Ice - Glaciers |
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Sea Ice | North Pole Observations | Glaciers | Snow Cover See annual updates on Glaciers outside Greenland and Greenland from the latest Arctic Report Card Glaciers are different from sea ice in that they are regions of fresh water ice on land. Their retreat and loss of volume is an indicator of Arctic change. Note in the figure below (left) that the loss of glacier volume over the past twenty-five years has occurred primarily in North America (open circles), followed by Russia (squares). Eurasia (closed circles) actually has an increase in glacier area, as increased precipitation may have offset the influence of warming in this region. The figure below (right) shows that the contribution from melting glaciers to sea level rise has been on the order of 25 mm since 1960. This small rate of increase indicates that the contribution of glaciers in the Arctic towards global sea level rise is an issue for later in the century.
The Greenland ice cap represents a major storage of frozen fresh water on land. Below are time series of the Greenland ice sheet standardized melt index and the Greenland melt extent for June-Sept.
As of 2004, the year 2002 had the maximum yearly melt in the observational record, as shown below. A rare melt event impacting 97% of the ice sheet surface was detected by satellites in July 2012.
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