TY - JOUR
T1 - Temperature changes in three gorges reservoir area and linkage with three gorges project
AU - Song, Zhen
AU - Liang, Shunlin
AU - Feng, Lian
AU - He, Tao
AU - Song, Xiao Peng
AU - Zhang, Lei
N1 - Funding Information:
This study was partially funded by grant 2016YFA0600101, the Chinese Grand Research program on climate change and response, grant 2013AA121201, the Joint Polar-Orbiting Satellite System Program, the National Natural Science Foundation of China (41671338) and the Chinese Scholarship Council. We thank Bingfang Wu of Chinese Academy of Sciences for the helpful discussions and comments. We thank the GLAD group for providing the Landsat data (www.glad.umd.edu), Chinese Academy of Sciences, and Min Feng from University of Maryland for providing the water area data of TGR. We thank the GLASS project team for the albedo data (http://glass-product.bnu.edu.cn/en/); NASA/GSFC for providing MODIS LST, MODIS ET data, (http://reverb.echo. nasa.gov/) and CERES data (https:// ceres.larc.nasa.gov); and the China Meteorological Data Sharing Service System for providing meteorological data (http://data.cma.cn/). We would also like to thank the anonymous reviewers for their valuable comments, which greatly improved the quality of this manuscript.
Publisher Copyright:
© 2017. American Geophysical Union. All Rights Reserved.
PY - 2017
Y1 - 2017
N2 - The Three Gorges Project (TGP) is one of the largest hydroelectric projects throughout the world. It has brought many benefits to the society but also led to endless debates about its environmental and climatic impacts. Monitoring the spatiotemporal variations of temperature in the Three Gorges Reservoir Area (TGRA) is important for understanding the climatic impacts of the TGP. In this study, we used remote sensing-based land surface temperature (LST) and ground-measured air temperature data to investigate temperature changes in the TGRA. Results showed that during the daytime in summer, LST exhibited significant cooling (1-5°C) in the downstream region of the reservoir, whereas LST during the nighttime in winter exhibited significant warming (1-5°C) across the entire reservoir. However, these cooling and warming effects were both locally constrained within 5 km buffer along the reservoir. The changes in air temperature were consistent with those in LST, with 0.67°C cooling in summer and 0.33°C warming in winter. The temperature changes along the reservoir not only resulted from the land-water conversion induced by the dam impounding but were also related to the increase of vegetation cover caused by the ecological restoration projects. Significant warming trends were also found in the upstream of TGRA, especially during the daytime in summer, with up to 5°C for LST and 0.52°C for air temperature. The warming was caused mainly by urban expansion, which was driven in part by the population resettlement of TGP. Based on satellite observations, we investigated the comprehensive climatic impacts of TGP caused by multiple factors.
AB - The Three Gorges Project (TGP) is one of the largest hydroelectric projects throughout the world. It has brought many benefits to the society but also led to endless debates about its environmental and climatic impacts. Monitoring the spatiotemporal variations of temperature in the Three Gorges Reservoir Area (TGRA) is important for understanding the climatic impacts of the TGP. In this study, we used remote sensing-based land surface temperature (LST) and ground-measured air temperature data to investigate temperature changes in the TGRA. Results showed that during the daytime in summer, LST exhibited significant cooling (1-5°C) in the downstream region of the reservoir, whereas LST during the nighttime in winter exhibited significant warming (1-5°C) across the entire reservoir. However, these cooling and warming effects were both locally constrained within 5 km buffer along the reservoir. The changes in air temperature were consistent with those in LST, with 0.67°C cooling in summer and 0.33°C warming in winter. The temperature changes along the reservoir not only resulted from the land-water conversion induced by the dam impounding but were also related to the increase of vegetation cover caused by the ecological restoration projects. Significant warming trends were also found in the upstream of TGRA, especially during the daytime in summer, with up to 5°C for LST and 0.52°C for air temperature. The warming was caused mainly by urban expansion, which was driven in part by the population resettlement of TGP. Based on satellite observations, we investigated the comprehensive climatic impacts of TGP caused by multiple factors.
UR - http://www.scopus.com/inward/record.url?scp=85019073043&partnerID=8YFLogxK
U2 - 10.1002/2016JD025978
DO - 10.1002/2016JD025978
M3 - Article
AN - SCOPUS:85019073043
VL - 122
SP - 4866
EP - 4879
JO - Journal of Geophysical Research
JF - Journal of Geophysical Research
SN - 0148-0227
IS - 9
ER -