Evaluation of Sea Ice Concentration Data Using Dual-Polarized Ratio Algorithm in Comparison With Other Satellite Passive Microwave Sea Ice Concentration Data Sets and Ship-Based Visual Observations

The dual-polarized ratio (DPR) algorithm is a new that enable calculation of Arctic sea ice concentration from the 36.5-GHz channel sensor Advanced Microwave Scanning Radiometer for EOS/Advanced 2 (AMSR-E/AMSR2). In this paper, we demonstrate results data using DPR (DPR-AMSR) are evaluated and compared with other eight products respect to differences in concentration, area, extent. On pan-Arctic scale, evaluation mostly very similar between DPR-AMSR bootstrap AMSR-E/AMSR2 (BT-AMSR), SSM/I or SSMIS (BT-SSMI), ARTIST Sea Ice (ASI-AMSR), enhanced NASA Team (NT2-AMSR). Among these products, agree within ±5%. However, European Space Agency Climate Change Initiative (SICCI-AMSR), Organisation Exploitation Meteorological Satellites Ocean Satellite Application Facility (OSI-SSMI), (ASI-SSMI), (NT1-SSMI) all lower than at edge. And NT1-SSMI had largest negative difference, which was -15% even 20%.The difference area consistently ±0.5 million km BT-AMSR, BT-SSMI, ASI-AMSR, NT2-AMSR years. smallest BT-SSMI (less 0.1 ), whereas (up 1.5 ). comparisons extent, NT1-SSMI, estimates were consistent . exceeded 0.5 sets. When ship-based visual observation (OBS) values ranged 85% 100%, OBS less 1%. There relatively large when recorded during summer, although those also 10%.