Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2020WR028224 |
Estimation of Turbulent Heat Fluxes and Gross Primary Productivity by Assimilating Land Surface Temperature and Leaf Area Index | |
Xinlei He; Tongren Xu; Sayed M. Bateni; Seo Jin Ki; Jingfeng Xiao; Shaomin Liu; Lisheng Song; Xiangping He | |
2021-10-20 | |
发表期刊 | Water Resources Research |
出版年 | 2021 |
英文摘要 | In this study, land surface temperature (LST) and leaf area index (LAI) observations are merged with a coupled two-source surface energy budget-vegetation dynamic model (TSEB-VDM) via a variational data assimilation (VDA) system to predict turbulent heat fluxes and gross primary productivity (GPP). The TSEB and VDM are coupled by relating photosynthesis in the VDM to transpiration in the TSEB equation. Unknown parameters of the VDA approach are the neutral bulk heat transfer coefficient (CHN), evaporative fractions for soil and canopy (EFS and EFC), and specific leaf area (cg). The VDA approach is evaluated at six AmeriFlux sites with distinct vegetative and climatic characteristics. The modeled sensible (H) and latent (LE) heat fluxes, and GPP agree well with the corresponding eddy covariance measurements in different environmental conditions. The six-site average root mean square error (RMSE) of estimated daily H, LE, and GPP is 42.2 W m-2, 51.5 W m-2, and 1.8 gC m-2 d-1, respectively. The outcomes show that the developed VDA approach is able to exploit the implicit information in the sequences of LST and LAI measurements to estimate H, LE, and GPP. Our findings also indicate that the estimates of the H and LE are more sensitive to uncertainties in LST measurements, while the GPP retrievals are more affected by uncertainties in the LAI observations. This article is protected by copyright. All rights reserved. |
领域 | 资源环境 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/340904 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | Xinlei He,Tongren Xu,Sayed M. Bateni,et al. Estimation of Turbulent Heat Fluxes and Gross Primary Productivity by Assimilating Land Surface Temperature and Leaf Area Index[J]. Water Resources Research,2021. |
APA | Xinlei He.,Tongren Xu.,Sayed M. Bateni.,Seo Jin Ki.,Jingfeng Xiao.,...&Xiangping He.(2021).Estimation of Turbulent Heat Fluxes and Gross Primary Productivity by Assimilating Land Surface Temperature and Leaf Area Index.Water Resources Research. |
MLA | Xinlei He,et al."Estimation of Turbulent Heat Fluxes and Gross Primary Productivity by Assimilating Land Surface Temperature and Leaf Area Index".Water Resources Research (2021). |
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