摘要
依据对2000/2001—2014/2015年冬季渤海海冰范围和海平面气压(SLP)场季节内和年际变化的分析表明,SLP场与海冰范围关系密切,其中西伯利亚高压、冰岛低压附近为正相关区,亚速尔高压附近为负相关区。西伯利亚高压的变化在季节内和年际尺度上同时影响渤海海冰,北大西洋涛动(NAO)与渤海海冰的相关性主要表现在年际尺度上。研究表明,渤海海冰逐年冬季的季节内变化有所不同,在2003/2004、2004/2005、2007/2008年存在9~12候的显著周期,与大气30~60d的季节内振荡相对应,但在2009/2010年以后这一周期没有再出现,而西伯利亚高压相关区SLP的9~12候信号在整个研究时段相对较明显,这可以解释在季节内尺度上西伯利亚相关区与海冰范围的相关性在2009/2010年以后明显减小的现象;在年际尺度上,2007/2008年以后NAO(冰岛和亚速尔相关区SLP)与海冰范围的相关性突然增大,这一变化是由NAO和海冰范围(渤海地区气温)的2~4年和4~8年周期从2007/2008年开始更加契合引起的。NAO年际周期的变化可能会通过大气环流的北极-亚洲遥相关模态对渤海海冰范围产生影响。
After analyzing the relationship between Sea Level Pressure(SLP)and Bohai sea ice extent during the winter of 2000/2001-2014/2015 on the intra-seasonal and inter-annual scales,three main correlation areas were found around Siberian High(positive),Iceland Low(positive)and Azores High(negative).Siberia high affects Bohai sea ice both in intra-seasonal and inter-annual scales,and the correlation between North Atlantic Oscillation(NAO)and Bohai sea ice is mainly on the inter-annual scale.Research shows that the Bohai sea has remarkable cycle of 9~12 pentads in 2003/2004,2004/2005 and 2007/2008.This cycle disappear after 2009/2010,but the Siberia high SLP still maintain a period of 9~12 pentads,which can be explained the season why the correlation coefficient between Siberian High and sea ice extent reduced significantly after the winter of 2009/2010.On the inter-annual scale,the correlation coefficient between NAO and sea ice extent increased rapidly after 2007/2008 due to the same periodic variation of 2~4 years and 4~8 years of NAO and Bohai air temperature.This shift may have a influence on Bohai sea ice extent through the Arctic-Asian teleconnection pattern.
作者
药蕾
苏洁
YAO Lei;SU Jie(The Key Laboratory of Physical Oceanography,Ministry of Education,Ocean University of China,Qingdao 266100,China;Qingdao National Laboratory for Marine Science and Technology,Qingdao 266100,China)
出处
《中国海洋大学学报（自然科学版）》
CAS
CSCD
北大核心
2018年第6期1-12,共12页
Periodical of Ocean University of China
基金
气象公益性行业项目(GYHY201306049)
国家自然科学委员会基金项目(41676189)资助~~
关键词
渤海
海冰
季节内变化
年际变化
Bohai Sea
sea ice
intra-seasonal
inter-annual variations
