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遥感技术与应用  2015, Vol. 30 Issue (5): 884-890    DOI: 10.11873/j.issn.1004-0323.2015.5.0884
模型与反演     
基于Landsat TM/ETM+影像的武汉市冬季NPP估算及其时空变化分析
管小彬1,沈焕锋1,甘文霞2,张良培2
(1.武汉大学资源与环境学院,湖北 武汉 430079;
2.武汉大学测绘遥感信息工程国家重点实验室,湖北 武汉 430079)
Estimation and Spatiotemporal Analysis of Winter NPP in Wuhan based on Landsat TM/ETM+ Images
Guan Xiaobin1,Shen Huanfeng1,Gan Wenxia2,Zhang Liangpei2
(1.School of Resource and Environmental Science,Wuhan University,Wuhan 430079,China;
2.State Key Laboratory of Information Engineering in Surveying,Mapping and
Remote Sensing,Wuhan University,Wuhan 430079,China)
 全文: PDF 
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30 m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10 a冬季平均NPP为8.55 gC/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10 a武汉市冬季NPP最高的区域由黄陂区转移到了江夏区。

关键词: NPPLandsat TM/ETM+CASA模型碳循环    
Abstract:

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 30m from 2001 to 2010.The result shows that the average winter NPP in Wuhan is 8.55 gC/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.

Key words: NPP    Landsat TM/ETM+    CASA model    Carbon cycling
收稿日期: 2014-04-23 出版日期: 2015-12-08
:  TP 79  
基金资助:

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)。

通讯作者: 沈焕锋(1980-),男,河北河间人,教授、博导,主要从事遥感信息处理与应用方面的研究。Email:shenhf@whu.edu.cn。    
作者简介: 管小彬(1993-),男,江西赣州人,硕士研究生,主要从事遥感应用方面的研究。Email:guanxb9366@qq.com。
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引用本文:

管小彬,沈焕锋,甘文霞,张良培. 基于Landsat TM/ETM+影像的武汉市冬季NPP估算及其时空变化分析[J]. 遥感技术与应用, 2015, 30(5): 884-890.

Guan Xiaobin,Shen Huanfeng,Gan Wenxia,Zhang Liangpei. Estimation and Spatiotemporal Analysis of Winter NPP in Wuhan based on Landsat TM/ETM+ Images. Remote Sensing Technology and Application, 2015, 30(5): 884-890.

链接本文:

http://www.rsta.ac.cn/CN/10.11873/j.issn.1004-0323.2015.5.0884        http://www.rsta.ac.cn/CN/Y2015/V30/I5/884

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