Zhang Tong, Xu Xia, Jiang Honglei, Qiao Shirong, Guan Mengxi, Huang Yongmei, Gong Rong
State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing 100875, China; College of Natural Resources Science and Technology, Beijing Normal University, Beijing 100875, China; Faculty of Geographical Science, Beijing Normal University, Beijing 100875, China.
State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing 100875, China; College of Natural Resources Science and Technology, Beijing Normal University, Beijing 100875, China; Faculty of Geographical Science, Beijing Normal University, Beijing 100875, China.
Sci Total Environ. 2022 Jun 15;825:153682. doi: 10.1016/j.scitotenv.2022.153682. Epub 2022 Feb 5.
Vegetation dynamics are sensitive to climate change. Wind is an important climate factor that can affect carbon fluxes by altering carbon uptake and emission rates; however, the impact of wind has not been fully considered in previous studies; therefore, exploring the characteristics of vegetation responses to wind speed is crucial to sustainable natural resource utilization and ecological restoration. In this study, the global leaf area index (LAI) from 1984 to 2013 was used to investigate the vegetation spatial heterogeneities, change processes, and relative contributions of climate change. The differences in vegetation responses to climate factors, such as precipitation (PRE), temperature (TEM), and wind speed (WD), were compared by considering the effects of wind. The results revealed that (1) the global vegetation (86.24%) exhibited a greening trend, among which evergreen broad-leaved forests (0.0052 a) changed the most. (2) The wind speed explained 31.54% of the vegetation variations, which is higher than the contribution of other factors. (3) Reduction of wind speed had a positive impact on vegetation changes. The contribution of climate to vegetation growth increased by 8.14% when considering the effects wind speed, particularly in India and South America. Wind speed effects were essential for enhancing the vegetation dynamics assessment and improving the prediction accuracy of the model.
植被动态对气候变化敏感。风是一个重要的气候因子,它可以通过改变碳吸收和排放速率来影响碳通量;然而,风的影响在以往研究中尚未得到充分考虑;因此,探究植被对风速的响应特征对于自然资源的可持续利用和生态恢复至关重要。在本研究中,利用1984年至2013年的全球叶面积指数(LAI)来研究植被的空间异质性、变化过程以及气候变化的相对贡献。通过考虑风的影响,比较了植被对降水(PRE)、温度(TEM)和风速(WD)等气候因子的响应差异。结果表明:(1)全球植被(86.24%)呈现绿化趋势,其中常绿阔叶林(0.0052 a)变化最大。(2)风速解释了31.54%的植被变化,高于其他因子的贡献。(3)风速降低对植被变化有积极影响。考虑风速影响时,气候对植被生长的贡献增加了8.14%,特别是在印度和南美洲。风速效应对于加强植被动态评估和提高模型预测精度至关重要。