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Mapping Lake CDOM [coloured dissolved organic matter] by satellite remote sensing / T. Kuster in Remote sensing of environment, vol 94 n° 4 (28/02/2005)  

Public [article]  inRemote sensing of environment > vol 94 n° 4 (28/02/2005) . - pp 535 - 540 Titre : Mapping Lake CDOM [coloured dissolved organic matter] by satellite remote sensing Type de document : Article/Communication Auteurs : T. Kuster, Auteur ; D.C. Pierson, Auteur ; et al., Auteur Année de publication : 2005 Article en page(s) : pp 535 - 540 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes IGN] algorithmique [Termes IGN] analyse comparative [Termes IGN] analyse multibande [Termes IGN] cartographie thématique [Termes IGN] écosystème [Termes IGN] Finlande [Termes IGN] image EO1-ALI [Termes IGN] lac [Termes IGN] matière organique [Termes IGN] réalité de terrain [Termes IGN] Suède Résumé : (Auteur) Given the importance of coloured dissolved organic matter (CDOM) for the structure and function of lake ecosystems, a method to estimate the amount of CDOM in lake waters over large geographic areas would be highly desirable. Advanced Land Imager (ALI) images were acquired in southern Finland (in 2002) and southern Sweden (in 2003) together with in situ. measurements of bio-optical properties of 34 lakes (39 measuring stations). Based on this dataset, a band-ratio type algorithm was developed using ALI band 2 and band 3 for estimating CDOM content (absorption of filtrated water at 420 nm) in lakes. Correlation between in situ measured CDOM and the remote sensing estimate of CDOM was high, r2=0 .73. The CDOM retrieval algorithm obtained on the basis of two images and in situ data was validated on a third ALI image (eastern Finland, 2002) that was available in the ALI image archive. In situ water-colour monitoring data from 22 lakes (27 measuring stations) in the third image were available in a database of the Finnish Environment Administration. The water-colour data were converted to CDOM absorption values, which were then compared to the results from a third ALI image. The correlation between remotely estimated and in situ CDOM values in the algorithm validation image was high, r2=0 .83. These results support the conclusion that CDOM content in lakes over a wide range of concentrations (aCDOM(420) between 0.68 and 11.13 m-1) can be mapped using Advanced Land Imager data. Numéro de notice : A2005-070 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.rse.2004.11.009 En ligne : https://doi.org/10.1016/j.rse.2004.11.009 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27208 [article]