贵阳市2003—2020年NDVI时空动态变化研究

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中图分类号：TP391 文献标识码：A 文章编号：2096-4706（2025）16-0184-05

Abstract： The Normalized Diference Vegetation Index （NDVI） can quantitatively reflect the growth status and coverage degreeofsurface vegetation.From2O03to 2020，theurbanization processof Guiyangand thepolicyofreturning farmlandto forestwereadvancedsimultaneouslyherefore，itisofgeatsignificance tounderstandtheinterannualandspatial-temporal changesofvegetationcoveragedegreeinGuiyang inrecent years.Inthis paper，theannualaverageNDVIdatasynthesizedfrom theNDVIdata withaspatialresolutionof250meters providedbythe MOD13Q1datasetisadopted.TheinterannualNDVItrend changesandtheirsignificanceinGuiyang from2O03to2O20aredetectedbytheSen-MKmethod.Theresearchresultsshowthat theNDVI inGuiyangshowsanoverallupwardtrendfrom2003 to2020.ItsNDVIvaluefluctuatesbetween0.40and0.55，with an average growth rateof0.003 peryear.The averageannual NDVIin Guiyang reaches the maximum value of0.55 n 2016. Theaverage annual NDVIreaches its minimum valueof 0.40 in 20o5.Meanwhile，theNDVIvalues in theurban areas and their vicinityarerelativelylowandshowslightdegradation.

Keywords：Normalized Difference Vegetation Index （NDVI）; Guiyang; spatial-temporalchange; Sen-MK method

0 引言

植被在地表的物质与能量交换、碳收支、水分循环、温室气体减排以及气候调节等方面扮演着关键角色。（剩余6782字）