Solar activity modulates the El Niño-Southern Oscillation-induced precipitation anomalies over southern China in early spring
Solar activity modulates the El Niño-Southern Oscillation-induced precipitation anomalies over southern China in early spring
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太阳活动调节厄尔尼诺南方涛动引起的华南早春降水异常
DOI：
10.1002/joc.7214
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发表时间：
2021
期刊：
影响因子：
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通讯作者：
Li Xiao
中科院分区：
文献类型：
--
作者：
Ma Hedi;Wang Ruili;Lai Anwei;Li Xing;Wang Feiyang;Zhou Zhimin;Li Xiao
本研究发现，厄尔Niño -南方涛动（ENSO）对中国南方早春（2 - 3月）降水影响的空间格局存在明显的太阳周期调制。在太阳活动高/低（HS/LS）年，冬季Niño 3.4指数与随后的早春降水的显著正相关主要集中在中国东南部/长江流域（SEC/YRV）。在两个太阳相下，降水异常表现出ENSO冷暖事件的不对称性。在HS年，ENSO暖事件相关的中国南方降水异常较弱，但在ENSO冷事件期间，SEC地区出现了明显的干燥异常。在LS年，在ENSO暖事件期间，YRV地区存在显著的降水异常，而在ENSO冷事件期间，降水异常不显著。这些对降水的调节是由ENSO相关的北太平洋西部异常反气旋/气旋的变化介导的，这可能归因于太阳对ENSO相关的海面温度异常的调节。我们的研究结果强调，当使用ENSO作为东亚降水的预测因子时，应考虑太阳活动水平。[在首次在线发表后，于2021年6月18日添加了更正：摘要和图形摘要的文本在原始发表的文章中互换了。]此更新版本更正了错误。]
The present study identifies an evident solar cycle modulation upon the spatial pattern of the El Niño‐Southern Oscillation (ENSO) impact on the southern China precipitation in early spring (February–March). During high/low solar activity (HS/LS) years, the significant positive correlation between the wintertime Niño 3.4 index and the precipitation in the following early spring mainly locates at the southeastern China/Yangtze River Valley (SEC/YRV). Our analysis also suggests that the precipitation anomalies show asymmetries between ENSO warm and cold events under both solar phases. In HS years, the ENSO warm events‐related rainfall anomalies over the southern China are weak, but during the ENSO cold events significant dry anomalies appear at the SEC region. In LS years, significant wet anomalies over the YRV region are found during the ENSO warm events, whilst the rainfall anomalies are insignificant for the ENSO cold events. These modulations on precipitation are mediated by the changes in the ENSO‐associated anomalous western North Pacific anticyclone/cyclone, which may be attributed to the solar modulations on the ENSO‐associated sea surface temperature anomalies. Our results highlight that the level of solar activity should be taken into account when ENSO is used as a predictor for the precipitation over East Asia. [Correction added on 18 June 2021, after first online publication: The text for the abstract and graphical abstract were interchanged in the original‐published article. This updated version rectifies the error.]