【摘要】 基于地理信息系统和卫星遥感技术 ,利用植被、气候和土壤等地面空间数据 ,应用CASA模型估算了 1982— 1999(除 1994 )年间我国植被年净第一性生产量及其时空变化。结果表明 :18年间我国植被净第一性生产量呈增加趋势 ,平均增加速率为 0 0 2 4PgC·a-1,其均值为 1 8PgC ,其中高寒植被、常绿阔叶林和常绿针叶林的增加速度最快 ;降水是限制我国植被净第一性生产力的主要因子。更多还原

【Abstract】 The net primary production (NPP) of Chinese terrestrial vegetation during 1982—1999 (excluding 1994 because of missing data) was estimated, and its spatio\|temporal patterns were explored, based on the CASA (Carnegie\|Ames \|Stanford Approach) model and using remote sensing imagery (NOAA/AVHRR) and land spatial data of vegetation, climate, soil and solar radiation. As results, terrestrial NPP in China indicated a significant increase over the past 18 years, with an average value of 1 8?PgC and a mean increasing rate of 0 024?PgC·a -1 . The NPPs in alpine meadow vegetation, evergreen broadleaf and evergreen needle\|leaf forests showed a marked increase. Precipitation is a limiting factor for terrestrial NPP in China.更多还原