Part of the global DOC versus AOU (dissolved organic carbon/apparent oxygen utilization) data compilation, Southern Ocean, supplement to: Arístegui, Javier; Duarte, Carlos Manuel; Agustí, Susana; Doval, María Dolores; Alvarez-Salgado, Xose Anton; Hansell, Dennis A (2002): Dissolved organic carbon support of respiration in the dark ocean. Science, 298(5600), 1967
Recent evidence that dissolved organic carbon (DOC) is a significant component of the organic carbon flux below the photic layer of the ocean (1), together with verification of high respiration rates in the dark ocean (2), suggests that the downward flux of DOC may play a major role in supporting re...
Main Authors: | , , , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
PANGAEA - Data Publisher for Earth & Environmental Science
2002
|
Subjects: | |
Online Access: | https://dx.doi.org/10.1594/pangaea.807661 https://doi.pangaea.de/10.1594/PANGAEA.807661 |
id |
ftdatacite:10.1594/pangaea.807661 |
---|---|
record_format |
openpolar |
spelling |
ftdatacite:10.1594/pangaea.807661 2023-05-15T18:26:02+02:00 Part of the global DOC versus AOU (dissolved organic carbon/apparent oxygen utilization) data compilation, Southern Ocean, supplement to: Arístegui, Javier; Duarte, Carlos Manuel; Agustí, Susana; Doval, María Dolores; Alvarez-Salgado, Xose Anton; Hansell, Dennis A (2002): Dissolved organic carbon support of respiration in the dark ocean. Science, 298(5600), 1967 Arístegui, Javier Duarte, Carlos Manuel Agustí, Susana Doval, María Dolores Alvarez-Salgado, Xose Anton Hansell, Dennis A 2002 application/zip https://dx.doi.org/10.1594/pangaea.807661 https://doi.pangaea.de/10.1594/PANGAEA.807661 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.1126/science.1076746 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY Joint Global Ocean Flux Study JGOFS Collection article Supplementary Collection of Datasets 2002 ftdatacite https://doi.org/10.1594/pangaea.807661 https://doi.org/10.1126/science.1076746 2021-11-05T12:55:41Z Recent evidence that dissolved organic carbon (DOC) is a significant component of the organic carbon flux below the photic layer of the ocean (1), together with verification of high respiration rates in the dark ocean (2), suggests that the downward flux of DOC may play a major role in supporting respiration there. Here we show, on the basis of examination of the relation between DOC and apparent oxygen utilization (AOU), that the DOC flux supports ~10% of the respiration in the dark ocean.The contribution of DOC to pelagic respiration below the surface mixed layer can be inferred from the relation between DOC and apparent oxygen utilization (AOU, µM O2), a variable quantifying the cumulative oxygen consumption since a water parcel was last in contact with the atmosphere. However, assessments of DOC/AOU relations have been limited to specific regions of the ocean (3, 4) and have not considered the global ocean. We assembled a large data set (N = 9824) of concurrent DOC and AOU observations collected in cruises conducted throughout the world's oceans (fig. S1, table S1) to examine the relative contribution of DOC to AOU and, therefore, respiration in the dark ocean. AOU increased from an average (±SE) 96.3 ± 2.0 µM at the base of the surface mixed layer (100 m) to 165.5 ± 4.3 µM at the bottom of the main thermocline (1000 m), with a parallel decline in the average DOC from 53.5 ± 0.2 to 43.4 ± 0.3 µM C (Fig. 1). In contrast, there is no significant decline in DOC with increasing depth beyond 1000 m depth (Fig. 1), indicating that DOC exported with overturning circulation plays a minor role in supporting respiration in the ocean interior (5). Assuming a molar respiratory quotient of 0.69, the decline in DOC accounts for 19.6 ± 0.4% of the AOU within the top 1000 m (Fig. 1). This estimate represents, however, an upper limit, because the correlation between DOC and AOU is partly due to mixing of DOC-rich warm surface waters with DOC-poor cold thermocline waters (6). Removal of this effect by regressing DOC against AOU and water temperature indicates that DOC supports only 8.4 ± 0.3% of the respiration in the mesopelagic waters. Article in Journal/Newspaper Southern Ocean DataCite Metadata Store (German National Library of Science and Technology) Southern Ocean Alvarez ENVELOPE(-64.483,-64.483,-65.633,-65.633) Dolores ENVELOPE(-58.433,-58.433,-62.233,-62.233) Duarte ENVELOPE(-60.950,-60.950,-64.200,-64.200) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Joint Global Ocean Flux Study JGOFS |
spellingShingle |
Joint Global Ocean Flux Study JGOFS Arístegui, Javier Duarte, Carlos Manuel Agustí, Susana Doval, María Dolores Alvarez-Salgado, Xose Anton Hansell, Dennis A Part of the global DOC versus AOU (dissolved organic carbon/apparent oxygen utilization) data compilation, Southern Ocean, supplement to: Arístegui, Javier; Duarte, Carlos Manuel; Agustí, Susana; Doval, María Dolores; Alvarez-Salgado, Xose Anton; Hansell, Dennis A (2002): Dissolved organic carbon support of respiration in the dark ocean. Science, 298(5600), 1967 |
topic_facet |
Joint Global Ocean Flux Study JGOFS |
description |
Recent evidence that dissolved organic carbon (DOC) is a significant component of the organic carbon flux below the photic layer of the ocean (1), together with verification of high respiration rates in the dark ocean (2), suggests that the downward flux of DOC may play a major role in supporting respiration there. Here we show, on the basis of examination of the relation between DOC and apparent oxygen utilization (AOU), that the DOC flux supports ~10% of the respiration in the dark ocean.The contribution of DOC to pelagic respiration below the surface mixed layer can be inferred from the relation between DOC and apparent oxygen utilization (AOU, µM O2), a variable quantifying the cumulative oxygen consumption since a water parcel was last in contact with the atmosphere. However, assessments of DOC/AOU relations have been limited to specific regions of the ocean (3, 4) and have not considered the global ocean. We assembled a large data set (N = 9824) of concurrent DOC and AOU observations collected in cruises conducted throughout the world's oceans (fig. S1, table S1) to examine the relative contribution of DOC to AOU and, therefore, respiration in the dark ocean. AOU increased from an average (±SE) 96.3 ± 2.0 µM at the base of the surface mixed layer (100 m) to 165.5 ± 4.3 µM at the bottom of the main thermocline (1000 m), with a parallel decline in the average DOC from 53.5 ± 0.2 to 43.4 ± 0.3 µM C (Fig. 1). In contrast, there is no significant decline in DOC with increasing depth beyond 1000 m depth (Fig. 1), indicating that DOC exported with overturning circulation plays a minor role in supporting respiration in the ocean interior (5). Assuming a molar respiratory quotient of 0.69, the decline in DOC accounts for 19.6 ± 0.4% of the AOU within the top 1000 m (Fig. 1). This estimate represents, however, an upper limit, because the correlation between DOC and AOU is partly due to mixing of DOC-rich warm surface waters with DOC-poor cold thermocline waters (6). Removal of this effect by regressing DOC against AOU and water temperature indicates that DOC supports only 8.4 ± 0.3% of the respiration in the mesopelagic waters. |
format |
Article in Journal/Newspaper |
author |
Arístegui, Javier Duarte, Carlos Manuel Agustí, Susana Doval, María Dolores Alvarez-Salgado, Xose Anton Hansell, Dennis A |
author_facet |
Arístegui, Javier Duarte, Carlos Manuel Agustí, Susana Doval, María Dolores Alvarez-Salgado, Xose Anton Hansell, Dennis A |
author_sort |
Arístegui, Javier |
title |
Part of the global DOC versus AOU (dissolved organic carbon/apparent oxygen utilization) data compilation, Southern Ocean, supplement to: Arístegui, Javier; Duarte, Carlos Manuel; Agustí, Susana; Doval, María Dolores; Alvarez-Salgado, Xose Anton; Hansell, Dennis A (2002): Dissolved organic carbon support of respiration in the dark ocean. Science, 298(5600), 1967 |
title_short |
Part of the global DOC versus AOU (dissolved organic carbon/apparent oxygen utilization) data compilation, Southern Ocean, supplement to: Arístegui, Javier; Duarte, Carlos Manuel; Agustí, Susana; Doval, María Dolores; Alvarez-Salgado, Xose Anton; Hansell, Dennis A (2002): Dissolved organic carbon support of respiration in the dark ocean. Science, 298(5600), 1967 |
title_full |
Part of the global DOC versus AOU (dissolved organic carbon/apparent oxygen utilization) data compilation, Southern Ocean, supplement to: Arístegui, Javier; Duarte, Carlos Manuel; Agustí, Susana; Doval, María Dolores; Alvarez-Salgado, Xose Anton; Hansell, Dennis A (2002): Dissolved organic carbon support of respiration in the dark ocean. Science, 298(5600), 1967 |
title_fullStr |
Part of the global DOC versus AOU (dissolved organic carbon/apparent oxygen utilization) data compilation, Southern Ocean, supplement to: Arístegui, Javier; Duarte, Carlos Manuel; Agustí, Susana; Doval, María Dolores; Alvarez-Salgado, Xose Anton; Hansell, Dennis A (2002): Dissolved organic carbon support of respiration in the dark ocean. Science, 298(5600), 1967 |
title_full_unstemmed |
Part of the global DOC versus AOU (dissolved organic carbon/apparent oxygen utilization) data compilation, Southern Ocean, supplement to: Arístegui, Javier; Duarte, Carlos Manuel; Agustí, Susana; Doval, María Dolores; Alvarez-Salgado, Xose Anton; Hansell, Dennis A (2002): Dissolved organic carbon support of respiration in the dark ocean. Science, 298(5600), 1967 |
title_sort |
part of the global doc versus aou (dissolved organic carbon/apparent oxygen utilization) data compilation, southern ocean, supplement to: arístegui, javier; duarte, carlos manuel; agustí, susana; doval, maría dolores; alvarez-salgado, xose anton; hansell, dennis a (2002): dissolved organic carbon support of respiration in the dark ocean. science, 298(5600), 1967 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
2002 |
url |
https://dx.doi.org/10.1594/pangaea.807661 https://doi.pangaea.de/10.1594/PANGAEA.807661 |
long_lat |
ENVELOPE(-64.483,-64.483,-65.633,-65.633) ENVELOPE(-58.433,-58.433,-62.233,-62.233) ENVELOPE(-60.950,-60.950,-64.200,-64.200) |
geographic |
Southern Ocean Alvarez Dolores Duarte |
geographic_facet |
Southern Ocean Alvarez Dolores Duarte |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_relation |
https://dx.doi.org/10.1126/science.1076746 |
op_rights |
Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/pangaea.807661 https://doi.org/10.1126/science.1076746 |
_version_ |
1766207853378404352 |