Regional and temporal variability of sinking organic matter in the subtropical northeast Atlantic Ocean: a biomarker diagnosis
Sinking particles through the pelagic ocean have been traditionally considered the most\nimportant vehicle by which the biological pump sequesters carbon in the ocean interior.\nNevertheless, regional scale variability in particle flux is a major outstanding issue in\noceanography. 5 Here, we have s...
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ftunivlaspalmas:oai:https://accedacris.ulpgc.es:10553/2945 2023-05-15T17:41:41+02:00 Regional and temporal variability of sinking organic matter in the subtropical northeast Atlantic Ocean: a biomarker diagnosis Alonso-González, Iván J. Aristegui, J. Lee, Cindy Calafat, Antoni Aristegui, Javier Calafat, Antoni Lee, Cindy 2018-02-21T14:20:16Z http://hdl.handle.net/10553/2945 https://doi.org/10.5194/bg-7-2101-2010 eng eng Biogeosciences 1726-4170 http://hdl.handle.net/10553/2945 doi:10.5194/bg-7-2101-2010 000280515300005 585036 -;2728;-;- 2115 7 WOS:000280515300005 D-5833-2013 J-5848-2017 B-1456-2009 Biogeosiences discussions. Katlenburg-Lindau: Copernicus, 2009. ISSN 1810-6277. Vol. 6, p 11089-11126 251001 Oceanografía biológica Sediment traps Carbon flux Biomarkers Canary region info:eu-repo/semantics/bookPart 2018 ftunivlaspalmas https://doi.org/10.5194/bg-7-2101-2010 2019-09-08T15:46:32Z Sinking particles through the pelagic ocean have been traditionally considered the most\nimportant vehicle by which the biological pump sequesters carbon in the ocean interior.\nNevertheless, regional scale variability in particle flux is a major outstanding issue in\noceanography. 5 Here, we have studied the regional and temporal variability of total particulate\norganic matter fluxes, as well as chloropigment and total hydrolyzed amino acid\n(THAA) compositions and fluxes in the Canary Current region, between 20–30 N, during\ntwo contrasting periods: August 2006, characterized by warm and stratified waters,\nbut also intense winds which enhanced eddy development south of the Canary Islands,\n10 and February 2007, characterized by colder waters, less stratification and higher productivity.\nWe found that the eddy-field generated south of the Canary Islands enhanced\nby >2 times particulate organic carbon (POC) export with respect to stations (FF; farfield)\noutside the eddy-field influence. We also observed flux increases of one order of\nmagnitude in chloropigment and 70% in THAA in the eddy-field relative to FF stations.\n15 Principal Components Analysis (PCA) was performed to assess changes in particulate\norganic matter composition between stations. At eddy-field stations, higher chlorophyll\nenrichment reflected “fresher” material, while at FF stations a higher proportion of\npheophytin indicated greater degradation due to microbes and microzooplankton. PCA\nalso suggests that phytoplankton community structure, particularly the dominance of\n20 diatoms versus carbonate-rich plankton, is the major factor influencing the POC export\nwithin the eddy field. In February, POC export fluxes were the highest ever reported\nfor this area, reaching values of 15 mmolCm−2 d−1 at 200m depth. Compositional\nchanges in pigments and THAA indicate that the source of sinking particles varies\nzonally and meridionally and suggest that sinking particles were more degraded at\n25 near-coastal stations relative to open ocean stations. Book Part Northeast Atlantic Universidad de Las Palmas de Gran Canaria: Acceda Biogeosciences 7 7 2101 2115 |
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Open Polar |
collection |
Universidad de Las Palmas de Gran Canaria: Acceda |
op_collection_id |
ftunivlaspalmas |
language |
English |
topic |
251001 Oceanografía biológica Sediment traps Carbon flux Biomarkers Canary region |
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251001 Oceanografía biológica Sediment traps Carbon flux Biomarkers Canary region Alonso-González, Iván J. Aristegui, J. Lee, Cindy Calafat, Antoni Regional and temporal variability of sinking organic matter in the subtropical northeast Atlantic Ocean: a biomarker diagnosis |
topic_facet |
251001 Oceanografía biológica Sediment traps Carbon flux Biomarkers Canary region |
description |
Sinking particles through the pelagic ocean have been traditionally considered the most\nimportant vehicle by which the biological pump sequesters carbon in the ocean interior.\nNevertheless, regional scale variability in particle flux is a major outstanding issue in\noceanography. 5 Here, we have studied the regional and temporal variability of total particulate\norganic matter fluxes, as well as chloropigment and total hydrolyzed amino acid\n(THAA) compositions and fluxes in the Canary Current region, between 20–30 N, during\ntwo contrasting periods: August 2006, characterized by warm and stratified waters,\nbut also intense winds which enhanced eddy development south of the Canary Islands,\n10 and February 2007, characterized by colder waters, less stratification and higher productivity.\nWe found that the eddy-field generated south of the Canary Islands enhanced\nby >2 times particulate organic carbon (POC) export with respect to stations (FF; farfield)\noutside the eddy-field influence. We also observed flux increases of one order of\nmagnitude in chloropigment and 70% in THAA in the eddy-field relative to FF stations.\n15 Principal Components Analysis (PCA) was performed to assess changes in particulate\norganic matter composition between stations. At eddy-field stations, higher chlorophyll\nenrichment reflected “fresher” material, while at FF stations a higher proportion of\npheophytin indicated greater degradation due to microbes and microzooplankton. PCA\nalso suggests that phytoplankton community structure, particularly the dominance of\n20 diatoms versus carbonate-rich plankton, is the major factor influencing the POC export\nwithin the eddy field. In February, POC export fluxes were the highest ever reported\nfor this area, reaching values of 15 mmolCm−2 d−1 at 200m depth. Compositional\nchanges in pigments and THAA indicate that the source of sinking particles varies\nzonally and meridionally and suggest that sinking particles were more degraded at\n25 near-coastal stations relative to open ocean stations. |
author2 |
Aristegui, Javier Calafat, Antoni Lee, Cindy |
format |
Book Part |
author |
Alonso-González, Iván J. Aristegui, J. Lee, Cindy Calafat, Antoni |
author_facet |
Alonso-González, Iván J. Aristegui, J. Lee, Cindy Calafat, Antoni |
author_sort |
Alonso-González, Iván J. |
title |
Regional and temporal variability of sinking organic matter in the subtropical northeast Atlantic Ocean: a biomarker diagnosis |
title_short |
Regional and temporal variability of sinking organic matter in the subtropical northeast Atlantic Ocean: a biomarker diagnosis |
title_full |
Regional and temporal variability of sinking organic matter in the subtropical northeast Atlantic Ocean: a biomarker diagnosis |
title_fullStr |
Regional and temporal variability of sinking organic matter in the subtropical northeast Atlantic Ocean: a biomarker diagnosis |
title_full_unstemmed |
Regional and temporal variability of sinking organic matter in the subtropical northeast Atlantic Ocean: a biomarker diagnosis |
title_sort |
regional and temporal variability of sinking organic matter in the subtropical northeast atlantic ocean: a biomarker diagnosis |
publishDate |
2018 |
url |
http://hdl.handle.net/10553/2945 https://doi.org/10.5194/bg-7-2101-2010 |
genre |
Northeast Atlantic |
genre_facet |
Northeast Atlantic |
op_source |
Biogeosiences discussions. Katlenburg-Lindau: Copernicus, 2009. ISSN 1810-6277. Vol. 6, p 11089-11126 |
op_relation |
Biogeosciences 1726-4170 http://hdl.handle.net/10553/2945 doi:10.5194/bg-7-2101-2010 000280515300005 585036 -;2728;-;- 2115 7 WOS:000280515300005 D-5833-2013 J-5848-2017 B-1456-2009 |
op_doi |
https://doi.org/10.5194/bg-7-2101-2010 |
container_title |
Biogeosciences |
container_volume |
7 |
container_issue |
7 |
container_start_page |
2101 |
op_container_end_page |
2115 |
_version_ |
1766143377403805696 |