{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,28]],"date-time":"2026-02-28T07:44:25Z","timestamp":1772264665788,"version":"3.50.1"},"reference-count":59,"publisher":"MDPI AG","issue":"8","license":[{"start":{"date-parts":[[2021,4,16]],"date-time":"2021-04-16T00:00:00Z","timestamp":1618531200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001664","name":"Leibniz-Gemeinschaft","doi-asserted-by":"publisher","award":["K45\/2017"],"award-info":[{"award-number":["K45\/2017"]}],"id":[{"id":"10.13039\/501100001664","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>Eutrophication of inland waters is an environmental issue that is becoming more common with climatic variability. Monitoring of this aquatic problem is commonly based on the chlorophyll-a concentration monitored by routine sampling with limited temporal and spatial coverage. Remote sensing data can be used to improve monitoring, especially after the launch of the MultiSpectral Instrument (MSI) on Sentinel-2. In this study, we compared the estimation of chlorophyll-a (chl-a) from different bio-optical algorithms using hyperspectral proximal remote sensing measurements, from simulated MSI responses and from an MSI image. For the satellite image, we also compare different atmospheric corrections routines before the comparison of different bio-optical algorithms. We used in situ data collected in 2019 from 97 sampling points across 19 different lakes. The atmospheric correction assessment showed that the performances of the routines varied for each spectral band. Therefore, we selected C2X, which performed best for bands 4 (root mean square error\u2014RMSE = 0.003), 5 (RMSE = 0.004) and 6 (RMSE = 0.002), which are usually used for the estimation of chl-a. Considering all samples from the 19 lakes, the best performing chl-a algorithm and calibration achieved a RMSE of 16.97 mg\/m3. When we consider only one lake chain composed of meso-to-eutrophic lakes, the performance improved (RMSE: 10.97 mg\/m3). This shows that for the studied meso-to-eutrophic waters, we can reliably estimate chl-a concentration, whereas for oligotrophic waters, further research is needed. The assessment of chl-a from space allows us to assess spatial dynamics of the environment, which can be important for the management of water resources. However, to have an accurate product, similar optical water types are important for the overall performance of the bio-optical algorithm.<\/jats:p>","DOI":"10.3390\/rs13081542","type":"journal-article","created":{"date-parts":[[2021,4,19]],"date-time":"2021-04-19T06:35:53Z","timestamp":1618814153000},"page":"1542","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":57,"title":["The Use of Sentinel-2 for Chlorophyll-a Spatial Dynamics Assessment: A Comparative Study on Different Lakes in Northern Germany"],"prefix":"10.3390","volume":"13","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6328-0001","authenticated-orcid":false,"given":"Igor","family":"Ogashawara","sequence":"first","affiliation":[{"name":"Department of Experimental Limnology, Leibniz Institute of Freshwater Ecology and Inland Fisheries, Zur alten Fischerhuette 2, 16775 Stechlin, Germany"}]},{"given":"Christine","family":"Kiel","sequence":"additional","affiliation":[{"name":"Department of Experimental Limnology, Leibniz Institute of Freshwater Ecology and Inland Fisheries, Zur alten Fischerhuette 2, 16775 Stechlin, Germany"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7596-6366","authenticated-orcid":false,"given":"Andreas","family":"Jechow","sequence":"additional","affiliation":[{"name":"Department of Ecohydrology, Leibniz Institute of Freshwater Ecology and Inland Fisheries, M\u00fcggelseedamm 310, 12587 Berlin, Germany"},{"name":"Remote Sensing and Geoinformatics, GFZ German Research Centre for Geosciences, Telegrafenberg, 14473 Potsdam, Germany"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7524-3806","authenticated-orcid":false,"given":"Katrin","family":"Kohnert","sequence":"additional","affiliation":[{"name":"Department of Experimental Limnology, Leibniz Institute of Freshwater Ecology and Inland Fisheries, Zur alten Fischerhuette 2, 16775 Stechlin, Germany"},{"name":"Remote Sensing and Geoinformatics, GFZ German Research Centre for Geosciences, Telegrafenberg, 14473 Potsdam, Germany"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4646-3791","authenticated-orcid":false,"given":"Thomas","family":"Ruhtz","sequence":"additional","affiliation":[{"name":"Institute for Space Sciences, Freie Universit\u00e4t Berlin, Carl-Heinrich-Becker Weg 6-10, 12165 Berlin, Germany"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9141-0325","authenticated-orcid":false,"given":"Hans-Peter","family":"Grossart","sequence":"additional","affiliation":[{"name":"Department of Experimental Limnology, Leibniz Institute of Freshwater Ecology and Inland Fisheries, Zur alten Fischerhuette 2, 16775 Stechlin, Germany"},{"name":"Faculty of Mathematics and Natural Sciences, Potsdam University, Maulbeerallee 2, 14469 Potsdam, Germany"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5932-266X","authenticated-orcid":false,"given":"Franz","family":"H\u00f6lker","sequence":"additional","affiliation":[{"name":"Department of Ecohydrology, Leibniz Institute of Freshwater Ecology and Inland Fisheries, M\u00fcggelseedamm 310, 12587 Berlin, Germany"}]},{"given":"Jens C.","family":"Nejstgaard","sequence":"additional","affiliation":[{"name":"Department of Experimental Limnology, Leibniz Institute of Freshwater Ecology and Inland Fisheries, Zur alten Fischerhuette 2, 16775 Stechlin, Germany"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8835-545X","authenticated-orcid":false,"given":"Stella A.","family":"Berger","sequence":"additional","affiliation":[{"name":"Department of Experimental Limnology, Leibniz Institute of Freshwater Ecology and Inland Fisheries, Zur alten Fischerhuette 2, 16775 Stechlin, Germany"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2430-4845","authenticated-orcid":false,"given":"Sabine","family":"Wollrab","sequence":"additional","affiliation":[{"name":"Department of Experimental Limnology, Leibniz Institute of Freshwater Ecology and Inland Fisheries, Zur alten Fischerhuette 2, 16775 Stechlin, Germany"}]}],"member":"1968","published-online":{"date-parts":[[2021,4,16]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"171","DOI":"10.1007\/s10021-006-9013-8","article-title":"Plumbing the Global Carbon Cycle: Integrating Inland Waters into the Terrestrial Carbon Budget","volume":"10","author":"Cole","year":"2007","journal-title":"Ecosystems"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"247","DOI":"10.1890\/070140","article-title":"Lakes and streams as sentinels of environmental change in terrestrial and atmospheric processes","volume":"6","author":"Williamson","year":"2008","journal-title":"Front. 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