北京师范大学全球变化与地球系统科学研究院
北京师范大学全球变化与地球系统科学研究院
   
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 The Variations in Middle and Upper Stratospheric Water Vapour
over the Past Two Decades

Fei Xie1, 2, Jianping Li1, 2, Wenshou Tian3, Xin Zhou4, 5 and Xuan Ma1,2

 

1 College of Global Change and Earth System Science, Beijing Normal University, Beijing, China

2 Joint Center for Global Change Studies, Beijing, China

3 Key Laboratory for Semi-Arid Climate Change of the Ministry of Education, College of Atmospheric Sciences, Lanzhou University, China

4 State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China

5 University of Chinese Academy of Sciences, Beijing, China

 

Abstract

The radiative and chemical interactions of stratospheric water vapour (SWV) mean that SWV has a significant influence on the climate. Based on the Stratospheric Water and OzOne Satellite Homogenized (SWOOSH) SWV data (100−1 hPa, 60°S to 60°N), variations in the middle and upper SWV are mainly investigated over the past two decades. Water vapour variations below 10 hPa are found to result from upward transport of the lower SWV.

Using empirical orthogonal function analysis and regression analysis of the anomalous upper SWV variability, it is found that upper SWV variations have an 11-year period controlled by the solar cycle as well as a 2-year cycle regulated by the quasi-biennial oscillation (QBO). Our results also show that state-of-the-art chemistry–climate models perform poorly in simulating the upper SWV variations. It is possibly because the effect of lower–middle SWV changes on the upper SWV variations is too strong in the simulations.

 

PUBLISHED BY : SOLA,  12, 127−134, doi: 10.2151/sola.2016-028

SOURCE:https://www.jstage.jst.go.jp/article/sola/12/0/12_2016-028/_article