(Table 2) Comparison of annual mass fluxes measured with shallower and deeper sediment traps off Cape Blanc (CB)
The ocean off NW Africa is the second most important coastal upwelling system with a total annual primary production of 0.33 Gt of carbon per year (Carr in Deep Sea Res II 49:59-80, 2002). Deep ocean organic carbon fluxes measured by sediment traps are also fairly high despite low biogenic opal flux...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.760878 2024-09-15T18:37:25+00:00 (Table 2) Comparison of annual mass fluxes measured with shallower and deeper sediment traps off Cape Blanc (CB) Fischer, Gerhard Karakas, Gökay Blaas, M Ratmeyer, Volker Nowald, Nicolas Schlitzer, Reiner Helmke, Peer Davenport, Robert Donner, Barbara Neuer, Susanne Wefer, Gerold MEDIAN LATITUDE: 21.183233 * MEDIAN LONGITUDE: -20.708567 * SOUTH-BOUND LATITUDE: 21.138000 * WEST-BOUND LONGITUDE: -20.766700 * NORTH-BOUND LATITUDE: 21.266700 * EAST-BOUND LONGITUDE: -20.672000 * DATE/TIME START: 1990-04-08T00:00:00 * DATE/TIME END: 2002-01-01T00:00:00 * MINIMUM DEPTH, water: 730 m * MAXIMUM DEPTH, water: 3606 m 2009 text/tab-separated-values, 39 data points https://doi.pangaea.de/10.1594/PANGAEA.760878 https://doi.org/10.1594/PANGAEA.760878 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.760878 https://doi.org/10.1594/PANGAEA.760878 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Fischer, Gerhard; Karakas, Gökay; Blaas, M; Ratmeyer, Volker; Nowald, Nicolas; Schlitzer, Reiner; Helmke, Peer; Davenport, Robert; Donner, Barbara; Neuer, Susanne; Wefer, Gerold (2009): Mineral ballast and particle settling rates in the coastal upwelling system off NW Africa and the South Atlantic. International Journal of Earth Sciences, 98(2), 281-298, https://doi.org/10.1007/s00531-007-0234-7 Calcium carbonate flux Calculated see reference(s) Cape Blanc Carbon organic CB13 CB13_trap CB3_trap CB4_trap Center for Marine Environmental Sciences Comment DEPTH water Event label Lithogenic M12/1 M16/2 MARUM Meteor (1986) Opal Sample code/label Total flux per year Trap dataset 2009 ftpangaea https://doi.org/10.1594/PANGAEA.76087810.1007/s00531-007-0234-7 2024-07-24T02:31:31Z The ocean off NW Africa is the second most important coastal upwelling system with a total annual primary production of 0.33 Gt of carbon per year (Carr in Deep Sea Res II 49:59-80, 2002). Deep ocean organic carbon fluxes measured by sediment traps are also fairly high despite low biogenic opal fluxes. Due to a low supply of dissolved silicate from subsurface waters, the ocean off NW Africa is characterized by predominantly carbonate-secreting primary producers, i.e. coccolithophorids. These algae which are key primary producers since millions of years are found in organic- and chlorophyll-rich zooplankton fecal pellets, which sink rapidly through the water column within a few days. Particle flux studies in the Mauretanian upwelling area (Cape Blanc) confirm the hypothesis of Armstrong et al. (Deep Sea Res II 49:219-236, 2002) who proposed that ballast availability, e.g. of carbonate particles, is essential to predict deep ocean organic carbon fluxes. The role of dust as ballast mineral for organic carbon, however, must be also taken into consideration in the coastal settings off NW Africa. There, high settling rates of larger particles approach 400 m day**-1, which may be due to a particular composition of mineral ballast. An assessment of particle settling rates from opal-production systems in the Southern Ocean of the Atlantic Sector, in contrast, provides lower values, consistent with the assumptions of Francois et al. (Global Biogeochem Cycles 16(4):1087, 2002). Satellite chlorophyll distributions, particle distributions and fluxes in the water column off NW Africa as well as modelling studies suggest a significant lateral flux component and export of particles from coastal shelf waters into the open ocean. These transport processes have implications for paleo-reconstructions from sediment cores retrieved at continental margin settings. Dataset Southern Ocean PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-20.766700,-20.672000,21.266700,21.138000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Calcium carbonate flux Calculated see reference(s) Cape Blanc Carbon organic CB13 CB13_trap CB3_trap CB4_trap Center for Marine Environmental Sciences Comment DEPTH water Event label Lithogenic M12/1 M16/2 MARUM Meteor (1986) Opal Sample code/label Total flux per year Trap |
spellingShingle |
Calcium carbonate flux Calculated see reference(s) Cape Blanc Carbon organic CB13 CB13_trap CB3_trap CB4_trap Center for Marine Environmental Sciences Comment DEPTH water Event label Lithogenic M12/1 M16/2 MARUM Meteor (1986) Opal Sample code/label Total flux per year Trap Fischer, Gerhard Karakas, Gökay Blaas, M Ratmeyer, Volker Nowald, Nicolas Schlitzer, Reiner Helmke, Peer Davenport, Robert Donner, Barbara Neuer, Susanne Wefer, Gerold (Table 2) Comparison of annual mass fluxes measured with shallower and deeper sediment traps off Cape Blanc (CB) |
topic_facet |
Calcium carbonate flux Calculated see reference(s) Cape Blanc Carbon organic CB13 CB13_trap CB3_trap CB4_trap Center for Marine Environmental Sciences Comment DEPTH water Event label Lithogenic M12/1 M16/2 MARUM Meteor (1986) Opal Sample code/label Total flux per year Trap |
description |
The ocean off NW Africa is the second most important coastal upwelling system with a total annual primary production of 0.33 Gt of carbon per year (Carr in Deep Sea Res II 49:59-80, 2002). Deep ocean organic carbon fluxes measured by sediment traps are also fairly high despite low biogenic opal fluxes. Due to a low supply of dissolved silicate from subsurface waters, the ocean off NW Africa is characterized by predominantly carbonate-secreting primary producers, i.e. coccolithophorids. These algae which are key primary producers since millions of years are found in organic- and chlorophyll-rich zooplankton fecal pellets, which sink rapidly through the water column within a few days. Particle flux studies in the Mauretanian upwelling area (Cape Blanc) confirm the hypothesis of Armstrong et al. (Deep Sea Res II 49:219-236, 2002) who proposed that ballast availability, e.g. of carbonate particles, is essential to predict deep ocean organic carbon fluxes. The role of dust as ballast mineral for organic carbon, however, must be also taken into consideration in the coastal settings off NW Africa. There, high settling rates of larger particles approach 400 m day**-1, which may be due to a particular composition of mineral ballast. An assessment of particle settling rates from opal-production systems in the Southern Ocean of the Atlantic Sector, in contrast, provides lower values, consistent with the assumptions of Francois et al. (Global Biogeochem Cycles 16(4):1087, 2002). Satellite chlorophyll distributions, particle distributions and fluxes in the water column off NW Africa as well as modelling studies suggest a significant lateral flux component and export of particles from coastal shelf waters into the open ocean. These transport processes have implications for paleo-reconstructions from sediment cores retrieved at continental margin settings. |
format |
Dataset |
author |
Fischer, Gerhard Karakas, Gökay Blaas, M Ratmeyer, Volker Nowald, Nicolas Schlitzer, Reiner Helmke, Peer Davenport, Robert Donner, Barbara Neuer, Susanne Wefer, Gerold |
author_facet |
Fischer, Gerhard Karakas, Gökay Blaas, M Ratmeyer, Volker Nowald, Nicolas Schlitzer, Reiner Helmke, Peer Davenport, Robert Donner, Barbara Neuer, Susanne Wefer, Gerold |
author_sort |
Fischer, Gerhard |
title |
(Table 2) Comparison of annual mass fluxes measured with shallower and deeper sediment traps off Cape Blanc (CB) |
title_short |
(Table 2) Comparison of annual mass fluxes measured with shallower and deeper sediment traps off Cape Blanc (CB) |
title_full |
(Table 2) Comparison of annual mass fluxes measured with shallower and deeper sediment traps off Cape Blanc (CB) |
title_fullStr |
(Table 2) Comparison of annual mass fluxes measured with shallower and deeper sediment traps off Cape Blanc (CB) |
title_full_unstemmed |
(Table 2) Comparison of annual mass fluxes measured with shallower and deeper sediment traps off Cape Blanc (CB) |
title_sort |
(table 2) comparison of annual mass fluxes measured with shallower and deeper sediment traps off cape blanc (cb) |
publisher |
PANGAEA |
publishDate |
2009 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.760878 https://doi.org/10.1594/PANGAEA.760878 |
op_coverage |
MEDIAN LATITUDE: 21.183233 * MEDIAN LONGITUDE: -20.708567 * SOUTH-BOUND LATITUDE: 21.138000 * WEST-BOUND LONGITUDE: -20.766700 * NORTH-BOUND LATITUDE: 21.266700 * EAST-BOUND LONGITUDE: -20.672000 * DATE/TIME START: 1990-04-08T00:00:00 * DATE/TIME END: 2002-01-01T00:00:00 * MINIMUM DEPTH, water: 730 m * MAXIMUM DEPTH, water: 3606 m |
long_lat |
ENVELOPE(-20.766700,-20.672000,21.266700,21.138000) |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Supplement to: Fischer, Gerhard; Karakas, Gökay; Blaas, M; Ratmeyer, Volker; Nowald, Nicolas; Schlitzer, Reiner; Helmke, Peer; Davenport, Robert; Donner, Barbara; Neuer, Susanne; Wefer, Gerold (2009): Mineral ballast and particle settling rates in the coastal upwelling system off NW Africa and the South Atlantic. International Journal of Earth Sciences, 98(2), 281-298, https://doi.org/10.1007/s00531-007-0234-7 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.760878 https://doi.org/10.1594/PANGAEA.760878 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.76087810.1007/s00531-007-0234-7 |
_version_ |
1810481789739728896 |