中国科学院大气物理研究所郎咸梅团队研究了春季巴伦支海冰对青藏高原夏季降水的影响。相关论文于2025年3月17日发表在《大气科学进展》杂志上。

春季（4月-5月-6月）巴伦支海冰已被证明会影响青藏高原（TP）的夏季地表气温。然而，其对夏季（6月-7月-8月）TP降水（一个关键的气候组成部分）的影响仍未得到探索。课题组研究了1979年至2018年春季巴伦支海冰与随后夏季TP降水之间的物理联系。

结果表明，春季巴伦支海冰高于正常水平会导致夏季TP降水过多，反之亦然。春季，更多的巴伦支海冰导致当地和周围地区显著降温和沉降。巴伦支海的降温可能持续到夏季，引发沿东经60°的经向波浪状模式，进而导致里海及其邻近东部地区的异常大气沉降。这改变了200百帕的辐合并调节了丝绸之路模式（SRP）。因此，热带气旋异常在热带气旋以西形成，这增强了向热带气旋的水分输送，并增加了夏季的降水量。数值实验再现了这些物理过程，并进一步支持了该结论。

附：英文原文

Title: Impact of spring Barents Sea ice on summer Tibetan Plateau precipitation

Author: Xianmei Lang, Yizhe Han, Dong Si, Jiapeng Miao, Dabang Jiang

Issue&Volume: 2025-03-17

Abstract: The spring (April–May–June) Barents Sea ice has been proven to affect the summer surface air temperature over the Tibetan Plateau (TP). However, its impact on summer (June–July–August) TP precipitation, a crucial climate component, remains unexplored. We investigate the physical linkage between spring Barents Sea ice and subsequent summer TP precipitation from 1979 to 2018. Our results indicate that above-normal spring Barents Sea ice leads to excessive summer TP precipitation, and vice versa. During spring, more Barents Sea ice induces remarkable cooling and subsidence over there and surrounding areas. The cooling over the Barents Sea can persist into summer, triggering a meridional wave-like pattern along the longitude of 60°E and, in turn, an anomalous atmospheric subsidence over the Caspian Sea and the eastern region adjacent to it. This alters 200 hPa convergence and modulates the Silk Road pattern (SRP). As a result, cyclonic anomalies form to the west of the TP, which enhance moisture transport toward the TP and increase its precipitation during summer. Numerical experiments reproduce these physical processes and further support our conclusions.

DOI: 10.1007/s00376-025-4383-z

Source: http://www.iapjournals.ac.cn/aas/en/article/doi/10.1007/s00376-025-4383-zviewType=HTML