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Variability and trends of near-surface wind speed over the Tibetan Plateau:The role played by the westerly and Asian monsoon

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Advances in Climate Change Research 2024年第3期15卷 525-536页

作者： Gang-Feng ZHANG cesar azorin-mol.na Deliang CHEN Tim RMCVICAR Jose AGUIJARRO Kai-Qiang DENG Lorenzo MINOLA Jaeyeon LEE Seok-Woo SON Heng MA Pei-Jun SHI State Key Laboratory of Earth Surface Processes and Resource Ecology Beijing Normal UniversityBeijing 100875China Engineering Center of Desertification and Blown-Sand Control of Ministry of Education Faculty of Geographical ScienceBeijing Normal UniversityBeijing 100875China Key Laboratory of Environmental Change and natural Disaster of Ministry of Education Beijing Normal UniversityBeijing 100875China Centro de Investigaciones Sobre Desertificaci'on Consejo Superior de Investigaciones Cientı'ficas(CIDECSIC-UV-Generalitat alenciana)ClimateAtmosphere and Ocean Laboratory(Climatoc-Lab)Moncada 46113Spain Regional Climate Group Department of Earth SciencesUniversity of GothenburgGothenburg 40530Sweden CSIRO Environment CanberraACT 2600Australia Australian Research Council Centre of Excellence for Climate Extremes CanberraACT 2600Australia State Meteorological Agency Balearic Islands OfficePalma de Mallorca 07015Spain School of Atmospheric Sciences Sun Yat-sen UniversityZhuhai 519082China Interuniversity Department of Regional and Urban Studies and Planning(DIST) Politecnico and University of TurinTurin 10125Italy School of Earth and Environmental Sciences Seoul National UniversitySeoul 08826South Korea Atmospheric and Oceanic Sciences Program Princeton UniversityPrinceton NJ 08544USA Geophysical Fluid Dynamics Laboratory NOAAPrinceton NJ 08544USA

Near-surface wind speed exerts profound impacts on many environmental issues,while the long-term(≥60 years)trend and multidecadal variability in the wind speed and its underlying causes in global high-elevation and mountainous areas(e.g.,Tibetan Plateau)remain largely ***,by examining homogenized wind speed data from 104 meteorological stations over the Tibetan Plateau for 1961-2020 and ERA5 reanalysis datasets,we investigated the variability and long-term trend in the near-surface wind speed and revealed the role played by the westerly and Asian *** results show that the homogenized annual wind speed displays a decreasing trend(-0.091 m s^(−1)per decade,pnalysis unveiled a more important role of westerly and East Asian winter monsoon in modulating near-surface wind changes over the Tibetan *** potential physical processes associated with westerly and Asian monsoon changes are in concordance with wind speed change,in terms of overall weakened horizontal air flow(i.e.,geostrophic wind speed),declined vertical thermal and dynamic momentum transfer(i.e.,atmospheric stratification thermal instability and vertical wind shear),and varied Tibetan Plateau *** indicates that to varying degrees these processes may have contributed to the changes in near-surface wind speed over the Tibetan *** study has implications for wind power production and soil wind erosion prevention in the Tibetan Plateau.

关键词： Tibetan Plateau Wind speed Decadal change Atmospheric circulation Physical processes

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Shifting of summertime weather extremes in Western Europe during 2012-2020

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Advances in Climate Change Research 2022年第2期13卷 218-227页

作者： Kai-Qiang DENG cesar azorin-mol.na Song YANG Chun-Di HU Gang-Feng ZHANG Lorenzo MINOLA Sergio VICENTE-SERRANO Deliang CHEN School of Atmospheric Sciences and Guangdong Province Key Laboratory for Climate Change and natural Disaster Studies Sun Yat-sen UniversityZhuhai 519082China Regional Climate Group Department of Earth SciencesUniversity of GothenburgGothenburg 40530Sweden Centro de Investigaciones Sobre Desertificación Consejo Superior de Investigaciones Científicas(CIDE-CSIC)Moncada 46113Spain Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai 519082China State Key Laboratory of Earth Surface Processes and Resource Ecology Beijing Normal UniversityBeijing 100875China Academy of Disaster Reduction and Emergency Management Ministry of Emergency Management and Ministry of EducationBeijing Normal UniversityBeijing 100875China Instituto Pirenaico de Ecología Consejo Superior de Investigaciones Científicas(IPE–CSIC)Zaragoza 50059Spain

Over the past decades,droughts and heatwaves frequently appeared in Western Europe(45°-65°N,10°W-20°E)during boreal summer,causing huge impacts on human society and *** these extremes are projected to increase in both frequency and intensity under a warming climate,our knowledge of their interdecadal variations and causes is relatively *** we show that the droughts and heatwaves in Western Europe have shifted in their trends in the last decade:for 1979-2012,wind speed and precipitation have both strengthened in Western Europe;for 2012-2020,however,Western Europe have experienced declined wind speed,decreased precipitation,and higher air temperature,leading to more frequent droughts and heatwaves *** changes in the WE climate and extremes are related to the variations of the North Atlantic westerly jet *** 1979-2012(2012-2020),the westerly jet stream shifted equatorward(poleward),which enhanced(reduced)transportation of water vapor fluxes from the North Atlantic Ocean to the European land areas,resulting in wetter(drier)surface in Western *** analysis suggests that phase changes in the Pacific Decadal Oscillation could have played a key role in regulating the position of the jet stream,providing important implications for decadal predictions of the Western Europe summertime climate and weather extremes.

关键词： Extremes Western Europe Westerly jet stream Pacific decadal oscillation

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Effects of Northern Hemisphere Annular Mode on terrestrial near-surface wind speed over eastern China from 1979 to 2017

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Advances in Climate Change Research 2022年第6期13卷 875-883页

作者： Jin-Lin ZHA Cheng SHEN Jian WU De-Ming ZHAO Wen-Xuan FAN Hui-Ping JIANG cesar azorin-mol.na Deliang CHEN Key Laboratory of Atmospheric Environment and Processes in the Boundary Layer Over the Low-Latitude Plateau Region Department of Atmospheric ScienceYunnan UniversityKunming 650091China Key Laboratory of Regional Climate and Environment for Temperate East Asia Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China Regional Climate Group Department of Earth SciencesUniversity of GothenburgGothenburg 004631Sweden International Research Center of Big Data for Sustainable Development Goals(CBAS) Beijing 100094China Key Laboratory of Digital Earth Science Aerospace Information Research Institute(AIR)Chinese Academy of SciencesBeijing 100094China Centro de Investigaciones Sobre Desertificación Consejo Superior de Investigaciones Científicas(CIDE-CSIC)Moncada Valencia 46008Spain

Large-scale ocean‒atmosphere circulations(LOACs)have a pronounced effect on the near-surface wind speed(NSWS).In this study,we discussed the contributions of zonal and meridional flows to NSWS changes and identify the possible association between the Northern Hemisphere Annular Mode(naM)and the NSWS changes over eastern China from 1979 to *** show that the reduction in NSWS over eastern China was mainly dominated by the weakening of the zonal wind *** has a considerable effect on the NSWS over eastern *** the naM exhibits positive phases,the zonal-mean westerly weakens at low-to-mid-latitudes(10°-40°N).Meanwhile,descending flows prevail near 40°N,and ascending flows persist near 65°N in the *** the lower troposphere,there are northerly anomalies at low-to-mid-latitudes and southerly anomalies at mid-to-high latitudes(40°-70°N).The anomalous meridional flows transport heat from low to high latitudes and weaken the north‒south air temperature *** decreased air temperature gradient over East Asia reduces the pressure gradient near the surface,decreasing NSWS in eastern *** variations could dominate(32.0±15.8)%of the changes in the annual mean ***,the contribution of naM to the interannual changes of the zonal component in NSWS could reach(45.0±12.9)%.

关键词： Near-surface wind speed Temperature gradient Pressure gradient Northern Hemisphere Annular Mode Large-scale ocean-atmosphere circulations

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人工智能重构全球风速栅格数据集

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Science Bulletin 2022年第20期67卷 2060-2063,M0003页

作者：周俐宏刘浩锋江鑫 Alan D.Ziegler cesar azorin-mol.na 刘江曾振中 School of Environmental Science and Engineering Southern University of Science and TechnologyShenzhen 518055China Department of Computer Science and Engineering Southern University of Science and TechnologyShenzhen 518055China Faculty of Fisheries and Aquatic Resources Maejo UniversityChiang Mai 50290Thailand Centro de Investigaciones sobre Desertificación Consejo Superior de Investigaciones Científicas(CIDECSIC-UV-Generalitat Valenciana)ClimateAtmosphere and Ocean Laboratory(Climatoc-Lab)MoncadaValencia 46113Spain

风速数据被广泛用于科学、管理和政策领域,例如评估可再生能源潜力、探索气候变化/变异性等.而如何获得准确而连续的风速数据仍是一个棘手的问题.本文探究了部分卷积神经网络在重构风速数据上的表现,证实了该算法在修复具有大量缺失值(8... 详细信息

风速数据被广泛用于科学、管理和政策领域,例如评估可再生能源潜力、探索气候变化/变异性等.而如何获得准确而连续的风速数据仍是一个棘手的问题.本文探究了部分卷积神经网络在重构风速数据上的表现,证实了该算法在修复具有大量缺失值(88%)的数据集上的可行性;随后基于该算法,开发了一套全球10米月平均风速产品—GGWSPCNN(1.25°×2.5°;1973~2020).该产品实现了风速数据在时空上的连续性的同时也包含了观测到的风速趋势信息.本研究还基于该产品分析了1973~2020年全球陆地风速的变化情况.结果显示,2010年以前北半球和非洲风速的下降主导了全球风速的下降,而2010年后全球大多数地区(尤其是亚洲、欧洲和非洲)的风速回升共同促成了全球风速的上升.

关键词：卷积神经网络人工智能缺失值可再生能源平均风速 CNN 气候变化连续性

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