Another month has passed and so here is the updated Arctic sea ice volume graph as calculated by the Pan-Arctic Ice Ocean Modeling and Assimilation System (PIOMAS) at the Polar Science Center: During October there was a slowdown in ice growth, which is also reflected in the PIOMAS numbers. Today, the sea-ice concentration (ice cover) is in general well estimated using satellite products, while the sea-ice thickness is poor known.
Total sea ice extent on the northern hemisphere during the past years, including climate mean; plus/minus 2 standard deviations. Whopping rebound in Arctic sea ice volume. Sadly, just for a few years we also have March or September available, and thus we normally can’t read the Arctic ice minimum (medio September) from these maps. Surprise. As the above chart shows, the ice has in reality even grown a bit! Northern Hemisphere-wide sea ice coverage since 01 Jan. 2006. The figures are based on calculations using DMI's operational ocean and sea ice model HYCOM-CICE. 2019 was the third year since 2007 to record a volume increase under 2000 km3. DMI Modelled ice thickness The extent of thick ice has doubled over the last ten years. Validation is best achieved through a comparison with in situ and satellite-derived ice thickness observations. The figures are based on calculations using DMI’s operational ocean and sea ice model HYCOM-CICE. Fig 1. Data source: Danish Meteorological Institute (DMI). Arctic sea ice volume has not fallen in 13 years. Modeled ice thickness and volume The plots show maps with sea ice thickness, and seasonal cycles of the calculated total arctic sea ice volume. The mean sea ice volume and standard deviation for the period 2004-2013 are shown with gray. The total sea-ice volume is a product of the sea-ice concentration and its thichness. CSV file of sea ice extent for the entire Northern Hemisphere and by region. Melting picks up pace during the spring as the sun gets stronger, and in September the extent of the ice cover …

MASIE uses the most recent full day of data from NIC, obtained nightly. The Arctic sea ice is melting, but global average temperatures are not significant: Cycles of the AMO and other regional phenomena are more impactful. Discussions about the amount of sea ice in the Arctic often confuse two very different measures of how much ice there is. Even without considering other sources of Arctic thickness and/or volume data it is quite clear from the two volume graphs that according to the Danish Meteorological Institue Arctic sea ice volume is significantly lower this year than it was in 2008. This year the Arctic sea ice volume is showing very impressive growth: As the chart above depicts, Arctic sea ice volume is near a 15-year high, is more than a …


The ice extent values are calculated from the ice type data from the Ocean and Sea Ice, Satellite Application Facility (), where areas with ice concentration higher than 15% are classified as ice. Melting picks up pace during the spring as the sun gets stronger, and in September the extent of the ice cover … According to the Danish Meteorological Institute, Arctic sea ice volume is growing rapidly, normal and the highest in several years.


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