@ The University of Oklahoma

Month: October 2022

New paper on vegetation response to climate change and human activities published in Ecological Indicators

Our new paper, “Vegetation dynamics influenced by climate change and human activities in the Hanjiang River Basin, central China“, is published in Ecological Indicators (IF: 6.263).

The Share Link to download a copy of our paper is https://authors.elsevier.com/sd/article/S1470-160X(22)01059-7 (valid until Dec 11, 2022).

Authors: Shaokang Yang, Ji Liu, Chenghao Wang, Te Zhang, Xiaohua Dong, and Yanli Liu

Abstract: Assessing the dynamics of vegetation and its response to environmental changes is essential to understanding ecosystem changes and the sustainable use of natural resources. In this study, we investigated the impacts of climate change and human activities on vegetation growth in the Hanjiang River Basin. We classified the basin into the portion mainly affected by climate change (VClimate) and the portion affected by both climate change and anthropogenic activities (VClimate+Human). Using an improved residual trend method that considers both lag effect and nonlinear response, we analyzed the relative contributions of climate change and human activities to observed NDVI changes. Results suggest that the basin experienced a statistically significant increase in growing-season NDVI during 2001–2016 (0.047 decade-1). Precipitation was the dominant climatic factor for NDVI change in VClimate+Human, whereas precipitation and temperature were nearly equally important for NDVI change in VClimate. On average, both climate change and human activities promoted vegetation growth during the study period, and their average contributions were 41.4 % and 15.5 %, respectively. In particular, climate change and human activities in general enhanced vegetation growth in non-urban areas, while human activities mainly reduced vegetation growth in urban areas. The findings of this study can benefit regional ecological restoration and environmental management projects.

DOI: https://doi.org/10.1016/j.ecolind.2022.109586

Fig. 8. Contributions of climate change and human activities to growing-season NDVI dynamics in the HJRB in 2001–2016: (a) contribution of precipitation and temperature change (C1 in both VClimate and VClimate+Human), (b) contribution of changes in climatic factors other than precipitation and temperature (C2 in VClimate), (c) contribution of changes in all climatic factors (C1 and C2 in VClimate and C1 in VClimate+Human), and (d) contribution of human activities (C2 in VClimate+Human). Solid circles in black (with names) in (d) are cities. The inset in each subplot shows the distribution of contributions.

New course for spring 2023 – Urban Climatology!

Dr. Chenghao Wang will teach a new course, GEOG/METR 4970-004: Urban Climatology, in spring 2023.

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