Optical properties of sea ice doped with black carbon – an experimental and radiative-transfer modelling comparison
Radiative-transfer calculations of the light reflectivity and extinction coefficient in laboratory-generated sea ice doped with and without black carbon demonstrate that the radiative-transfer model TUV-snow can be used to predict the light reflectance and extinction coefficient as a function of wav...
Published in: | The Cryosphere |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2017
|
Subjects: | |
Online Access: | https://doi.org/10.5194/tc-11-2867-2017 https://doaj.org/article/899aead00a2647ff992b10cba3ea1617 |
id |
ftdoajarticles:oai:doaj.org/article:899aead00a2647ff992b10cba3ea1617 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:899aead00a2647ff992b10cba3ea1617 2023-05-15T18:16:19+02:00 Optical properties of sea ice doped with black carbon – an experimental and radiative-transfer modelling comparison A. A. Marks M. L. Lamare M. D. King 2017-12-01T00:00:00Z https://doi.org/10.5194/tc-11-2867-2017 https://doaj.org/article/899aead00a2647ff992b10cba3ea1617 EN eng Copernicus Publications https://www.the-cryosphere.net/11/2867/2017/tc-11-2867-2017.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-11-2867-2017 1994-0416 1994-0424 https://doaj.org/article/899aead00a2647ff992b10cba3ea1617 The Cryosphere, Vol 11, Pp 2867-2881 (2017) Environmental sciences GE1-350 Geology QE1-996.5 article 2017 ftdoajarticles https://doi.org/10.5194/tc-11-2867-2017 2022-12-31T16:30:42Z Radiative-transfer calculations of the light reflectivity and extinction coefficient in laboratory-generated sea ice doped with and without black carbon demonstrate that the radiative-transfer model TUV-snow can be used to predict the light reflectance and extinction coefficient as a function of wavelength. The sea ice is representative of first-year sea ice containing typical amounts of black carbon and other light-absorbing impurities. The experiments give confidence in the application of the model to predict albedo of other sea ice fabrics. Sea ices, ∼ 30 cm thick, were generated in the Royal Holloway Sea Ice Simulator ( ∼ 2000 L tanks) with scattering cross sections measured between 0.012 and 0.032 m 2 kg −1 for four ices. Sea ices were generated with and without ∼ 5 cm upper layers containing particulate black carbon. Nadir reflectances between 0.60 and 0.78 were measured along with extinction coefficients of 0.1 to 0.03 cm −1 ( e -folding depths of 10–30 cm) at a wavelength of 500 nm. Values were measured between light wavelengths of 350 and 650 nm. The sea ices generated in the Royal Holloway Sea Ice Simulator were found to be representative of natural sea ices. Particulate black carbon at mass ratios of ∼ 75, ∼ 150 and ∼ 300 ng g −1 in a 5 cm ice layer lowers the albedo to 97, 90 and 79 % of the reflectivity of an undoped <q>clean</q> sea ice (at a wavelength of 500 nm). Article in Journal/Newspaper Sea ice The Cryosphere Directory of Open Access Journals: DOAJ Articles Holloway ENVELOPE(163.600,163.600,-84.750,-84.750) The Cryosphere 11 6 2867 2881 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental sciences GE1-350 Geology QE1-996.5 |
spellingShingle |
Environmental sciences GE1-350 Geology QE1-996.5 A. A. Marks M. L. Lamare M. D. King Optical properties of sea ice doped with black carbon – an experimental and radiative-transfer modelling comparison |
topic_facet |
Environmental sciences GE1-350 Geology QE1-996.5 |
description |
Radiative-transfer calculations of the light reflectivity and extinction coefficient in laboratory-generated sea ice doped with and without black carbon demonstrate that the radiative-transfer model TUV-snow can be used to predict the light reflectance and extinction coefficient as a function of wavelength. The sea ice is representative of first-year sea ice containing typical amounts of black carbon and other light-absorbing impurities. The experiments give confidence in the application of the model to predict albedo of other sea ice fabrics. Sea ices, ∼ 30 cm thick, were generated in the Royal Holloway Sea Ice Simulator ( ∼ 2000 L tanks) with scattering cross sections measured between 0.012 and 0.032 m 2 kg −1 for four ices. Sea ices were generated with and without ∼ 5 cm upper layers containing particulate black carbon. Nadir reflectances between 0.60 and 0.78 were measured along with extinction coefficients of 0.1 to 0.03 cm −1 ( e -folding depths of 10–30 cm) at a wavelength of 500 nm. Values were measured between light wavelengths of 350 and 650 nm. The sea ices generated in the Royal Holloway Sea Ice Simulator were found to be representative of natural sea ices. Particulate black carbon at mass ratios of ∼ 75, ∼ 150 and ∼ 300 ng g −1 in a 5 cm ice layer lowers the albedo to 97, 90 and 79 % of the reflectivity of an undoped <q>clean</q> sea ice (at a wavelength of 500 nm). |
format |
Article in Journal/Newspaper |
author |
A. A. Marks M. L. Lamare M. D. King |
author_facet |
A. A. Marks M. L. Lamare M. D. King |
author_sort |
A. A. Marks |
title |
Optical properties of sea ice doped with black carbon – an experimental and radiative-transfer modelling comparison |
title_short |
Optical properties of sea ice doped with black carbon – an experimental and radiative-transfer modelling comparison |
title_full |
Optical properties of sea ice doped with black carbon – an experimental and radiative-transfer modelling comparison |
title_fullStr |
Optical properties of sea ice doped with black carbon – an experimental and radiative-transfer modelling comparison |
title_full_unstemmed |
Optical properties of sea ice doped with black carbon – an experimental and radiative-transfer modelling comparison |
title_sort |
optical properties of sea ice doped with black carbon – an experimental and radiative-transfer modelling comparison |
publisher |
Copernicus Publications |
publishDate |
2017 |
url |
https://doi.org/10.5194/tc-11-2867-2017 https://doaj.org/article/899aead00a2647ff992b10cba3ea1617 |
long_lat |
ENVELOPE(163.600,163.600,-84.750,-84.750) |
geographic |
Holloway |
geographic_facet |
Holloway |
genre |
Sea ice The Cryosphere |
genre_facet |
Sea ice The Cryosphere |
op_source |
The Cryosphere, Vol 11, Pp 2867-2881 (2017) |
op_relation |
https://www.the-cryosphere.net/11/2867/2017/tc-11-2867-2017.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-11-2867-2017 1994-0416 1994-0424 https://doaj.org/article/899aead00a2647ff992b10cba3ea1617 |
op_doi |
https://doi.org/10.5194/tc-11-2867-2017 |
container_title |
The Cryosphere |
container_volume |
11 |
container_issue |
6 |
container_start_page |
2867 |
op_container_end_page |
2881 |
_version_ |
1766189860981309440 |