Midnight Sun to Polar Night: A Model of Seasonal Light in the Barents Sea
Arctic marine ecosystems are strongly influenced by the extreme seasonality of light in the region. Accurate determination of light is essential for building a comprehensive understanding of the dynamics of animal and aquatic algae populations. Current approaches to underwater light field parameteri...
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Online Access: | https://hdl.handle.net/10037/27609 https://doi.org/10.1029/2022MS003198 |
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ftunivtroemsoe:oai:munin.uit.no:10037/27609 2023-05-15T15:00:39+02:00 Midnight Sun to Polar Night: A Model of Seasonal Light in the Barents Sea Connan-McGinty, Stacey Banas, Neil S. Berge, Jørgen Cottier, Finlo Robert Grant, Stephen Johnsen, Geir Kopec, Tomasz Piotr Porter, Marie Mckee, David 2022-09-20 https://hdl.handle.net/10037/27609 https://doi.org/10.1029/2022MS003198 eng eng Wiley Journal of Advances in Modeling Earth Systems Norges forskningsråd: 300333 Norges forskningsråd: 276730 Norges forskningsråd: 245923 Norges forskningsråd: 223254 Connan-McGinty, Banas, Berge, Cottier, Grant, Johnsen, Kopec, Porter, Mckee D. Midnight Sun to Polar Night: A Model of Seasonal Light in the Barents Sea. Journal of Advances in Modeling Earth Systems. 2022;14(10) FRIDAID 2082544 doi:10.1029/2022MS003198 1942-2466 https://hdl.handle.net/10037/27609 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/10.1029/2022MS003198 2022-12-01T00:02:25Z Arctic marine ecosystems are strongly influenced by the extreme seasonality of light in the region. Accurate determination of light is essential for building a comprehensive understanding of the dynamics of animal and aquatic algae populations. Current approaches to underwater light field parameterisations rely upon shortwave radiation (300–3000 nm) estimates from satellites or surface radiometry measurements to populate full radiative transfer software. Due to the inaccessibility of many regions in the Arctic, measured data is not widely available. This study presents a model of spectrally resolved underwater light in ice-free conditions in the Barents Sea. Given a location and time, the model accounts for downwelling spectral irradiance in the photosynthetically active radiation (PAR, 400–700 nm) range (E D PAR ) at the ocean surface from solar, lunar, and galactic light sources, modulated by local cloud cover. We demonstrate the ability to extend over the full year into the period of Polar Night, validated in both broadband PAR and spectral domains. Using a bio-optical model of diffuse attenuation developed for the Barents Sea, we show accurate calculations to depth for inhomogeneous water columns over a spatial-temporal range, validated against time series irradiance data from the ArcLight observatory in Ny-Ålesund, Svalbard and in-situ irradiance sensors deployed in the Barents Sea. Finally, in comparison to state-of-the-art radiative transfer models, averaged over the water column we demonstrate a typical mean absolute error of <1 μmol m −2 s −1 in E D PAR for overcast conditions (<6 μmol m −2 s −1 for clear-sky) and reduced execution time of factor 20. Article in Journal/Newspaper Arctic Barents Sea Ny Ålesund Ny-Ålesund polar night Svalbard midnight sun University of Tromsø: Munin Open Research Archive Arctic Svalbard Barents Sea Ny-Ålesund Journal of Advances in Modeling Earth Systems 14 10 |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
description |
Arctic marine ecosystems are strongly influenced by the extreme seasonality of light in the region. Accurate determination of light is essential for building a comprehensive understanding of the dynamics of animal and aquatic algae populations. Current approaches to underwater light field parameterisations rely upon shortwave radiation (300–3000 nm) estimates from satellites or surface radiometry measurements to populate full radiative transfer software. Due to the inaccessibility of many regions in the Arctic, measured data is not widely available. This study presents a model of spectrally resolved underwater light in ice-free conditions in the Barents Sea. Given a location and time, the model accounts for downwelling spectral irradiance in the photosynthetically active radiation (PAR, 400–700 nm) range (E D PAR ) at the ocean surface from solar, lunar, and galactic light sources, modulated by local cloud cover. We demonstrate the ability to extend over the full year into the period of Polar Night, validated in both broadband PAR and spectral domains. Using a bio-optical model of diffuse attenuation developed for the Barents Sea, we show accurate calculations to depth for inhomogeneous water columns over a spatial-temporal range, validated against time series irradiance data from the ArcLight observatory in Ny-Ålesund, Svalbard and in-situ irradiance sensors deployed in the Barents Sea. Finally, in comparison to state-of-the-art radiative transfer models, averaged over the water column we demonstrate a typical mean absolute error of <1 μmol m −2 s −1 in E D PAR for overcast conditions (<6 μmol m −2 s −1 for clear-sky) and reduced execution time of factor 20. |
format |
Article in Journal/Newspaper |
author |
Connan-McGinty, Stacey Banas, Neil S. Berge, Jørgen Cottier, Finlo Robert Grant, Stephen Johnsen, Geir Kopec, Tomasz Piotr Porter, Marie Mckee, David |
spellingShingle |
Connan-McGinty, Stacey Banas, Neil S. Berge, Jørgen Cottier, Finlo Robert Grant, Stephen Johnsen, Geir Kopec, Tomasz Piotr Porter, Marie Mckee, David Midnight Sun to Polar Night: A Model of Seasonal Light in the Barents Sea |
author_facet |
Connan-McGinty, Stacey Banas, Neil S. Berge, Jørgen Cottier, Finlo Robert Grant, Stephen Johnsen, Geir Kopec, Tomasz Piotr Porter, Marie Mckee, David |
author_sort |
Connan-McGinty, Stacey |
title |
Midnight Sun to Polar Night: A Model of Seasonal Light in the Barents Sea |
title_short |
Midnight Sun to Polar Night: A Model of Seasonal Light in the Barents Sea |
title_full |
Midnight Sun to Polar Night: A Model of Seasonal Light in the Barents Sea |
title_fullStr |
Midnight Sun to Polar Night: A Model of Seasonal Light in the Barents Sea |
title_full_unstemmed |
Midnight Sun to Polar Night: A Model of Seasonal Light in the Barents Sea |
title_sort |
midnight sun to polar night: a model of seasonal light in the barents sea |
publisher |
Wiley |
publishDate |
2022 |
url |
https://hdl.handle.net/10037/27609 https://doi.org/10.1029/2022MS003198 |
geographic |
Arctic Svalbard Barents Sea Ny-Ålesund |
geographic_facet |
Arctic Svalbard Barents Sea Ny-Ålesund |
genre |
Arctic Barents Sea Ny Ålesund Ny-Ålesund polar night Svalbard midnight sun |
genre_facet |
Arctic Barents Sea Ny Ålesund Ny-Ålesund polar night Svalbard midnight sun |
op_relation |
Journal of Advances in Modeling Earth Systems Norges forskningsråd: 300333 Norges forskningsråd: 276730 Norges forskningsråd: 245923 Norges forskningsråd: 223254 Connan-McGinty, Banas, Berge, Cottier, Grant, Johnsen, Kopec, Porter, Mckee D. Midnight Sun to Polar Night: A Model of Seasonal Light in the Barents Sea. Journal of Advances in Modeling Earth Systems. 2022;14(10) FRIDAID 2082544 doi:10.1029/2022MS003198 1942-2466 https://hdl.handle.net/10037/27609 |
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/10.1029/2022MS003198 |
container_title |
Journal of Advances in Modeling Earth Systems |
container_volume |
14 |
container_issue |
10 |
_version_ |
1766332727161782272 |