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作 者 ：王宏;李晓兵;韩瑞波;盖永芹

期 刊 ：应用生态学报 2006年 17卷 12期 页码：2236-2240

关键词：植被；

摘 要 ：将中国北方13个省按纬向划分为5个区域：32°～36°N（区域Ⅰ）、36°～40°N（区域
Ⅱ）、40°～44°N（区域Ⅲ）、44°～48°N（区域Ⅳ）和48°～52°N（区域Ⅴ），然后
利用Savitzky-Golay滤波算法平滑了1982～1999年NOAA/AVHRR NDVI和MSAVI时间序列
影像，基于经验正交函数（EOF）分析提取了不同区域植被NDVI和MSAVI主分量，估测了
1982～1999年中国北方不同纬度带的植被生长季开始、结束和长度，最后对1982～1999年
不同区域的生长季参数进行了线性拟合，分析了不同区域的植被生长季变化趋势.研究表明，不同
纬度带的植被生长季开始日期均表现出不同程度的提前趋势，区域Ⅳ的植被生长季开始提前趋势
最大；生长季结束日期呈现推迟的趋势，区域Ⅱ的植被活动结束日期的推迟趋势最大，而区域Ⅲ
最小.整个生长季长度呈延长趋势，延长日期在10 d以上.

Abstract:In this study, North China was latitudinally divided into five zones, i.e., 32°～
36° N (Zone I), 36°～40° N (Zone II), 40°～44° N (Zone III), 44°～48° N
(Zone IV) and 48°～52° N (Zone V), and the NOAA/AVHRR NDVI and MSAVI time-series images from 1982 to 1999 were smoothed with Savitzky-Golay filter
algorithm. Based on the EOF analysis, the principal components of NDVI and
MSAVI for the vegetations in different latitudinal zones of North China were
extracted, the annual beginning and ending dates and the length of growth
season in 1982～1999 were estimated, and the related parameters were
linearly fitted, aimed to analyze the variability of vegetation growth season. The
results showed that the beginning date of the growth season in different zones
tended to be advanced, while the ending date tended to be postponed with
increasing latitude. The length of the growth season was also prolonged, with the
prolonging time exceeded 10 days.

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