违反了 PRIMARY KEY 约束 'PK_t_counter'。不能在对象 'dbo.t_counter' 中插入重复键。 语句已终止。 近30多年中国东北地区春季寒潮的年代际变化及其可能原因-Decadal Variability of Spring Cold Wave Across Northeast China in the Past 30 Years and Its Possible Causes
doi:  10.3878/j.issn.1006-9585.2017.16201
近30多年中国东北地区春季寒潮的年代际变化及其可能原因

Decadal Variability of Spring Cold Wave Across Northeast China in the Past 30 Years and Its Possible Causes
摘要点击 80  全文点击 165  投稿时间:2016-11-14  
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基金:  国家自然科学基金项目41575085、41575070、41430528,国家重点基础研究发展计划(973计划)2013CB430202
中文关键词:  春季寒潮  中国东北  年代际变化  北极海冰
英文关键词:  Cold wave in the spring  Northeast China  Decadal variability  Arctic sea ice
     
作者中文名作者英文名单位
唐孟琪TANG Mengqi南京信息工程大学气象灾害预报预警与评估协同创新中心/气象灾害教育部重点实验室, 南京 210044
曾刚ZENG Gang南京信息工程大学气象灾害预报预警与评估协同创新中心/气象灾害教育部重点实验室, 南京 210044
引用:唐孟琪,曾刚.2017.近30多年中国东北地区春季寒潮的年代际变化及其可能原因[J].气候与环境研究,22(4):473-486,doi:10.3878/j.issn.1006-9585.2017.16201.
Citation:TANG Mengqi,ZENG Gang.2017.Decadal Variability of Spring Cold Wave Across Northeast China in the Past 30 Years and Its Possible Causes[J].Climatic and Environmental Research(in Chinese),22(4):473-486,doi:10.3878/j.issn.1006-9585.2017.16201.
中文摘要:
      利用1979~2011年中国东北地区119站气温观测数据,对东北春季寒潮的年代际变化特征进行了分析,并在此基础上通过分析大气环流及北极海冰的变化,对寒潮年代际变化的可能原因进行了探讨。结果表明,东北地区春季寒潮的频次及强度在20世纪80年代末和21世纪初均有明显年代际转折,即20世纪90年代寒潮频次减少而强度增加,21世纪初寒潮频次有所回升但强度减弱。北极新地岛地区海冰的变化可能是造成我国东北地区寒潮活动年代际变化的原因之一。20世纪90年代新地岛附近海冰迅速减少,地表温度明显升高,而高纬海平面气压偏低,此处冷空气不易南下,同时东亚大槽偏强,冷空气强度增加。21世纪初该区海冰减少趋势减缓,冷空气频次有所回升,强度减弱。
Abstract:
      Based on 1979-2011 daily surface temperature data collected at 119 stations in Northeast China, the decadal variability of cold waves across Northeast China was investigated. The possible causes for the decadal changes were also discussed through analyzing changes in atmospheric circulation and Arctic sea ice. The frequency and intensity of spring cold waves across Northeast China both changed at the end of the 1980s and in the early 2000s. Cold waves in the 1990s were less frequent but stronger than those in the 1980s, and less frequent but weaker than those in the 2000s. The change in sea ice concentration around Novaya Zemlya was a possible cause for the decadal variability of spring cold waves in Northeast China. Rapid decrease in sea ice in Novaya Zemlya significantly increased surface air temperature (SAT) and weakened sea level pressure (SLP) in the high latitudes around this region, which were not favorable for the southward movement of cold air over Novaya Zemlya. In addition, the decrease in sea ice cover around this area and the deep East Asia trough could also lead to the strengthening of cold waves across Northeast China, while the cold waves in the 2000s became weaker but occurred more frequently possibly due to a slower decrease trend of sea ice cover in Novaya Zemlya.
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