气候变化领域集成服务门户(CCPortal): The Status and Influencing Factors of Surface Water Dynamics on the Qinghai-Tibet Plateau During 2000-2020

CCPortal

DOI	10.1109/TGRS.2022.3231552
	The Status and Influencing Factors of Surface Water Dynamics on the Qinghai-Tibet Plateau During 2000-2020
	Ran, Qinwei; Aires, Filipe; Ciais, Philippe; Qiu, Chunjing; Hu, Ronghai; Fu, Zheng; Xue, Kai; Wang, Yanfen
发表日期	2023
ISSN	0196-2892
EISSN	1558-0644
卷号	61
英文摘要	The Qinghai-Tibet Plateau is rich in water resources with numerous lakes, rivers, and glaciers, and, as a source of many rivers in Central Asia, it is known as the Asian Water Tower. Under global climate change, it is critical to understand the current influencing factors on surface water area in this region. Although there are numerous studies on surface water mapping, they are still limited by temporal/spatial resolution and record length. Moreover, the complicated topographic condition makes it challenging to map the surface water accurately. Here, we proposed an automatic two-step annual surface water classification framework using long time-series Landsat images and topographic information based on the Google Earth Engine (GEE) platform. The results showed that the producer accuracy (PA) and user accuracy (UA) of the surface water map in the Qinghai-Tibet Plateau in 2020 were 99% and 90%, respectively, and the Kappa coefficient reached 0.87. Our dataset showed high consistency with high-resolution images, indicating that the proposed large-scale water mapping method has great application potential. Furthermore, a new annual surface water area dataset on the Qinghai-Tibet Plateau from 2000 to 2020 was generated, and its relationship with climate, vegetation, permafrost, and glacier factors was explored. We found that the mean surface water area was about 59 481 km(2), and there was a significant increasing trend (=322 km(2)/year, p < 0.01) during 2000-2020 in the plateau. Greening, warming, and wetting climate conditions contributed to the increase of surface water area. Active layer thickness and permafrost types may be the most related to the decrease of surface water area. This study provides important information for ecological assessment and protection of the plateau and promotes the implementation of sustainable development goals related to surface water resources.
关键词	Influencing mechanism Qinghai-Tibet plateau random forest (RF)spatial-temporal variability surface water mapping two-step classification framework
英文关键词	GOOGLE EARTH ENGINE; LAND-COVER CLASSIFICATION; CLIMATE-CHANGE; RANDOM FOREST; IMAGE CLASSIFICATION; CROPLAND EXTENT; TIME-SERIES; LAKES; VEGETATION; PERMAFROST
WOS研究方向	Geochemistry & Geophysics ; Engineering, Electrical & Electronic ; Remote Sensing ; Imaging Science & Photographic Technology
WOS记录号	WOS:000967023700001
来源期刊	IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/282736
作者单位	Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; CEA; Centre National de la Recherche Scientifique (CNRS); Universite Paris Saclay; Universite PSL; Observatoire de Paris; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS
推荐引用方式 GB/T 7714	Ran, Qinwei,Aires, Filipe,Ciais, Philippe,et al. The Status and Influencing Factors of Surface Water Dynamics on the Qinghai-Tibet Plateau During 2000-2020[J],2023,61.
APA	Ran, Qinwei.,Aires, Filipe.,Ciais, Philippe.,Qiu, Chunjing.,Hu, Ronghai.,...&Wang, Yanfen.(2023).The Status and Influencing Factors of Surface Water Dynamics on the Qinghai-Tibet Plateau During 2000-2020.IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING,61.
MLA	Ran, Qinwei,et al."The Status and Influencing Factors of Surface Water Dynamics on the Qinghai-Tibet Plateau During 2000-2020".IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING 61(2023).