| 1982—1999年我国植被净第一性生产力及其时空变化 |
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| 引用本文： | 朴世龙,方精云,郭庆华. 1982—1999年我国植被净第一性生产力及其时空变化[J]. 北京大学学报(自然科学版), 2001, 37(4): 563-569 |
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| 作者姓名： | 朴世龙 方精云 郭庆华 |
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| 作者单位： | 北京大学城市与环境学系，北京大学地表过程分析与模拟教育部重点实验室，北京，100871 |
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| 基金项目： | 国家重点基础研究发展计划(973计划);G2000046801; |
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| 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0.024PgC·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。
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| 关 键 词： | CASA模型 时空变化 净第一性生产力 NDVI |
| 收稿时间： | 2000-04-04 |
| 修稿时间： | 2001-04-04 |
Terrestrial Net Primary Production and Its Spatio-temporal Patterns in China during 1982-1999 |
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| PIAO Shilong FANG Jingyun GUO Qinghua. Terrestrial Net Primary Production and Its Spatio-temporal Patterns in China during 1982-1999[J]. Acta Scientiarum Naturalium Universitatis Pekinensis, 2001, 37(4): 563-569 |
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| Authors: | PIAO Shilong FANG Jingyun GUO Qinghua |
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| Affiliation: | Department of Urban & Environmental Science, Key Lab for Earth Surface Processes of the Ministry of Education, Peking University, Beijing, 100871 |
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| 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 1.8PgC and a mean increasing rate of 0.024PgC·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. |
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| Keywords: | CASA model spatio|temporal pattern net primary productivity (NPP) NDVI |
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