气候变化与人类活动对中国西北内陆河流域植被净初级生产力影响的定量分析  

Quantitative analysis of the impact of climate changes and human activities on the NPP of vegetation in the inland river basins of Northwest China

作　　者：何旭洋 张福平 李玲 冯起 魏永芬[4] 李开放 HE Xu-yang;ZHANG Fu-ping;LI Ling;FENG Qi;WEIYong-fen;LI Kai-fang(School of Geography and Tourism,Shaanxi Normal University,Xian 710119,China;Shandong Provincial Institute of Land Surveying and Mapping,Ji'nan 250014,China;Northwest Institute of Eco-environment and Resources,Chinese Academy of Sciences,Lanzhou730000,China;River Basin Research Center,Gifu University,Gifu 5011193,Japan)

机构地区：[1]陕西师范大学地理科学与旅游学院,西安710119 [2]山东省国土测绘院,济南250014 [3]中国科学院西北生态环境资源研究院,兰州730000 [4]日本国立岐阜大学流域圈科学研究中心,日本岐阜501119

出　　处：《兰州大学学报（自然科学版）》2022年第5期650-660,共11页Journal of Lanzhou University(Natural Sciences)

基　　金：教育部人文社会科学研究项目(21YJAZH110);陕西省自然科学基金面上项目(2018JM4020);国家重点研发计划项目(2017YFC0404300)。

摘　　要：利用基于遥感数据的 CASA 模型和变异系数法计算 2000-2020年中国西北内陆河流域的植被实际净初级生产力(NPPA)和潜在净初级生产力, 分析植被 NPPA的时空变化格局和气候因子对植被NPPA的影响, 定量分析气候变化与人类活动对植被 NPPA变化的影响 . 结果表明, 2000-2020 年西北内陆河流域年平均植被 NPPA呈波动增加趋势, 变化范围为 62.64~96.10 g/(m~2·a);草甸、草原和栽培植被的固碳量最大, 灌丛和栽培植被的固碳能力最强;气温、降水与太阳辐射总量是植被 NPPA增加的主导因素, 降水量和相对湿度的变化对于植被 NPPA的促进作用最大 . 气候变化与人类活动共同主导植被 NPPA增加的面积占增加总面积的 49.90%, 人类活动主导植被 NPPA减少的面积占减少总面积的86.06%.Carnegie-Ames-Stanford approach (CASA) model and variation coefficient were used to calculate the actual net primary productivity (NPPA) and potential net primary productivity of vegetation in the inland river basins of Northwest China from 2000 to 2020. The spatio-temporal change pattern of NPPAwas analyzed, impact of climate factors on NPPAdiscussed and impact of climate change and human activities on NPPAincrease/decrease quantitatively analyzed. The results showed that the annual mean NPPAin the inland river basins of Northwest China showed an increasing trend from 2000 to 2020, with a variation range of 62.64-96.10 g/(m~2·a);and the carbon sequestration capacity of meadow, grassland and cultivated vegetation was the largest, while the shrub and cultivated vegetation was the strongest. The temperature, precipitation and total solar radiation were the leading factors for NPPAincrease, and the precipitation and relative humidity had the greatest promoting effect on NPPAincrease. Climate changes and human activities jointly dominated the increase of vegetation NPPA, accounting for 49.90% of the total increasing area, and the decrease of vegetation NPPAdominated by human activities accounted for86.06% of the total decreasing area.

关 键 词：净初级生产力 CASA模型 变异系数 影响因子 西北内陆河流域 

分 类 号：Q148[生物学—生态学]