%0 Journal Article
%T Asymmetric relationships between El NiŁżo/La NiŁża and floods/droughts in the following summer over Chongqing, China
%A Bo XIANG
%A Jie ZHOU
%A Yonghua LI
%J Atmospheric and Oceanic Science Letters
%D 2020
%R https://doi.org/10.1080/16742834.2020.1716432
%X ABSTRACT This study presents a detailed analysis of the asymmetric relationships between the warm/cold phase of the El NiŁżo¨CSouthern Oscillation and the typical flood/drought years in summer over Chongqing. Furthermore, its underpinning mechanisms are also explored. The results show that: (1) El NiŁżo and La NiŁża have an asymmetric influence on summer precipitation in the following year over Chongqing. Generally, the composite atmospheric circulation anomalies for El NiŁżo years are consistent with the composite results for typical flood years in summer over Chongqing, which indicates a tight link between typical flood years in summer over Chongqing and El NiŁżo events. However, the relationship between typical drought years in summer over Chongqing and La NiŁża events is not significant. (2) From winter to the following summer, the extent of positive SST anomalies in the equatorial eastern Pacific associated with typical flood years in summer over Chongqing shrinks, whereas in the tropical Indian Ocean, the extent slightly expands. This trend indicates that the impact of El NiŁżo on typical flood years in summer over Chongqing is maintained through the ˇ®relay effectˇŻ of SSTs in the tropical Indian Ocean, which is the result of a lagged response of positive SST anomalies in the tropical Indian Ocean to El NiŁżo events in winter. GRAPHICAL ABSTRAC
%U https://www.tandfonline.com/doi/full/10.1080/16742834.2020.1716432