DataSheet1_Mesopelagic particulate nitrogen dynamics in the subarctic and subtropical regions of the western North Pacific.docx
Recently, new spatiotemporal-scale particle observations by autonomous profiling floats equipped with bio-optical sensors have revealed that, in addition to gravitational particle sinking, the downward transport of surface particles by physical mixing events, which has been overlooked, contributes t...
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Online Access: | https://doi.org/10.3389/feart.2023.1176889.s001 https://figshare.com/articles/dataset/DataSheet1_Mesopelagic_particulate_nitrogen_dynamics_in_the_subarctic_and_subtropical_regions_of_the_western_North_Pacific_docx/24172383 |
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ftfrontimediafig:oai:figshare.com:article/24172383 2023-10-25T01:44:13+02:00 DataSheet1_Mesopelagic particulate nitrogen dynamics in the subarctic and subtropical regions of the western North Pacific.docx Yoshihisa Mino Chiho Sukigara Hajime Kawakami Masahide Wakita Makio C. Honda 2023-09-21T04:05:06Z https://doi.org/10.3389/feart.2023.1176889.s001 https://figshare.com/articles/dataset/DataSheet1_Mesopelagic_particulate_nitrogen_dynamics_in_the_subarctic_and_subtropical_regions_of_the_western_North_Pacific_docx/24172383 unknown doi:10.3389/feart.2023.1176889.s001 https://figshare.com/articles/dataset/DataSheet1_Mesopelagic_particulate_nitrogen_dynamics_in_the_subarctic_and_subtropical_regions_of_the_western_North_Pacific_docx/24172383 CC BY 4.0 Solid Earth Sciences Climate Science Atmospheric Sciences not elsewhere classified Exploration Geochemistry Inorganic Geochemistry Isotope Geochemistry Organic Geochemistry Geochemistry not elsewhere classified Igneous and Metamorphic Petrology Ore Deposit Petrology Palaeontology (incl. Palynology) Structural Geology Tectonics Volcanology Geology not elsewhere classified Seismology and Seismic Exploration Glaciology Hydrogeology Natural Hazards Quaternary Environments Earth Sciences not elsewhere classified Evolutionary Impacts of Climate Change mesopelagic particle dynamics mixed-layer pump particle fragmentation suspended and sinking particles stable nitrogen isotopes biological carbon pump western North Pacific K2S1 project Dataset 2023 ftfrontimediafig https://doi.org/10.3389/feart.2023.1176889.s001 2023-09-27T23:15:43Z Recently, new spatiotemporal-scale particle observations by autonomous profiling floats equipped with bio-optical sensors have revealed that, in addition to gravitational particle sinking, the downward transport of surface particles by physical mixing events, which has been overlooked, contributes to particulate organic carbon export. However, the subsequent behavior of these exported particles in the mesopelagic zone (e.g., particle fragmentation and degradation) remains unclear, although it may influence the efficiency of carbon transport to further depths. This study successfully depicted the new annual mean mesopelagic particulate nitrogen (PN) dynamics with multi-layer, steady-state suspended PN pools by reanalyzing seasonal data on the stable nitrogen isotopic compositions of both suspended and sinking particles, each with different profiles, from subarctic station K2 and subtropical station S1 in the North Pacific, which are both CO 2 sinks but in different oceanic settings. As analytical conditions, we assumed that the net loss of sinking PN was entirely due to abiotic fragmentation of particle aggregates to non-sinking particles and that the apparent 15 N enrichment associated with heterotrophic degradation in the suspended PN pools was vertically constant. The 15 N mass balance for the PN supply to the uppermost mesopelagic pool, derived from such constraints, allowed estimating the PN export by the mixed-layer pump, which was 1.6 times greater at K2 than at S1. However, its contribution to the total export (including gravitational PN sinking) from the surface layer was approximately 20% at both stations. Moreover, the ratio of PN supplied to the uppermost pool by the mixed-layer pump and by the fragmentation of particle aggregates was also similar at both stations, approximately 1:1. Using these ratios, together with separate observations of the mixed-layer pump-driven flux, it may be possible to estimate the efficiency of the particulate organic carbon transport due to the biological gravitational ... Dataset Subarctic Frontiers: Figshare Pacific |
institution |
Open Polar |
collection |
Frontiers: Figshare |
op_collection_id |
ftfrontimediafig |
language |
unknown |
topic |
Solid Earth Sciences Climate Science Atmospheric Sciences not elsewhere classified Exploration Geochemistry Inorganic Geochemistry Isotope Geochemistry Organic Geochemistry Geochemistry not elsewhere classified Igneous and Metamorphic Petrology Ore Deposit Petrology Palaeontology (incl. Palynology) Structural Geology Tectonics Volcanology Geology not elsewhere classified Seismology and Seismic Exploration Glaciology Hydrogeology Natural Hazards Quaternary Environments Earth Sciences not elsewhere classified Evolutionary Impacts of Climate Change mesopelagic particle dynamics mixed-layer pump particle fragmentation suspended and sinking particles stable nitrogen isotopes biological carbon pump western North Pacific K2S1 project |
spellingShingle |
Solid Earth Sciences Climate Science Atmospheric Sciences not elsewhere classified Exploration Geochemistry Inorganic Geochemistry Isotope Geochemistry Organic Geochemistry Geochemistry not elsewhere classified Igneous and Metamorphic Petrology Ore Deposit Petrology Palaeontology (incl. Palynology) Structural Geology Tectonics Volcanology Geology not elsewhere classified Seismology and Seismic Exploration Glaciology Hydrogeology Natural Hazards Quaternary Environments Earth Sciences not elsewhere classified Evolutionary Impacts of Climate Change mesopelagic particle dynamics mixed-layer pump particle fragmentation suspended and sinking particles stable nitrogen isotopes biological carbon pump western North Pacific K2S1 project Yoshihisa Mino Chiho Sukigara Hajime Kawakami Masahide Wakita Makio C. Honda DataSheet1_Mesopelagic particulate nitrogen dynamics in the subarctic and subtropical regions of the western North Pacific.docx |
topic_facet |
Solid Earth Sciences Climate Science Atmospheric Sciences not elsewhere classified Exploration Geochemistry Inorganic Geochemistry Isotope Geochemistry Organic Geochemistry Geochemistry not elsewhere classified Igneous and Metamorphic Petrology Ore Deposit Petrology Palaeontology (incl. Palynology) Structural Geology Tectonics Volcanology Geology not elsewhere classified Seismology and Seismic Exploration Glaciology Hydrogeology Natural Hazards Quaternary Environments Earth Sciences not elsewhere classified Evolutionary Impacts of Climate Change mesopelagic particle dynamics mixed-layer pump particle fragmentation suspended and sinking particles stable nitrogen isotopes biological carbon pump western North Pacific K2S1 project |
description |
Recently, new spatiotemporal-scale particle observations by autonomous profiling floats equipped with bio-optical sensors have revealed that, in addition to gravitational particle sinking, the downward transport of surface particles by physical mixing events, which has been overlooked, contributes to particulate organic carbon export. However, the subsequent behavior of these exported particles in the mesopelagic zone (e.g., particle fragmentation and degradation) remains unclear, although it may influence the efficiency of carbon transport to further depths. This study successfully depicted the new annual mean mesopelagic particulate nitrogen (PN) dynamics with multi-layer, steady-state suspended PN pools by reanalyzing seasonal data on the stable nitrogen isotopic compositions of both suspended and sinking particles, each with different profiles, from subarctic station K2 and subtropical station S1 in the North Pacific, which are both CO 2 sinks but in different oceanic settings. As analytical conditions, we assumed that the net loss of sinking PN was entirely due to abiotic fragmentation of particle aggregates to non-sinking particles and that the apparent 15 N enrichment associated with heterotrophic degradation in the suspended PN pools was vertically constant. The 15 N mass balance for the PN supply to the uppermost mesopelagic pool, derived from such constraints, allowed estimating the PN export by the mixed-layer pump, which was 1.6 times greater at K2 than at S1. However, its contribution to the total export (including gravitational PN sinking) from the surface layer was approximately 20% at both stations. Moreover, the ratio of PN supplied to the uppermost pool by the mixed-layer pump and by the fragmentation of particle aggregates was also similar at both stations, approximately 1:1. Using these ratios, together with separate observations of the mixed-layer pump-driven flux, it may be possible to estimate the efficiency of the particulate organic carbon transport due to the biological gravitational ... |
format |
Dataset |
author |
Yoshihisa Mino Chiho Sukigara Hajime Kawakami Masahide Wakita Makio C. Honda |
author_facet |
Yoshihisa Mino Chiho Sukigara Hajime Kawakami Masahide Wakita Makio C. Honda |
author_sort |
Yoshihisa Mino |
title |
DataSheet1_Mesopelagic particulate nitrogen dynamics in the subarctic and subtropical regions of the western North Pacific.docx |
title_short |
DataSheet1_Mesopelagic particulate nitrogen dynamics in the subarctic and subtropical regions of the western North Pacific.docx |
title_full |
DataSheet1_Mesopelagic particulate nitrogen dynamics in the subarctic and subtropical regions of the western North Pacific.docx |
title_fullStr |
DataSheet1_Mesopelagic particulate nitrogen dynamics in the subarctic and subtropical regions of the western North Pacific.docx |
title_full_unstemmed |
DataSheet1_Mesopelagic particulate nitrogen dynamics in the subarctic and subtropical regions of the western North Pacific.docx |
title_sort |
datasheet1_mesopelagic particulate nitrogen dynamics in the subarctic and subtropical regions of the western north pacific.docx |
publishDate |
2023 |
url |
https://doi.org/10.3389/feart.2023.1176889.s001 https://figshare.com/articles/dataset/DataSheet1_Mesopelagic_particulate_nitrogen_dynamics_in_the_subarctic_and_subtropical_regions_of_the_western_North_Pacific_docx/24172383 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Subarctic |
genre_facet |
Subarctic |
op_relation |
doi:10.3389/feart.2023.1176889.s001 https://figshare.com/articles/dataset/DataSheet1_Mesopelagic_particulate_nitrogen_dynamics_in_the_subarctic_and_subtropical_regions_of_the_western_North_Pacific_docx/24172383 |
op_rights |
CC BY 4.0 |
op_doi |
https://doi.org/10.3389/feart.2023.1176889.s001 |
_version_ |
1780741651647430656 |