{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T04:03:00Z","timestamp":1760241780414,"version":"build-2065373602"},"reference-count":34,"publisher":"MDPI AG","issue":"9","license":[{"start":{"date-parts":[[2018,9,16]],"date-time":"2018-09-16T00:00:00Z","timestamp":1537056000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>This work focuses on the detection of tiny macroalgae patches in the eastern parts of the Yellow Sea (YS) using high-resolution Landsat-8 images from 2014 to 2017. In the comparison between floating algae index (FAI) and normalized difference vegetation index (NDVI) better detection by FAI was observed, but many tiny patches still remained undetected. By applying a modification on the FAI around 12% to 27% increased and correct detection of macroalgae is achieved from 35 images compared to the original. Through this method many scattered tiny patches were detected in June or July in Korea Bay and Gyeonggi Bay. Though it was a small-scale phenomenon they occurred in the similar period of macroalgal bloom occurrence in the YS. Thus, by using this modified method we could detect macroalgae in the study areas around one month earlier than the previously used Geostationary Ocean Color Imager NDVI-based detection. Later, more macroalgae patches including smaller ones occupying increased areas were detected. Thus, it seems that those macroalgae started growing locally from tiny patches rather than being transported from the western parts of the YS. Therefore, this modified FAI could be used for the precise detection of macroalgae.<\/jats:p>","DOI":"10.3390\/rs10091478","type":"journal-article","created":{"date-parts":[[2018,9,17]],"date-time":"2018-09-17T10:42:20Z","timestamp":1537180940000},"page":"1478","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":9,"title":["Improved Detection of Tiny Macroalgae Patches in Korea Bay and Gyeonggi Bay by Modification of Floating Algae Index"],"prefix":"10.3390","volume":"10","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4632-4062","authenticated-orcid":false,"given":"Ahmed","family":"Harun-Al-Rashid","sequence":"first","affiliation":[{"name":"Marine Security &amp; Safety Research Center, Korea Institute of Ocean Science &amp; Technology, Busan 49111, Korea"},{"name":"Integrated Ocean Sciences, University of Science &amp; Technology, Daejeon 34113, Korea"}]},{"given":"Chan-Su","family":"Yang","sequence":"additional","affiliation":[{"name":"Marine Security &amp; Safety Research Center, Korea Institute of Ocean Science &amp; Technology, Busan 49111, Korea"},{"name":"Integrated Ocean Sciences, University of Science &amp; Technology, Daejeon 34113, Korea"},{"name":"Department of Convergence Study on the Ocean Science and Technology, Ocean Science and Technology School, Korea Maritime and Ocean University, Busan 49111, Korea"}]}],"member":"1968","published-online":{"date-parts":[[2018,9,16]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"263","DOI":"10.1515\/BOT.2003.024","article-title":"Seasonal and spatial patterns of \u201cgreen tides\u201d (ulvoid algal blooms) and related water quality parameters in the coastal waters of Washington State, USA","volume":"46","author":"Nelson","year":"2003","journal-title":"Bot. 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