{"title":"2022年青藏高原早春极端降雪量分析","authors":"Chuying Deng, Xiuzhen Li, Yuan Zhao","doi":"10.1002/joc.8835","DOIUrl":null,"url":null,"abstract":"<div>\n \n <p>In early spring (March–April) of 2022, the snow depth on the Tibetan Plateau (TP) witnessed a historic decrement, breaking its records in the past few decades. The snow decrement was marked by an early beginning, a rapid pace of decline and extensive spatial coverage, which may play an important role in triggering the extreme events in the upcoming summer. This study investigated the underlying causes of this extreme snow decrement from the perspectives of local air–land interaction and crucial atmospheric circulations modulation. The extreme snow decrement can be attributed to a combination of factors, including an initial surplus in snow depth, anomalously high solar radiation influx, reduced precipitation and warm surface air temperature. Amongst these, the latter two factors were the key contributors leading to weakened snowfall (lowest) and increased snowmelt. Analysis of large-scale atmospheric circulation reveals the influence of a barotropically abnormal anticyclone (strongest) over the TP. The peripheral flow of this anticyclone suppressed the moisture supply, and the associated sinking motion (second strongest) enhanced the adiabatic heating (second highest). Further investigation suggests that this peculiar anticyclone might be linked to a robust positive North Atlantic Oscillation (NAO) signal. In conjunction with other favourable forcing and atmospheric conditions, the NAO triggered a wave train that propagated to the TP and contributed to the formation of the exceptional anticyclone.</p>\n </div>","PeriodicalId":13779,"journal":{"name":"International Journal of Climatology","volume":"45 8","pages":""},"PeriodicalIF":3.5000,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Extreme Snow Decrement on the Tibetan Plateau in Early Spring of 2022\",\"authors\":\"Chuying Deng, Xiuzhen Li, Yuan Zhao\",\"doi\":\"10.1002/joc.8835\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div>\\n \\n <p>In early spring (March–April) of 2022, the snow depth on the Tibetan Plateau (TP) witnessed a historic decrement, breaking its records in the past few decades. The snow decrement was marked by an early beginning, a rapid pace of decline and extensive spatial coverage, which may play an important role in triggering the extreme events in the upcoming summer. This study investigated the underlying causes of this extreme snow decrement from the perspectives of local air–land interaction and crucial atmospheric circulations modulation. The extreme snow decrement can be attributed to a combination of factors, including an initial surplus in snow depth, anomalously high solar radiation influx, reduced precipitation and warm surface air temperature. Amongst these, the latter two factors were the key contributors leading to weakened snowfall (lowest) and increased snowmelt. Analysis of large-scale atmospheric circulation reveals the influence of a barotropically abnormal anticyclone (strongest) over the TP. The peripheral flow of this anticyclone suppressed the moisture supply, and the associated sinking motion (second strongest) enhanced the adiabatic heating (second highest). Further investigation suggests that this peculiar anticyclone might be linked to a robust positive North Atlantic Oscillation (NAO) signal. In conjunction with other favourable forcing and atmospheric conditions, the NAO triggered a wave train that propagated to the TP and contributed to the formation of the exceptional anticyclone.</p>\\n </div>\",\"PeriodicalId\":13779,\"journal\":{\"name\":\"International Journal of Climatology\",\"volume\":\"45 8\",\"pages\":\"\"},\"PeriodicalIF\":3.5000,\"publicationDate\":\"2025-03-24\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"International Journal of Climatology\",\"FirstCategoryId\":\"89\",\"ListUrlMain\":\"https://onlinelibrary.wiley.com/doi/10.1002/joc.8835\",\"RegionNum\":3,\"RegionCategory\":\"地球科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"METEOROLOGY & ATMOSPHERIC SCIENCES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Climatology","FirstCategoryId":"89","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/joc.8835","RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"METEOROLOGY & ATMOSPHERIC SCIENCES","Score":null,"Total":0}
Extreme Snow Decrement on the Tibetan Plateau in Early Spring of 2022
In early spring (March–April) of 2022, the snow depth on the Tibetan Plateau (TP) witnessed a historic decrement, breaking its records in the past few decades. The snow decrement was marked by an early beginning, a rapid pace of decline and extensive spatial coverage, which may play an important role in triggering the extreme events in the upcoming summer. This study investigated the underlying causes of this extreme snow decrement from the perspectives of local air–land interaction and crucial atmospheric circulations modulation. The extreme snow decrement can be attributed to a combination of factors, including an initial surplus in snow depth, anomalously high solar radiation influx, reduced precipitation and warm surface air temperature. Amongst these, the latter two factors were the key contributors leading to weakened snowfall (lowest) and increased snowmelt. Analysis of large-scale atmospheric circulation reveals the influence of a barotropically abnormal anticyclone (strongest) over the TP. The peripheral flow of this anticyclone suppressed the moisture supply, and the associated sinking motion (second strongest) enhanced the adiabatic heating (second highest). Further investigation suggests that this peculiar anticyclone might be linked to a robust positive North Atlantic Oscillation (NAO) signal. In conjunction with other favourable forcing and atmospheric conditions, the NAO triggered a wave train that propagated to the TP and contributed to the formation of the exceptional anticyclone.
期刊介绍:
The International Journal of Climatology aims to span the well established but rapidly growing field of climatology, through the publication of research papers, short communications, major reviews of progress and reviews of new books and reports in the area of climate science. The Journal’s main role is to stimulate and report research in climatology, from the expansive fields of the atmospheric, biophysical, engineering and social sciences. Coverage includes: Climate system science; Local to global scale climate observations and modelling; Seasonal to interannual climate prediction; Climatic variability and climate change; Synoptic, dynamic and urban climatology, hydroclimatology, human bioclimatology, ecoclimatology, dendroclimatology, palaeoclimatology, marine climatology and atmosphere-ocean interactions; Application of climatological knowledge to environmental assessment and management and economic production; Climate and society interactions