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- W4224282249 abstract "Surface radiation budget was an important variable for global climate and eco-environment change. Vegetation exerted significant influences on the budget by altering the surface thermal properties and land-atmospheric interactions, while the sign and magnitude remained unclear. With the aid of satellite observations, this study estimated the vegetation influences through a semi-physical approach. Methodologically, a physical model of the total surface radiation budget (Rnet) was firstly built. Then, the empirical regressions between vegetation with radiation albedo and thermal emissivity were adopted. Finally, the vegetation influences were estimated by measuring the response of budgets (Rsnet, Rlnet and subsequently Rnet) to vegetation perturbance. Our results demonstrated that the global Rnet presented a positive budget (73.20 W/m2) over the past two decades (2001–2020), which was dominated by the positive Rsnet (135.52 W/m2). In contrast, the Rlnet showed a negative value (−60.92 W/m2), which helped to mitigate the warming trend. Vegetation tended to enhance the positive surface radiation budgets. Overall, the vegetation influences on Rsnet, Rlnet and Rnet were 56.20 W/m2, −6.65 W/m2, and 50.29 W/m2, accounting for 41.47 %, 10.92 % and 68.70 % of the total budgets. Temporally, the vegetation influences showed increasing trends of 0.019 W/m2/yr (Rsnet), 0.007 W/m2/yr (Rlnet) and 0.031 W/m2/yr (Rnet). Physically, temporal variations of the vegetation influences were strongly affected by the interactions of atmospheric factors, particularly of the cloud, aerosol, and greenhouse gases (GHGs). Results of this study help to capture characteristics of surface radiation budgets and corresponding mechanism, which could support the climatic adaption and eco-environment management." @default.
- W4224282249 created "2022-04-26" @default.
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- W4224282249 date "2022-07-01" @default.
- W4224282249 modified "2023-10-16" @default.
- W4224282249 title "Vegetation Change Enhanced the Positive Global Surface Radiation Budget" @default.
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- W4224282249 doi "https://doi.org/10.1016/j.asr.2022.04.038" @default.
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