{"title":"青藏高原东南部降水日数的长期变化趋势","authors":"Xinli Zhang, Shun-Jiu Wang","doi":"10.2480/agrmet.d-19-00044","DOIUrl":null,"url":null,"abstract":"In this paper, the spatiotemporal trend variability of precipitation days ( PDs ) in the southeast Tibetan Plateau ( STP ) from 1961 to 2012 is studied on annual and seasonal timescales for the first time. According to the results of the Mann-Kendall ( M-K ) test, the annual and seasonal area-averaged PDs shows a non-significant tendency except for spring PDs, and the spring PDs shows a significantly increased trend at 95 % confidence level during this period. The increase is 6.85 days per 100 years in annual PDs. The maximal increase occurs in spring, which is 7.13 days per 100 years. On the other hand, the PDs and their tendencies have notable spatial distribution variations over the STP. The PDs have some relationship with altitude, but their tendencies are unrelated to altitude in the STP. This study further finds that the Nujiang River is a dividing line for the PDs, and latitude 30 ° N is such a line for the PDs tendency. The results revealed the local differences of the PDs over the Tibetan Plateau ( TP ) , which is beneficial to understand the variations in precipitation patterns in the STP and gain insights into the change features of the TP under global changes.","PeriodicalId":56074,"journal":{"name":"Journal of Agricultural Meteorology","volume":null,"pages":null},"PeriodicalIF":1.4000,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Long-term trend of precipitation days for southeast Tibetan Plateau, China\",\"authors\":\"Xinli Zhang, Shun-Jiu Wang\",\"doi\":\"10.2480/agrmet.d-19-00044\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"In this paper, the spatiotemporal trend variability of precipitation days ( PDs ) in the southeast Tibetan Plateau ( STP ) from 1961 to 2012 is studied on annual and seasonal timescales for the first time. According to the results of the Mann-Kendall ( M-K ) test, the annual and seasonal area-averaged PDs shows a non-significant tendency except for spring PDs, and the spring PDs shows a significantly increased trend at 95 % confidence level during this period. The increase is 6.85 days per 100 years in annual PDs. The maximal increase occurs in spring, which is 7.13 days per 100 years. On the other hand, the PDs and their tendencies have notable spatial distribution variations over the STP. The PDs have some relationship with altitude, but their tendencies are unrelated to altitude in the STP. This study further finds that the Nujiang River is a dividing line for the PDs, and latitude 30 ° N is such a line for the PDs tendency. The results revealed the local differences of the PDs over the Tibetan Plateau ( TP ) , which is beneficial to understand the variations in precipitation patterns in the STP and gain insights into the change features of the TP under global changes.\",\"PeriodicalId\":56074,\"journal\":{\"name\":\"Journal of Agricultural Meteorology\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":1.4000,\"publicationDate\":\"2020-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Agricultural Meteorology\",\"FirstCategoryId\":\"97\",\"ListUrlMain\":\"https://doi.org/10.2480/agrmet.d-19-00044\",\"RegionNum\":4,\"RegionCategory\":\"农林科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"AGRICULTURE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Agricultural Meteorology","FirstCategoryId":"97","ListUrlMain":"https://doi.org/10.2480/agrmet.d-19-00044","RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"AGRICULTURE, MULTIDISCIPLINARY","Score":null,"Total":0}
Long-term trend of precipitation days for southeast Tibetan Plateau, China
In this paper, the spatiotemporal trend variability of precipitation days ( PDs ) in the southeast Tibetan Plateau ( STP ) from 1961 to 2012 is studied on annual and seasonal timescales for the first time. According to the results of the Mann-Kendall ( M-K ) test, the annual and seasonal area-averaged PDs shows a non-significant tendency except for spring PDs, and the spring PDs shows a significantly increased trend at 95 % confidence level during this period. The increase is 6.85 days per 100 years in annual PDs. The maximal increase occurs in spring, which is 7.13 days per 100 years. On the other hand, the PDs and their tendencies have notable spatial distribution variations over the STP. The PDs have some relationship with altitude, but their tendencies are unrelated to altitude in the STP. This study further finds that the Nujiang River is a dividing line for the PDs, and latitude 30 ° N is such a line for the PDs tendency. The results revealed the local differences of the PDs over the Tibetan Plateau ( TP ) , which is beneficial to understand the variations in precipitation patterns in the STP and gain insights into the change features of the TP under global changes.
期刊介绍:
For over 70 years, the Journal of Agricultural Meteorology has published original papers and review articles on the science of physical and biological processes in natural and managed ecosystems. Published topics include, but are not limited to, weather disasters, local climate, micrometeorology, climate change, soil environment, plant phenology, plant response to environmental change, crop growth and yield prediction, instrumentation, and environmental control across a wide range of managed ecosystems, from open fields to greenhouses and plant factories.