Decadal variations in near-surface wind speed across the Northern Hemisphere on a centennial timescale and their possible causes  

作　　者：Lin-Wei LI Jin-Lin ZHA Ting CHUNA Jian WU De-Ming ZHAO Wen-Xuan FAN Yan-Jun LYU Hui-Ping JIANG 

机构地区：[1]Key Laboratory of Atmospheric Environment and Processes in the Boundary Layer Over the Low-Latitude Plateau Region,Department of Atmospheric Science,Yunnan University,Kunming 650091,China [2]Key Laboratory of Regional Climate and Environment for Temperate East Asia,Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,China [3]Center for Energy&Environmental Policy Research,Beijing Institute of Technology,Beijing 100081,China [4]Key Laboratory of Regional Sustainable Development Modeling,Institute of Geographic Sciences and Natural Resources Research,Chinese Academy of Sciences,Beijing 100101,China [5]International Research Center of Big Data for Sustainable Development Goals,Beijing 100094,China

出　　处：《Advances in Climate Change Research》2024年第6期1003-1012,共10页气候变化研究进展(英文版)

基　　金：supported by the National Key Research and Development Program of China(2023YFF0805504);the National Natural Science Foundation of China(42475040,42375174,42361134582);the Yunnan Fundamental Research Projects(202401AW070008,202301AT070199).

摘　　要：The reduction in near-surface wind speed(NSWS),followed by its recent recovery,could be a feature of decadal variations.However,existing studies mainly analyse the characteristics and causes of NSWS changes on regional scales and over short periods.The decadal variations and underlying causes of global NSWS changes over long timescales remain underexplored.In this study,we investigated the characteristics of NSWS changes in the Northern Hemisphere(NH)on a centennial scale(1900–2010)and identify the potential causes of decadal variations by using an information flow technique.The results indicate that NSWS in the NH experienced a remarkable decadal variation,increasing during 1900–1945 and 1970–1980 and decreasing during 1945–1970 and 1980–2010.Furthermore,regional differences in the distribution features and decadal variations of NSWS were observed.Asia and North America showed the highest data overlap compared to other regions,reaching 59.4%.The longest period of decadal variation in NSWS was found in North America(14 years),followed by Europe(11 years),with Asia showing the smallest period(10 years).When determining the effects of large-scale ocean–atmosphere circulation fields or internal climate models on NSWS changes,prioritising causality between the two variables and the study period is essential,rather than relying solely on simple correlation analysis.According to the information flow technique,the decadal variations in NSWS over North America during 1950–2010 were linked with the Western Hemisphere Warm Pool,whereas the North Atlantic Oscillation influenced those in Europe.The Tropical Northern Atlantic was the driver over Asia.This study offers a scientific foundation for understanding NSWS characteristics on a centennial timescale and the primary causes of decadal variations in NSWS across the NH.

关 键 词：Near-surface wind speed Centennial timescale Information flow Regional difference Northern Hemisphere 

分 类 号：P467[天文地球—大气科学及气象学]