Fluxes of soot black carbon to South Atlantic sediments
Deep sea sediment samples from the South Atlantic Ocean were analyzed for soot black carbon (BC), total organic carbon (TOC), stable carbon isotope ratios (delta C-13), and polycyclic aromatic hydrocarbons (PAHs). Soot BC was present at low concentrations (0.04-0.17% dry weight), but accounted for 3...
Published in: | Global Biogeochemical Cycles |
---|---|
Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2009
|
Subjects: | |
Online Access: | http://hdl.handle.net/21.11116/0000-000B-4E7B-5 http://hdl.handle.net/21.11116/0000-000B-4E7D-3 |
id |
ftpubman:oai:pure.mpg.de:item_3434630 |
---|---|
record_format |
openpolar |
spelling |
ftpubman:oai:pure.mpg.de:item_3434630 2023-08-27T04:11:59+02:00 Fluxes of soot black carbon to South Atlantic sediments Lohmann, R. Bollinger, K. Cantwell, M. Feichter, J. Fischer-Bruns, I. Zabel , M. 2009 application/pdf http://hdl.handle.net/21.11116/0000-000B-4E7B-5 http://hdl.handle.net/21.11116/0000-000B-4E7D-3 eng eng info:eu-repo/semantics/altIdentifier/doi/10.1029/2008GB003253 http://hdl.handle.net/21.11116/0000-000B-4E7B-5 http://hdl.handle.net/21.11116/0000-000B-4E7D-3 info:eu-repo/semantics/openAccess Global Biogeochemical Cycles info:eu-repo/semantics/article 2009 ftpubman https://doi.org/10.1029/2008GB003253 2023-08-02T01:19:57Z Deep sea sediment samples from the South Atlantic Ocean were analyzed for soot black carbon (BC), total organic carbon (TOC), stable carbon isotope ratios (delta C-13), and polycyclic aromatic hydrocarbons (PAHs). Soot BC was present at low concentrations (0.04-0.17% dry weight), but accounted for 3-35% of TOC. Fluxes of soot BC were calculated on the basis of known sedimentation rates and ranged from 0.5 to 7.8 mu g cm(-2) a(-1), with higher fluxes near Africa compared to South America. Values of delta C-13 indicated a marine origin for the organic carbon but terrestrial sources for the soot BC. PAH ratios implied a pyrogenic origin for most samples and possibly a predominance of traffic emissions over wood burning off the African coast. A coupled ocean-atmosphere-aerosol-climate model was used to determine fluxes of BC from 1860 to 2000 to the South Atlantic. Model simulation and measurements both yielded higher soot BC fluxes off the African coast and lower fluxes off the South American coast; however, measured sedimentary soot BC fluxes exceeded simulated values by similar to 1 mu g cm(-2) a(-1) on average (within a factor of 2-4). For the sediments off the African coast, soot BC delivery from the Congo River could possibly explain the higher flux rates, but no elevated soot BC fluxes were detected in the Amazon River basin. In total, fluxes of soot BC to the South Atlantic were similar to 480-700 Gg a(-1) in deep sea sediments. Our results suggest that attempts to construct a global mass balance of BC should include estimates of the atmospheric deposition of BC. Article in Journal/Newspaper South Atlantic Ocean Max Planck Society: MPG.PuRe Global Biogeochemical Cycles 23 1 n/a n/a |
institution |
Open Polar |
collection |
Max Planck Society: MPG.PuRe |
op_collection_id |
ftpubman |
language |
English |
description |
Deep sea sediment samples from the South Atlantic Ocean were analyzed for soot black carbon (BC), total organic carbon (TOC), stable carbon isotope ratios (delta C-13), and polycyclic aromatic hydrocarbons (PAHs). Soot BC was present at low concentrations (0.04-0.17% dry weight), but accounted for 3-35% of TOC. Fluxes of soot BC were calculated on the basis of known sedimentation rates and ranged from 0.5 to 7.8 mu g cm(-2) a(-1), with higher fluxes near Africa compared to South America. Values of delta C-13 indicated a marine origin for the organic carbon but terrestrial sources for the soot BC. PAH ratios implied a pyrogenic origin for most samples and possibly a predominance of traffic emissions over wood burning off the African coast. A coupled ocean-atmosphere-aerosol-climate model was used to determine fluxes of BC from 1860 to 2000 to the South Atlantic. Model simulation and measurements both yielded higher soot BC fluxes off the African coast and lower fluxes off the South American coast; however, measured sedimentary soot BC fluxes exceeded simulated values by similar to 1 mu g cm(-2) a(-1) on average (within a factor of 2-4). For the sediments off the African coast, soot BC delivery from the Congo River could possibly explain the higher flux rates, but no elevated soot BC fluxes were detected in the Amazon River basin. In total, fluxes of soot BC to the South Atlantic were similar to 480-700 Gg a(-1) in deep sea sediments. Our results suggest that attempts to construct a global mass balance of BC should include estimates of the atmospheric deposition of BC. |
format |
Article in Journal/Newspaper |
author |
Lohmann, R. Bollinger, K. Cantwell, M. Feichter, J. Fischer-Bruns, I. Zabel , M. |
spellingShingle |
Lohmann, R. Bollinger, K. Cantwell, M. Feichter, J. Fischer-Bruns, I. Zabel , M. Fluxes of soot black carbon to South Atlantic sediments |
author_facet |
Lohmann, R. Bollinger, K. Cantwell, M. Feichter, J. Fischer-Bruns, I. Zabel , M. |
author_sort |
Lohmann, R. |
title |
Fluxes of soot black carbon to South Atlantic sediments |
title_short |
Fluxes of soot black carbon to South Atlantic sediments |
title_full |
Fluxes of soot black carbon to South Atlantic sediments |
title_fullStr |
Fluxes of soot black carbon to South Atlantic sediments |
title_full_unstemmed |
Fluxes of soot black carbon to South Atlantic sediments |
title_sort |
fluxes of soot black carbon to south atlantic sediments |
publishDate |
2009 |
url |
http://hdl.handle.net/21.11116/0000-000B-4E7B-5 http://hdl.handle.net/21.11116/0000-000B-4E7D-3 |
genre |
South Atlantic Ocean |
genre_facet |
South Atlantic Ocean |
op_source |
Global Biogeochemical Cycles |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2008GB003253 http://hdl.handle.net/21.11116/0000-000B-4E7B-5 http://hdl.handle.net/21.11116/0000-000B-4E7D-3 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2008GB003253 |
container_title |
Global Biogeochemical Cycles |
container_volume |
23 |
container_issue |
1 |
container_start_page |
n/a |
op_container_end_page |
n/a |
_version_ |
1775355720057749504 |