Sentences with phrase «multiyear ice area»

A smaller multiyear ice area in the Arctic Ocean means that the sea ice summer extent is more sensitive to weather conditions during summer and thus more difficult to predict using statistical regression analysis since seasonal weather forecasts are not reliable.

So we expect some replenishment of the multiyear ice area this summer.

Not exact matches

There also appears to be a strong correlation between the area of multiyear ice and the spatially averaged thickness of the perennial ice pack, which suggests that the satellite - derived areal decreases represent substantial rather than only peripheral changes.

These data were used to quantify changes in the ice cover's composition, revealing a substantial reduction of about 14 percent in the area of multiyear ice in winter during the period from 1978 to 1998.

Ice - covered sea areas in the Arctic Ocean during summer have nearly halved since the 1970s and 1980s, raising alarm that the ocean is shifting from a multiyear to a seasonal ice zoIce - covered sea areas in the Arctic Ocean during summer have nearly halved since the 1970s and 1980s, raising alarm that the ocean is shifting from a multiyear to a seasonal ice zoice zone.

«I wonder whether over all the trend towards thinner younger ice may have resulted in a net underestimation rather than overestimation of the area of multiyear ice.

Please keep in mind that these maps basically indicate areas where at least some multiyear (MY) ice is expected to be present rather than areas where MY ice is prevalent.»

The main preconditioning considered in our outlook is the area of robust multiyear ice in spring (April - May), the thickness of the FY ice as determined by the number of freezing degree days during winter / spring and the spring / summer total ice extent at the time of issue of the outlook.

Rigor estimates, based on buoy drift and modeling, that for March sea ice area, 65 % was multiyear before 1990, but multiyear made up only 40 % in March 2007 and 27 % in March 2008.

Rapid ice drift is an important factor in regional ice conditions, especially redistribution of multiyear ice into areas with high melt rates at low latitudes.

To obtain an estimate, a sea ice area from the Arctic Basin (excluding the pole and the multiyear sea ice north of Greenland) is regressed with the previous years and their September mean extents.