[1]MENG Xin,ZHANG Yu,GAO Songying,et al.Characteristics of Midsummer Precipitation in Northeast China During the Last 60 Years and Its Relationship with Different Types El Nio Events[J].Research of Soil and Water Conservation,2022,29(02):170-178.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
29
Number of periods:
2022 02
Page number:
170-178
Column:
Public date:
2022-03-20
- Title:
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Characteristics of Midsummer Precipitation in Northeast China During the Last 60 Years and Its Relationship with Different Types El Niño Events
- Author(s):
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MENG Xin1, ZHANG Yu2, GAO Songying1, XU Lulu1, SHAN Lulu1, FAN Xibin1
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(1.Dandong Meteorological Bureau of Liaoning, Dandong, Liaoning 118000, China; 2.State Key Laboratory of Geographic Information Engineering, Xi'an 710054, China)
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- Keywords:
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northeast China; midsummer precipitation; Eastern-Pacific ENSO; Central-Pacific ENSO
- CLC:
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P426.6
- DOI:
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- Abstract:
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Based on the daily precipitation data at 204 meteorological stations within northeast China from National Meteorological Information Centre, ENSO data from National Climate Centre, and monthly reanalysis data provided by the National Centers for Environmental Prediction and the National Center for Atmospheric Research during 1961—2019, characteristics of midsummer precipitation in northeast China during the last 60 years and its relationship with different types El Niño Events were analyzed. The main results are as follows.(1)The midsummer precipitation was more from 1990s to the beginning of the 21st century, after 2010, an ascending precipitation had been seen. The annual precipitation of midsummer decreased at a rate of 5.386 mm/decade from 1961 to 2019, which was mainly due to the decrease of light rain and moderate rain, but the rate of precipitation reduction had slowed in recent years.(2)The spatial distribution of precipitation trend presented decreasing trend. The spatial distribution of light rain trend experienced decreasing trend, while the decreasing precipitation in Liaoning Province was most significant, all stations(50 stations)showed a certain decreasing trend, among which 37 stations showed a significant decreasing trend. Moreover, a certain decreasing trend of moderate rain and heavy rain were showed, however, they were insignificant. The number of stations that showed an increasing trend about storm rain was comparable to the number of those that showed a decreasing trend, a certain increasing trend was showed in Heilongjiang Province.(3)In the following midsummer years of two types El Niño events, the regional precipitation in northeast China was both more than that in the normal years, the CP type was more. In the following midsummer of EP El Niño events, there was anomalously more precipitation in Liaoning Province, the precipitation in Jilin Province presented a dipole-type of ‘+-' inverse distribution from northwest to southeast, the precipitation in Inner Mongolia Autonomous Region was anomalously more, the precipitation in Heilongjiang Province was anomalously less, there was significantly less precipitation in partial areas of Heilongjiang Province. To CP El Niño events, there was anomalously more precipitation in Liaoning Province, the precipitation in Jilin Province presented a dipole-type of ‘-+' inverse distribution from north to south, the precipitation in Inner Mongolia Autonomous Region was anomalously less, there was significantly less precipitation in partial areas of Inner Mongolia Autonomous Region, the precipitation in Heilongjiang Province was more than that in the normal years. Therefore, El Niño events can be used as one of predictors for the precipitation of the following midsummer in northeast China.