1971—2020年El Nino事件对珠峰地区冬季气候可能的影响

Influence of El Nino Event on Winter in Everest Region from 1971 to 2020 Possible Impacts of Climate

对比分析了不同类型El Nino事件对珠峰地区冬季降水和气温的影响,结果表明:(1)El Nino事件当年大部地区降水偏少,翌年大部地区偏多;东部型当年大部地区偏少,翌年大部地区偏多;中部型当年帕里和中西部偏少外各地偏多,翌年大部地区偏多。(2)在El Nino当年,冬季降水距平随El Nino的峰值强度呈反比,El Nino强度越强;在El Nino翌年,冬季降水距平随El Nino的峰值强度的相关性不显著。(3)珠峰地区冬季降水量与同期赤道中西部太平洋的海温呈负相关,与赤道中东太平洋、赤道印度洋和赤道大西洋呈较明显的正相关。

The effects of different types of El Nino events on winter precipitation and temperature in Everest were compared and analyzed.The results showed that:(1)most of the precipitation in El Nino event was less in that year and more in the next year;Most of the eastern type were less in the current year,and most of the eastern type were more in the next year;In the year of El Nino,the winter precipitation anomaly was inversely proportional to the peak intensity of El Nino,and the intensity of El Nino is stronger.In the following year of El Nino,the correlation between winter precipitation anomaly and the peak intensity of El Nino was not significant.(3)The winter precipitation in Everest is negatively correlated with the SST in the equatorial central and Western Pacific,and significantly positively correlated with the equatorial Middle East Pacific,Equatorial Indian Ocean and equatorial Atlantic.