Fluorescent dissolved organic matter in the dark ocean
2012 ASLO Aquatic Sciences Meeting: Voyages of Discovery, 8-13 July 2012, Lake Biwa, Shiga, Japan A dissolved organic matter (DOM) fraction absorbs ultraviolet and visible radiation that partially also emits fluorescence when irradiated with ultraviolet light. To identify the most relevant fluoropho...
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ftcsic:oai:digital.csic.es:10261/94711 2024-02-11T09:58:14+01:00 Fluorescent dissolved organic matter in the dark ocean Catalá, Teresa S. Reche, Isabel Fuentes-Lema, A. Romera-Castillo, Cristina Nieto-Cid, Mar Ortega-Retuerta, E. Álvarez, Marta Marrasé, Cèlia Stedmon, C. Álvarez-Salgado, Xosé Antón 2012-7-10 http://hdl.handle.net/10261/94711 unknown http://www.aslo.org/japan2012/index.html 2012 ASLO Aquatic Sciences Meeting - Meeting program: 142 (2012) http://hdl.handle.net/10261/94711 none póster de congreso http://purl.org/coar/resource_type/c_6670 2012 ftcsic 2024-01-16T09:57:48Z 2012 ASLO Aquatic Sciences Meeting: Voyages of Discovery, 8-13 July 2012, Lake Biwa, Shiga, Japan A dissolved organic matter (DOM) fraction absorbs ultraviolet and visible radiation that partially also emits fluorescence when irradiated with ultraviolet light. To identify the most relevant fluorophores present in deep waters, 429 excitation-emission matrixes (EEMs) from the bathypelagic layer of the Atlantic, Indian and Pacific oceans were recorded during the Malaspina 2010 circumnavigation. Parallel factor analysis (PARAFAC) modeling was applied and two humic-like fluorophores were identified in the dominant water masses of the deep world ocean: Antarctic Intermediate Water (AAIW), Circumpolar Deep Water (CDW), North Atlantic Deep Water (NADW) and Pacific Deep Water (PDW). Significant positive relationships were found between the humic-like fluorophores and AOU, suggesting the transformation of colorless bioavailable organic matter into chromophoric refractory DOM (RDOM) through microbial respiration. The RDOM/AOU ratio, a proxy to the efficiency of RDOM production, depended on the water mass. In the particular case of the NADW, terrestrial and in situ produced humic-like fluorophores were differentiated. These results will provide a basis for a better understanding of the role of microbial activity in the origin and fate of marine chromophoric dissolved organic matter Peer Reviewed Still Image Antarc* Antarctic NADW North Atlantic Deep Water North Atlantic Digital.CSIC (Spanish National Research Council) Antarctic Indian Pacific |
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Digital.CSIC (Spanish National Research Council) |
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2012 ASLO Aquatic Sciences Meeting: Voyages of Discovery, 8-13 July 2012, Lake Biwa, Shiga, Japan A dissolved organic matter (DOM) fraction absorbs ultraviolet and visible radiation that partially also emits fluorescence when irradiated with ultraviolet light. To identify the most relevant fluorophores present in deep waters, 429 excitation-emission matrixes (EEMs) from the bathypelagic layer of the Atlantic, Indian and Pacific oceans were recorded during the Malaspina 2010 circumnavigation. Parallel factor analysis (PARAFAC) modeling was applied and two humic-like fluorophores were identified in the dominant water masses of the deep world ocean: Antarctic Intermediate Water (AAIW), Circumpolar Deep Water (CDW), North Atlantic Deep Water (NADW) and Pacific Deep Water (PDW). Significant positive relationships were found between the humic-like fluorophores and AOU, suggesting the transformation of colorless bioavailable organic matter into chromophoric refractory DOM (RDOM) through microbial respiration. The RDOM/AOU ratio, a proxy to the efficiency of RDOM production, depended on the water mass. In the particular case of the NADW, terrestrial and in situ produced humic-like fluorophores were differentiated. These results will provide a basis for a better understanding of the role of microbial activity in the origin and fate of marine chromophoric dissolved organic matter Peer Reviewed |
format |
Still Image |
author |
Catalá, Teresa S. Reche, Isabel Fuentes-Lema, A. Romera-Castillo, Cristina Nieto-Cid, Mar Ortega-Retuerta, E. Álvarez, Marta Marrasé, Cèlia Stedmon, C. Álvarez-Salgado, Xosé Antón |
spellingShingle |
Catalá, Teresa S. Reche, Isabel Fuentes-Lema, A. Romera-Castillo, Cristina Nieto-Cid, Mar Ortega-Retuerta, E. Álvarez, Marta Marrasé, Cèlia Stedmon, C. Álvarez-Salgado, Xosé Antón Fluorescent dissolved organic matter in the dark ocean |
author_facet |
Catalá, Teresa S. Reche, Isabel Fuentes-Lema, A. Romera-Castillo, Cristina Nieto-Cid, Mar Ortega-Retuerta, E. Álvarez, Marta Marrasé, Cèlia Stedmon, C. Álvarez-Salgado, Xosé Antón |
author_sort |
Catalá, Teresa S. |
title |
Fluorescent dissolved organic matter in the dark ocean |
title_short |
Fluorescent dissolved organic matter in the dark ocean |
title_full |
Fluorescent dissolved organic matter in the dark ocean |
title_fullStr |
Fluorescent dissolved organic matter in the dark ocean |
title_full_unstemmed |
Fluorescent dissolved organic matter in the dark ocean |
title_sort |
fluorescent dissolved organic matter in the dark ocean |
publishDate |
2012 |
url |
http://hdl.handle.net/10261/94711 |
geographic |
Antarctic Indian Pacific |
geographic_facet |
Antarctic Indian Pacific |
genre |
Antarc* Antarctic NADW North Atlantic Deep Water North Atlantic |
genre_facet |
Antarc* Antarctic NADW North Atlantic Deep Water North Atlantic |
op_relation |
http://www.aslo.org/japan2012/index.html 2012 ASLO Aquatic Sciences Meeting - Meeting program: 142 (2012) http://hdl.handle.net/10261/94711 |
op_rights |
none |
_version_ |
1790593835015864320 |