Polar Ice Pack 2018

The top right map shows the difference between total 2020 melt days and the number of 1981 to 2010 average melt days from june 21 through august 1.

Polar ice pack 2018.

Said this was not the first time a gap had appeared between the shore and the main ice pack but the one formed from 1. The arctic ice pack is the sea ice cover of the arctic ocean and its vicinity. 2019 is shown in green 2018 in orange 2017 in brown 2016 in magenta and 2012 in dashed brown. The top left map of the greenland ice sheet shows the total number of surface melt days from january 1 through august 6 2020.

This is of course the exact opposite of what fraudsters at national geographic and newsweek are claiming. Summer ice cover in the arctic is about 50 of winter cover. In march 1985 sea ice that had survived at least four summers made up 16 percent of the arctic ice pack at winter maximum. Adapted from the 2018 arctic report card these maps show the age of sea ice in the arctic ice pack in march 1985 left and march 2018 right.

The sea ice cover is one of the key components of the polar climate system. Average ice thickness is in the middle of the pack for the more recent years. Ice thickness anomalies for may 2020 relative to 2011 2018 continue the april pattern and show relatively thin ice along the russian coast and thicker than normal sea ice in the. The nasa research team found that in the 1980s sea ice on average in the arctic was 6 6 feet thick in october.

In march 2018 it made up less than 1 percent. Daily volume anomalies for may progressed at a fairly normal pace for recent years. From there on average 3 3 more feet of sea ice would form through the winter. Arctic sea ice extent for 15 august 2018 was 5 7m sq km 2 2m sq miles.

Dmi modelled ice thickness. The arctic ice pack undergoes a regular seasonal cycle in which ice melts in spring and summer reaches a minimum around mid september then increases during fall and winter. The extent of thick ice has doubled over the last ten years. The graph above shows arctic sea ice extent on september 15 2020 along with several other recent years and the record minimum set in 2012.

The widely publicized sea ice decreases in the arctic even with their worrisome acceleration in the early 21st century have never experienced in the 40 y 1979 2018 record a 4 y period with a rate of decrease in yearly average ice extents exceeding in magnitude a value of 240 000 km 2 y 1 fig.