Extreme Lake Level Changes on the Tibetan Plateau Associated With the 2015/2016 El Nino
Extreme Lake Level Changes on the Tibetan Plateau Associated With the 2015/2016 El Nino
复制标题
2015/2016年厄尔尼诺现象引起的青藏高原湖泊水位极端变化
DOI：
10.1029/2019gl081946
复制
发表时间：
2019-06-16
影响因子：
5.2
通讯作者：
Ma, Ning
中科院分区：
文献类型：
--
作者：
Lei, Yanbin;Zhu, Yali;Ma, Ning
虽然厄尔尼诺-南方涛动对青藏高原（TP）的影响可以通过降水和冰芯的稳定同位素反映出来，但青藏高原湖泊对厄尔尼诺-南方涛动的水文气候响应却很少有人研究。在这里，我们发现，由于2016年厄尔尼诺/2016年厄尔尼诺事件的降水量急剧减少，TP中部（CTP）出现了显着的湖水赤字，随后在2016年和2017年，TP的大部分地区（东部CTP除外）出现了极端的湖水盈余。在历史上的厄尔尼诺事件中也可以发现类似但较弱的湖泊萎缩和随后的扩张。进一步的研究表明，厄尔尼诺事件期间的CTP干异常倾向于桥接印度和中国北方的干异常，从而形成沿着亚洲季风域西北边缘的干带。该研究为湖泊水位变化对TP的预测提供了参考。
Although the impact of El Nino-Southern Oscillation on the Tibetan Plateau (TP) is reflected through stable isotopes of precipitation and ice cores, the hydroclimate response of TP lakes to El Nino-Southern Oscillation is seldom investigated. Here we show that significant lake water deficit occurred on the central TP (CTP) due to a dramatic decrease in precipitation 2016 El Ni/2016 El Nino event, followed by extreme lake water surplus in 2016 and 2017 over most of the TP (except the eastern CTP). Similar but weaker lake shrinkage and afterward expansion can also be found during historical El Nino events. Further exploration reveals that the CTP dry anomaly during El Nino events tends to bridge the dry anomalies over India and northern China, thereby forming a dry zone along the northwestern edge of the Asian monsoon domain. This study may shed light on the prediction of lake level changes on the TP.