Different Influences of Vegetation Greening on Regional Water-Energy Balance under Different Climatic Conditions
文献类型：期刊论文
| 作者 | Zhang, Dan2; Liu, Xiaomang1; Bai, Peng1 |
| 刊名 | FORESTS
 |
| 出版日期 | 2018-07-01 |
| 卷号 | 9期号:7页码:15 |
| 关键词 | vegetation greening water-energy balance quantification different climatic conditions |
| ISSN号 | 1999-4907 |
| DOI | 10.3390/f9070412 |
| 通讯作者 | Liu, Xiaomang(hydroliu@163.com) |
| 英文摘要 | Vegetation serves as a key element in the land-atmospheric system, and changes in vegetation can impact the regional water-energy balance via several biophysical processes. This study proposes a new water-energy balance index that estimates the available-water-to-available-energy ratio (WER) by improving upon the Budyko framework, which evaluates climate variation and vegetation change. Moreover, the impact of vegetation greening on WER is quantified in 34 catchments under different climatic conditions. The results show that the normalized difference vegetation index (NDVI) increased at all the catchments, which indicates that there was a vegetation greening trend in the study area. There are negative relationships between the NDVI and runoff at both water-limited and energy-limited catchments, which demonstrates that both types of catchments became drier due to vegetation greening. Four numerical experiments were executed to quantify the contribution of vegetation greening and climate variations to WER changes. The results show that the calculated WER trends by numerical tests fit well with the observed WER trends (R-2 = 0.96). Vegetation greening has positive influences on WER changes under energy-limited conditions, which indicates that residual energy decreases faster than water availability, resulting in less energy for sensible heat, i.e., a cooling effect. Nevertheless, vegetation greening has negative influences on WER under water-limited conditions, which indicates that water availability decreases faster than residual energy, resulting in more energy for sensible heat. Notably, the WER decrease in water-limited catchments is dominated by potential evapotranspiration and NDVI variation, whereas the WER change in energy-limited catchments is dominated by climate variation. This study provides a comprehensive understanding of the relationships among water, energy and vegetation greening under different climatic conditions, which is important for land-atmosphere-vegetation modeling and designing strategies for ecological conservation and local water resource management. |
| WOS关键词 | AVHRR-NDVI DATA ; RIVER-BASIN ; LAND-USE ; CHINA ; MODEL ; EVAPOTRANSPIRATION ; EVAPORATION ; FOREST ; STREAMFLOW ; RESOLUTION |
| 资助项目 | Natural Science Foundation of China[41771039] ; Natural Science Foundation of China[41330529] ; Natural Science Foundation of China[41571023] ; Youth Innovation Promotion Association, CAS[2018067] |
| WOS研究方向 | Forestry |
| 语种 | 英语 |
| WOS记录号 | WOS:000440018600043 |
| 出版者 | MDPI |
| 资助机构 | Natural Science Foundation of China ; Youth Innovation Promotion Association, CAS |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/54513]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Liu, Xiaomang |
| 作者单位 | 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100011, Peoples R China 2.Chinese Acad Sci, Nanjing Inst Geog & Limnol, Key Lab Watershed Geog Sci, Nanjing 210008, Jiangsu, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Dan,Liu, Xiaomang,Bai, Peng. Different Influences of Vegetation Greening on Regional Water-Energy Balance under Different Climatic Conditions[J]. FORESTS,2018,9(7):15. |
| APA | Zhang, Dan,Liu, Xiaomang,&Bai, Peng.(2018).Different Influences of Vegetation Greening on Regional Water-Energy Balance under Different Climatic Conditions.FORESTS,9(7),15. |
| MLA | Zhang, Dan,et al."Different Influences of Vegetation Greening on Regional Water-Energy Balance under Different Climatic Conditions".FORESTS 9.7(2018):15. |
入库方式： OAI收割
来源：地理科学与资源研究所
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