Estimating Underwater Light Regime under Spatially Heterogeneous Sea Ice in the Arctic
The vertical diffuse attenuation coefficient for downward plane irradiance ( K d ) is an apparent optical property commonly used in primary production models to propagate incident solar radiation in the water column. In open water, estimating K d is relatively straightforward when a vertical profile...
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ftmdpi:oai:mdpi.com:/2076-3417/8/12/2693/ 2023-08-20T04:04:23+02:00 Estimating Underwater Light Regime under Spatially Heterogeneous Sea Ice in the Arctic Philippe Massicotte Guislain Bécu Simon Lambert-Girard Edouard Leymarie Marcel Babin agris 2018-12-19 application/pdf https://doi.org/10.3390/app8122693 EN eng Multidisciplinary Digital Publishing Institute Optics and Lasers https://dx.doi.org/10.3390/app8122693 https://creativecommons.org/licenses/by/4.0/ Applied Sciences; Volume 8; Issue 12; Pages: 2693 apparent optical properties 3D Monte Carlo numerical simulations downward irradiance upward radiance sea ice heterogeneity vertical attenuation coefficient melt ponds Text 2018 ftmdpi https://doi.org/10.3390/app8122693 2023-07-31T21:55:05Z The vertical diffuse attenuation coefficient for downward plane irradiance ( K d ) is an apparent optical property commonly used in primary production models to propagate incident solar radiation in the water column. In open water, estimating K d is relatively straightforward when a vertical profile of measurements of downward irradiance, E d , is available. In the Arctic, the ice pack is characterized by a complex mosaic composed of sea ice with snow, ridges, melt ponds, and leads. Due to the resulting spatially heterogeneous light field in the top meters of the water column, it is difficult to measure at single-point locations meaningful K d values that allow predicting average irradiance at any depth. The main objective of this work is to propose a new method to estimate average irradiance over large spatially heterogeneous area as it would be seen by drifting phytoplankton. Using both in situ data and 3D Monte Carlo numerical simulations of radiative transfer, we show that (1) the large-area average vertical profile of downward irradiance, E d ¯ ( z ) , under heterogeneous sea ice cover can be represented by a single-term exponential function and (2) the vertical attenuation coefficient for upward radiance ( K L u ), which is up to two times less influenced by a heterogeneous incident light field than K d in the vicinity of a melt pond, can be used as a proxy to estimate E d ¯ ( z ) in the water column. Text Arctic ice pack Phytoplankton Sea ice MDPI Open Access Publishing Arctic Applied Sciences 8 12 2693 |
institution |
Open Polar |
collection |
MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
apparent optical properties 3D Monte Carlo numerical simulations downward irradiance upward radiance sea ice heterogeneity vertical attenuation coefficient melt ponds |
spellingShingle |
apparent optical properties 3D Monte Carlo numerical simulations downward irradiance upward radiance sea ice heterogeneity vertical attenuation coefficient melt ponds Philippe Massicotte Guislain Bécu Simon Lambert-Girard Edouard Leymarie Marcel Babin Estimating Underwater Light Regime under Spatially Heterogeneous Sea Ice in the Arctic |
topic_facet |
apparent optical properties 3D Monte Carlo numerical simulations downward irradiance upward radiance sea ice heterogeneity vertical attenuation coefficient melt ponds |
description |
The vertical diffuse attenuation coefficient for downward plane irradiance ( K d ) is an apparent optical property commonly used in primary production models to propagate incident solar radiation in the water column. In open water, estimating K d is relatively straightforward when a vertical profile of measurements of downward irradiance, E d , is available. In the Arctic, the ice pack is characterized by a complex mosaic composed of sea ice with snow, ridges, melt ponds, and leads. Due to the resulting spatially heterogeneous light field in the top meters of the water column, it is difficult to measure at single-point locations meaningful K d values that allow predicting average irradiance at any depth. The main objective of this work is to propose a new method to estimate average irradiance over large spatially heterogeneous area as it would be seen by drifting phytoplankton. Using both in situ data and 3D Monte Carlo numerical simulations of radiative transfer, we show that (1) the large-area average vertical profile of downward irradiance, E d ¯ ( z ) , under heterogeneous sea ice cover can be represented by a single-term exponential function and (2) the vertical attenuation coefficient for upward radiance ( K L u ), which is up to two times less influenced by a heterogeneous incident light field than K d in the vicinity of a melt pond, can be used as a proxy to estimate E d ¯ ( z ) in the water column. |
format |
Text |
author |
Philippe Massicotte Guislain Bécu Simon Lambert-Girard Edouard Leymarie Marcel Babin |
author_facet |
Philippe Massicotte Guislain Bécu Simon Lambert-Girard Edouard Leymarie Marcel Babin |
author_sort |
Philippe Massicotte |
title |
Estimating Underwater Light Regime under Spatially Heterogeneous Sea Ice in the Arctic |
title_short |
Estimating Underwater Light Regime under Spatially Heterogeneous Sea Ice in the Arctic |
title_full |
Estimating Underwater Light Regime under Spatially Heterogeneous Sea Ice in the Arctic |
title_fullStr |
Estimating Underwater Light Regime under Spatially Heterogeneous Sea Ice in the Arctic |
title_full_unstemmed |
Estimating Underwater Light Regime under Spatially Heterogeneous Sea Ice in the Arctic |
title_sort |
estimating underwater light regime under spatially heterogeneous sea ice in the arctic |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2018 |
url |
https://doi.org/10.3390/app8122693 |
op_coverage |
agris |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic ice pack Phytoplankton Sea ice |
genre_facet |
Arctic ice pack Phytoplankton Sea ice |
op_source |
Applied Sciences; Volume 8; Issue 12; Pages: 2693 |
op_relation |
Optics and Lasers https://dx.doi.org/10.3390/app8122693 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/app8122693 |
container_title |
Applied Sciences |
container_volume |
8 |
container_issue |
12 |
container_start_page |
2693 |
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1774714768418930688 |