Arctic Sea Ice Variations in the First Half of the 20th Century:A New Reconstruction Based on Hydrometeorological Data  

作　　者：Vladimir A.SEMENOV Tatiana A.ALDONINA Fei LI Noel Sebastian KEENLYSIDE Lin WANG 

机构地区：[1]A.M.Obukhov Institute of Atmospheric Physics RAS,Moscow 119017,Russia [2]Institute of Geography RAS,Moscow 119017,Russia [3]Geophysical Institute,University of Bergen and Bjerknes Centre for Climate Research,Bergen 5007,Norway [4]Nansen Environmental and Remote Sensing Center,Bergen 5007,Norway [5]Center for Monsoon System Research,Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,China

出　　处：《Advances in Atmospheric Sciences》2024年第8期1483-1495,1686-1693,共21页大气科学进展（英文版）

基　　金：partly supported by the Russian Ministry of Science and Higher Education (Agreement No.075-15-2021-577);the Russian Science Foundation (Grant No.23-47-00104);funded by the Research Council of Norway (Grant No.Combined 328935);the support of the Bjerknes Climate Prediction Unit with funding from the Trond Mohn Foundation (Grant No.BFS2018TMT01);the support of the National Natural Science Foundation of China (Grant No.42261134532)。

摘　　要：The shrinking Arctic sea-ice area(SIA) in recent decades is a striking manifestation of the ongoing climate change.Variations of the Arctic sea ice have been continuously observed by satellites since 1979, relatively well monitored since the 1950s, but are highly uncertain in the earlier period due to a lack of observations. Several reconstructions of the historical gridded sea-ice concentration(SIC) data were recently presented based on synthesized regional sea-ice observations or by applying a hybrid model–empirical approach. Here, we present an SIC reconstruction for the period1901–2019 based on established co-variability between SIC and surface air temperature, sea surface temperature, and sea level pressure patterns. The reconstructed sea-ice data for March and September are compared to the frequently used Had ISST1.1 and SIBT1850 datasets. Our reconstruction shows a large decrease in SIA from the 1920 to 1940 concurrent with the Early 20th Century Warming event in the Arctic. Such a negative SIA anomaly is absent in Had ISST1.1 data. The amplitude of the SIA anomaly reaches about 0.8 mln km^(2) in March and 1.5 mln km^(2) in September. The anomaly is about three times stronger than that in the SIBT1850 dataset. The larger decrease in SIA in September is largely due to the stronger SIC reduction in the western sector of the Arctic Ocean in the 70°–80°N latitudinal zone. Our reconstruction provides gridded monthly data that can be used as boundary conditions for atmospheric reanalyses and model experiments to study the Arctic climate for the first half of the 20th century.

关 键 词：Arctic sea ice Arctic climate early 20th century warming climate variability 

分 类 号：P941.62[天文地球—自然地理学] P731.15