Non-uniform changes in different categories of precipitation intensity across China and the associated large-scale circulations
This study focuses on changing trends in precipitation across mainland China during the period 1957–2014. We explore the influence of the El Niño–Southern Oscillation (ENSO), the Pacific Decadal Oscillation (PDO), and related large-scale atmospheric circulation variables on the changes in precipitat...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2019-01-01
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| Series: | Environmental Research Letters |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1748-9326/aaf306 |
| _version_ | 1797748169558196224 |
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| author | Chiyuan Miao Qingyun Duan Qiaohong Sun Xiaohui Lei Hu Li |
| author_facet | Chiyuan Miao Qingyun Duan Qiaohong Sun Xiaohui Lei Hu Li |
| author_sort | Chiyuan Miao |
| collection | DOAJ |
| description | This study focuses on changing trends in precipitation across mainland China during the period 1957–2014. We explore the influence of the El Niño–Southern Oscillation (ENSO), the Pacific Decadal Oscillation (PDO), and related large-scale atmospheric circulation variables on the changes in precipitation. The number of wet days showed statistically significant downward trends in North China, Jianghuai, South China, and Southwest of China, but upward trends on the Tibetan Plateau and in Northwest China. However, the number of very wet days increased in Jianghuai, South China and regions in Southwest China, and there was an increase in the spatial variability of a number of rainfall extremes over China. Because the changes in the frequency of wet days and very wet days were non-uniform, an increasing percentage of the total annual precipitation was derived from extreme events over large regions of mainland China. The ENSO and the PDO had a zonal influence on precipitation variability through the modulation of large-scale atmospheric circulation. Both the number of wet days and the frequency of extreme precipitation increased in southern Jianghuai and South China in El Niño years compared with La Niña years. A decrease (increase) in the number of wet days was observed in northern China (southeastern China) during positive PDO-phase years, which was likely a response to the large decrease in Southerly winds. |
| first_indexed | 2024-03-12T16:02:05Z |
| format | Article |
| id | doaj.art-e23de3f8498147718bf5429f9c0d3276 |
| institution | Directory Open Access Journal |
| issn | 1748-9326 |
| language | English |
| last_indexed | 2024-03-12T16:02:05Z |
| publishDate | 2019-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Environmental Research Letters |
| spelling | doaj.art-e23de3f8498147718bf5429f9c0d32762023-08-09T14:37:28ZengIOP PublishingEnvironmental Research Letters1748-93262019-01-0114202500410.1088/1748-9326/aaf306Non-uniform changes in different categories of precipitation intensity across China and the associated large-scale circulationsChiyuan Miao0https://orcid.org/0000-0001-6413-7020Qingyun Duan1Qiaohong Sun2Xiaohui Lei3Hu Li4State Key Laboratory of Earth Surface Processes and Resource Ecology, Faculty of Geographical Science, Beijing Normal University , Beijing 100875, People’s Republic of ChinaState Key Laboratory of Earth Surface Processes and Resource Ecology, Faculty of Geographical Science, Beijing Normal University , Beijing 100875, People’s Republic of ChinaState Key Laboratory of Earth Surface Processes and Resource Ecology, Faculty of Geographical Science, Beijing Normal University , Beijing 100875, People’s Republic of ChinaState Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, People’s Republic of ChinaKey Laboratory of Agricultural Non-point Source Pollution Control, Ministry of Agriculture/Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, People’s Republic of ChinaThis study focuses on changing trends in precipitation across mainland China during the period 1957–2014. We explore the influence of the El Niño–Southern Oscillation (ENSO), the Pacific Decadal Oscillation (PDO), and related large-scale atmospheric circulation variables on the changes in precipitation. The number of wet days showed statistically significant downward trends in North China, Jianghuai, South China, and Southwest of China, but upward trends on the Tibetan Plateau and in Northwest China. However, the number of very wet days increased in Jianghuai, South China and regions in Southwest China, and there was an increase in the spatial variability of a number of rainfall extremes over China. Because the changes in the frequency of wet days and very wet days were non-uniform, an increasing percentage of the total annual precipitation was derived from extreme events over large regions of mainland China. The ENSO and the PDO had a zonal influence on precipitation variability through the modulation of large-scale atmospheric circulation. Both the number of wet days and the frequency of extreme precipitation increased in southern Jianghuai and South China in El Niño years compared with La Niña years. A decrease (increase) in the number of wet days was observed in northern China (southeastern China) during positive PDO-phase years, which was likely a response to the large decrease in Southerly winds.https://doi.org/10.1088/1748-9326/aaf306non-uniform changesprecipitationChinalarge-scale circulation |
| spellingShingle | Chiyuan Miao Qingyun Duan Qiaohong Sun Xiaohui Lei Hu Li Non-uniform changes in different categories of precipitation intensity across China and the associated large-scale circulations Environmental Research Letters non-uniform changes precipitation China large-scale circulation |
| title | Non-uniform changes in different categories of precipitation intensity across China and the associated large-scale circulations |
| title_full | Non-uniform changes in different categories of precipitation intensity across China and the associated large-scale circulations |
| title_fullStr | Non-uniform changes in different categories of precipitation intensity across China and the associated large-scale circulations |
| title_full_unstemmed | Non-uniform changes in different categories of precipitation intensity across China and the associated large-scale circulations |
| title_short | Non-uniform changes in different categories of precipitation intensity across China and the associated large-scale circulations |
| title_sort | non uniform changes in different categories of precipitation intensity across china and the associated large scale circulations |
| topic | non-uniform changes precipitation China large-scale circulation |
| url | https://doi.org/10.1088/1748-9326/aaf306 |
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