RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2019, Vol. 28 >> Issue (02): 469-482.doi: 10.11870/cjlyzyyhj201902023
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LI Yan, MA Bai-sheng, YANG Xuan
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Abstract: Using the daily precipitation data in China and the IRESST global sea surface temperature data during 1979-2010, the effects of the Eastern-Pacific and Central-Pacific El Nio/La Nia events on the extreme precipitation and the general precipitation events in eastern China during the period from maturity to recession were studied to reveal the proportion of the extreme precipitation and general precipitation of the total influencing by the two kinds of ENSO events. The results show that, the extreme precipitation accounts for more than half of the total precipitation in winter, spring, and summer, which proportion is the biggest in winter and smallest in summer. Besides, the proportion that the extreme precipitation accounts for in the north of the Yangtze River is higher than that in the south of the Yangtze River. Furthermore, when the two types of ENSO occur, the spatial distribution characteristics of the extreme precipitation anomalies in eastern China are basically consistent with that of the total precipitation anomalies in the region. However, the features of the general precipitation anomalies in this area show a large difference from those of the total and extreme precipitation. The above shows that the two types of ENSO events affect the distribution feature of total precipitation anomalies in eastern China mainly through affecting the extreme precipitation anomalies. From the comparison of the two types of ENSO events, the effect of the Eastern-Pacific ENSO on the extreme precipitation in eastern China is significantly stronger than that of the Central-Pacific ENSO. In addition, under the influence of two types of ENSO events, the distribution characteristics of the extreme precipitation are also different. On this basis, the impact of the four strongest ENSO events during the period of 1979-2010 on the extreme precipitation in eastern China are analyzed. It turns out that the influence of the strongest ENSO events on the extreme precipitation is also much stronger than that of the general precipitation, and the anomalous distribution features of the extreme precipitation are basically consistent with the total precipitation anomalies. However, when the strongest ENSO events occur, the abnormal magnitude variation of the extreme precipitation and total precipitation in eastern China are greater than that of the general ENSO events.
LI Yan, MA Bai-sheng, YANG Xuan. Impact of Two Types of ENSO Events on the Extreme Precipitation in Eastern China[J].RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN, 2019, 28(02): 469-482.
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URL: https://yangtzebasin.whlib.ac.cn/EN/10.11870/cjlyzyyhj201902023
https://yangtzebasin.whlib.ac.cn/EN/Y2019/V28/I02/469
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