本文利用1985-1990年连续69个月的NOAA时间序列数据, 进行中国植被覆盖变化的空间, 以及时间序列分析, 并且结合同期的月平均气温、降水数据, 进行植被覆盖变化与气候因子相关性分析。该文证实了在中国植被覆盖随时间的推移规律, 空间分布规律, 以及植被覆盖变化与气温、降水的定量关系。

By using NOAA temporal series data during the period 1985一1990 (69 months),this study examines the Vegetation-Cover change with time and space in China. Furthermore, the ana1ysis about correlation . between Vegetation-Cover change and environmental factors is also accomplished by combining simu1taneous average temperature and precipitation .data in each month. The methods employed include Sample Transect Ana1ysis, Partia1 Correlation Ana1ysis, and GIS Spatia1 Calcu1ation. From the above ana1ysis, we can draw the following conclusions: 1. The vegetation index generally represents the situation of the superficial vegetation cover. Heat and water condition determine the whole spatia1 distribution pattem of vegetation index and build the regional attribute in longitude and latitude. The partia1 fluctuation of the vegetation index is essentia11y affected by landscape and soil conditions. This defines its regiona1 distribution pattem. 2. Lying on the same longitude, the vegetation index obviously. corresponds to the seasonal movement law, and span of the movement in time and space is much greater than that along the same latitude. The type and ways of the green wave movement synchronize with the seasonal movement of the continenta1 main controlling air mass and are influenced by it. 3.The vegetation index increases and decreases with the warming and cooling of the climate.So it has typically seasona1 change characteristics. Along the same longitude, the higher the latitude is,the greater the scope of seasonal change will be. In summer there is no evident difference of vegetation index between southem and northem region. But in winter，this difference is quite obvious. 4. In a large range, the vegetation index change is driven by water and heat conditions. In eastem moist monsoon zone of China,along. the same longitude,the temperature is the most important influential parameter.The correlation between the vegetation index change and monthly average temperature is obvious.So the heat is key natural limited factor for the growth of the vegetation. Yet, in northem China, along the same latitude, from east to west，it sequentially covers the humid monsoon zone, semi-arid and arid desert zone. The relationship between the vegetation index change and monthly average precipitation is well correlated positively. It proves that in a dry area, water source is the essential limited condition for the growth of the vegetation.