(Table 1) Salinity and dissolved organic carbon concentration of marine water (ANT-XIX/2) and mangrove porewater (Brazil)
The chemical structure of refractory marine dissolved organic matter (DOM) is still largely unknown. Electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry (ESI FT-ICR-MS) was used to resolve the complex mixtures of DOM and provide valuable information on elemental compo...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.848469 2023-05-15T14:03:05+02:00 (Table 1) Salinity and dissolved organic carbon concentration of marine water (ANT-XIX/2) and mangrove porewater (Brazil) Koch, Boris P Witt, Matthias Engbrodt, Ralph Dittmar, Thorsten Kattner, Gerhard MEDIAN LATITUDE: -51.877075 * MEDIAN LONGITUDE: -31.695225 * SOUTH-BOUND LATITUDE: -69.003800 * WEST-BOUND LONGITUDE: -47.890000 * NORTH-BOUND LATITUDE: -0.899000 * EAST-BOUND LONGITUDE: -3.699500 * DATE/TIME START: 2001-12-28T11:00:00 * DATE/TIME END: 2002-01-05T18:58:00 * MINIMUM DEPTH, water: 30 m * MAXIMUM DEPTH, water: 4600 m 2005-07-24 text/tab-separated-values, 35 data points https://doi.pangaea.de/10.1594/PANGAEA.848469 https://doi.org/10.1594/PANGAEA.848469 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.848469 https://doi.org/10.1594/PANGAEA.848469 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Koch, Boris P; Witt, Matthias; Engbrodt, Ralph; Dittmar, Thorsten; Kattner, Gerhard (2005): Molecular formulae of marine and terrigenous dissolved organic matter detected by electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry. Geochimica et Cosmochimica Acta, 69(13), 3299-3308, https://doi.org/10.1016/j.gca.2005.02.027 ANT-XIX/2 AWI Caete_mangr Carbon organic dissolved CTD Seabird CTD-R Date/Time of event DEPTH water Equatorial West Atlantic Event label High temperature catalytic oxidation Latitude of event Longitude of event Percentage Polarstern Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas PS61 PS61/024-1 PS61/027-1 PS61/031-1 Salinity Sample type SPP1158 Station label Water sample Weddell Sea WS Dataset 2005 ftpangaea https://doi.org/10.1594/PANGAEA.848469 https://doi.org/10.1016/j.gca.2005.02.027 2023-01-20T09:06:12Z The chemical structure of refractory marine dissolved organic matter (DOM) is still largely unknown. Electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry (ESI FT-ICR-MS) was used to resolve the complex mixtures of DOM and provide valuable information on elemental compositions on a molecular scale. We characterized and compared DOM from two sharply contrasting aquatic environments, algal-derived DOM from the Weddell Sea (Antarctica) and terrigenous DOM from pore water of a tropical mangrove area in northern Brazil. Several thousand molecular formulas in the mass range of 300-600 Da were identified and reproduced in element ratio plots. On the basis of molecular elemental composition and double-bond equivalents (DBE) we calculated an average composition for marine DOM. O/C ratios in the marine samples were lower (0.36 ± 0.01) than in the mangrove pore-water sample (0.42). A small proportion of chemical formulas with higher molecular mass in the marine samples were characterized by very low O/C and H/C ratios probably reflecting amphiphilic properties. The average number of unsaturations in the marine samples was surprisingly high (DBE = 9.9; mangrove pore water: DBE = 9.4) most likely due to a significant contribution of carbonyl carbon. There was no significant difference in elemental composition between surface and deep-water DOM in the Weddell Sea. Although there were some molecules with unique marine elemental composition, there was a conspicuous degree of similarity between the terrigenous and algal-derived end members. Approximately one third of the molecular formulas were present in all marine as well as in the mangrove samples. We infer that different forms of microbial degradation ultimately lead to similar structural features that are intrinsically refractory, independent of the source of the organic matter and the environmental conditions where degradation took place. Dataset Antarc* Antarctic Antarctica Arctic Sea ice Weddell Sea PANGAEA - Data Publisher for Earth & Environmental Science Antarctic Arctic Weddell Weddell Sea ENVELOPE(-47.890000,-3.699500,-0.899000,-69.003800) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
ANT-XIX/2 AWI Caete_mangr Carbon organic dissolved CTD Seabird CTD-R Date/Time of event DEPTH water Equatorial West Atlantic Event label High temperature catalytic oxidation Latitude of event Longitude of event Percentage Polarstern Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas PS61 PS61/024-1 PS61/027-1 PS61/031-1 Salinity Sample type SPP1158 Station label Water sample Weddell Sea WS |
spellingShingle |
ANT-XIX/2 AWI Caete_mangr Carbon organic dissolved CTD Seabird CTD-R Date/Time of event DEPTH water Equatorial West Atlantic Event label High temperature catalytic oxidation Latitude of event Longitude of event Percentage Polarstern Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas PS61 PS61/024-1 PS61/027-1 PS61/031-1 Salinity Sample type SPP1158 Station label Water sample Weddell Sea WS Koch, Boris P Witt, Matthias Engbrodt, Ralph Dittmar, Thorsten Kattner, Gerhard (Table 1) Salinity and dissolved organic carbon concentration of marine water (ANT-XIX/2) and mangrove porewater (Brazil) |
topic_facet |
ANT-XIX/2 AWI Caete_mangr Carbon organic dissolved CTD Seabird CTD-R Date/Time of event DEPTH water Equatorial West Atlantic Event label High temperature catalytic oxidation Latitude of event Longitude of event Percentage Polarstern Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas PS61 PS61/024-1 PS61/027-1 PS61/031-1 Salinity Sample type SPP1158 Station label Water sample Weddell Sea WS |
description |
The chemical structure of refractory marine dissolved organic matter (DOM) is still largely unknown. Electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry (ESI FT-ICR-MS) was used to resolve the complex mixtures of DOM and provide valuable information on elemental compositions on a molecular scale. We characterized and compared DOM from two sharply contrasting aquatic environments, algal-derived DOM from the Weddell Sea (Antarctica) and terrigenous DOM from pore water of a tropical mangrove area in northern Brazil. Several thousand molecular formulas in the mass range of 300-600 Da were identified and reproduced in element ratio plots. On the basis of molecular elemental composition and double-bond equivalents (DBE) we calculated an average composition for marine DOM. O/C ratios in the marine samples were lower (0.36 ± 0.01) than in the mangrove pore-water sample (0.42). A small proportion of chemical formulas with higher molecular mass in the marine samples were characterized by very low O/C and H/C ratios probably reflecting amphiphilic properties. The average number of unsaturations in the marine samples was surprisingly high (DBE = 9.9; mangrove pore water: DBE = 9.4) most likely due to a significant contribution of carbonyl carbon. There was no significant difference in elemental composition between surface and deep-water DOM in the Weddell Sea. Although there were some molecules with unique marine elemental composition, there was a conspicuous degree of similarity between the terrigenous and algal-derived end members. Approximately one third of the molecular formulas were present in all marine as well as in the mangrove samples. We infer that different forms of microbial degradation ultimately lead to similar structural features that are intrinsically refractory, independent of the source of the organic matter and the environmental conditions where degradation took place. |
format |
Dataset |
author |
Koch, Boris P Witt, Matthias Engbrodt, Ralph Dittmar, Thorsten Kattner, Gerhard |
author_facet |
Koch, Boris P Witt, Matthias Engbrodt, Ralph Dittmar, Thorsten Kattner, Gerhard |
author_sort |
Koch, Boris P |
title |
(Table 1) Salinity and dissolved organic carbon concentration of marine water (ANT-XIX/2) and mangrove porewater (Brazil) |
title_short |
(Table 1) Salinity and dissolved organic carbon concentration of marine water (ANT-XIX/2) and mangrove porewater (Brazil) |
title_full |
(Table 1) Salinity and dissolved organic carbon concentration of marine water (ANT-XIX/2) and mangrove porewater (Brazil) |
title_fullStr |
(Table 1) Salinity and dissolved organic carbon concentration of marine water (ANT-XIX/2) and mangrove porewater (Brazil) |
title_full_unstemmed |
(Table 1) Salinity and dissolved organic carbon concentration of marine water (ANT-XIX/2) and mangrove porewater (Brazil) |
title_sort |
(table 1) salinity and dissolved organic carbon concentration of marine water (ant-xix/2) and mangrove porewater (brazil) |
publisher |
PANGAEA |
publishDate |
2005 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.848469 https://doi.org/10.1594/PANGAEA.848469 |
op_coverage |
MEDIAN LATITUDE: -51.877075 * MEDIAN LONGITUDE: -31.695225 * SOUTH-BOUND LATITUDE: -69.003800 * WEST-BOUND LONGITUDE: -47.890000 * NORTH-BOUND LATITUDE: -0.899000 * EAST-BOUND LONGITUDE: -3.699500 * DATE/TIME START: 2001-12-28T11:00:00 * DATE/TIME END: 2002-01-05T18:58:00 * MINIMUM DEPTH, water: 30 m * MAXIMUM DEPTH, water: 4600 m |
long_lat |
ENVELOPE(-47.890000,-3.699500,-0.899000,-69.003800) |
geographic |
Antarctic Arctic Weddell Weddell Sea |
geographic_facet |
Antarctic Arctic Weddell Weddell Sea |
genre |
Antarc* Antarctic Antarctica Arctic Sea ice Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctica Arctic Sea ice Weddell Sea |
op_source |
Supplement to: Koch, Boris P; Witt, Matthias; Engbrodt, Ralph; Dittmar, Thorsten; Kattner, Gerhard (2005): Molecular formulae of marine and terrigenous dissolved organic matter detected by electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry. Geochimica et Cosmochimica Acta, 69(13), 3299-3308, https://doi.org/10.1016/j.gca.2005.02.027 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.848469 https://doi.org/10.1594/PANGAEA.848469 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.848469 https://doi.org/10.1016/j.gca.2005.02.027 |
_version_ |
1766273586942705664 |