Characteristics of colored dissolved organic matter (CDOM) in the Western Arctic Ocean: Relationships with microbial activities
Special issue More from NASA’s ICESCAPE (Impacts of Climate on EcoSystems and Chemistry of the Arctic Pacific Environment) program, Part 1.-- 9 pages, 7 figures, 2 tables Colored dissolved organic matter (CDOM), a significant fraction of dissolved organic carbon (DOC), plays various roles in physica...
Published in: | Deep Sea Research Part II: Topical Studies in Oceanography |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
Pergamon Press
2015
|
Subjects: | |
Online Access: | http://hdl.handle.net/10261/122461 https://doi.org/10.1016/j.dsr2.2015.02.012 |
id |
ftcsic:oai:digital.csic.es:10261/122461 |
---|---|
record_format |
openpolar |
spelling |
ftcsic:oai:digital.csic.es:10261/122461 2024-02-11T10:00:34+01:00 Characteristics of colored dissolved organic matter (CDOM) in the Western Arctic Ocean: Relationships with microbial activities Matsuoka, A. Ortega-Retuerta, E. Bricaud, Annick Arrigo, Kevin R. Babin, Marcel 2015-08 http://hdl.handle.net/10261/122461 https://doi.org/10.1016/j.dsr2.2015.02.012 unknown Pergamon Press http://dx.doi.org/10.1016/j.dsr2.2015.02.012 Sí doi:10.1016/j.dsr2.2015.02.012 issn: 0967-0645 e-issn: 1879-0100 Deep-Sea Research Part II: Topical Studies in Oceanography 118(PartA): 44-52 (2015) http://hdl.handle.net/10261/122461 open Colored dissolved organic matter Microbial activity Western Arctic Ocean CDOM artículo http://purl.org/coar/resource_type/c_6501 2015 ftcsic https://doi.org/10.1016/j.dsr2.2015.02.012 2024-01-16T10:10:43Z Special issue More from NASA’s ICESCAPE (Impacts of Climate on EcoSystems and Chemistry of the Arctic Pacific Environment) program, Part 1.-- 9 pages, 7 figures, 2 tables Colored dissolved organic matter (CDOM), a significant fraction of dissolved organic carbon (DOC), plays various roles in physical and biogeochemical processes in natural waters. In the Arctic Ocean, CDOM is abundant because of major input by large rivers. To better understand the processes that drive variations in CDOM, light absorption coefficients of CDOM [aCDOM(λ), m-1] were extensively documented together with temperature, salinity, chlorophyll a, nitrate concentrations, and bacterial production (BP) and abundance (BA) in the Western Arctic Ocean (WAO) from early to late summer as part of the MALINA and the ICESCAPE expeditions. The data set covered contrasting situations, from bloom to post-bloom conditions and from river-influenced to oceanic water masses. While CDOM photobleaching occurred in the surface layer (<20m), we observed significantly lower spectral slopes for CDOM absorption spectra (SCDOM) in addition to higher aCDOM(440) in the layer below (intermediate layer: 30.7<salinity<33.9). In particular, the low SCDOM values were found in the Chukchi Sea and the western part of the Beaufort Sea, which coincided with high BP and BA values. Considering the high primary production observed in these areas during our cruises (Arrigo et al., 2012. Science. 10.1126/science.1215065), we hypothesize that SCDOM variations reflect the degradation of phytoplankton that is associated with heterotrophic bacterial activity. In our datasets, a simple regression analysis showed that SCDOM was significantly correlated with BP and BA. A principal component analysis further supported this conclusion. From our field observations, it was shown that variations in aCDOM(440) and SCDOM result to a large extent from bacterial activity, at least in the WAO. © 2015 Elsevier Ltd. This study was conducted as part of the MALINA Scientific Program ... Article in Journal/Newspaper Arctic Arctic Ocean Beaufort Sea Chukchi Chukchi Sea Phytoplankton Digital.CSIC (Spanish National Research Council) Arctic Arctic Ocean Chukchi Sea Pacific Deep Sea Research Part II: Topical Studies in Oceanography 118 44 52 |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
unknown |
topic |
Colored dissolved organic matter Microbial activity Western Arctic Ocean CDOM |
spellingShingle |
Colored dissolved organic matter Microbial activity Western Arctic Ocean CDOM Matsuoka, A. Ortega-Retuerta, E. Bricaud, Annick Arrigo, Kevin R. Babin, Marcel Characteristics of colored dissolved organic matter (CDOM) in the Western Arctic Ocean: Relationships with microbial activities |
topic_facet |
Colored dissolved organic matter Microbial activity Western Arctic Ocean CDOM |
description |
Special issue More from NASA’s ICESCAPE (Impacts of Climate on EcoSystems and Chemistry of the Arctic Pacific Environment) program, Part 1.-- 9 pages, 7 figures, 2 tables Colored dissolved organic matter (CDOM), a significant fraction of dissolved organic carbon (DOC), plays various roles in physical and biogeochemical processes in natural waters. In the Arctic Ocean, CDOM is abundant because of major input by large rivers. To better understand the processes that drive variations in CDOM, light absorption coefficients of CDOM [aCDOM(λ), m-1] were extensively documented together with temperature, salinity, chlorophyll a, nitrate concentrations, and bacterial production (BP) and abundance (BA) in the Western Arctic Ocean (WAO) from early to late summer as part of the MALINA and the ICESCAPE expeditions. The data set covered contrasting situations, from bloom to post-bloom conditions and from river-influenced to oceanic water masses. While CDOM photobleaching occurred in the surface layer (<20m), we observed significantly lower spectral slopes for CDOM absorption spectra (SCDOM) in addition to higher aCDOM(440) in the layer below (intermediate layer: 30.7<salinity<33.9). In particular, the low SCDOM values were found in the Chukchi Sea and the western part of the Beaufort Sea, which coincided with high BP and BA values. Considering the high primary production observed in these areas during our cruises (Arrigo et al., 2012. Science. 10.1126/science.1215065), we hypothesize that SCDOM variations reflect the degradation of phytoplankton that is associated with heterotrophic bacterial activity. In our datasets, a simple regression analysis showed that SCDOM was significantly correlated with BP and BA. A principal component analysis further supported this conclusion. From our field observations, it was shown that variations in aCDOM(440) and SCDOM result to a large extent from bacterial activity, at least in the WAO. © 2015 Elsevier Ltd. This study was conducted as part of the MALINA Scientific Program ... |
format |
Article in Journal/Newspaper |
author |
Matsuoka, A. Ortega-Retuerta, E. Bricaud, Annick Arrigo, Kevin R. Babin, Marcel |
author_facet |
Matsuoka, A. Ortega-Retuerta, E. Bricaud, Annick Arrigo, Kevin R. Babin, Marcel |
author_sort |
Matsuoka, A. |
title |
Characteristics of colored dissolved organic matter (CDOM) in the Western Arctic Ocean: Relationships with microbial activities |
title_short |
Characteristics of colored dissolved organic matter (CDOM) in the Western Arctic Ocean: Relationships with microbial activities |
title_full |
Characteristics of colored dissolved organic matter (CDOM) in the Western Arctic Ocean: Relationships with microbial activities |
title_fullStr |
Characteristics of colored dissolved organic matter (CDOM) in the Western Arctic Ocean: Relationships with microbial activities |
title_full_unstemmed |
Characteristics of colored dissolved organic matter (CDOM) in the Western Arctic Ocean: Relationships with microbial activities |
title_sort |
characteristics of colored dissolved organic matter (cdom) in the western arctic ocean: relationships with microbial activities |
publisher |
Pergamon Press |
publishDate |
2015 |
url |
http://hdl.handle.net/10261/122461 https://doi.org/10.1016/j.dsr2.2015.02.012 |
geographic |
Arctic Arctic Ocean Chukchi Sea Pacific |
geographic_facet |
Arctic Arctic Ocean Chukchi Sea Pacific |
genre |
Arctic Arctic Ocean Beaufort Sea Chukchi Chukchi Sea Phytoplankton |
genre_facet |
Arctic Arctic Ocean Beaufort Sea Chukchi Chukchi Sea Phytoplankton |
op_relation |
http://dx.doi.org/10.1016/j.dsr2.2015.02.012 Sí doi:10.1016/j.dsr2.2015.02.012 issn: 0967-0645 e-issn: 1879-0100 Deep-Sea Research Part II: Topical Studies in Oceanography 118(PartA): 44-52 (2015) http://hdl.handle.net/10261/122461 |
op_rights |
open |
op_doi |
https://doi.org/10.1016/j.dsr2.2015.02.012 |
container_title |
Deep Sea Research Part II: Topical Studies in Oceanography |
container_volume |
118 |
container_start_page |
44 |
op_container_end_page |
52 |
_version_ |
1790596279587307520 |