本文選題：NDVI　切入點(diǎn)：遙感　出處：《國(guó)土資源遙感》2017年02期

【摘要】：為研究我國(guó)近10 a月平均NDVI空間分布特征,使用2005 2014年MOD/MYD13C2植被指數(shù)產(chǎn)品得到全國(guó)多年分月NDVI;在考慮不同月份NDVI高、中、低值區(qū)面積變化的同時(shí),結(jié)合DEM數(shù)據(jù),分析植被覆蓋隨季節(jié)變化的規(guī)律和NDVI隨坡向、海拔的變化規(guī)律。結(jié)果表明:NDVI低值段[-0.25,0.15)面積冬季高、夏季低,代表裸土、荒地和部分水體的特征;中值段[0.15,0.55)面積呈"雙峰雙谷"分布,春、秋季高于冬、夏季,體現(xiàn)植被覆蓋下混合地物的特征;高值段[0.55,0.95]面積夏季高、冬季低,反映了植被覆蓋隨季節(jié)變化的規(guī)律。NDVI隨坡向變化呈"雙峰雙谷"分布,東南、西北坡高于西南、東北坡。NDVI隨海拔升高出現(xiàn)3個(gè)遞減帶(250~1 250 m,2 500~3 000 m和3 750~6 000 m)和2個(gè)遞增帶(1 250~2 500 m和3 000~3 750 m)。受我國(guó)氣候及地理、地形等要素影響,NDVI的水平和垂直向空間分異顯著。此規(guī)律可為陸面過程研究提供參考。
[Abstract]:In order to study the spatial distribution characteristics of average NDVI in recent 10 years in China, the MOD/MYD13C2 vegetation index product of 2005 ~ 2014 was used to obtain the multimonthly NDVI in China, and the area variation of high, middle and low NDVI in different months was taken into account, and the DEM data were combined. The seasonal variation of vegetation cover and the variation of NDVI with slope direction and elevation were analyzed. The results showed that the area of low value section of NDVI was high in winter and low in summer, representing the characteristics of bare soil, wasteland and some water bodies. The area of the median section [0.15 ~ 0.55] is "double peak and double valley", which is higher in spring and autumn than in winter and summer, which reflects the characteristics of mixed ground objects under vegetation cover, and the area of high value section [0.55 ~ 0.95] is high in summer and low in winter. The distribution of NDVI is "double peak and double valley" with slope direction, the southeast and northwest slope is higher than that of southwest, the distribution of vegetation cover with seasonal variation is "double peak and double valley", and the northwest slope is higher than that of southwest. In the northeast slope, NDVI has three decreasing zones (2500m ~ (2500m) and 3 750m ~ (6 000 m)) and two increasing zones (1 250m ~ (2 500 m) and 3 000 ~ (750m) m) with the elevation increasing, which is influenced by the climate and geography of our country. The horizontal and vertical spatial differentiation of NDVI is significantly influenced by topography, which can be used as a reference for the study of land surface processes.
【作者單位】： 安徽省公共氣象服務(wù)中心;南京信息工程大學(xué)應(yīng)用氣象學(xué)院;南京信息工程大學(xué)地理與遙感學(xué)院地理信息系;浙江省湖州市氣象局;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目“復(fù)雜地形下月平均氣溫分布式模型研究”(編號(hào):41175077)資助
【分類號(hào)】：Q948;TP79

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