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1、第16卷第1期气候与环境研究Vol116No112011年1月ClimaticandEnvironmentalResearchJan.2011俞淼,陈海山,孙照渤.2011.动态植被模型模拟的植被季节变化及其评估[J].气候与环境研究,16(1):47-59.YuMiao,ChenHais-han,SunZhaobo.2011.Seasonalcycleofterrestrialvegetationsimulatedbyadynamicvegetationmodelanditsassessment[J].ClimaticandEnvironmentalResearch(inChine
2、se),16(1):47-59.动态植被模型模拟的植被季节变化及其评估俞淼陈海山孙照渤南京信息工程大学气象灾害省部共建教育部重点实验室,南京210044摘要利用MODIS卫星观测资料,对一个考虑了生态系统碳氮循环过程的动态植被模型ICM的模拟性能进行了评估。重点对反映植被动力学的关键参数)))叶面积指数(LAI)的模拟结果与观测进行了对比分析,评估了ICM对LAI季节变化特征的模拟能力。结果表明,ICM基本能够模拟出植被的季节变化特征。总体而言,模拟值在低纬度和高纬度地区大于观测值,中纬度地区小于观测值;模拟的植被生长常落后于观测,造成了模拟偏小值的出现与植被的生长季节相对应;模拟没
3、有表现出热带常绿阔叶林和农作物LAI季节变化的双峰结构;模式对草地的模拟总体上优于林地。结果可为进一步改进动态植被模式的参数化方案和优化模型参数提供一定参考。关键词陆面过程模拟动态植被季节变化模式评估文章编号1006-9585(2011)01-0047-13中图分类号P437文献标识码ASeasonalCycleofTerrestrialVegetationSimulatedbyaDynamicVegetationModelandItsAssessmentYUMiao,CHENHaishan,andSUNZhaoboKeyLaboratoryofMeteorologicalDisas
4、terofMinistryofEducation,NanjingUniversityofInformationScienceandTechnology,Nanjing210044AbstractBasedontheMODISobservations,theperformanceofInteractiveCanopyModel(ICM),adynamicvegetationmodelincludingthecarbonandnitrogencyclesoftheterrestrialecosystem,hasbeenassessed.TheLeafAreaIndex(LAI),akey
5、parameterwithseasonalvariationinvegetationdynamics,issimulatedbyICMandcom-paredwiththeMODISdata.TheresultsshowthatICMcansimulatethemaincharacteristicsoftheseasonalLAIfluctuations.Comparedtotheobservation,LAIisoverestimatedinhighandlowlatitudes,butunderestimatedinmiddlelatitudesbythemodel.Theund
6、erestimationoftheLAIinmiddlelatitudesisfollowedbythevegetationsproutforthereasonthatthemodeledgrowthisalwaysslowerthantheobservedone.Thebimodaldistributionsforthetropicalevergreenbroadleaftreesandcropshavenotbeenwellcaptured.Inaddition,thesimulatedresultsforthegrasslandaremorereasonablethanothe
7、rPlantFunctionTypes(PFTs).TheresultswillprovideimportantcluesfortheparameterizationimprovementandparametersoptimizationoftheICM.Keywordslandsurfacemodeling,dynamicvegetation,seasonalcycle,modelassessment收稿日期2009-04-30收到,2010-10-08
