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

CCPortal

DOI	10.1016/j.rse.2020.112199
	The increasing water clarity of Tibetan lakes over last 20 years according to MODIS data
	Liu C.; Zhu L.; Li J.; Wang J.; Ju J.; Qiao B.; Ma Q.; Wang S.
发表日期	2021
ISSN	00344257
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 km2 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 < R2 < 0.40, P < 0.01 or P < 0.05), fDOM (R2 = 0.24, P < 0.01) and chlorophyll-a concentration (R2 = 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. © 2020 Elsevier Inc.
英文关键词	Clarity; Climate change; Lake; MODIS; Remote sensing; Secchi depth (SD); Tibetan plateau
语种	英语
scopus关键词	Lakes; Chlorophyll-a concentration; Harsh environment; In-situ investigations; Natural conditions; Optical components; Positive correlations; Spatial variations; Water environments; Climate change; air-water interaction; climate change; global change; human activity; lake water; MODIS; satellite data; spatial variation; water quality; Qinghai-Xizang Plateau; Indicator indicator
来源期刊	Remote Sensing of Environment
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/179028
作者单位	Key Laboratory of Tibetan Environment Changes and Land Surface Processes (TEL), Institute of Tibetan Plateau Research (ITP), Chinese Academy of Sciences, Beijing, 100101, China; CAS Center for Excellence in Tibetan Plateau Earth System, Beijing, 100101, China; University of Chinese Academy of Sciences, Beijing, 100049, China; Key Laboratory of Digital Earth, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing, 100094, China; Institute of Smart City, Zhengzhou University, Zhengzhou, 450001, China; Peking University, Institute of Remote Sensing and Geographic Information System, 5 Summer Palace Road, Beijing, 100871, China
推荐引用方式 GB/T 7714	Liu C.,Zhu L.,Li J.,et al. The increasing water clarity of Tibetan lakes over last 20 years according to MODIS data[J],2021,253.
APA	Liu C..,Zhu L..,Li J..,Wang J..,Ju J..,...&Wang S..(2021).The increasing water clarity of Tibetan lakes over last 20 years according to MODIS data.Remote Sensing of Environment,253.
MLA	Liu C.,et al."The increasing water clarity of Tibetan lakes over last 20 years according to MODIS data".Remote Sensing of Environment 253(2021).