Parameters for the depth of the ocean’s productive layer
Here we compare various parameters that are used to define the depth of the ocean’s productive layer, the euphotic zone, during the initiation of the spring phytoplankton bloom in the North Atlantic (47°N/20°W). These are (1) the compensation depth ( Zc , where gross photosynthesis balances autotrop...
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2023
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Online Access: | http://dx.doi.org/10.3389/fmars.2023.1052307 https://www.frontiersin.org/articles/10.3389/fmars.2023.1052307/full |
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crfrontiers:10.3389/fmars.2023.1052307 2024-02-11T10:06:32+01:00 Parameters for the depth of the ocean’s productive layer Marra, John F. Chamberlin, W. Sean Knudson, Carol A. Rhea, W. Joseph Ho, Cheng 2023 http://dx.doi.org/10.3389/fmars.2023.1052307 https://www.frontiersin.org/articles/10.3389/fmars.2023.1052307/full unknown Frontiers Media SA https://creativecommons.org/licenses/by/4.0/ Frontiers in Marine Science volume 10 ISSN 2296-7745 Ocean Engineering Water Science and Technology Aquatic Science Global and Planetary Change Oceanography journal-article 2023 crfrontiers https://doi.org/10.3389/fmars.2023.1052307 2024-01-26T09:56:09Z Here we compare various parameters that are used to define the depth of the ocean’s productive layer, the euphotic zone, during the initiation of the spring phytoplankton bloom in the North Atlantic (47°N/20°W). These are (1) the compensation depth ( Zc , where gross photosynthesis balances autotrophic respiration), (2) the depth horizon of 1% of surface photosynthetic active irradiance (Ed(0 - ,PAR), (3) depth horizon of 1% of surface Ed(488), and (4) the depth of the bottom of the fluorescence maximum. We also use two related parameters, the depth of the mixed layer and the ratio of integral gross production to integral respiration as a scaling factor for a proxy for the critical depth. Over the course of the observational period (25 April - 7 May, 1989), the mixed layer decreased from 162 to 20 m, and Zc decreased from 64 to 35 m. The depth of 1%Ed(0 - ,PAR) followed the trajectory of Zc , while Ed(488) and the depth of the bottom of the fluorescence maximum were about 10 m deeper, on average. These data support the criterion of the depth of “1%PAR” to describe the productive layer for more productive areas of the ocean. However, 1% of Ed(488) or the bottom of the fluorescence maximum could be used over a broader range of trophic conditions. Article in Journal/Newspaper North Atlantic Frontiers (Publisher) Frontiers in Marine Science 10 |
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Ocean Engineering Water Science and Technology Aquatic Science Global and Planetary Change Oceanography |
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Ocean Engineering Water Science and Technology Aquatic Science Global and Planetary Change Oceanography Marra, John F. Chamberlin, W. Sean Knudson, Carol A. Rhea, W. Joseph Ho, Cheng Parameters for the depth of the ocean’s productive layer |
topic_facet |
Ocean Engineering Water Science and Technology Aquatic Science Global and Planetary Change Oceanography |
description |
Here we compare various parameters that are used to define the depth of the ocean’s productive layer, the euphotic zone, during the initiation of the spring phytoplankton bloom in the North Atlantic (47°N/20°W). These are (1) the compensation depth ( Zc , where gross photosynthesis balances autotrophic respiration), (2) the depth horizon of 1% of surface photosynthetic active irradiance (Ed(0 - ,PAR), (3) depth horizon of 1% of surface Ed(488), and (4) the depth of the bottom of the fluorescence maximum. We also use two related parameters, the depth of the mixed layer and the ratio of integral gross production to integral respiration as a scaling factor for a proxy for the critical depth. Over the course of the observational period (25 April - 7 May, 1989), the mixed layer decreased from 162 to 20 m, and Zc decreased from 64 to 35 m. The depth of 1%Ed(0 - ,PAR) followed the trajectory of Zc , while Ed(488) and the depth of the bottom of the fluorescence maximum were about 10 m deeper, on average. These data support the criterion of the depth of “1%PAR” to describe the productive layer for more productive areas of the ocean. However, 1% of Ed(488) or the bottom of the fluorescence maximum could be used over a broader range of trophic conditions. |
format |
Article in Journal/Newspaper |
author |
Marra, John F. Chamberlin, W. Sean Knudson, Carol A. Rhea, W. Joseph Ho, Cheng |
author_facet |
Marra, John F. Chamberlin, W. Sean Knudson, Carol A. Rhea, W. Joseph Ho, Cheng |
author_sort |
Marra, John F. |
title |
Parameters for the depth of the ocean’s productive layer |
title_short |
Parameters for the depth of the ocean’s productive layer |
title_full |
Parameters for the depth of the ocean’s productive layer |
title_fullStr |
Parameters for the depth of the ocean’s productive layer |
title_full_unstemmed |
Parameters for the depth of the ocean’s productive layer |
title_sort |
parameters for the depth of the ocean’s productive layer |
publisher |
Frontiers Media SA |
publishDate |
2023 |
url |
http://dx.doi.org/10.3389/fmars.2023.1052307 https://www.frontiersin.org/articles/10.3389/fmars.2023.1052307/full |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Frontiers in Marine Science volume 10 ISSN 2296-7745 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3389/fmars.2023.1052307 |
container_title |
Frontiers in Marine Science |
container_volume |
10 |
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1790604313338314752 |