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3(,100101),,,;,,,,,1,,,,400500mm,50100mm,,,,,,,,,;:65E2mail:zhengd@263.net3(:G1998040800)2001-07-26,2001-09-02216200111QUATERNARYSCIENCESVol.21,No.6November,2001,,,[1],H.vonWissmann[2]C.Troll,,[3],P,,12,,,,2040mm,47005200m,36,,,,(Ceratoidescompacta),,1%5%,,5300m,,,,[4],,,,,,[5]2,,,,,[6],,,,(35km),,[7],,,3768,2101106[8],,,,29N,,5846:1100m,20N800m,;(Tsugadumosa)(Abiesspp.)(Kobresiaspp.),,,600800m[9],,,,,,,,,[10],,2830N,(),,,[9],,,,,,10,,4,,,,,,,,1000m[9,10]3,,[11],,,,,,,6842001,,,,,,,,,,,,,,,[9,11],,;10001200m(),,4400m()4600m(),(Picealikiangensisvar.balfouriana)(Sabinatibetica)(3031N),,16002200m,4,;;,,,;,,,,,[12],[13],,,[14],,,,7846:,,PP,,,,[15,16],,[16],,,P,[17],,,,,45004800m,,;35004200m,,,25003500(4000)m,[18,19],,:,,,10,28[19,20]1..,1993,7(3P4):4264312WissmannvH.StufenundGurtelderVegetationunddesKlimasinHochasienundSeinenRandgebieten.Erdkunde,1960P1961,(Bd.XV):1944,(XIV):2492723TrollC.TheupperlimitofaridityandthearidcoreofHighAsia.In:TrollCed.GeoecologyoftheHigh2MountainRegionsofEurasia(Erdwiss.Forschg.IV).Wiesbaden:FranzSteinerVerlagGMBH,1972.2372434,..,1990,9(3):33445,..:.(10).:,1999.1381526,,..(B),1987,8:8939027..:,.(6).:,1996.1121348,..:,1992.12399,,..:.(6).:8842001,1996.26232310,..:.(2).:,1992.203011,..,1990,9(2):11012,,..,1980,(11):1090109813..,1985,3(4):29129814..:.(6).:,1989.779415..:.(21).:,1989.102016..:,.(3).:,1992.709217,,..:.(11).:,1999.15318618..:.(21).:,1989.212819..(D),1996,26(4):33634120ZhengDu.Threedimensionaldifferentiationofnaturalzonation.In:ZhengDuetal.eds.MountainGeoecologyandSustainableDevelopmentoftheTibetanPlateau(TheGeoJournalLibrary,57).Dordrecht:KluwerAcademicPublishers,2000.4769QINGHAI-XIZANGPLATEAUANDITSEFFECTSONREGIONALDIFFERENTIATIONOFPHYSICALENVIRONMENTSINWESTCHINAZhengDu(InstituteofGeographicalSciencesandNaturalResourcesResearch,CAS,Beijing100101)AbstractTheupliftingoftheQinghai-XizangPlateauhasexertedgreatinfluenceonregionaldifferentiationofphysicalenvironmentsinWestChina.IthasstrengtheneddesiccationinNorthwestChinasincetheTertiary,bringingaboutthecoexistingofmountainwetislandsanddesertoasesaswellasanaridcoreinAsia.Asamoisturecorridor,theYarlungZangborivervalleyhasplayedasignificantroleinSoutheastTibet.AnumberofuniquedryvalleysoccurextensivelyintheHengduanMts.ofsouthwestChina.ThedistributionpatternofvariousaltitudinalbelttypesrevealsthezonaldifferentiationofnaturallandscapesoftheQinghai-XizangPlateau.Underthecombinedactionofitstopographicframeworkandatmosphericcirculation,theQinghai-XizangPlateaudisplaysinsuccessionthefollowingspatialdifferentiationofphysicalenvironmentsfromSEtoNW:montaneforest,alpinemeadow,alpinePmontanesteppeandalpinePmontanedesert.Accordingtotemperature,moistureandlandformstheQinghai-XizangPlateaucanbedividedinto2temperaturebelts,10naturalzonesand28physicaldistricts.KeywordsWestChina,Qinghai-XizangPlateau,physicalenvironments,regionaldifferentiation9846: