There’s a website I frequent from the National Snow and Ice Data Center
which has some great current and historical information about the
Arctic, Antarctic and Greenland ice coverage. This organization’s
research and scientific data management activities are supported by
NASA, the National Science Foundation (NSF), the National Oceanic and
Atmospheric Administration (NOAA). They receive other funding via
contracts, grants and other agencies.
The center itself is part of the Cooperative Institute for Research
in Environmental Sciences (CIRES) at the University of Colorado at
Boulder, I find the information very well presented and easy to
understand. The statistics and images I used for this blog entry come
from that website.
We hear a lot of chatter about global sea ice, mostly in the arctic
region because that’s where the ice has declined over the past several
decades. During the past 12 months it’s been interesting to see how the
decline in the ice has slowed and there has been an increase in
multi-year ice as well. One year doesn’t buck a trend and it may be
but a blip in the overall decline. Nevertheless it’s important to note.
Back on the first day of spring, the ice in the arctic reached its
maximum for the year. At 14.91 million square kilometers (5.76 million
square miles), this was the fifth lowest maximum in the satellite record
which dates back to 1979. While certainly significant, 35 years of
data is a very small subset of geological time.
At the other end of the planet during our winter, the Antarctic ice
sheet is undergoing its yearly loss of ice. This year, the sea ice
reached its annual minimum on February 23, and was the fourth highest
Antarctic minimum in the satellite record. You can see on the image
below the trend is quite the opposite of what's going on at the top of
the planet.
http://www.boston.com/news/weather/weather_wisdom/2014/05/how_is_the_arctic_and_antarcti.html
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