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作 者 ：李伟,张国明*,李兆君

期 刊 ：生态学报 2008年 28卷 9期 页码：4173~4183

关键词：净第一性生产力；东亚地区；时空格局；遥感；

Keywords:net primary productivity, east Asia region, spatio-temproal pattern, remote sensing,

摘 要 ：利用植被分类数据、NDVI数据、气象数据以及观测数据，基于CASA生态系统模型，估算了东亚地区(10~70°N，70~170°E)陆地生态系统植被净第一性生产力。结果表明：1982~1999年研究区总NPP呈现波动增加趋势，平均每年增加008833PgC。18a间NPP平均值为14.24 PgC，约占全球总NPP的22.6%~23.9%。研究区NPP年变化呈单峰曲线，最大值出现在7月份，达2.98PgC，全年中NPP积累主要发生在4~10月份，该时段内NPP总量占全年总量的86.81%。春、夏、秋、冬四季NPP平均总量分别为：2.31、8.16、2.79、1.10 PgC，分别占全年NPP平均总量的16.20%、57.27%、19.58%、773%。将NPP年平均值分成3个范围：低值区(7.82~300gC·m-2)、中值区(301~700 gC·m-2)、高值区(>700 gC·m-2)，分别研究了其空间分布特征。

Abstract:By using vegetation type map, NDVI (normalized difference vegetation index) data sets, meteorological data and observed NPP data, the paper droved CASA (Carnegie-Ames-Stanford Approach) ecosystem model to estimate net primary productivity for terrestrial ecosystem in East Asia region (10-70°N，70-170°E). The results indicated that NPP tends to increase during 1982-1999, with an average increase of 0.08833PgC per year. The mean total NPP during 1982-199 is 14.24 PgC, making up 22.6%～23.9% of global NPP. Annual NPP change takes on a single peak curve. NPP reaches the peak value (2.98PgC) on August. 96.81% of the total NPP accumulates during the period of April to October in a year. On the average, spring, summer, autumn and winter NPP in the study area are 2.31 PgC，8.16 PgC，2.79 PgC and 1.10 PgC, comprising 16.20%，57.27%，19.58% and 7.73% of the total annual NPP, respectively. This paper divided NPP value of the study area into the low value zone (7.82-300gC·m-2), middle value zone (301-700 gC·m-2) and high value zone (>700 gC·m-2) and studied their spatial distribution characters.

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