Surface chlorophyll anomalies induced by mesoscale eddy- wind interactions in the northern Norwegian Sea
The substantial productivity of the northern Norwegian Sea is closely related to its strong mesoscale eddy activity, but how eddies affect phytoplankton biomass levels in the upper ocean through horizontal and vertical transportmixing has not been well quantified. To assess mesoscale eddy induced oc...
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ftunivtroemsoe:oai:munin.uit.no:10037/26976 2023-05-15T17:46:59+02:00 Surface chlorophyll anomalies induced by mesoscale eddy- wind interactions in the northern Norwegian Sea Dong, Huizi Zhou, Meng Raj, Roshin Pappukutty Smith, Walker O Basedow, Sünnje Linnéa Ji, Rubao Ashjian, Carin Zhang, Zhaoru Hu, Ziyuan 2022-09-29 https://hdl.handle.net/10037/26976 https://doi.org/10.3389/fmars.2022.1002632 eng eng Frontiers Media Frontiers in Marine Science Dong H, Zhou M, Raj RR, Smith WO, Basedow SL, Ji R, Ashjian C, Zhang Z, Hu Z. Surface chlorophyll anomalies induced by mesoscale eddy- wind interactions in the northern Norwegian Sea. Frontiers in Marine Science. 2022;9:01-14 FRIDAID 2056953 doi:10.3389/fmars.2022.1002632 2296-7745 https://hdl.handle.net/10037/26976 Attribution 4.0 International (CC BY 4.0) openAccess Copyright 2022 The Author(s) https://creativecommons.org/licenses/by/4.0 CC-BY Journal article Tidsskriftartikkel Peer reviewed publishedVersion 2022 ftunivtroemsoe https://doi.org/10.3389/fmars.2022.1002632 2022-10-05T23:00:52Z The substantial productivity of the northern Norwegian Sea is closely related to its strong mesoscale eddy activity, but how eddies affect phytoplankton biomass levels in the upper ocean through horizontal and vertical transportmixing has not been well quantified. To assess mesoscale eddy induced ocean surface chlorophyll-a concentration (CHL) anomalies and modulation of eddywind interactions in the region, we constructed composite averaged CHL and wind anomalies from 3,841 snapshots of anticyclonic eddies (ACEs) and 2,727 snapshots of cyclonic eddies (CEs) over the period 2000-2020 using satellite altimetry, scatterometry, and ocean color products. Results indicate that eddy pumping induces negative (positive) CHL anomalies within ACEs (CEs), while Ekman pumping caused by wind-eddy interactions induces positive (negative) CHL anomalies within ACEs (CEs). Eddy-induced Ekman upwelling plays a key role in the unusual positive CHL anomalies within the ACEs and results in the vertical transport of nutrients that stimulates phytoplankton growth and elevated productivity of the region. Seasonal shoaling of the mixed layer depth (MLD) results in greater irradiance levels available for phytoplankton growth, thereby promoting spring blooms, which in combination with strong eddy activity leads to large CHL anomalies in May and June. The combined processes of wind-eddy interactions and seasonal shallowing of MLD play a key role in generating surface CHL anomalies and is a major factor in the regulation of phytoplankton biomass in the northern Norwegian Sea. Article in Journal/Newspaper Norwegian Sea University of Tromsø: Munin Open Research Archive Norwegian Sea Frontiers in Marine Science 9 |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
description |
The substantial productivity of the northern Norwegian Sea is closely related to its strong mesoscale eddy activity, but how eddies affect phytoplankton biomass levels in the upper ocean through horizontal and vertical transportmixing has not been well quantified. To assess mesoscale eddy induced ocean surface chlorophyll-a concentration (CHL) anomalies and modulation of eddywind interactions in the region, we constructed composite averaged CHL and wind anomalies from 3,841 snapshots of anticyclonic eddies (ACEs) and 2,727 snapshots of cyclonic eddies (CEs) over the period 2000-2020 using satellite altimetry, scatterometry, and ocean color products. Results indicate that eddy pumping induces negative (positive) CHL anomalies within ACEs (CEs), while Ekman pumping caused by wind-eddy interactions induces positive (negative) CHL anomalies within ACEs (CEs). Eddy-induced Ekman upwelling plays a key role in the unusual positive CHL anomalies within the ACEs and results in the vertical transport of nutrients that stimulates phytoplankton growth and elevated productivity of the region. Seasonal shoaling of the mixed layer depth (MLD) results in greater irradiance levels available for phytoplankton growth, thereby promoting spring blooms, which in combination with strong eddy activity leads to large CHL anomalies in May and June. The combined processes of wind-eddy interactions and seasonal shallowing of MLD play a key role in generating surface CHL anomalies and is a major factor in the regulation of phytoplankton biomass in the northern Norwegian Sea. |
format |
Article in Journal/Newspaper |
author |
Dong, Huizi Zhou, Meng Raj, Roshin Pappukutty Smith, Walker O Basedow, Sünnje Linnéa Ji, Rubao Ashjian, Carin Zhang, Zhaoru Hu, Ziyuan |
spellingShingle |
Dong, Huizi Zhou, Meng Raj, Roshin Pappukutty Smith, Walker O Basedow, Sünnje Linnéa Ji, Rubao Ashjian, Carin Zhang, Zhaoru Hu, Ziyuan Surface chlorophyll anomalies induced by mesoscale eddy- wind interactions in the northern Norwegian Sea |
author_facet |
Dong, Huizi Zhou, Meng Raj, Roshin Pappukutty Smith, Walker O Basedow, Sünnje Linnéa Ji, Rubao Ashjian, Carin Zhang, Zhaoru Hu, Ziyuan |
author_sort |
Dong, Huizi |
title |
Surface chlorophyll anomalies induced by mesoscale eddy- wind interactions in the northern Norwegian Sea |
title_short |
Surface chlorophyll anomalies induced by mesoscale eddy- wind interactions in the northern Norwegian Sea |
title_full |
Surface chlorophyll anomalies induced by mesoscale eddy- wind interactions in the northern Norwegian Sea |
title_fullStr |
Surface chlorophyll anomalies induced by mesoscale eddy- wind interactions in the northern Norwegian Sea |
title_full_unstemmed |
Surface chlorophyll anomalies induced by mesoscale eddy- wind interactions in the northern Norwegian Sea |
title_sort |
surface chlorophyll anomalies induced by mesoscale eddy- wind interactions in the northern norwegian sea |
publisher |
Frontiers Media |
publishDate |
2022 |
url |
https://hdl.handle.net/10037/26976 https://doi.org/10.3389/fmars.2022.1002632 |
geographic |
Norwegian Sea |
geographic_facet |
Norwegian Sea |
genre |
Norwegian Sea |
genre_facet |
Norwegian Sea |
op_relation |
Frontiers in Marine Science Dong H, Zhou M, Raj RR, Smith WO, Basedow SL, Ji R, Ashjian C, Zhang Z, Hu Z. Surface chlorophyll anomalies induced by mesoscale eddy- wind interactions in the northern Norwegian Sea. Frontiers in Marine Science. 2022;9:01-14 FRIDAID 2056953 doi:10.3389/fmars.2022.1002632 2296-7745 https://hdl.handle.net/10037/26976 |
op_rights |
Attribution 4.0 International (CC BY 4.0) openAccess Copyright 2022 The Author(s) https://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3389/fmars.2022.1002632 |
container_title |
Frontiers in Marine Science |
container_volume |
9 |
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1766151057565548544 |