气候变化领域集成服务门户(CCPortal): Observations of water transparency in China's lakes from space

CCPortal

DOI	10.1016/j.jag.2020.102187
	Observations of water transparency in China's lakes from space
	Liu, Dong; Duan, Hongtao; Loiselle, Steven; Hu, Chuanmin; Zhang, Guoqing; Li, Junli; Yang, Hong; Thompson, Julian R.; Cao, Zhigang; Shen, Ming; Ma, Ronghua; Zhang, Min; Han, Weixiao
通讯作者	Duan, HT (通讯作者)
发表日期	2020
ISSN	1569-8432
EISSN	1872-826X
卷号	92
英文摘要	Water transparency, usually denoted by Secchi disk depth (SSD), represents the first-order description of water quality and has important implications for the diversity and productivity of aquatic life. In China, lakes supply freshwater and ecosystem services to nearly a billion people. Therefore, real time monitoring of lake transparency is of great significance. Moreover, understanding how and why transparency varies in space and time in response to different driving forces is needed to understand, manage, and predict lake water quality. Based on the time-saving and low-cost Google Earth Engine cloud platform, this study developed a new algorithm for quickly mapping SDDs in Chinese lakes. SDDs were retrieved for 412 Chinese lakes (> 20 km(2)) for the period 2000-2018. Results demonstrated that lake water depth spatially differentiated transparency. Deep lakes usually had high transparency and water depth explained 88.81 % of the spatial variations. With increasing catchment vegetation coverage and lake water depth, 70.15 % of lakes witnessed increasing transparency during 2000-2018. Of these 42.72 % were significant (p < 0.05). Transparency of deep lakes was generally determined by phytoplankton density not sediment resuspension. Minimum transparency occurred in summer. Future increases in lake water levels in response to factors such as climate change may contribute to further improvements in transparency. Management should focus on controlling eutrophication and increasing vegetation cover in catchments.
关键词	LONG-TERM MODIS INLAND WATERS LANDSAT IMAGERY CLIMATE-CHANGE SHALLOW LAKES CLARITY PHYTOPLANKTON CARBON RIVER RESUSPENSION
英文关键词	Water transparency; Chinese lakes; Spatio-temporal variation; Water depth; Vegetation restoration
语种	英语
WOS研究方向	Remote Sensing
WOS类目	Remote Sensing
WOS记录号	WOS:000550572100020
来源期刊	INTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION
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/260082
推荐引用方式 GB/T 7714	Liu, Dong,Duan, Hongtao,Loiselle, Steven,et al. Observations of water transparency in China's lakes from space[J]. 中国科学院青藏高原研究所,2020,92.
APA	Liu, Dong.,Duan, Hongtao.,Loiselle, Steven.,Hu, Chuanmin.,Zhang, Guoqing.,...&Han, Weixiao.(2020).Observations of water transparency in China's lakes from space.INTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION,92.
MLA	Liu, Dong,et al."Observations of water transparency in China's lakes from space".INTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION 92(2020).