NASA | Earth Science Week | How is the Global Earth ...
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Transcribe video | Upload subtitles OR Translate this English subtitles to Transcript below[Music] [Music] One of the key variables that we at NASA have been studying with satellite data is sea ice in the polar regions.Sea ice is a really important component of the polar regions. It does things like insulates between the ocean and the atmosphere, reflects solar radiation, extends over a very large area in both polar regions, and so it has an impact. It has an impact that propgates somtetimes to lower latitudes also. So, we want to study this, and the only way, really, to study it effectively on the large scale is with satellite data, which give us a beautiful view of both north polar and south polar region[s], so we've been doing that, and we've been doing it for 30 years, and we've been finding that in the Arctic case that Arctic sea ice has actually decreased quite a bit over that time span of about 30 years, whereas the Antarctic has not. The Antarctic has been increasing. This is a puzzle that many of us are interested in solving, and it also -- the Arctic case fits in really well with global warming and has many people interested because of how it fits in, and the impacts that it has on other life forms in the arctic regions.
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