摘要
植被净第一生产力（NPP）作为反映植被固碳能力的重要指标,在全球CO2浓度上升的背景下,成为研究全球及区域生态系统对气候环境变化响应的热点之一。基于Landsat TM/ETM＋遥感影像数据,采用改进的CASA模型,估算得到武汉市2001~2010年空间分辨率为30m的冬季NPP,并对其进行时空变化分析。研究结果表明：武汉市过去10a冬季平均NPP为8.55gC/m2·m。2001~2010年武汉市冬季NPP整体呈现波动上升的趋势,各区域具有不同的增长速率,其中以江夏区最快,而各植被类型中灌木林具有最快的增长速率和最高的平均NPP。武汉市冬季NPP均呈现从三环区域向四周增大的空间分布特征,过去10a武汉市冬季NPP最高的区域由黄陂区转移到了江夏区。
Net primary productivity（NPP）is an important indicator of vegetation＇s carbon sequestration capacity,with the rapidly rising of CO2 concentration,NPP became one of the hotspots in the research of global climate change.Using the modified CASA model based on the previous studies,integrating with TM/ETM＋image data and terrestrial weather observation data,estimated Wuhan City＇s Winter NPP on the spatial resolution of 30 mfrom 2001to 2010.The result shows that the average winter NPP in Wuhan is8.55gC/m2·m.There was an increasing in winter NPP from 2001 to 2010,and each region has different velocity,Jiangxia is the highest,while shrub has the highest velocity and NPP among all vegetation types.Wuhan winter NPP has an spatial distribution of increasing from city center to around,and the region has the highest NPP which changed from Huangpi to Jiangxia in the past 10 years.
出处
《遥感技术与应用》
CSCD
北大核心
2015年第5期884-890,共7页
Remote Sensing Technology and Application
基金
国家973计划项目"对地观测传感网一体化数据融合与同化方法"(2011CB707103)
国家自然科学基金项目"遥感影像大范围地表信息缺失区域的修复理论与方法研究"(41271376)资助
国家863计划项目"星机地综合观测定量遥感融合处理与共性产品生产系统"(2012AA12A301)
