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基于植被光学厚度的全球植被动态监测进展

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植被光学厚度(vegetation optical depth,VOD)为一种基于微波的植被含水量和生物量估算方法.与光学遥感相比,卫星VOD对大气扰动的敏感性较低,可测量植被不同方面的特征和信息,为全球植被监测提供了一个独立和互补的数据源,已经被广泛用于研究全球气候和环境变化对植被的影响.了解目前VOD在全球植被动态监测的应用研究进展,对其进一步发展和深入应用非常重要.鉴于此,文章首先重点介绍了被动微波和主动微波反演VOD的主要方法,对比分析不同传感器VOD产品的主要特点;然后,从植被特征监测(如植被含水量、生物量)、碳平衡分析、干旱监测、物候分析等方面总结当前VOD在植被动态监测应用方面的研究进展;最后,探讨了VOD产品的优缺点和改进方法,进一步展望了VOD技术在植被动态监测中的应用前景.
Advances in research on the dynamic monitoring of global vegetation based on the vegetation optical depth
The vegetation optical depth(VOD)serves as a microwave-based method for estimating vegetation water content and biomass.Compared to optical remote sensing,the satellite-based VOD,exhibiting a lower sensitivity to atmospheric disturbances,can measure the characteristics and information of vegetation in various aspects,thus providing an independent and complementary data source for global vegetation monitoring.It has been extensively applied to investigate the effects of global climate and environmental changes on vegetation.Discerning the research advances of VOD application in the dynamic monitoring of global vegetation is critical for VOD's further development and application.Hence,this study first presented the primary methods for obtaining the VOD through inversion of passive and active microwave data,comparatively analyzing the principal characteristics of various sensor VOD products.Then,this study generalized the current research advances of VOD in the dynamic monitoring of vegetation in terms of vegetation characteristic monitoring(like vegetation water content and biomass),carbon balance analysis,drought monitoring,and phenological analysis.Finally,this study expounded the advantages,limitations,and improvement approaches of VOD products,envisioning the application prospect of VOD in the dynamic monitoring of vegetation.

vegetation optical depthvegetation water contentbiomassvegetation phenological analysiscarbon balance analysis

杨妮、邓树林、樊艳红、谢国雪

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中国地质大学(武汉)地理与信息工程学院,武汉 430074

广西财经学院管理科学与工程学院,南宁 530003

南宁师范大学地理科学与规划学院,南宁 530001

广西农业科学院农业科技信息研究所,南宁 530003

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植被光学厚度 植被含水量 生物量 植被物候分析 碳平衡分析

国家自然科学基金广西科技基地和人才专项广西自然科学基金广西壮族自治区哲学社会科学规划研究项目广西壮族自治区高等学校中青年教师科研基础能力提升项目统计学广西一流学科建设项目

桂科42061071AD202970272021GXNSFBA22006122FTJ0032021KY0397桂教科研[2022]1号

2024

自然资源遥感
中国国土资源航空物探遥感中心

自然资源遥感

CSTPCD北大核心
影响因子:1.275
ISSN:2097-034X
年,卷(期):2024.36(2)
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