| 巴伦支-喀拉海海温和青藏高原冬季地表气温的年代际联系 |
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| 引用本文： | 郑锦文,左志燕,蔺邹兴,肖栋.巴伦支-喀拉海海温和青藏高原冬季地表气温的年代际联系[J].冰川冻土,2022,44(5):1513-1522. |
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| 作者姓名： | 郑锦文 左志燕 蔺邹兴 肖栋 |
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| 作者单位： | 1.中国气象科学研究院 灾害天气国家重点实验室，北京 100089;2.复旦大学 大气与海洋科学系/大气科学研究院，上海 200082;3.上海长江河口湿地生态系统国家野外科学观测研究站，上海 202150;4.上海市海洋-大气相互作用前沿科学研究基地，上海 200438;5.中国气象局 上海城市气候变化应对重点开放实验室，上海 200030;6.上海市气候中心，上海 200030 |
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| 基金项目： | 国家自然科学基金项目(41822503);国家重点研发计划项目(2016YFA0601502) |
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| 摘 要： | 基于1961—2017年中国气象局地表气温数据、JRA-55大气再分析数据以及美国国家海洋和大气管理局延伸重建的海温资料，研究了青藏高原冬季地表气温的年代际变化特征及其与海温的可能联系。结果表明：巴伦支-喀拉海冬季海温年代际变化可以激发出向东传播的Rossby波，在西伯利亚对流层高层产生异常的气旋或反气旋性环流，通过影响副极地以及副热带西风急流强度，在青藏高原的南侧产生异常的反气旋或气旋性环流，从而使得青藏高原上空的垂直运动发生变化，导致青藏高原冬季地表气温异常。
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| 关 键 词： | 青藏高原 冬季地表气温 年代际变化 大气环流 |
| 收稿时间： | 2022-02-22 |
| 修稿时间： | 2022-10-05 |
Interdecadal relationship between sea surface temperature （SST） of Barents-Kara Sea and wintertime air surface temperature of Qinghai-Tibet Plateau |
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| Jinwen ZHENG,Zhiyan ZUO,Zouxing LIN,Dong XIAO.Interdecadal relationship between sea surface temperature （SST） of Barents-Kara Sea and wintertime air surface temperature of Qinghai-Tibet Plateau[J].Journal of Glaciology and Geocryology,2022,44(5):1513-1522. |
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| Authors: | Jinwen ZHENG Zhiyan ZUO Zouxing LIN Dong XIAO |
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| Abstract: | The Qinghai-Tibet Plateau is an important region due to its dynamic and thermal effect. In view of the fact that air surface temperature increase rate of Qinghai-Tibet Plateau in winter is much higher than that in summer， the extreme climate sensitivity and important research value of Qinghai-Tibet Plateau， and the lack of research status on the thermal condition of Qinghai-Tibet Plateau in winter， it is of great significance to study the thermal condition of Qinghai-Tibet Plateau in winter. Based on the air surface temperature data of China Meteorological Administration， JRA-55 reanalysis data and NOAA extended reconstructed sea surface temperature data from 1961 to 2017， the interdecadal characteristics and the linkage with sea surface temperature for the air surface temperature of Qinghai-Tibet Plateau in winter are studied. The wintertime air surface temperature of Qinghai-Tibet Plateau presents a 16-years interdecadal variation signal. Further correlation analysis shows an apparent interdecadal relationship between the air surface temperature of Qinghai-Tibet Plateau and the sea surface temperature anomaly in Barents-Kara Sea. The abnormal warming or cooling of sea surface temperature of Barents-Kara Sea in winter causes the convergence and divergence of local upper atmosphere anomalies， resulting in the anomaly of 300 hPa geopotential height and the oscillation of geopotential height field causes the propagation of Rossby wave. The Rossby wave generated by Barents-Kara Sea propagates eastward， affecting Siberia and causing the anomaly of geopotential height. At the same time， the abnormal convergence or divergence is generated， accompanied by the enhancement or weakening of the subtropical westerly jet in the north and south of Siberia， respectively. The corresponding shear caused by the strengthening or weakening of the subtropical westerly jet produces abnormal convergence or divergence in the upper layer of Qinghai-Tibet Plateau， the subsequent abnormal subsidence or ascent will modulate the plateau air surface temperature through the diabatic heating process. |
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| Keywords: | Qinghai-Tibet Plateau wintertime air surface temperature interdecadal variation atmospheric circulation |
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