Seasonal evolution of the effects of the El Nino–Southern Oscillation on lower stratospheric water vapor:Delayed effects in late winter and early spring

作     者：YuJing Liao QuanLiang Chen Xin Zhou 

作者机构：School of Atmospheric SciencesChengdu University of Information Technology and Plateau Atmosphere and Environment Key Laboratory of Sichuan Province 

出 版 物：《Earth and Planetary Physics》 (地球与行星物理（英文版）)

年 卷 期：2019年第3卷第6期

页      面：489-500页

核心收录：

学科分类：07[理学] 

基　　金：the National Key Research and Development Program on Monitoring,Early Warning,and Prevention of Major Natural Disasters(2018YFC1506006) the National Natural Science Foundation of China(41875108) 

主　　题：El Nino-Southern Oscillation stratospheric water vapor seasonal evolution 

摘      要：Water vapor in the stratosphere makes a significant contribution to global climate change by altering the radiative energy budget of the Earth’s climate *** many previous studies have shown that the El Ni?o–Southern Oscillation(ENSO)has significant effects on the water vapor content of the stratosphere in terms of the annual or seasonal mean,a comprehensive analysis of the seasonal evolution of these effects is still *** reanalysis data and satellite observations,we carried out a composite analysis of the seasonal evolution of stratospheric water vapor during El Ni?o/La Ni?a peaks in winter and decays in *** ENSO has a distinct hysteresis effect on water vapor in the tropical lower *** El Ni?o/La Ni?a events moisten/dry out the tropical lower stratosphere in both winter and spring,whereas this wetting/dehydration effect is more significant in *** pattern is due to a warmer temperature in the upper troposphere and lower stratosphere during the El Ni?o spring phase,which causes more water vapor to enter the stratosphere,and vice versa for La Ni?*** delayed warming/cooling in the lower stratosphere during the El Ni?o/La Ni?a decay in spring leads to the seasonal evolution of ENSO effects on water vapor in the lower stratosphere.