The efficacy of vegetation dynamics simulations in offline land surface models (LSMs) largely depends on the quality and spatial resolution of meteorological forcing data. In this study, the Princeton Global Meteorological Forcing Data (PMFD) and the high spatial resolution and upscaled China Meteorological Forcing Data (CMFD) were used to drive the Simplified Simple Biosphere model version 4/Top-down Representation of Interactive Foliage and Flora Including Dynamics (SSiB4/TRIFFID) and investigate how meteorological forcing datasets with different spatial resolutions affect simulations over the Tibetan Plateau (TP), a region with complex topography and sparse observations. By comparing the monthly Leaf Area Index (LAI) and Gross Primary Production (GPP) against observations, we found that SSiB4/TRIFFID driven by upscaled CMFD improved the performance in simulating the spatial distributions of LAI and GPP over the TP, reducing RMSEs by 24.3％ and 20.5％, respectively. The multi-year averaged GPP decreased from 364.68 gC m?2 yr?1 to241.21 gCm?2 yr?1 with the percentage bias dropping from 50.2％ to –1.7％. When using the high spatial resolution CMFD, the RMSEs of the spatial distributions of LAI and GPP simulations were further reduced by 7.5％ and 9.5％, respectively. This study highlights the importance of more realistic and high-resolution forcing data in simulating vegetation growth and carbon exchange between the atmosphere and biosphere over the TP.

Zhijie KANG;Bo QIU;Zheng XIANG;Ye LIU;Zhiqiang LIN;Weidong GUO

School of Atmospheric Sciences,Nanjing University,Nanjing 210046,China;Pacific Northwest National Laboratory,Washington 99354,USA;Plateau Atmosphere and Environment Key Laboratory of Sichuan Province,School of Atmospheric Sciences,Chengdu University of Information Technology,Chengdu 610225,China

大气科学进展（英文版）

[1]Zhijie KANG;Bo QIU;Zheng XIANG;Ye LIU;Zhiqiang LIN;Weidong GUO-.Improving Simulations of Vegetation Dynamics over the Tibetan Plateau: Role of Atmospheric Forcing Data and Spatial Resolution※)[J].大气科学进展（英文版）,2022(07):1115-1132,1-5

LSMs,PMFD,upscaled,Foliage,SSiB4,TRIFFID,to241

Improving,Simulations,Vegetation,Dynamics,over,Tibetan,Plateau,Role,Atmospheric,Forcing,Data,Spatial,Resolution,efficacy,vegetation,dynamics,simulations,offline,land,surface,models,largely,depends,quality,spatial,meteorological,forcing,this,study,Princeton,Global,Meteorological,China,CMFD,were,used,Simplified,Simple,Biosphere,version,Top,down,Representation,Interactive,Flora,Including,investigate,how,datasets,different,resolutions,affect,TP,region,complex,topography,sparse,observations,By,comparing,monthly,Leaf,Area,Index,LAI,Gross,Primary,Production,GPP,against,found,that,driven,by,improved,performance,simulating,distributions,reducing,RMSEs,respectively,multi,year,averaged,decreased,from,yr,gCm,percentage,bias,dropping,When,using,further,reduced,This,highlights,importance,more,realistic,growth,carbon,exchange,between,atmosphere,biosphere

0.530821