期刊论文详细信息
JOURNAL OF HYDROLOGY 卷:571
The impact of the Madden-Julian Oscillation on hydrological extremes
Article
Peng, Jian1,2,3,4  Dadson, Simon1  Leng, Guoyong5  Duan, Zheng6,7  Jagdhuber, Thomas8  Guo, Weidong2  Ludwig, Ralf3 
[1] Univ Oxford, Sch Geog & Environm, Oxford OX1 3QY, England
[2] Nanjing Univ, Sch Atmospher Sci, Inst Climate & Global Change Res, Nanjing 210023, Jiangsu, Peoples R China
[3] Univ Munich LMU, Dept Geog, D-80333 Munich, Germany
[4] Max Planck Inst Meteorol, D-20146 Hamburg, Germany
[5] Univ Oxford, Environm Change Inst, Oxford OX1 3QY, England
[6] Univ Lancaster, Lancaster Environm Ctr, Lancaster LA1 4YQ, England
[7] Tech Univ Munich, Chair Hydrol & River Basin Management, D-80333 Munich, Germany
[8] German Aerosp Ctr DLR, Microwaves & Radar Inst, D-82234 Wessling, Germany
关键词: Madden-Julian Oscillation;    GLEAM;    Evaporative Stress Index;    CCI soil moisture;    GPCP precipitation;    ERA-Interim;   
DOI  :  10.1016/j.jhydrol.2019.01.055
来源: Elsevier
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【 摘 要 】

Extreme climate events such as severe droughts and floods have become more frequent and widespread in the 21st Century. Recent studies have revealed the tele-connections between Madden-Julian Oscillation (MJO) and extreme precipitation over different regions such as South America, India and China. This study investigates the influence of MJO on global extreme dry and wet conditions, and how the strength of the relationship changes across the MJO phases over the globe. The Evaporative Stress Index (ESI) calculated from global GLEAM evapotranspiration dataset is used to represent extreme dry and wet conditions. Strong correlations between MJO and extreme dry and wet conditions are found, particularly over monsoon regions such as South Asia, South America and East Africa. The underlying mechanism of the influence of MJO on extreme dry and wet conditions is associated with the variation of precipitation, air temperature and soil moisture modulated by the MJO. The study suggests that MJO impacts on extreme dry and wet conditions should be taken into account in investigation of droughts/floods around the world particularly over monsoon areas.

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