Recycling and burial of organic carbon in sediments of the Porcupine Abyssal Plain, NE Atlantic.
Rates of degradation, recycling and burial of organic carbon (OC) and their temporal and spatial variability were investigated in deep-sea sediments of the Porcupine Abyssal Plain (PAP) in the Northeast Atlantic Ocean (depth 4800-4850 m) during six cruises in August 1996-April 1999. Benthic fluxes o...
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ftuhipublicatio:oai:pure.atira.dk:publications/277bcf3e-52c2-4ae5-beaa-6a31dd8052b5 2024-09-15T18:25:30+00:00 Recycling and burial of organic carbon in sediments of the Porcupine Abyssal Plain, NE Atlantic. Stahl, Henrik Tengberg, A Brunnegard, J Hall, Per O J 2004 https://pure.uhi.ac.uk/en/publications/277bcf3e-52c2-4ae5-beaa-6a31dd8052b5 eng eng https://pure.uhi.ac.uk/en/publications/277bcf3e-52c2-4ae5-beaa-6a31dd8052b5 info:eu-repo/semantics/restrictedAccess Stahl , H , Tengberg , A , Brunnegard , J & Hall , P O J 2004 , ' Recycling and burial of organic carbon in sediments of the Porcupine Abyssal Plain, NE Atlantic. ' , DEEP-SEA RES PT I , no. 1 , pp. 777-791 . SEASONAL DEPOSITION EUROPEAN CONTINENTAL-MARGIN NORTHEASTERN ATLANTIC GOBAN SPUR EASTERN NORTH PACIFIC COMMUNITY OXYGEN-CONSUMPTION INSITU MEASUREMENTS Oceanography BIOGENIC PARTICLE FLUXES INORGANIC CARBON DEEP-SEA SEDIMENTS article 2004 ftuhipublicatio 2024-06-24T23:48:36Z Rates of degradation, recycling and burial of organic carbon (OC) and their temporal and spatial variability were investigated in deep-sea sediments of the Porcupine Abyssal Plain (PAP) in the Northeast Atlantic Ocean (depth 4800-4850 m) during six cruises in August 1996-April 1999. Benthic fluxes of total dissolved inorganic carbon (C-T) and alkalinity (A(T)) were measured in situ using benthic chambers of a free-vehicle benthic lander on four of the cruises. To obtain the OC oxidation rate (C-ox), the C-T flux in each chamber was corrected for CaCO3 dissolution. Burial of OC was determined by using downcore profiles of OC (n = 20) in the solid phase of the sediment and sediment accumulation rates estimated from a model age based on C-14 dating of foraminifera. Results obtained showed that during 1996-1999 C-ox rates in PAP sediments varied between deployments from 0.21 +/- 0.04 to 0.86 +/- 0.23 mmol m(-2) d(-1) with a total mean of 0.46 mmol m(-2) d(-1) (SD +/- 0.37, n = 31). No statistically significant spatial (between stations) or temporal (seasonal as well as interannual) variation in the C-ox rates could be detected during the sampling period. The mean burial rate was determined to be 0.03 +/- 0.01 mmol m(-2) d(-1). On average over the sampling period, similar to94% of the particulate organic carbon (POC) deposited was recycled as C-T to the overlying water and similar to6% was buried. The calculated mean POC demand during 1996-1999 of 0.49 +/- 0.37 mmol m(-2) d(-1) (the sum of corrected C-T and burial fluxes) was not significantly different from the annual integrated mean POC supply (1997-1999) of 0.24 +/- 0.06 mmol m(-2) d(-1) estimated from calibrated sediment traps 1800 mab at the same locality. (C) 2004 Elsevier Ltd. All rights reserved. Article in Journal/Newspaper Northeast Atlantic University of the Highlands and Islands: Research Database of UHI |
institution |
Open Polar |
collection |
University of the Highlands and Islands: Research Database of UHI |
op_collection_id |
ftuhipublicatio |
language |
English |
topic |
SEASONAL DEPOSITION EUROPEAN CONTINENTAL-MARGIN NORTHEASTERN ATLANTIC GOBAN SPUR EASTERN NORTH PACIFIC COMMUNITY OXYGEN-CONSUMPTION INSITU MEASUREMENTS Oceanography BIOGENIC PARTICLE FLUXES INORGANIC CARBON DEEP-SEA SEDIMENTS |
spellingShingle |
SEASONAL DEPOSITION EUROPEAN CONTINENTAL-MARGIN NORTHEASTERN ATLANTIC GOBAN SPUR EASTERN NORTH PACIFIC COMMUNITY OXYGEN-CONSUMPTION INSITU MEASUREMENTS Oceanography BIOGENIC PARTICLE FLUXES INORGANIC CARBON DEEP-SEA SEDIMENTS Stahl, Henrik Tengberg, A Brunnegard, J Hall, Per O J Recycling and burial of organic carbon in sediments of the Porcupine Abyssal Plain, NE Atlantic. |
topic_facet |
SEASONAL DEPOSITION EUROPEAN CONTINENTAL-MARGIN NORTHEASTERN ATLANTIC GOBAN SPUR EASTERN NORTH PACIFIC COMMUNITY OXYGEN-CONSUMPTION INSITU MEASUREMENTS Oceanography BIOGENIC PARTICLE FLUXES INORGANIC CARBON DEEP-SEA SEDIMENTS |
description |
Rates of degradation, recycling and burial of organic carbon (OC) and their temporal and spatial variability were investigated in deep-sea sediments of the Porcupine Abyssal Plain (PAP) in the Northeast Atlantic Ocean (depth 4800-4850 m) during six cruises in August 1996-April 1999. Benthic fluxes of total dissolved inorganic carbon (C-T) and alkalinity (A(T)) were measured in situ using benthic chambers of a free-vehicle benthic lander on four of the cruises. To obtain the OC oxidation rate (C-ox), the C-T flux in each chamber was corrected for CaCO3 dissolution. Burial of OC was determined by using downcore profiles of OC (n = 20) in the solid phase of the sediment and sediment accumulation rates estimated from a model age based on C-14 dating of foraminifera. Results obtained showed that during 1996-1999 C-ox rates in PAP sediments varied between deployments from 0.21 +/- 0.04 to 0.86 +/- 0.23 mmol m(-2) d(-1) with a total mean of 0.46 mmol m(-2) d(-1) (SD +/- 0.37, n = 31). No statistically significant spatial (between stations) or temporal (seasonal as well as interannual) variation in the C-ox rates could be detected during the sampling period. The mean burial rate was determined to be 0.03 +/- 0.01 mmol m(-2) d(-1). On average over the sampling period, similar to94% of the particulate organic carbon (POC) deposited was recycled as C-T to the overlying water and similar to6% was buried. The calculated mean POC demand during 1996-1999 of 0.49 +/- 0.37 mmol m(-2) d(-1) (the sum of corrected C-T and burial fluxes) was not significantly different from the annual integrated mean POC supply (1997-1999) of 0.24 +/- 0.06 mmol m(-2) d(-1) estimated from calibrated sediment traps 1800 mab at the same locality. (C) 2004 Elsevier Ltd. All rights reserved. |
format |
Article in Journal/Newspaper |
author |
Stahl, Henrik Tengberg, A Brunnegard, J Hall, Per O J |
author_facet |
Stahl, Henrik Tengberg, A Brunnegard, J Hall, Per O J |
author_sort |
Stahl, Henrik |
title |
Recycling and burial of organic carbon in sediments of the Porcupine Abyssal Plain, NE Atlantic. |
title_short |
Recycling and burial of organic carbon in sediments of the Porcupine Abyssal Plain, NE Atlantic. |
title_full |
Recycling and burial of organic carbon in sediments of the Porcupine Abyssal Plain, NE Atlantic. |
title_fullStr |
Recycling and burial of organic carbon in sediments of the Porcupine Abyssal Plain, NE Atlantic. |
title_full_unstemmed |
Recycling and burial of organic carbon in sediments of the Porcupine Abyssal Plain, NE Atlantic. |
title_sort |
recycling and burial of organic carbon in sediments of the porcupine abyssal plain, ne atlantic. |
publishDate |
2004 |
url |
https://pure.uhi.ac.uk/en/publications/277bcf3e-52c2-4ae5-beaa-6a31dd8052b5 |
genre |
Northeast Atlantic |
genre_facet |
Northeast Atlantic |
op_source |
Stahl , H , Tengberg , A , Brunnegard , J & Hall , P O J 2004 , ' Recycling and burial of organic carbon in sediments of the Porcupine Abyssal Plain, NE Atlantic. ' , DEEP-SEA RES PT I , no. 1 , pp. 777-791 . |
op_relation |
https://pure.uhi.ac.uk/en/publications/277bcf3e-52c2-4ae5-beaa-6a31dd8052b5 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
_version_ |
1810466017857503232 |