柴达木盆地东缘地区风资源变化特征（英文）.pdfVIP

Dec一2012 JournalofResourcesandEcology V0ll_3No．4 J．ResourEco1．20123(4)340-348 DOI：10．5814~．issn1674-764x．2012．04．007 wwwjorae．cn Spatial--temporalVariationinW indResourcesattheEastern EdgeofQaidemBasin，China LIYan’， SHAOXuemei’LIANG Haihe andGUOYatian ， ， 1InstituteofGeographicSciencesandNaturalResourcesResearch，CAS，Beijing100101，China； 2MeteorologicalObservationCenterofCMA，Beijing10086，China； 3UniversityofChineseAcademyofSciences，Beijing100049，China Abstract：Thispaper analyzed time—seriesvariation and spatialdistribution characteristicsofwind reSOHFCesatthe eastern edge of0aidam Basin based on thewind resoUFCesgradientautomatic observation system．W indresourcesarerelatively abundantin thestudy area．the cumulativenumberof hoursofwindspeedbetween3—25m s～ aremorethan6600．equalto275days．exceeding 75％ oftotal annualhours．Advantage windvelocity spectrum wasin the scopeof3-9m s atallgradientsand the peakvalueofwindspeedwas4 6m s ．Differencesinthewindspeedfrequency distribution atother gradientswerenotapparentexceptforthe 10m gradient．Comparedwithotherlayers，theoccurrence frequencyofsmallwindatthelevelof10m washigher．whiletheoccurrencefrequencyofwindspeed between 6 and 12 Ii1s washigheratother layers．Theadvantage wind direction in this areawas northwestand thewind speed differencewasnotobvious．W indspeedandwindpowerdensity gradually increasedwith the increasing height．and differencesamong siteswereapparent．Theaveragewind turbulence intensitywas0．199ateachlayerandtheaverageshearindexwas0．075；turbulenceintensity and shearindex graduallyreduced from over a 10—70m gradient．Turbulence intensityhad the same variation tendency aslocaltemperature，whereby ahigh temperature cOrrespOnded tohigh turbulence and low temperature to low turbulence．Thevariation tendency ofsh