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DOI	10.1016/j.rse.2020.112058
	Coral-spawn slicks: Reflectance spectra and detection using optical satellite data
	Yamano H.; Sakuma A.; Harii S.
发表日期	2020
ISSN	00344257
卷号	251
英文摘要	This study provides the first report of reflectance spectra of coral-spawn slicks and their detection using optical satellite data. The reflectance spectra show that coral-spawn slicks can be discriminated from other sea-surface features such as wave foam and floating Sargassum. Analysis of Planet Dove and Sentinel-2B imagery allowed successful detection of coral-spawn slicks at Ishigaki Island, Okinawa, Japan (24°31′40″N, 124°17′31″E), by using reflectance values in the green and red wavelength regions. This detection was attributable to both their high spatial resolution (3.7 m and 10 m, respectively) and high temporal resolution (1 day and 5 days, respectively), given that coral spawning occurs within a short period (up to several days), typically once a year, and that the coral-spawn slicks have narrow widths of ~10 m. The number of the detected coral-spawn slicks was small, possibly because of coral decline around Ishigaki Island caused by the 2016 worldwide mass coral bleaching event. High-frequency satellite observations, including those from satellite constellations, should provide a powerful tool for understanding coral-reef processes and features whose detection requires high spatial and temporal resolution. © 2020 The Authors
英文关键词	Coral bundle; Coral mass spawning; Coral-spawn slick; Planet Dove; Satellite constellation; Sentinel-2
语种	英语
scopus关键词	Satellites; Surface waters; High spatial resolution; High temporal resolution; Optical satellites; Reflectance spectrum; Satellite constellations; Satellite observations; Sea surface features; Spatial and temporal resolutions; Reflection; coral bleaching; foam; image resolution; population decline; satellite data; spatial resolution; spawning population; spectral analysis; wavelength; wavelet analysis; Ishigaki; Japan; Okinawa [Ryukyu Islands]; Okinawa [Ryukyu Islands]; Ryukyu Islands; Sakishima Islands; Yaeyama Islands; Anthozoa; Sargassum
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/179132
作者单位	Center for Environmental Biology and Ecosystem Studies, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506, Japan; Graduate School of Systems and Information Engineering, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan; Sesoko Station, Tropical Biosphere Research Center, University of the Ryukyus, 3422 Sesoko, Motobu, Okinawa 905-0227, Japan
推荐引用方式 GB/T 7714	Yamano H.,Sakuma A.,Harii S.. Coral-spawn slicks: Reflectance spectra and detection using optical satellite data[J],2020,251.
APA	Yamano H.,Sakuma A.,&Harii S..(2020).Coral-spawn slicks: Reflectance spectra and detection using optical satellite data.Remote Sensing of Environment,251.
MLA	Yamano H.,et al."Coral-spawn slicks: Reflectance spectra and detection using optical satellite data".Remote Sensing of Environment 251(2020).