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[1]LIU Heng,TANG Diwei,SUN Yi,et al.Spatiotemporal Variation of NDVI in the Vegetation Growing Season of Wuling Mountainous Area and Its Response to Climate Change During 2000—2019[J].Research of Soil and Water Conservation,2021,28(05):245-253.

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Spatiotemporal Variation of NDVI in the Vegetation Growing Season of Wuling Mountainous Area and Its Response to Climate Change During 2000—2019

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 28 Number of periods: 2021 05 Page number: 245-253 Column: Public date: 2021-08-20

Title:: Spatiotemporal Variation of NDVI in the Vegetation Growing Season of Wuling Mountainous Area and Its Response to Climate Change During 2000—2019

Author(s):: LIU Heng¹,TANG Diwei¹,SUN Yi¹,SONG Eping¹,CHANG Sheng¹,LIU Xiaofang²; (1.College of Forestry and Horticulture,Hubei Minzu University,Enshi,Hubei 445000,China; 2.Natural Resources and Planning Bureau of Enshi Tujia & Miao Autonomous Prefecture,Enshi,Hubei 445000,China)

Keywords:: Wuling Mountainous Area; NDVI; spatiotemporal variation; climate change response

CLC:: P964; Q948

DOI:: -

Abstract:: In order to clarify the spatiotemporal variation characteristics of vegetation covers in the Wuling Mountainous Area and their responses to climate change,based on the MODIS NDVI and the meteorological data of the same period,the coefficient of variation,Sen trend test,and Hurst index were used to analyze the spatiotemporal variation of NDVI during vegetation growing season from 2000 to 2019 in the Wuling Mountainous Area. Meanwhile,the response characteristics of NDVI to different scales of hydrothermal factors were revealed. The results show that:(1)as for the temporal pattern of the recent 20 years,vegetation conditions had shown the trend of increasing fluctuation and continuously improving; the vegetation coverage in the Wuling Mountainous Area was good,and its spatial pattern could be summarized as ‘high in the northeast,low in the southeast and west'; the spatial variation was in a relatively stable state,and its value increased first and then decreased with the elevation; the variation trend of NDVI was mostly insignificant with the annual growth rate of only 0.004,while the degradation area mainly concentrated below the altitude of 2 000 m; the overall spatial change tended to be anti-persistent,and the main characteristics of future change are decline;(2)during the vegetation growing season of the research period,the climate in the Wuling Mountainous Area was getting warmer and wetter; NDVI was positively correlated with temperature and precipitation as a whole,but it was more affected by the latter; on the monthly scale,the overall response of NDVI to temperature showed no obvious hysteresis,while the response to precipitation was mainly manifested as a lag of one month; in the lag period from 0 to 2 months,the main controlling climate factors were precipitation,temperature,and temperature in turn. The results can provide some reference for vegetation protection in this area under the background of climate change.

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Last Update: 2021-08-20