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Spatial and temporal variations of precipitation concentration and their relationships with large-scale atmospheric circulations across Northeast China

文献类型： 外文期刊

作者： Wang, Rui 1 ; Zhang, Jiquan 1 ; Guo, Enliang 4 ; Zhao, Chunli 7 ; Cao, Tiehua 8 ;

作者机构： 1.Northeast Normal Univ, Sch Environm, 2555 Jingyue St, Changchun 130117, Jilin, Peoples R China

2.Northeast Normal Univ, State Environm Protect Key Lab Wetland Ecol & Veg, 2555 Jingyue St, Changchun 130117, Jilin, Peoples R China

3.Minist Educ, Key Lab Vegetat Ecol, 2555 Jingyue St, Changchun 130117, Jilin, Peoples R China

4.Inner Mongolia Normal Univ, Coll Geog Sci, 81 Zhaowuda, Saihan 010022, Hohhot, Peoples R China

5.Inner Mongolia Normal Univ, Inner Mongolia Key Lab Disaster & Ecol Secur Mong, 81 Zhaowuda, Saihan 010022, Hohhot, Peoples R China

6.Inner Mongolia Normal Univ, Inner Mongolia Key Lab Remote Sensing & Geog Info, 81 Zhaowuda, Saihan 010022, Hohhot, Peoples R China

7.Jilin Agr Univ, Sch Hort, 2888 Xincheng St, Changchun 130117, Jilin, Peoples R China

8.Jilin Acad Agr Sci, Inst Agr Resources & Environm, 1365 Shengtai St, Changchun 130117, Jilin, Peoples R China

关键词： Concentration index; Large-scale atmosphere circulation; Spatial-temporal patterns; Correlation; Northeast China

期刊名称：ATMOSPHERIC RESEARCH （ 影响因子：5.369； 五年影响因子：5.458 ）

ISSN： 0169-8095

年卷期： 2019 年 222 卷

页码：

收录情况： SCI

摘要： Understanding the trends of precipitation concentration play a key role in watershed development and management. In this study, spatiotemporal and abrupt changes in the concentration index (CI) and their relationships with summer large-scale atmospheric circulations over Northeast China (NEC) were discovered. We used daily precipitation data from 71 meteorological stations and five large-scale atmosphere circulation indices for the period 1961-2016 across NEC. The results show that annual daily precipitation concentration in NEC decreased slightly in most areas. The spatial distribution of the CI ranges from 0.64 to 0.7 and the regions of the highest value were in Liaoning Province. The correlation between CI and different large-scale atmospheric indices show significant differences and mainly depend on the regional differences. Pacific Decadal Oscillation (PDO) and North Atlantic Oscillation (NAO) are negatively correlated with the CI in most regions of NEC, in contrast to the East Asian summer monsoon index (EASMI) and Multivariate ENSO Index (MEI). The Southern Oscillation Index (SOI) is negatively correlated with the CI in Liaoning Province and positivity correlated with the CI in Jilin and most of Heilongjiang Province. Compared to before 1975, a Eurasian continent anticyclonic circulation anomaly caused more clear days and higher solar radiation during 1976-2016.

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