Concentrations of organic carbon, nitrogen and phosphorus on vertical profiles in waters of the tropical North Atlantic in March 2002 ...
In the literature, an inconsistency exists between estimates of biotically-effected carbon export inferred from large-scale geochemical studies (Jenkins 1982; 47 gC m–2 a–1) and local measurements of turbulent nutrient supply (Lewis et al. 1986; 4 gC m–2 a–1) in the eastern subtropical North Atlanti...
Main Authors: | , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
PANGAEA
2008
|
Subjects: | |
Online Access: | https://dx.doi.org/10.1594/pangaea.696302 https://doi.pangaea.de/10.1594/PANGAEA.696302 |
id |
ftdatacite:10.1594/pangaea.696302 |
---|---|
record_format |
openpolar |
spelling |
ftdatacite:10.1594/pangaea.696302 2024-09-30T14:39:31+00:00 Concentrations of organic carbon, nitrogen and phosphorus on vertical profiles in waters of the tropical North Atlantic in March 2002 ... Dietze, Heiner Oschlies, Andreas Kähler, Paul 2008 application/zip https://dx.doi.org/10.1594/pangaea.696302 https://doi.pangaea.de/10.1594/PANGAEA.696302 en eng PANGAEA https://dx.doi.org/10.1007/s10236-003-0060-9 https://dx.doi.org/10.1029/2003gl018552 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 Bottle, Niskin 10-L POS284 Poseidon Collection Supplementary Publication Series of Datasets article 2008 ftdatacite https://doi.org/10.1594/pangaea.69630210.1007/s10236-003-0060-910.1029/2003gl018552 2024-09-02T08:36:09Z In the literature, an inconsistency exists between estimates of biotically-effected carbon export inferred from large-scale geochemical studies (Jenkins 1982; 47 gC m–2 a–1) and local measurements of turbulent nutrient supply (Lewis et al. 1986; 4 gC m–2 a–1) in the eastern subtropical North Atlantic. Nutrient supply to the upper ocean by turbulent mixing is reexamined using local standard oceanographic measurements and high-resolution vertical profiles of nutrients averaged over a large region directly comparable to that investigated by Jenkins (1982).Turbulent fluxes induced by internal waves and salt fingering, respectively, are separated according to Gregg (1989) and Zhang et al. (1998). Nutrient transport into the nutrient-consuming surface layer by salt fingering is more than fivefold higher than transport due to internal-wave induced turbulence. Still, this cannot resolve the above- mentioned apparent inconsistency, even if additional physical transport mechanisms such as eddy pumping, advection and ... : Not filtered water samples were taken in 10 ml ampoules (sealed immediately after being acidified with phosphoric acid to pH<2, sampling), or 40 ml screw-lid vials, and measured onboard at sampling or next days, or frozen (-20°C) until being acidified and measured in home labs.Carbon measurement was by high-temperature catalytic oxydation in a 10 cm column packed with 5% Pt on aluminum oxide beads at 900°C in a stream of oxygen, and CO2 detection by infrared extinction after the removal of moisture and SO2 by appropriate traps (cold trap, Mg-percarbonate, Na-pyrophosphate, tin, bronze or Sulfix). The apparatus was the dual channel Dimatek 2000 equipped with a Binos 200 detector.Nitrogen was measured by chemoluminescence detection of NO2 in the combustion gases after leaving the Binos detector in one of the two channels of the setup. Most measurements of samples containing high nitrate were discarded, when data were inconsistent. The nature of nitrate interference is not clear. ... Article in Journal/Newspaper North Atlantic DataCite |
institution |
Open Polar |
collection |
DataCite |
op_collection_id |
ftdatacite |
language |
English |
topic |
Bottle, Niskin 10-L POS284 Poseidon |
spellingShingle |
Bottle, Niskin 10-L POS284 Poseidon Dietze, Heiner Oschlies, Andreas Kähler, Paul Concentrations of organic carbon, nitrogen and phosphorus on vertical profiles in waters of the tropical North Atlantic in March 2002 ... |
topic_facet |
Bottle, Niskin 10-L POS284 Poseidon |
description |
In the literature, an inconsistency exists between estimates of biotically-effected carbon export inferred from large-scale geochemical studies (Jenkins 1982; 47 gC m–2 a–1) and local measurements of turbulent nutrient supply (Lewis et al. 1986; 4 gC m–2 a–1) in the eastern subtropical North Atlantic. Nutrient supply to the upper ocean by turbulent mixing is reexamined using local standard oceanographic measurements and high-resolution vertical profiles of nutrients averaged over a large region directly comparable to that investigated by Jenkins (1982).Turbulent fluxes induced by internal waves and salt fingering, respectively, are separated according to Gregg (1989) and Zhang et al. (1998). Nutrient transport into the nutrient-consuming surface layer by salt fingering is more than fivefold higher than transport due to internal-wave induced turbulence. Still, this cannot resolve the above- mentioned apparent inconsistency, even if additional physical transport mechanisms such as eddy pumping, advection and ... : Not filtered water samples were taken in 10 ml ampoules (sealed immediately after being acidified with phosphoric acid to pH<2, sampling), or 40 ml screw-lid vials, and measured onboard at sampling or next days, or frozen (-20°C) until being acidified and measured in home labs.Carbon measurement was by high-temperature catalytic oxydation in a 10 cm column packed with 5% Pt on aluminum oxide beads at 900°C in a stream of oxygen, and CO2 detection by infrared extinction after the removal of moisture and SO2 by appropriate traps (cold trap, Mg-percarbonate, Na-pyrophosphate, tin, bronze or Sulfix). The apparatus was the dual channel Dimatek 2000 equipped with a Binos 200 detector.Nitrogen was measured by chemoluminescence detection of NO2 in the combustion gases after leaving the Binos detector in one of the two channels of the setup. Most measurements of samples containing high nitrate were discarded, when data were inconsistent. The nature of nitrate interference is not clear. ... |
format |
Article in Journal/Newspaper |
author |
Dietze, Heiner Oschlies, Andreas Kähler, Paul |
author_facet |
Dietze, Heiner Oschlies, Andreas Kähler, Paul |
author_sort |
Dietze, Heiner |
title |
Concentrations of organic carbon, nitrogen and phosphorus on vertical profiles in waters of the tropical North Atlantic in March 2002 ... |
title_short |
Concentrations of organic carbon, nitrogen and phosphorus on vertical profiles in waters of the tropical North Atlantic in March 2002 ... |
title_full |
Concentrations of organic carbon, nitrogen and phosphorus on vertical profiles in waters of the tropical North Atlantic in March 2002 ... |
title_fullStr |
Concentrations of organic carbon, nitrogen and phosphorus on vertical profiles in waters of the tropical North Atlantic in March 2002 ... |
title_full_unstemmed |
Concentrations of organic carbon, nitrogen and phosphorus on vertical profiles in waters of the tropical North Atlantic in March 2002 ... |
title_sort |
concentrations of organic carbon, nitrogen and phosphorus on vertical profiles in waters of the tropical north atlantic in march 2002 ... |
publisher |
PANGAEA |
publishDate |
2008 |
url |
https://dx.doi.org/10.1594/pangaea.696302 https://doi.pangaea.de/10.1594/PANGAEA.696302 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://dx.doi.org/10.1007/s10236-003-0060-9 https://dx.doi.org/10.1029/2003gl018552 |
op_rights |
Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_doi |
https://doi.org/10.1594/pangaea.69630210.1007/s10236-003-0060-910.1029/2003gl018552 |
_version_ |
1811642110289379328 |