广东省植被覆盖度时空变化及驱动因素分析

以南方重点林区广东省为研究对象，以2000—2010年MODIS NDVI月度合成数据、2000—2010年全球辐射定标夜间灯光数据DMSP/OLS为主要信息源，在植被覆盖度计算基础上，进行了植被覆盖度时间系列分析、空间趋势面分析、驱动因素分析。结果表明：2001—2010年间，广东省的年均植被覆盖度呈现围绕78.6%均线上下波动、总体趋势保持基本不变的时间系列变化格局；在空间格局上，广东省植被覆盖度从高到低，总体呈现由北向南逐渐降低的带状分布格局；年均植被覆盖度与年降水日高度负相关，与年日照时数低度正相关，与年平均温度、年平均降水量、灯光指数不相关。

Analysis of Spatial-temporal Dynamics and Driving Factors of Vegetation Fractional Coverage in Guangdong Province

Guangdong Province, a key forest region of southern China, was chosen as the case study area, monthly composite data of MODIS NDVI from 2000 to 2010, together with the global radiometric calibrated night light data of DMSP/OLS were gathered as the main source of information to calculate VFC, followed by the analysis of time series, spatial trend surface and driving factors. The results showed that during 2001 to 2010, annual average VFC in Guangdong Province fluctuated around a constant of 78.6%, but the overall trend presented a pattern of roughly unchanged. From the viewpoint of spatial pattern from high to low, VFC in Guangdong Province showed an strip distribution pattern of gradually decreasing from north to south. Annual average VFC was highly negatively correlated with annual precipitation day, weakly positively correlated with annual sunshine hours, not correlated with annual average temperature, annual average precipitation and light index.