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 autotrophi...
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2023
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Online Access: | https://doi.org/10.3389/fmars.2023.1052307 https://doaj.org/article/5a68c310ce034432bf53ba656586749c |
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ftdoajarticles:oai:doaj.org/article:5a68c310ce034432bf53ba656586749c 2023-05-15T17:34:40+02:00 Parameters for the depth of the ocean’s productive layer John F. Marra W. Sean Chamberlin Carol A. Knudson W. Joseph Rhea Cheng Ho 2023-04-01T00:00:00Z https://doi.org/10.3389/fmars.2023.1052307 https://doaj.org/article/5a68c310ce034432bf53ba656586749c EN eng Frontiers Media S.A. https://www.frontiersin.org/articles/10.3389/fmars.2023.1052307/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2023.1052307 https://doaj.org/article/5a68c310ce034432bf53ba656586749c Frontiers in Marine Science, Vol 10 (2023) radiometer productivity respiration euphotic depth PAR fluorescence Science Q General. Including nature conservation geographical distribution QH1-199.5 article 2023 ftdoajarticles https://doi.org/10.3389/fmars.2023.1052307 2023-04-09T00:34:57Z 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 Directory of Open Access Journals: DOAJ Articles Frontiers in Marine Science 10 |
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Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
radiometer productivity respiration euphotic depth PAR fluorescence Science Q General. Including nature conservation geographical distribution QH1-199.5 |
spellingShingle |
radiometer productivity respiration euphotic depth PAR fluorescence Science Q General. Including nature conservation geographical distribution QH1-199.5 John F. Marra W. Sean Chamberlin Carol A. Knudson W. Joseph Rhea Cheng Ho Parameters for the depth of the ocean’s productive layer |
topic_facet |
radiometer productivity respiration euphotic depth PAR fluorescence Science Q General. Including nature conservation geographical distribution QH1-199.5 |
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 |
John F. Marra W. Sean Chamberlin Carol A. Knudson W. Joseph Rhea Cheng Ho |
author_facet |
John F. Marra W. Sean Chamberlin Carol A. Knudson W. Joseph Rhea Cheng Ho |
author_sort |
John F. Marra |
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 S.A. |
publishDate |
2023 |
url |
https://doi.org/10.3389/fmars.2023.1052307 https://doaj.org/article/5a68c310ce034432bf53ba656586749c |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Frontiers in Marine Science, Vol 10 (2023) |
op_relation |
https://www.frontiersin.org/articles/10.3389/fmars.2023.1052307/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2023.1052307 https://doaj.org/article/5a68c310ce034432bf53ba656586749c |
op_doi |
https://doi.org/10.3389/fmars.2023.1052307 |
container_title |
Frontiers in Marine Science |
container_volume |
10 |
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1766133578534486016 |