Geometric effects of an inhomogeneous sea ice cover on the under ice light field
Light measurements in the ocean provide crucial information about the energy fluxes in the climate and ecosystem. Currently radiative transfer problems are usually considered in horizontally homogeneous layers although it is known to be a crude assumption in many cases. In this paper, we examine the...
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ftdoajarticles:oai:doaj.org/article:7b92a2707b4845a3a2b9afeea92a25cc 2023-05-15T18:17:29+02:00 Geometric effects of an inhomogeneous sea ice cover on the under ice light field Christian eKatlein Donald K Perovich Marcel eNicolaus 2016-02-01T00:00:00Z https://doi.org/10.3389/feart.2016.00006 https://doaj.org/article/7b92a2707b4845a3a2b9afeea92a25cc EN eng Frontiers Media S.A. http://journal.frontiersin.org/Journal/10.3389/feart.2016.00006/full https://doaj.org/toc/2296-6463 2296-6463 doi:10.3389/feart.2016.00006 https://doaj.org/article/7b92a2707b4845a3a2b9afeea92a25cc Frontiers in Earth Science, Vol 4 (2016) optics irradiance spatial variability Extinction coefficient Inherent optical properties Science Q article 2016 ftdoajarticles https://doi.org/10.3389/feart.2016.00006 2022-12-31T13:11:24Z Light measurements in the ocean provide crucial information about the energy fluxes in the climate and ecosystem. Currently radiative transfer problems are usually considered in horizontally homogeneous layers although it is known to be a crude assumption in many cases. In this paper, we examine the effects of a horizontally inhomogeneous sea ice layer on the light field in the water underneath. We implemented a three dimensional model, capable to simulate the light field underneath arbitrary surface geometries using ray optics. The results show clear effects of the measurement geometry on measured fluxes obtained with different sensor types, which need to be taken into account for the correct interpretation of the data. Radiance sensors are able to better sense the spatial variability of ice optical properties as compared to irradiance sensors. Furthermore we show that the determination of the light extinction coefficient of water from vertical profiles is complicated under a horizontally inhomogeneous ice cover. This uncertainty in optical properties of the water, as well as the measurement geometry also limits the possibility to correct light measurements taken at depth for the influence of water in between the sea ice and the sensor. Article in Journal/Newspaper Sea ice Directory of Open Access Journals: DOAJ Articles Frontiers in Earth Science 4 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
optics irradiance spatial variability Extinction coefficient Inherent optical properties Science Q |
spellingShingle |
optics irradiance spatial variability Extinction coefficient Inherent optical properties Science Q Christian eKatlein Donald K Perovich Marcel eNicolaus Geometric effects of an inhomogeneous sea ice cover on the under ice light field |
topic_facet |
optics irradiance spatial variability Extinction coefficient Inherent optical properties Science Q |
description |
Light measurements in the ocean provide crucial information about the energy fluxes in the climate and ecosystem. Currently radiative transfer problems are usually considered in horizontally homogeneous layers although it is known to be a crude assumption in many cases. In this paper, we examine the effects of a horizontally inhomogeneous sea ice layer on the light field in the water underneath. We implemented a three dimensional model, capable to simulate the light field underneath arbitrary surface geometries using ray optics. The results show clear effects of the measurement geometry on measured fluxes obtained with different sensor types, which need to be taken into account for the correct interpretation of the data. Radiance sensors are able to better sense the spatial variability of ice optical properties as compared to irradiance sensors. Furthermore we show that the determination of the light extinction coefficient of water from vertical profiles is complicated under a horizontally inhomogeneous ice cover. This uncertainty in optical properties of the water, as well as the measurement geometry also limits the possibility to correct light measurements taken at depth for the influence of water in between the sea ice and the sensor. |
format |
Article in Journal/Newspaper |
author |
Christian eKatlein Donald K Perovich Marcel eNicolaus |
author_facet |
Christian eKatlein Donald K Perovich Marcel eNicolaus |
author_sort |
Christian eKatlein |
title |
Geometric effects of an inhomogeneous sea ice cover on the under ice light field |
title_short |
Geometric effects of an inhomogeneous sea ice cover on the under ice light field |
title_full |
Geometric effects of an inhomogeneous sea ice cover on the under ice light field |
title_fullStr |
Geometric effects of an inhomogeneous sea ice cover on the under ice light field |
title_full_unstemmed |
Geometric effects of an inhomogeneous sea ice cover on the under ice light field |
title_sort |
geometric effects of an inhomogeneous sea ice cover on the under ice light field |
publisher |
Frontiers Media S.A. |
publishDate |
2016 |
url |
https://doi.org/10.3389/feart.2016.00006 https://doaj.org/article/7b92a2707b4845a3a2b9afeea92a25cc |
genre |
Sea ice |
genre_facet |
Sea ice |
op_source |
Frontiers in Earth Science, Vol 4 (2016) |
op_relation |
http://journal.frontiersin.org/Journal/10.3389/feart.2016.00006/full https://doaj.org/toc/2296-6463 2296-6463 doi:10.3389/feart.2016.00006 https://doaj.org/article/7b92a2707b4845a3a2b9afeea92a25cc |
op_doi |
https://doi.org/10.3389/feart.2016.00006 |
container_title |
Frontiers in Earth Science |
container_volume |
4 |
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1766191727022964736 |