Modelling the L-Band Snow-Covered Surface Emission in a Winter Canadian Prairie Environment
Detailed angular ground-based L-band brightness temperature (TB) measurements over snow covered frozen soil in a prairie environment were used to parameterize and evaluate an electromagnetic model, the Wave Approach for LOw-frequency MIcrowave emission in Snow (WALOMIS), for seasonal snow. WALOMIS,...
Published in: | Remote Sensing |
---|---|
Main Authors: | , , , , , , , , , |
Format: | Text |
Language: | English |
Published: |
Multidisciplinary Digital Publishing Institute
2018
|
Subjects: | |
Online Access: | https://doi.org/10.3390/rs10091451 |
id |
ftmdpi:oai:mdpi.com:/2072-4292/10/9/1451/ |
---|---|
record_format |
openpolar |
spelling |
ftmdpi:oai:mdpi.com:/2072-4292/10/9/1451/ 2023-08-20T04:00:46+02:00 Modelling the L-Band Snow-Covered Surface Emission in a Winter Canadian Prairie Environment Alexandre Roy Marion Leduc-Leballeur Ghislain Picard Alain Royer Peter Toose Chris Derksen Juha Lemmetyinen Aaron Berg Tracy Rowlandson Mike Schwank agris 2018-09-11 application/pdf https://doi.org/10.3390/rs10091451 EN eng Multidisciplinary Digital Publishing Institute https://dx.doi.org/10.3390/rs10091451 https://creativecommons.org/licenses/by/4.0/ Remote Sensing; Volume 10; Issue 9; Pages: 1451 L-band emission snow WALOMIS Frozen soil ground-based radiometer Text 2018 ftmdpi https://doi.org/10.3390/rs10091451 2023-07-31T21:43:23Z Detailed angular ground-based L-band brightness temperature (TB) measurements over snow covered frozen soil in a prairie environment were used to parameterize and evaluate an electromagnetic model, the Wave Approach for LOw-frequency MIcrowave emission in Snow (WALOMIS), for seasonal snow. WALOMIS, initially developed for Antarctic applications, was extended with a soil interface model. A Gaussian noise on snow layer thickness was implemented to account for natural variability and thus improve the TB simulations compared to observations. The model performance was compared with two radiative transfer models, the Dense Media Radiative Transfer-Multi Layer incoherent model (DMRT-ML) and a version of the Microwave Emission Model for Layered Snowpacks (MEMLS) adapted specifically for use at L-band in the original one-layer configuration (LS-MEMLS-1L). Angular radiometer measurements (30°, 40°, 50°, and 60°) were acquired at six snow pits. The root-mean-square error (RMSE) between simulated and measured TB at vertical and horizontal polarizations were similar for the three models, with overall RMSE between 7.2 and 10.5 K. However, WALOMIS and DMRT-ML were able to better reproduce the observed TB at higher incidence angles (50° and 60°) and at horizontal polarization. The similar results obtained between WALOMIS and DMRT-ML suggests that the interference phenomena are weak in the case of shallow seasonal snow despite the presence of visible layers with thicknesses smaller than the wavelength, and the radiative transfer model can thus be used to compute L-band brightness temperature. Text Antarc* Antarctic MDPI Open Access Publishing Antarctic Remote Sensing 10 9 1451 |
institution |
Open Polar |
collection |
MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
L-band emission snow WALOMIS Frozen soil ground-based radiometer |
spellingShingle |
L-band emission snow WALOMIS Frozen soil ground-based radiometer Alexandre Roy Marion Leduc-Leballeur Ghislain Picard Alain Royer Peter Toose Chris Derksen Juha Lemmetyinen Aaron Berg Tracy Rowlandson Mike Schwank Modelling the L-Band Snow-Covered Surface Emission in a Winter Canadian Prairie Environment |
topic_facet |
L-band emission snow WALOMIS Frozen soil ground-based radiometer |
description |
Detailed angular ground-based L-band brightness temperature (TB) measurements over snow covered frozen soil in a prairie environment were used to parameterize and evaluate an electromagnetic model, the Wave Approach for LOw-frequency MIcrowave emission in Snow (WALOMIS), for seasonal snow. WALOMIS, initially developed for Antarctic applications, was extended with a soil interface model. A Gaussian noise on snow layer thickness was implemented to account for natural variability and thus improve the TB simulations compared to observations. The model performance was compared with two radiative transfer models, the Dense Media Radiative Transfer-Multi Layer incoherent model (DMRT-ML) and a version of the Microwave Emission Model for Layered Snowpacks (MEMLS) adapted specifically for use at L-band in the original one-layer configuration (LS-MEMLS-1L). Angular radiometer measurements (30°, 40°, 50°, and 60°) were acquired at six snow pits. The root-mean-square error (RMSE) between simulated and measured TB at vertical and horizontal polarizations were similar for the three models, with overall RMSE between 7.2 and 10.5 K. However, WALOMIS and DMRT-ML were able to better reproduce the observed TB at higher incidence angles (50° and 60°) and at horizontal polarization. The similar results obtained between WALOMIS and DMRT-ML suggests that the interference phenomena are weak in the case of shallow seasonal snow despite the presence of visible layers with thicknesses smaller than the wavelength, and the radiative transfer model can thus be used to compute L-band brightness temperature. |
format |
Text |
author |
Alexandre Roy Marion Leduc-Leballeur Ghislain Picard Alain Royer Peter Toose Chris Derksen Juha Lemmetyinen Aaron Berg Tracy Rowlandson Mike Schwank |
author_facet |
Alexandre Roy Marion Leduc-Leballeur Ghislain Picard Alain Royer Peter Toose Chris Derksen Juha Lemmetyinen Aaron Berg Tracy Rowlandson Mike Schwank |
author_sort |
Alexandre Roy |
title |
Modelling the L-Band Snow-Covered Surface Emission in a Winter Canadian Prairie Environment |
title_short |
Modelling the L-Band Snow-Covered Surface Emission in a Winter Canadian Prairie Environment |
title_full |
Modelling the L-Band Snow-Covered Surface Emission in a Winter Canadian Prairie Environment |
title_fullStr |
Modelling the L-Band Snow-Covered Surface Emission in a Winter Canadian Prairie Environment |
title_full_unstemmed |
Modelling the L-Band Snow-Covered Surface Emission in a Winter Canadian Prairie Environment |
title_sort |
modelling the l-band snow-covered surface emission in a winter canadian prairie environment |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2018 |
url |
https://doi.org/10.3390/rs10091451 |
op_coverage |
agris |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Remote Sensing; Volume 10; Issue 9; Pages: 1451 |
op_relation |
https://dx.doi.org/10.3390/rs10091451 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/rs10091451 |
container_title |
Remote Sensing |
container_volume |
10 |
container_issue |
9 |
container_start_page |
1451 |
_version_ |
1774720211587432448 |