| Abstrakt: |
In order to analyze the temporal and spatial changes of natural grassland vegetation coverage in different months of the growing season in Northern Xinjiang and its relationship with meteorological factors, the pixel dichotomy model, change rate analysis and correlation analysis were used to explore the temporal and spatial changes of natural grassland vegetation coverage and its relationship with meteorological factors in Northern Xinjiang in June, July, August and September from 1998 to 2018. The results showed that the vegetation coverages of natural grassland in Northern Xinjiang were lower in the middle and east with less precipitation and higher temperature, higher in the north, west and south with higher altitude, more precipitation and higher relative humidity, which increased from the middle and east to the north, west and south. In June, July, August and September, the natural grassland vegetation coverage in Northern Xinjiang showed no significant decreasing trend, in which the monthly average natural grassland coverage was June>July> September>August. The normalized difference vegetation index of natural grassland in Northern Xinjiang showed an increasing trend in July and decreasing trend in June, August and September. The monthly average natural grassland vegetation coverages in Northern Xinjiang were mainly positively correlated with precipitation and relative humidity in June, July and August, and were mainly positively correlated with temperature and sunshine hours in September. [ABSTRACT FROM AUTHOR] |
