极地研究2018，Vol.30Issue(2)：161-172,12.DOI:10.13679/j.jdyj.20170036
基于海冰密集度遥感数据的波弗特海海冰时空变化研究
ANALYSIS OF SPATIOTEMPORAL VARIABILITY OF SEA ICE IN THE BEAUFORT SEA USING PASSIVE MICROWAVE REMOTE SENSING DATA
摘要
Abstract
Based on daily and monthly sea ice concentration data, obtained from the National Snow and Ice Data Center, the 15％ sea ice concentration limit in the Beaufort Sea was used as a threshold to determine the lo-cation of the sea ice edge. After extracting the sea ice edge, we calculated the sea ice concentration, sea ice extent, and sea ice area. We then analyzed the spatiotemporal variabilities and trends of the retreat of the ice edge in the Beaufort Sea through interannual and seasonal changes. The results showed that sea ice concen-tration, sea ice extent, and sea ice area in the Beaufort Sea during 1978–2015 all had significant trends of reduction. During the study period, sea ice concentration decreased by an average of about 0.3％·a–1, sea ice extent decreased by an average of 3235 km2·a–1, and sea ice area decreased by an average of 5084 km2·a–1. Sea ice concentration during 1979–1996 showed no significant trend of decrease, although a trend of reduc-tion was evident during 1996–2015. The sea ice extent in the Beaufort Sea is at its maximum between No-vember and May (full ice coverage) and at its minimum in September. The sea ice area reaches its minimum in September and its maximum in December or January. The time of minimum sea ice extent appears to have become delayed. The state of total ice cover has tended to begin later, end earlier, and its duration (average: 212 d) has become shorter.关键词
波弗特海/被动微波遥感/海冰范围/海冰密集度/时空变化Key words
Beaufort Sea/passive microwave remote sensing/sea ice extent/sea ice concentration/spatio-temporal variability引用本文复制引用
刘玥,庞小平,赵羲,苏楚钦,季青..基于海冰密集度遥感数据的波弗特海海冰时空变化研究[J].极地研究,2018,30(2):161-172,12.基金项目
高等学校博士学科点专项科研基金(20130141120009)、国家重点研发计划(2016YFC1402704)资助 （20130141120009）
