极地研究Issue(4)：364-378,15.DOI:10.13679/j.jdyj.2015.4.364
北半球夏季中高纬度大气阻塞对北极海冰变化的影响
EFFECT OF NORTHERN HEMISPHERE MID-HIGH LATITUDE BLOCKING ON THE VARIATION OF SUMMER ARCTIC SEA ICE
摘要
Abstract
The relationship between mid-high latitude blocking in the northern hemisphere and the decline in Arctic sum-mer sea ice was investigated using National Centers for Environmental Prediction /National Center for Atmospheric Research daily 500 hPa geopotential height reanalysis data .Results show that there are high blocking frequencies o-ver the Bering Strait , the Okhotsk Sea , Eurasia , and Greenland , which correlate closely with the areas of reduced Arctic summer sea ice in the past 30 years as observed from satellite data .Differences in surface temperature , me-ridional heat transport and temperature advection in 850 hPa anomaly fields between days with and without blocking were calculated and the results show that mid-high latitude blocking has a significant impact on the reduction in sea ice.An increase in blocking frequency in northern hemisphere mid-high latitudes will increase the surface air tem-perature , poleward heat transport , and temperature advection , further accelerate the melting of Arctic sea ice . Therefore, thermodynamic effects caused by blocking over the Okhotsk Sea and Eurasia could result in a marked re -duction in Arctic sea ice .关键词
北极海冰/北极增暖/阻塞Key words
Arctic sea ice/Arctic amplification/blocking引用本文复制引用
肖贻青,黄斌,刁一娜,罗德海..北半球夏季中高纬度大气阻塞对北极海冰变化的影响[J].极地研究,2015,(4):364-378,15.基金项目
全球变化研究国家重大科学研究计划（2015CB953903）和国家自然科学基金重点项目（41430533）资助 （）
