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

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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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 unknown.Here,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 monsoon.The results show that the homogenized annual wind speed displays a decreasing trend(-0.091 m s-1 per decade,p＜0.05),with the strongest in spring(-0.131 m s-1 per decade,p＜0.05),and the weakest in autumn(-0.071 m s-1 per decade,p＜0.05).There is a distinct multidecadal variability of wind speed,which manifested in an prominent increase in 1961-1970,a sustained decrease in 1970-2002,and a consistent increase in 2002-2020.The observed decadal variations are likely linked to large-scale atmospheric circulation,and the correlation analysis unveiled a more important role of westerly and East Asian winter monsoon in modulating near-surface wind changes over the Tibetan Plateau.The 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 vortices.This indicates that to varying degrees these processes may have contributed to the changes in near-surface wind speed over the Tibetan Plateau.This study has implications for wind power production and soil wind erosion prevention in the Tibetan Plateau.

Tibetan PlateauWind speedDecadal changeAtmospheric circulationPhysical processes

Gang-Feng ZHANG、Cesar AZORIN-MOLINA、Deliang CHEN、Tim R.MCVICAR、Jose A.GUIJARRO、Kai-Qiang DENG、Lorenzo MINOLA、Jaeyeon LEE、Seok-Woo SON、Heng MA、Pei-Jun SHI

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State Key Laboratory of Earth Surface Processes and Resource Ecology,Beijing Normal University,Beijing 100875,China

Engineering Center of Desertification and Blown-Sand Control of Ministry of Education,Faculty of Geographical Science,Beijing Normal University,Beijing 100875,China

Key Laboratory of Environmental Change and Natural Disaster of Ministry of Education,Beijing Normal University,Beijing 100875,China

Centro de Investigaciones Sobre Desertificación,Consejo Superior de Investigaciones Científicas(CIDE,CSIC-UV-Generalitat Valenciana),Climate,Atmosphere and Ocean Laboratory(Climatoc-Lab),Moncada 46113,Spain

Regional Climate Group,Department of Earth Sciences,University of Gothenburg,Gothenburg 40530,Sweden

CSIRO Environment,Canberra,ACT 2600,Australia

Australian Research Council Centre of Excellence for Climate Extremes,Canberra,ACT 2600,Australia

State Meteorological Agency,Balearic Islands Office,Palma de Mallorca 07015,Spain

School of Atmospheric Sciences,Sun Yat-sen University,Zhuhai 519082,China

Interuniversity Department of Regional and Urban Studies and Planning(DIST),Politecnico and University of Turin,Turin 10125,Italy

School of Earth and Environmental Sciences,Seoul National University Seoul 08826,South Korea

Atmospheric and Oceanic Sciences Program,Princeton University Princeton NJ 08544,USA

Geophysical Fluid Dynamics Laboratory,NOAA,Princeton NJ 08544,USA

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National Natural Science Foundation of ChinaSecond Tibetan Plateau Scientific Expedition and Research ProgramSecond Tibetan Plateau Scientific Expedition and Research ProgramFundamental Research Funds for the Central Universities of ChinaOpening Foundation of Engineering Center of Desertification and Blown-Sand Control of Ministry of Education at Beijing Normal UnIBER-STILLING project,funded by the Spanish Ministry of Science.L.M.was founded by an International Postdoc grant from the S'Development of Advanced Science and Technology for Marine Environmental Impact Assessment'of Korea Institute of Marine Science

42101027STEP2019QZKK06062022NTST182023-B-22021-0044420210427

2024

10.1016/j.accre.2024.04.007

气候变化研究进展(英文版)
国家气候中心

气候变化研究进展(英文版)

影响因子：0.806
ISSN：1674-9278
年,卷(期)：2024.15(3)