The biophysical climate mitigation potential of riparian forest ecosystems in arid Northwest China.

Autor: Yonghong S; Key Laboratory of Eco-hydrology of Inland River Basin (CAS), Northwest Institute of Eco-Environment and Resources, CAS, Lanzhou 730000, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China. Electronic address: syh@lzb.ac.cn., Fandi L; School of Life Sciences, Lanzhou University, Lanzhou 730000, China. Electronic address: luofd20@lzu.edu.cn., Gaofeng Z; College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China., Zhang K; Department of Mathematics, The University of Hong Kong, Hong Kong, China; School of Biological Sciences, The University of Hong Kong, Hong Kong, China., Qi Z; Key Laboratory of Eco-hydrology of Inland River Basin (CAS), Northwest Institute of Eco-Environment and Resources, CAS, Lanzhou 730000, China.
Jazyk: angličtina
Zdroj: The Science of the total environment [Sci Total Environ] 2023 Mar 01; Vol. 862, pp. 160856. Date of Electronic Publication: 2022 Dec 12.
DOI: 10.1016/j.scitotenv.2022.160856
Abstrakt: Forests influence climate through both the biochemical and biophysical processes, and the impacts of the latter on local climate may be much larger than the former. However, the biophysical effects of afforestation in arid regions have received little attention compared with afforestation in the tropic, temperate and boreal zones. In this study, we combined in situ eddy covariance flux measurements from a neighboring pairs of forested and background desert sites with the decomposed temperature metric (DTM) method to characterize the impacts of arid forests on surface temperature (T s ). A clear-sky, one-dimensional planetary boundary layer (PBL) model was used to estimate the impacts of afforestation on state of regional climate. We showed that despite absorbing more net radiation (35.4 W m -2 ) the riparian forests tended to cool T s (-1.28 °C) on annual basis, but with a significant seasonality. Specifically, afforestation may lead to a net cooling effect from March to September and a slightly warming effect in other months. The DTM method revealed that evapotranspiration played a dominant role in cooling surface temperature, while surface albedo (α) and incoming longwave radiation (L↓) acted together to increase forest surface temperature. From June to September, a shallower, cooler and wetter boundary layer was developed over the forest due to high plant transpiration. In other months, the PBL was slightly deeper and warmer over the forest than that over the desert. Therefore, the riparian forests were important in moderating warming trends in arid regions.
Competing Interests: Declaration of competing interest We declared that we have no financial and personal relationships with other people or organizations that can inappropriately influence our work. All authors have agreed the submits of this paper to your Journal. We declared that we will not submit this paper to another Journal until we hear from you.
(Copyright © 2022. Published by Elsevier B.V.)
Databáze: MEDLINE
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