气候变化领域集成服务门户(CCPortal): The increasing water clarity of Tibetan lakes over last 20 years according to MODIS data

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DOI	10.1016/j.rse.2020.112199
	The increasing water clarity of Tibetan lakes over last 20 years according to MODIS data
	Liu, Chong; Zhu, Liping; Li, Junsheng; Wang, Junbo; Ju, Jianting; Qiao, Baojin; Ma, Qingfeng; Wang, Shenglei
通讯作者	Liu, C ; Zhu, LP (通讯作者)
发表日期	2021
ISSN	0034-4257
EISSN	1879-0704
卷号	253
英文摘要	Water clarity is a comprehensive indicator of the water environment status. Studies have shown that in recent years the clarity of inland and ocean water has decreased in many parts of the world owing to the influence of climate change and human activities. However, changes in inland water clarity exclusively resulting from climate change are largely ignored because most inland water is being utilized by human beings for applications such as waterworks or aquaculture. Therefore, understanding the trends and reasons of inland water clarity under natural conditions is important to recognize the inland water environment shifts under the global changes. Because of the harsh environment, the lakes on the Tibetan Plateau are less disturbed by human activities and are ideal objects for studying water clarity variations attributed to climatic changes. Here, we describe water clarity changes as measured using the Secchi Depth (SD) in 152 big lakes with an area greater than 50 km(2) based on in-situ investigations and the retrieval results from a high accuracy retrieval model (r = 0.94, P < 0.01). Most of the lakes had an SD of 3-10 m, although there was marked spatial variation and a significant positive correlation with lake area (P < 0.01). The mean SD of all 152 lakes significantly increased at a rate of 0.033 m/year (95% CI, 0.021-0.045; P < 0.01) between 2000 and 2019. Variations in lake SD were linked with temporal changes in precipitation, and related to spatial changes of water optical components including suspended matter (0.13 < R-2 < 0.40, P < 0.01 or P < 0.05), fDOM (R-2 = 0.24, P < 0.01) and chlorophyll-a concentration (R-2 = 0.12, P < 0.01). The reconstructed lake water clarity in our study will improve the understanding of inland water clarity changes and provide basic data to study the heat exchanges between lake water and atmosphere.
关键词	REMOTE-SENSING REFLECTANCE DISSOLVED ORGANIC-MATTER COMMUNITY SIZE STRUCTURE SECCHI DISK DEPTH NAM CO LAKE SPECTRAL ABSORPTION TEMPERATURE-CHANGES OCEAN TRANSPARENCY STORAGE CHANGES POYANG LAKE
英文关键词	Lake; Clarity; Secchi depth (SD); MODIS; Remote sensing; Tibetan plateau; Climate change
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Remote Sensing ; Imaging Science & Photographic Technology
WOS类目	Environmental Sciences ; Remote Sensing ; Imaging Science & Photographic Technology
WOS记录号	WOS:000604327900005
来源期刊	REMOTE SENSING OF ENVIRONMENT
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/260401
推荐引用方式 GB/T 7714	Liu, Chong,Zhu, Liping,Li, Junsheng,et al. The increasing water clarity of Tibetan lakes over last 20 years according to MODIS data[J]. 中国科学院青藏高原研究所,2021,253.
APA	Liu, Chong.,Zhu, Liping.,Li, Junsheng.,Wang, Junbo.,Ju, Jianting.,...&Wang, Shenglei.(2021).The increasing water clarity of Tibetan lakes over last 20 years according to MODIS data.REMOTE SENSING OF ENVIRONMENT,253.
MLA	Liu, Chong,et al."The increasing water clarity of Tibetan lakes over last 20 years according to MODIS data".REMOTE SENSING OF ENVIRONMENT 253(2021).