TAVIs: Topographically Adjusted Vegetation Index for a Reliable Proxy of Gross Primary Productivity in Mountain Ecosystems
文献类型:期刊论文
作者 | Xie, Xinyao2; Zhao, Wei2; Yin, Gaofei1 |
刊名 | IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING |
出版日期 | 2024 |
卷号 | 62页码:12 |
ISSN号 | 0196-2892 |
关键词 | Gross primary productivity (GPP) micrometeorology-related topographic effect remotely sensed (RS)-related topographic effect topography vegetation index (VI) |
DOI | 10.1109/TGRS.2023.3336727 |
英文摘要 | Remotely sensed (RS) vegetation indices (VIs) are increasingly being employed as a direct proxy for gross primary productivity (GPP). When estimating mountain vegetation GPP from VI, efforts often focus on the RS-related topographic effect (i.e., distort VIs), while the micrometeorology-related topographic effect is so far ignored. Here, a topographically adjusted VI (TAVI) scheme was developed based on removing the RS-related effect by path length correction (PLC) first and integrating the micrometeorology-related effect associated with the topography-induced redistributions of radiation and water subsequently. The proposed TAVI scheme was applied to three VIs, namely, normalized difference VI (NDVI), enhanced VI (EVI), and near-infrared reflectance of vegetation (NIRv), at 14 eddy covariance (EC) sites. The determination coefficient (R-2) and root-mean-square-error (RMSE) between VI-estimated and EC GPP were used for evaluation. Results showed that both EVI and NIRv outperformed NDVI in GPP estimation before correction, with R-2 increased by 0.14-0.15 and RMSE decreased by 0.42-0.44 gC center dot m(-2)center dot day(-1). After correcting the RS-related topographic effect, EVI and NIRv achieved an obvious improvement (R-2 = 0.71 and RMSE = 2.00 gC center dot m(-2)center dot day(-1)), while NDVI showed little sensitivity to topography. Subsequently, EVI and NIRv showed a notable improvement ( R-2 = similar to 0.77 and RMSE = similar to 1.82 gC center dot m(-2)center dot day(-1)) after integrating the micrometeorology-related topographic effect, and the performance of NDVI was also improved R-2 = 0.73 and RMSE = 1.94 gC center dot m(-2)center dot day(-1)). This study suggests that integrating the micrometeorology-related topographic effect on vegetation photosynthesis into topographically corrected VIs (TCVIs) is an effective way to improve mountain vegetation GPP estimation. |
WOS关键词 | CARBON-DIOXIDE ; CO2 EFFLUX ; FOREST ; MODEL ; WATER ; EXCHANGE ; BOREAL ; NDVI ; EVAPOTRANSPIRATION ; PHOTOSYNTHESIS |
资助项目 | Science and Technology Fundamental Resources Investigation Program |
WOS研究方向 | Geochemistry & Geophysics ; Engineering ; Remote Sensing ; Imaging Science & Photographic Technology |
语种 | 英语 |
出版者 | IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC |
WOS记录号 | WOS:001125847000044 |
资助机构 | Science and Technology Fundamental Resources Investigation Program |
源URL | [http://ir.imde.ac.cn/handle/131551/57829] |
专题 | 成都山地灾害与环境研究所_数字山地与遥感应用中心 |
通讯作者 | Yin, Gaofei |
作者单位 | 1.Southwest Jiaotong Univ, Fac Geosci & Environm Engn, Chengdu 610031, Peoples R China 2.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China |
推荐引用方式 GB/T 7714 | Xie, Xinyao,Zhao, Wei,Yin, Gaofei. TAVIs: Topographically Adjusted Vegetation Index for a Reliable Proxy of Gross Primary Productivity in Mountain Ecosystems[J]. IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING,2024,62:12. |
APA | Xie, Xinyao,Zhao, Wei,&Yin, Gaofei.(2024).TAVIs: Topographically Adjusted Vegetation Index for a Reliable Proxy of Gross Primary Productivity in Mountain Ecosystems.IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING,62,12. |
MLA | Xie, Xinyao,et al."TAVIs: Topographically Adjusted Vegetation Index for a Reliable Proxy of Gross Primary Productivity in Mountain Ecosystems".IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING 62(2024):12. |
入库方式: OAI收割
来源:成都山地灾害与环境研究所
其他版本
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。