Substantial Sub-Surface Chlorophyll Patch Sustained by Vertical Nutrient Fluxes in Fram Strait Observed With an Autonomous Underwater Vehicle
We present results from a coordinated frontal survey in Fram Strait in summer 2016 using an autonomous underwater vehicle (AUV) combined with shipboard and zodiac-based hydrographic measurements. Based on satellite information, we identified a front between warm Atlantic Water and cold Polar Water....
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Online Access: | https://epic.awi.de/id/eprint/54623/ https://doi.org/10.3389/fmars.2021.605225 https://hdl.handle.net/10013/epic.a3bcd6c1-d5a2-4cda-ba96-61cb3125a6d0 |
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ftawi:oai:epic.awi.de:54623 2024-03-24T09:01:59+00:00 Substantial Sub-Surface Chlorophyll Patch Sustained by Vertical Nutrient Fluxes in Fram Strait Observed With an Autonomous Underwater Vehicle Tippenhauer, Sandra Janout, Markus Manita, Chouksey Torres-Valdes, Sinhue Fong, Allison Wulff, Thorben 2021-09 https://epic.awi.de/id/eprint/54623/ https://doi.org/10.3389/fmars.2021.605225 https://hdl.handle.net/10013/epic.a3bcd6c1-d5a2-4cda-ba96-61cb3125a6d0 unknown Tippenhauer, S. orcid:0000-0003-3405-6275 , Janout, M. orcid:0000-0003-4908-2855 , Manita, C. , Torres-Valdes, S. orcid:0000-0003-2749-4170 , Fong, A. and Wulff, T. orcid:0000-0002-1871-0719 (2021) Substantial Sub-Surface Chlorophyll Patch Sustained by Vertical Nutrient Fluxes in Fram Strait Observed With an Autonomous Underwater Vehicle , Frontiers in Marine Science . doi:10.3389/fmars.2021.605225 <https://doi.org/10.3389/fmars.2021.605225> , hdl:10013/epic.a3bcd6c1-d5a2-4cda-ba96-61cb3125a6d0 EPIC3Frontiers in Marine Science Article peerRev 2021 ftawi https://doi.org/10.3389/fmars.2021.605225 2024-02-27T09:55:26Z We present results from a coordinated frontal survey in Fram Strait in summer 2016 using an autonomous underwater vehicle (AUV) combined with shipboard and zodiac-based hydrographic measurements. Based on satellite information, we identified a front between warm Atlantic Water and cold Polar Water. The AUV, equipped with oceanographic and biogeochemical sensors, profiled the upper 50 m along a 10 km-long cross-front oriented transect resulting in a high-resolution snapshot of the upper ocean. The transect was dominated by a 6 km-wide, 10 m-thick subsurface patch of high chlorophyll, located near the euphotic depth within a band of cold water. Nitrate was depleted in the surface, but abundant below the pycnocline. Potential vorticity and Richardson number estimates indicate conditions favorable for vertical mixing, which indicates that the high chlorophyll patch may have been sustained by upward nitrate fluxes. Our observations underline the complex hydrographic and biogeochemical structure in a region featuring fronts and meanders, and further underline the patchy and small-scale nature of subsurface phytoplankton blooms potentially fueled by submesoscale dynamics, which are easily missed by traditional surveys and satellite missions. Article in Journal/Newspaper Fram Strait Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Frontiers in Marine Science 8 |
institution |
Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
We present results from a coordinated frontal survey in Fram Strait in summer 2016 using an autonomous underwater vehicle (AUV) combined with shipboard and zodiac-based hydrographic measurements. Based on satellite information, we identified a front between warm Atlantic Water and cold Polar Water. The AUV, equipped with oceanographic and biogeochemical sensors, profiled the upper 50 m along a 10 km-long cross-front oriented transect resulting in a high-resolution snapshot of the upper ocean. The transect was dominated by a 6 km-wide, 10 m-thick subsurface patch of high chlorophyll, located near the euphotic depth within a band of cold water. Nitrate was depleted in the surface, but abundant below the pycnocline. Potential vorticity and Richardson number estimates indicate conditions favorable for vertical mixing, which indicates that the high chlorophyll patch may have been sustained by upward nitrate fluxes. Our observations underline the complex hydrographic and biogeochemical structure in a region featuring fronts and meanders, and further underline the patchy and small-scale nature of subsurface phytoplankton blooms potentially fueled by submesoscale dynamics, which are easily missed by traditional surveys and satellite missions. |
format |
Article in Journal/Newspaper |
author |
Tippenhauer, Sandra Janout, Markus Manita, Chouksey Torres-Valdes, Sinhue Fong, Allison Wulff, Thorben |
spellingShingle |
Tippenhauer, Sandra Janout, Markus Manita, Chouksey Torres-Valdes, Sinhue Fong, Allison Wulff, Thorben Substantial Sub-Surface Chlorophyll Patch Sustained by Vertical Nutrient Fluxes in Fram Strait Observed With an Autonomous Underwater Vehicle |
author_facet |
Tippenhauer, Sandra Janout, Markus Manita, Chouksey Torres-Valdes, Sinhue Fong, Allison Wulff, Thorben |
author_sort |
Tippenhauer, Sandra |
title |
Substantial Sub-Surface Chlorophyll Patch Sustained by Vertical Nutrient Fluxes in Fram Strait Observed With an Autonomous Underwater Vehicle |
title_short |
Substantial Sub-Surface Chlorophyll Patch Sustained by Vertical Nutrient Fluxes in Fram Strait Observed With an Autonomous Underwater Vehicle |
title_full |
Substantial Sub-Surface Chlorophyll Patch Sustained by Vertical Nutrient Fluxes in Fram Strait Observed With an Autonomous Underwater Vehicle |
title_fullStr |
Substantial Sub-Surface Chlorophyll Patch Sustained by Vertical Nutrient Fluxes in Fram Strait Observed With an Autonomous Underwater Vehicle |
title_full_unstemmed |
Substantial Sub-Surface Chlorophyll Patch Sustained by Vertical Nutrient Fluxes in Fram Strait Observed With an Autonomous Underwater Vehicle |
title_sort |
substantial sub-surface chlorophyll patch sustained by vertical nutrient fluxes in fram strait observed with an autonomous underwater vehicle |
publishDate |
2021 |
url |
https://epic.awi.de/id/eprint/54623/ https://doi.org/10.3389/fmars.2021.605225 https://hdl.handle.net/10013/epic.a3bcd6c1-d5a2-4cda-ba96-61cb3125a6d0 |
genre |
Fram Strait |
genre_facet |
Fram Strait |
op_source |
EPIC3Frontiers in Marine Science |
op_relation |
Tippenhauer, S. orcid:0000-0003-3405-6275 , Janout, M. orcid:0000-0003-4908-2855 , Manita, C. , Torres-Valdes, S. orcid:0000-0003-2749-4170 , Fong, A. and Wulff, T. orcid:0000-0002-1871-0719 (2021) Substantial Sub-Surface Chlorophyll Patch Sustained by Vertical Nutrient Fluxes in Fram Strait Observed With an Autonomous Underwater Vehicle , Frontiers in Marine Science . doi:10.3389/fmars.2021.605225 <https://doi.org/10.3389/fmars.2021.605225> , hdl:10013/epic.a3bcd6c1-d5a2-4cda-ba96-61cb3125a6d0 |
op_doi |
https://doi.org/10.3389/fmars.2021.605225 |
container_title |
Frontiers in Marine Science |
container_volume |
8 |
_version_ |
1794402215464534016 |