Abstract
This work assesses the AMSR2 (the Advanced Microwave Scanning Radiometer 2) ice extent and ice edge in the Arctic using the ice extent products of NOAA’s Interactive Multisensor Snow and Ice Mapping System (IMS) from the period of July 2015 to July 2019. Daily values and monthly means of four statistical scores (hit rate, false alarm ratio, false alarm rate, and Hanssen-Kuiper Skill Score) over the Arctic Ocean show distinct annual cycles. IMS ice edges often extend further south compared to those from AMSR2, with up to 100 km differences over the Beaufort, Chukchi, and East Siberian Seas in August and September.
Highlights
Sea ice regulates the energy and mass exchange between the atmosphere and the ocean
There have been dramatic changes in the Arctic sea ice properties in the last few decades [3,4,5,6,7], and the trends are expected to continue in the coming decades [8,9]
The comparison showed that Multisensor Analyzed Sea Ice Extent (MASIE) has higher Arctic sea ice extent than Sea Ice Index (SII) and AMSR-E throughout the year, except in the periods before the peak of the melt season (May-June) and at the end of the melt season and beginning of freeze-up
Summary
Sea ice regulates the energy and mass exchange between the atmosphere and the ocean. Satellite retrievals of cloud properties, radiation flux and many other physical variables depend on surface types, e.g., snow/ice from open water [1,2]. The comparison showed that MASIE has higher Arctic sea ice extent than SII and AMSR-E throughout the year, except in the periods before the peak of the melt season (May-June) and at the end of the melt season and beginning of freeze-up (late September-October).
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