Particle fluxes and composition at two mooring sites in the Polar Front Region
Particle fluxes and composition were examined over 5 years at two mooring sites in the Polar Front Region (site PF: 50°09.S, 5°50.E) and in the marginal winter sea-ice zone (site BO: 54°30.S, 3°20.W) in the eastern Atlantic Sector of the Southern Ocean. Seasonality, interannual variability and the m...
Main Authors: | , , |
---|---|
Format: | Dataset |
Language: | English |
Published: |
PANGAEA
2002
|
Subjects: | |
Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.760873 https://doi.org/10.1594/PANGAEA.760873 |
id |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.760873 |
---|---|
record_format |
openpolar |
spelling |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.760873 2024-04-21T07:58:54+00:00 Particle fluxes and composition at two mooring sites in the Polar Front Region Fischer, Gerhard Gersonde, Rainer Wefer, Gerold MEDIAN LATITUDE: -52.158555 * MEDIAN LONGITUDE: 1.378840 * SOUTH-BOUND LATITUDE: -54.343300 * WEST-BOUND LONGITUDE: -3.300000 * NORTH-BOUND LATITUDE: -50.100000 * EAST-BOUND LONGITUDE: 5.916700 * DATE/TIME START: 1987-01-15T00:00:00 * DATE/TIME END: 1995-01-01T00:00:00 2002 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.760873 https://doi.org/10.1594/PANGAEA.760873 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.760873 https://doi.org/10.1594/PANGAEA.760873 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Fischer, Gerhard; Gersonde, Rainer; Wefer, Gerold (2002): Organic carbon, biogenic silica and diatom fluxes in the marginal winter sea ice zone and in the Polar Front Region: interannual variation and changes in composition. Deep Sea Research Part II: Topical Studies in Oceanography, 49(9-10), 1721-1745, https://doi.org/10.1016/S0967-0645(02)00009-7 ANT-V/4 ANT-XII/2 ANT-XII/4 BO1 BO1_trap BO3 BO3_trap BO5 Bouvet Island Center for Marine Environmental Sciences MARUM MOOR Mooring Mooring (long time) MOORY PF1 PF3 PF5_trap PF7 PF8 Polar Front Polarstern PS10 PS33 PS35 06AQANTXII_4 South Atlantic Ocean Trap Dataset 2002 ftpangaea https://doi.org/10.1594/PANGAEA.76087310.1016/S0967-0645(02)00009-7 2024-03-27T15:15:35Z Particle fluxes and composition were examined over 5 years at two mooring sites in the Polar Front Region (site PF: 50°09.S, 5°50.E) and in the marginal winter sea-ice zone (site BO: 54°30.S, 3°20.W) in the eastern Atlantic Sector of the Southern Ocean. Seasonality, interannual variability and the magnitude of total mass fluxes were higher at site BO compared to PF. Five-year averages and standard deviations (1Sigma) of total mass fluxes were 19.6±18.5 and 24.8±29.9 g m**-2 at PF and BO, respectively. Peak fluxes at site BO occurred in January 1995, but the highest peak was measured in February 1991 (almost 1300 mg m**-2 d**-1) followed by post-bloom sedimentation in March through May. This would imply a time shift of several months between the onset of sea-ice retreat in October and major sedimentation events recorded in January/February with the upper BO traps. At site PF, highest fluxes of about 500 mg m**-2 d**-1 were found between December and March. Blooms at site BO, influenced by sea ice as indicated by diatom species composition, seem to occur more sporadically (e.g., in 1991 and 1995). Annual diatom fluxes were 11.8x10**6 and 20x10**6 valves m**-2 during the deployments PF3 (1990) and BO1 (1991), respectively. At PF3, Fragilariopsis kerguelensis (37%) and Thalassionema nitzschioides fo1 (26.5%) dominated diatom flux, while F. kerguelensis (29%) and sea-ice-related algae (40%) were the main contributors to total diatom flux at site BO. During deployment BO1, the bloom collected in February was characterized by a very high molar Si:C of 8.8 that decreased almost continuously during the post-bloom phase, reaching a value of 1 in May. This change, however, was not documented in diatom species composition. We obtained a significant linear increase of biogenic opal with organic carbon fluxes at site PF and a highly significant but exponential relationship at site BO. Higher annual total mass fluxes were recorded at site BO, primarily due to elevated opal and lithogenic fluxes, corresponding to a higher ... Dataset Bouvet Island Sea ice South Atlantic Ocean Southern Ocean PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-3.300000,5.916700,-50.100000,-54.343300) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
ANT-V/4 ANT-XII/2 ANT-XII/4 BO1 BO1_trap BO3 BO3_trap BO5 Bouvet Island Center for Marine Environmental Sciences MARUM MOOR Mooring Mooring (long time) MOORY PF1 PF3 PF5_trap PF7 PF8 Polar Front Polarstern PS10 PS33 PS35 06AQANTXII_4 South Atlantic Ocean Trap |
spellingShingle |
ANT-V/4 ANT-XII/2 ANT-XII/4 BO1 BO1_trap BO3 BO3_trap BO5 Bouvet Island Center for Marine Environmental Sciences MARUM MOOR Mooring Mooring (long time) MOORY PF1 PF3 PF5_trap PF7 PF8 Polar Front Polarstern PS10 PS33 PS35 06AQANTXII_4 South Atlantic Ocean Trap Fischer, Gerhard Gersonde, Rainer Wefer, Gerold Particle fluxes and composition at two mooring sites in the Polar Front Region |
topic_facet |
ANT-V/4 ANT-XII/2 ANT-XII/4 BO1 BO1_trap BO3 BO3_trap BO5 Bouvet Island Center for Marine Environmental Sciences MARUM MOOR Mooring Mooring (long time) MOORY PF1 PF3 PF5_trap PF7 PF8 Polar Front Polarstern PS10 PS33 PS35 06AQANTXII_4 South Atlantic Ocean Trap |
description |
Particle fluxes and composition were examined over 5 years at two mooring sites in the Polar Front Region (site PF: 50°09.S, 5°50.E) and in the marginal winter sea-ice zone (site BO: 54°30.S, 3°20.W) in the eastern Atlantic Sector of the Southern Ocean. Seasonality, interannual variability and the magnitude of total mass fluxes were higher at site BO compared to PF. Five-year averages and standard deviations (1Sigma) of total mass fluxes were 19.6±18.5 and 24.8±29.9 g m**-2 at PF and BO, respectively. Peak fluxes at site BO occurred in January 1995, but the highest peak was measured in February 1991 (almost 1300 mg m**-2 d**-1) followed by post-bloom sedimentation in March through May. This would imply a time shift of several months between the onset of sea-ice retreat in October and major sedimentation events recorded in January/February with the upper BO traps. At site PF, highest fluxes of about 500 mg m**-2 d**-1 were found between December and March. Blooms at site BO, influenced by sea ice as indicated by diatom species composition, seem to occur more sporadically (e.g., in 1991 and 1995). Annual diatom fluxes were 11.8x10**6 and 20x10**6 valves m**-2 during the deployments PF3 (1990) and BO1 (1991), respectively. At PF3, Fragilariopsis kerguelensis (37%) and Thalassionema nitzschioides fo1 (26.5%) dominated diatom flux, while F. kerguelensis (29%) and sea-ice-related algae (40%) were the main contributors to total diatom flux at site BO. During deployment BO1, the bloom collected in February was characterized by a very high molar Si:C of 8.8 that decreased almost continuously during the post-bloom phase, reaching a value of 1 in May. This change, however, was not documented in diatom species composition. We obtained a significant linear increase of biogenic opal with organic carbon fluxes at site PF and a highly significant but exponential relationship at site BO. Higher annual total mass fluxes were recorded at site BO, primarily due to elevated opal and lithogenic fluxes, corresponding to a higher ... |
format |
Dataset |
author |
Fischer, Gerhard Gersonde, Rainer Wefer, Gerold |
author_facet |
Fischer, Gerhard Gersonde, Rainer Wefer, Gerold |
author_sort |
Fischer, Gerhard |
title |
Particle fluxes and composition at two mooring sites in the Polar Front Region |
title_short |
Particle fluxes and composition at two mooring sites in the Polar Front Region |
title_full |
Particle fluxes and composition at two mooring sites in the Polar Front Region |
title_fullStr |
Particle fluxes and composition at two mooring sites in the Polar Front Region |
title_full_unstemmed |
Particle fluxes and composition at two mooring sites in the Polar Front Region |
title_sort |
particle fluxes and composition at two mooring sites in the polar front region |
publisher |
PANGAEA |
publishDate |
2002 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.760873 https://doi.org/10.1594/PANGAEA.760873 |
op_coverage |
MEDIAN LATITUDE: -52.158555 * MEDIAN LONGITUDE: 1.378840 * SOUTH-BOUND LATITUDE: -54.343300 * WEST-BOUND LONGITUDE: -3.300000 * NORTH-BOUND LATITUDE: -50.100000 * EAST-BOUND LONGITUDE: 5.916700 * DATE/TIME START: 1987-01-15T00:00:00 * DATE/TIME END: 1995-01-01T00:00:00 |
long_lat |
ENVELOPE(-3.300000,5.916700,-50.100000,-54.343300) |
genre |
Bouvet Island Sea ice South Atlantic Ocean Southern Ocean |
genre_facet |
Bouvet Island Sea ice South Atlantic Ocean Southern Ocean |
op_source |
Supplement to: Fischer, Gerhard; Gersonde, Rainer; Wefer, Gerold (2002): Organic carbon, biogenic silica and diatom fluxes in the marginal winter sea ice zone and in the Polar Front Region: interannual variation and changes in composition. Deep Sea Research Part II: Topical Studies in Oceanography, 49(9-10), 1721-1745, https://doi.org/10.1016/S0967-0645(02)00009-7 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.760873 https://doi.org/10.1594/PANGAEA.760873 |
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.76087310.1016/S0967-0645(02)00009-7 |
_version_ |
1796939867253374976 |