Sea Ice Brightness Temperature as a Function of Ice Thickness: Computed curves for AMSR-E and SMOS (frequencies from 1.4 to 89 GHz)

The relationship between sea ice thickness and microwave brightness temperature is explored. Parameterized ice profiles are fed to a radiative-transfer-based sea ice emissivity model (Microwave Emmission of Layered Snowpack, MEMLS). Complex permittivities, required as input for the simulation, are d...

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Bibliographic Details
Main Authors: Mills, Peter, Heygster, Georg
Format: Report
Language:unknown
Published: arXiv 2012
Subjects:
Atmospheric and Oceanic Physics physics.ao-ph
FOS Physical sciences
Sea ice
Online Access:https://dx.doi.org/10.48550/arxiv.1202.3802
https://arxiv.org/abs/1202.3802
id ftdatacite:10.48550/arxiv.1202.3802
record_format openpolar
spelling ftdatacite:10.48550/arxiv.1202.3802 2023-05-15T18:16:36+02:00 Sea Ice Brightness Temperature as a Function of Ice Thickness: Computed curves for AMSR-E and SMOS (frequencies from 1.4 to 89 GHz) Mills, Peter Heygster, Georg 2012 https://dx.doi.org/10.48550/arxiv.1202.3802 https://arxiv.org/abs/1202.3802 unknown arXiv Creative Commons Attribution Non Commercial Share Alike 3.0 Unported https://creativecommons.org/licenses/by-nc-sa/3.0/legalcode cc-by-nc-sa-3.0 CC-BY-NC-SA Atmospheric and Oceanic Physics physics.ao-ph FOS Physical sciences Preprint Article article CreativeWork 2012 ftdatacite https://doi.org/10.48550/arxiv.1202.3802 2022-04-01T13:54:13Z The relationship between sea ice thickness and microwave brightness temperature is explored. Parameterized ice profiles are fed to a radiative-transfer-based sea ice emissivity model (Microwave Emmission of Layered Snowpack, MEMLS). Complex permittivities, required as input for the simulation, are determined using a semi-empirical mixture model. Since the thickness-radiance relation is not fixed but can vary significantly depending upon past and current weather conditions, we determine a range of brightness temperature values for each thickness. This is done using a bootstrap model in which the salinities are varied based on variances supplied with the thickness-salinity curve and the complex permittivities are varied based on variance supplied by the mixture model. The results suggest that scattering is one of the most important parameters determining sea ice brightness temperature, especially for new and forming ice. Further work must be done to accurately model both scattering and complex permittivities in sea ice. Report Sea ice DataCite Metadata Store (German National Library of Science and Technology)
institution Open Polar
collection DataCite Metadata Store (German National Library of Science and Technology)
op_collection_id ftdatacite
language unknown
topic Atmospheric and Oceanic Physics physics.ao-ph
FOS Physical sciences
spellingShingle Atmospheric and Oceanic Physics physics.ao-ph
FOS Physical sciences
Mills, Peter
Heygster, Georg
Sea Ice Brightness Temperature as a Function of Ice Thickness: Computed curves for AMSR-E and SMOS (frequencies from 1.4 to 89 GHz)
topic_facet Atmospheric and Oceanic Physics physics.ao-ph
FOS Physical sciences
description The relationship between sea ice thickness and microwave brightness temperature is explored. Parameterized ice profiles are fed to a radiative-transfer-based sea ice emissivity model (Microwave Emmission of Layered Snowpack, MEMLS). Complex permittivities, required as input for the simulation, are determined using a semi-empirical mixture model. Since the thickness-radiance relation is not fixed but can vary significantly depending upon past and current weather conditions, we determine a range of brightness temperature values for each thickness. This is done using a bootstrap model in which the salinities are varied based on variances supplied with the thickness-salinity curve and the complex permittivities are varied based on variance supplied by the mixture model. The results suggest that scattering is one of the most important parameters determining sea ice brightness temperature, especially for new and forming ice. Further work must be done to accurately model both scattering and complex permittivities in sea ice.
format Report
author Mills, Peter
Heygster, Georg
author_facet Mills, Peter
Heygster, Georg
author_sort Mills, Peter
title Sea Ice Brightness Temperature as a Function of Ice Thickness: Computed curves for AMSR-E and SMOS (frequencies from 1.4 to 89 GHz)
title_short Sea Ice Brightness Temperature as a Function of Ice Thickness: Computed curves for AMSR-E and SMOS (frequencies from 1.4 to 89 GHz)
title_full Sea Ice Brightness Temperature as a Function of Ice Thickness: Computed curves for AMSR-E and SMOS (frequencies from 1.4 to 89 GHz)
title_fullStr Sea Ice Brightness Temperature as a Function of Ice Thickness: Computed curves for AMSR-E and SMOS (frequencies from 1.4 to 89 GHz)
title_full_unstemmed Sea Ice Brightness Temperature as a Function of Ice Thickness: Computed curves for AMSR-E and SMOS (frequencies from 1.4 to 89 GHz)
title_sort sea ice brightness temperature as a function of ice thickness: computed curves for amsr-e and smos (frequencies from 1.4 to 89 ghz)
publisher arXiv
publishDate 2012
url https://dx.doi.org/10.48550/arxiv.1202.3802
https://arxiv.org/abs/1202.3802
genre Sea ice
genre_facet Sea ice
op_rights Creative Commons Attribution Non Commercial Share Alike 3.0 Unported
https://creativecommons.org/licenses/by-nc-sa/3.0/legalcode
cc-by-nc-sa-3.0
op_rightsnorm CC-BY-NC-SA
op_doi https://doi.org/10.48550/arxiv.1202.3802
_version_ 1766190332900278272

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