission.
With a SAR Interferometric Radar Altimeter on board the satellite measures and calculates
ice thickness down to a centimeter scale.
In June 2011 ESA published first results
(click to zoom / credit: UCL,
CPOM, ESA).
The US National Snow and Ice Data Center (NSIDC)
maintains the longest available sea ice extent dataset.
Since the late '60 sea ice is on decline and shows a greater variability after the beginning of this century.
(click to zoom / credit: NSIDC)
During the first week of each month the NSIDC provides
News & Analysis
on sea ice conditions in the northern hemisphere.
Check out more sensor data and deriving products below. Most charts are updated at least once per day.
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