Thermogenic organic matter dissolved in the abyssal ocean
Formation and decay of thermogenic organic matter are important processes in the geological carbon cycle, but little is known about the fate of combustion-derived and petrogenic compounds in the ocean. We explored the molecular structure of marinedissolved organic matter (DOM) for thermogenic signat...
Published in: | Marine Chemistry |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
2006
|
Subjects: | |
Online Access: | https://epic.awi.de/id/eprint/13465/ https://doi.org/10.1016/j.marchem.2006.04.003 https://hdl.handle.net/10013/epic.23847 |
id |
ftawi:oai:epic.awi.de:13465 |
---|---|
record_format |
openpolar |
spelling |
ftawi:oai:epic.awi.de:13465 2023-09-05T13:23:30+02:00 Thermogenic organic matter dissolved in the abyssal ocean Dittmar, T. Koch, Boris 2006 https://epic.awi.de/id/eprint/13465/ https://doi.org/10.1016/j.marchem.2006.04.003 https://hdl.handle.net/10013/epic.23847 unknown Dittmar, T. and Koch, B. orcid:0000-0002-8453-731X (2006) Thermogenic organic matter dissolved in the abyssal ocean , Marine Chemistry, 102 (3), pp. 208-217 . doi:10.1016/j.marchem.2006.04.003 <https://doi.org/10.1016/j.marchem.2006.04.003> , hdl:10013/epic.23847 EPIC3Marine Chemistry, 102(3), pp. 208-217 Article isiRev 2006 ftawi https://doi.org/10.1016/j.marchem.2006.04.003 2023-08-22T19:50:34Z Formation and decay of thermogenic organic matter are important processes in the geological carbon cycle, but little is known about the fate of combustion-derived and petrogenic compounds in the ocean. We explored the molecular structure of marinedissolved organic matter (DOM) for thermogenic signatures in different water masses of the Southern Ocean. Ultrahigh-resolution mass spectrometry via the Fourier transform-ion cyclotron resonance technique (FT-ICR-MS) revealed the presence of polyaromatic hydrocarbons (PAHs) dissolved in the abyssal ocean. More than 200 different PAHs were discerned, most of themconsisting of seven condensed rings with varying numbers of carboxyl, hydroxyl, and aliphatic functional groups. These unambiguously thermogenic compounds were homogenously distributed in the deep sea, but depleted at the sea surface. Based on the structural information alone, petrogenic and pyrogenic compounds cannot be distinguished. Surface depletion of the PAHs and first estimates for their turnover rate (>1.2 ·10^12 mol C per year) point toward a primarily petrogenic source, possibly deep-seahydrothermal vents, which is thus far speculative because the fluxes of combustion-derived and petrogenic matter to the ocean are not well constrained. We estimate that >2.4% of DOM are thermogenic compounds, and their global inventory in the oceans is >1.4 ·10^15 mol C, significantly impacting global biogeochemical cycles. Article in Journal/Newspaper Southern Ocean Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Southern Ocean Marine Chemistry 102 3-4 208 217 |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
Formation and decay of thermogenic organic matter are important processes in the geological carbon cycle, but little is known about the fate of combustion-derived and petrogenic compounds in the ocean. We explored the molecular structure of marinedissolved organic matter (DOM) for thermogenic signatures in different water masses of the Southern Ocean. Ultrahigh-resolution mass spectrometry via the Fourier transform-ion cyclotron resonance technique (FT-ICR-MS) revealed the presence of polyaromatic hydrocarbons (PAHs) dissolved in the abyssal ocean. More than 200 different PAHs were discerned, most of themconsisting of seven condensed rings with varying numbers of carboxyl, hydroxyl, and aliphatic functional groups. These unambiguously thermogenic compounds were homogenously distributed in the deep sea, but depleted at the sea surface. Based on the structural information alone, petrogenic and pyrogenic compounds cannot be distinguished. Surface depletion of the PAHs and first estimates for their turnover rate (>1.2 ·10^12 mol C per year) point toward a primarily petrogenic source, possibly deep-seahydrothermal vents, which is thus far speculative because the fluxes of combustion-derived and petrogenic matter to the ocean are not well constrained. We estimate that >2.4% of DOM are thermogenic compounds, and their global inventory in the oceans is >1.4 ·10^15 mol C, significantly impacting global biogeochemical cycles. |
format |
Article in Journal/Newspaper |
author |
Dittmar, T. Koch, Boris |
spellingShingle |
Dittmar, T. Koch, Boris Thermogenic organic matter dissolved in the abyssal ocean |
author_facet |
Dittmar, T. Koch, Boris |
author_sort |
Dittmar, T. |
title |
Thermogenic organic matter dissolved in the abyssal ocean |
title_short |
Thermogenic organic matter dissolved in the abyssal ocean |
title_full |
Thermogenic organic matter dissolved in the abyssal ocean |
title_fullStr |
Thermogenic organic matter dissolved in the abyssal ocean |
title_full_unstemmed |
Thermogenic organic matter dissolved in the abyssal ocean |
title_sort |
thermogenic organic matter dissolved in the abyssal ocean |
publishDate |
2006 |
url |
https://epic.awi.de/id/eprint/13465/ https://doi.org/10.1016/j.marchem.2006.04.003 https://hdl.handle.net/10013/epic.23847 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
EPIC3Marine Chemistry, 102(3), pp. 208-217 |
op_relation |
Dittmar, T. and Koch, B. orcid:0000-0002-8453-731X (2006) Thermogenic organic matter dissolved in the abyssal ocean , Marine Chemistry, 102 (3), pp. 208-217 . doi:10.1016/j.marchem.2006.04.003 <https://doi.org/10.1016/j.marchem.2006.04.003> , hdl:10013/epic.23847 |
op_doi |
https://doi.org/10.1016/j.marchem.2006.04.003 |
container_title |
Marine Chemistry |
container_volume |
102 |
container_issue |
3-4 |
container_start_page |
208 |
op_container_end_page |
217 |
_version_ |
1776204094502862848 |