Fluxes and foraminifera fluxes of sediment traps in the Peru-Chile Current
Time-series sediment traps were deployed 180 km off the Chilean coast at 30°S in the Peru-Chile Current during the El Niño period 1991/1992 (6 months) and during the 'normal' period 1993/1994 (12 months). Under normal conditions in 1993/1994 the particle fluxes display a pronounced seasona...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.759825 2024-09-15T18:19:32+00:00 Fluxes and foraminifera fluxes of sediment traps in the Peru-Chile Current Hebbeln, Dierk Marchant, Margarita Wefer, Gerold MEDIAN LATITUDE: -30.011250 * MEDIAN LONGITUDE: -73.194805 * SOUTH-BOUND LATITUDE: -30.017500 * WEST-BOUND LONGITUDE: -73.220500 * NORTH-BOUND LATITUDE: -30.005000 * EAST-BOUND LONGITUDE: -73.171160 * DATE/TIME START: 1993-07-22T00:00:00 * DATE/TIME END: 1994-06-26T00:00:00 2000 application/zip, 4 datasets https://doi.pangaea.de/10.1594/PANGAEA.759825 https://doi.org/10.1594/PANGAEA.759825 en eng PANGAEA Marchant, Margarita; Hebbeln, Dierk; Wefer, Gerold (1998): Seasonal flux patterns of planktic foraminifera in the Peru-Chile Current. Deep Sea Research Part I: Oceanographic Research Papers, 45(7), 1161-1185, https://doi.org/10.1016/S0967-0637(98)00009-0 Romero, Oscar E; Hebbeln, Dierk; Wefer, Gerold (2001): Temporal and spatial variability in export production in the SE Pacific Ocean: evidence from siliceous plankton fluxes and surface sediment assemblages. Deep Sea Research Part I: Oceanographic Research Papers, 48(12), 2673-2697, https://doi.org/10.1016/S0967-0637(01)00037-1 https://doi.pangaea.de/10.1594/PANGAEA.759825 https://doi.org/10.1594/PANGAEA.759825 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Hebbeln, Dierk; Marchant, Margarita; Wefer, Gerold (2000): Seasonal variations of the particle flux in the Peru-Chile Current at 30°S under normal and El Nino conditions. Deep Sea Research Part II: Topical Studies in Oceanography, 47(9-11), 2101-2128, https://doi.org/10.1016/S0967-0645(00)00018-7 CH3-1_trap CH4-1_trap JGOFS Joint Global Ocean Flux Study OCEMOS 1 OCEMOS 2 off Chile Trap dataset publication series 2000 ftpangaea https://doi.org/10.1594/PANGAEA.75982510.1016/S0967-0645(00)00018-710.1016/S0967-0637(98)00009-010.1016/S0967-0637(01)00037-1 2024-07-24T02:31:20Z Time-series sediment traps were deployed 180 km off the Chilean coast at 30°S in the Peru-Chile Current during the El Niño period 1991/1992 (6 months) and during the 'normal' period 1993/1994 (12 months). Under normal conditions in 1993/1994 the particle fluxes display a pronounced seasonal cycle marked by a settling phytoplankton bloom in September, intermediate fluxes until January, and low fluxes between January and July. This seasonal pattern is also reflected in stable isotope data, measured on the planktic foraminifera species Neogloboquadrina pachyderma (dex.) and Globigerina bulloides, which indicate persistent upwelling conditions between August and February followed by a stratified water column between March and July. The total flux under normal conditions amounts to 65.1 g m**-2 a**-1, with the main flux constituents contributing 47.6% (carbonate), 26.4% (lithogenic matter), 17.4% (biogenic opal), and 8.6% (organic matter), respectively. Based on these particle flux data the export production has been estimated to be 42 gC m**-2 a**-1. Although the main flux event in September was not sampled in the El Niño period 1991/1992, the available record from November 1991 to April 1992 allows an interesting comparison with the fluxes of the normal year. The total amount of fluxes and the timing of minor flux events are very similar under normal and under El Niño conditions. However, increased proportions of organic carbon and lithogenic matter under El Niño conditions are interpreted to reflect faster sedimentation and preferred scavenging of organic matter by elevated lithogenic fluxes rather than increased productivity. The higher lithogenic fluxes under El Niño conditions are probably due to increased precipitation and terrestial runoff in the arid to semiarid northern part of Chile. Other/Unknown Material Neogloboquadrina pachyderma PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-73.220500,-73.171160,-30.005000,-30.017500) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
CH3-1_trap CH4-1_trap JGOFS Joint Global Ocean Flux Study OCEMOS 1 OCEMOS 2 off Chile Trap |
spellingShingle |
CH3-1_trap CH4-1_trap JGOFS Joint Global Ocean Flux Study OCEMOS 1 OCEMOS 2 off Chile Trap Hebbeln, Dierk Marchant, Margarita Wefer, Gerold Fluxes and foraminifera fluxes of sediment traps in the Peru-Chile Current |
topic_facet |
CH3-1_trap CH4-1_trap JGOFS Joint Global Ocean Flux Study OCEMOS 1 OCEMOS 2 off Chile Trap |
description |
Time-series sediment traps were deployed 180 km off the Chilean coast at 30°S in the Peru-Chile Current during the El Niño period 1991/1992 (6 months) and during the 'normal' period 1993/1994 (12 months). Under normal conditions in 1993/1994 the particle fluxes display a pronounced seasonal cycle marked by a settling phytoplankton bloom in September, intermediate fluxes until January, and low fluxes between January and July. This seasonal pattern is also reflected in stable isotope data, measured on the planktic foraminifera species Neogloboquadrina pachyderma (dex.) and Globigerina bulloides, which indicate persistent upwelling conditions between August and February followed by a stratified water column between March and July. The total flux under normal conditions amounts to 65.1 g m**-2 a**-1, with the main flux constituents contributing 47.6% (carbonate), 26.4% (lithogenic matter), 17.4% (biogenic opal), and 8.6% (organic matter), respectively. Based on these particle flux data the export production has been estimated to be 42 gC m**-2 a**-1. Although the main flux event in September was not sampled in the El Niño period 1991/1992, the available record from November 1991 to April 1992 allows an interesting comparison with the fluxes of the normal year. The total amount of fluxes and the timing of minor flux events are very similar under normal and under El Niño conditions. However, increased proportions of organic carbon and lithogenic matter under El Niño conditions are interpreted to reflect faster sedimentation and preferred scavenging of organic matter by elevated lithogenic fluxes rather than increased productivity. The higher lithogenic fluxes under El Niño conditions are probably due to increased precipitation and terrestial runoff in the arid to semiarid northern part of Chile. |
format |
Other/Unknown Material |
author |
Hebbeln, Dierk Marchant, Margarita Wefer, Gerold |
author_facet |
Hebbeln, Dierk Marchant, Margarita Wefer, Gerold |
author_sort |
Hebbeln, Dierk |
title |
Fluxes and foraminifera fluxes of sediment traps in the Peru-Chile Current |
title_short |
Fluxes and foraminifera fluxes of sediment traps in the Peru-Chile Current |
title_full |
Fluxes and foraminifera fluxes of sediment traps in the Peru-Chile Current |
title_fullStr |
Fluxes and foraminifera fluxes of sediment traps in the Peru-Chile Current |
title_full_unstemmed |
Fluxes and foraminifera fluxes of sediment traps in the Peru-Chile Current |
title_sort |
fluxes and foraminifera fluxes of sediment traps in the peru-chile current |
publisher |
PANGAEA |
publishDate |
2000 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.759825 https://doi.org/10.1594/PANGAEA.759825 |
op_coverage |
MEDIAN LATITUDE: -30.011250 * MEDIAN LONGITUDE: -73.194805 * SOUTH-BOUND LATITUDE: -30.017500 * WEST-BOUND LONGITUDE: -73.220500 * NORTH-BOUND LATITUDE: -30.005000 * EAST-BOUND LONGITUDE: -73.171160 * DATE/TIME START: 1993-07-22T00:00:00 * DATE/TIME END: 1994-06-26T00:00:00 |
long_lat |
ENVELOPE(-73.220500,-73.171160,-30.005000,-30.017500) |
genre |
Neogloboquadrina pachyderma |
genre_facet |
Neogloboquadrina pachyderma |
op_source |
Supplement to: Hebbeln, Dierk; Marchant, Margarita; Wefer, Gerold (2000): Seasonal variations of the particle flux in the Peru-Chile Current at 30°S under normal and El Nino conditions. Deep Sea Research Part II: Topical Studies in Oceanography, 47(9-11), 2101-2128, https://doi.org/10.1016/S0967-0645(00)00018-7 |
op_relation |
Marchant, Margarita; Hebbeln, Dierk; Wefer, Gerold (1998): Seasonal flux patterns of planktic foraminifera in the Peru-Chile Current. Deep Sea Research Part I: Oceanographic Research Papers, 45(7), 1161-1185, https://doi.org/10.1016/S0967-0637(98)00009-0 Romero, Oscar E; Hebbeln, Dierk; Wefer, Gerold (2001): Temporal and spatial variability in export production in the SE Pacific Ocean: evidence from siliceous plankton fluxes and surface sediment assemblages. Deep Sea Research Part I: Oceanographic Research Papers, 48(12), 2673-2697, https://doi.org/10.1016/S0967-0637(01)00037-1 https://doi.pangaea.de/10.1594/PANGAEA.759825 https://doi.org/10.1594/PANGAEA.759825 |
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.75982510.1016/S0967-0645(00)00018-710.1016/S0967-0637(98)00009-010.1016/S0967-0637(01)00037-1 |
_version_ |
1810457885471145984 |