Influence of ice thickness on SMOS and Aquarius brightness temperature over Antarctica
The Dome-C region, in the East Antarctic Plateau, has been used for calibration/validation of satellite microwave radiometers since the 1970's. However, its use as an independent external target has been recently questioned due to some spatial inhomogeneities found in L-band airborne and satell...
Published in: | 2015 IEEE International Geoscience and Remote Sensing Symposium (IGARSS) |
---|---|
Main Authors: | , , , , |
Other Authors: | , , |
Format: | Other/Unknown Material |
Language: | English |
Published: |
Institute of Electrical and Electronics Engineers (IEEE)
2015
|
Subjects: | |
Online Access: | http://hdl.handle.net/2117/82686 https://doi.org/10.1109/IGARSS.2015.7327000 |
id |
ftupcatalunya:oai:upcommons.upc.edu:2117/82686 |
---|---|
record_format |
openpolar |
spelling |
ftupcatalunya:oai:upcommons.upc.edu:2117/82686 2023-05-15T13:58:47+02:00 Influence of ice thickness on SMOS and Aquarius brightness temperature over Antarctica Pablos Hernández, Miriam Piles Guillem, Maria Gonzalez Gambau, Verónica Camps Carmona, Adriano José Vall-Llossera Ferran, Mercedes Magdalena Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions Universitat Politècnica de Catalunya. CTE-CRAE - Grup de Recerca en Ciències i Tecnologies de l'Espai Universitat Politècnica de Catalunya. RSLAB - Grup de Recerca en Teledetecció 2015 4 p. http://hdl.handle.net/2117/82686 https://doi.org/10.1109/IGARSS.2015.7327000 eng eng Institute of Electrical and Electronics Engineers (IEEE) http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=7327000 Restricted access - publisher's policy Àrees temàtiques de la UPC::Enginyeria civil::Geologia::Oceanografia Radiometers Ocean temperature Ice thickness Subglacial lakes Subglacial bedrock Antarctica Brightness temperature L-band radiometer SMOS Aquarius Radiòmetres Oceanografia Conference report 2015 ftupcatalunya https://doi.org/10.1109/IGARSS.2015.7327000 2019-09-29T09:09:52Z The Dome-C region, in the East Antarctic Plateau, has been used for calibration/validation of satellite microwave radiometers since the 1970's. However, its use as an independent external target has been recently questioned due to some spatial inhomogeneities found in L-band airborne and satellite observations. This work evidences the influence of the Antarctic ice thickness spatial variations on the measured SMOS and Aquarius brightness temperatures (TB). The possible effects of subglacial water and bedrock on the acquired radiometric signals have also been analyzed. A 3-months no-daylight period during the Austral winter has been selected. Four transects over East Antarctica have been defined to study the spatial variations. A good agreement between SMOS and Aquarius TB changes and ice thickness variations over the whole Antarctica has been observed, obtaining linear correlations of 0.6-0.7 and slopes of 8.6-9.5 K/km. The subglacial lakes may affect the vertical physical temperature profile and/or the dielectric properties of the ice layers above. As expected, the subglacial bedrock is not contributing to the measured TB, since the maximum estimated L-band penetration depth is ~1-1.5 km. Peer Reviewed Postprint (published version) Other/Unknown Material Antarc* Antarctic Antarctica East Antarctica Universitat Politècnica de Catalunya (UPC): Theses and Dissertations Online (TDX) Antarctic Austral East Antarctica The Antarctic 2015 IEEE International Geoscience and Remote Sensing Symposium (IGARSS) 5178 5181 |
institution |
Open Polar |
collection |
Universitat Politècnica de Catalunya (UPC): Theses and Dissertations Online (TDX) |
op_collection_id |
ftupcatalunya |
language |
English |
topic |
Àrees temàtiques de la UPC::Enginyeria civil::Geologia::Oceanografia Radiometers Ocean temperature Ice thickness Subglacial lakes Subglacial bedrock Antarctica Brightness temperature L-band radiometer SMOS Aquarius Radiòmetres Oceanografia |
spellingShingle |
Àrees temàtiques de la UPC::Enginyeria civil::Geologia::Oceanografia Radiometers Ocean temperature Ice thickness Subglacial lakes Subglacial bedrock Antarctica Brightness temperature L-band radiometer SMOS Aquarius Radiòmetres Oceanografia Pablos Hernández, Miriam Piles Guillem, Maria Gonzalez Gambau, Verónica Camps Carmona, Adriano José Vall-Llossera Ferran, Mercedes Magdalena Influence of ice thickness on SMOS and Aquarius brightness temperature over Antarctica |
topic_facet |
Àrees temàtiques de la UPC::Enginyeria civil::Geologia::Oceanografia Radiometers Ocean temperature Ice thickness Subglacial lakes Subglacial bedrock Antarctica Brightness temperature L-band radiometer SMOS Aquarius Radiòmetres Oceanografia |
description |
The Dome-C region, in the East Antarctic Plateau, has been used for calibration/validation of satellite microwave radiometers since the 1970's. However, its use as an independent external target has been recently questioned due to some spatial inhomogeneities found in L-band airborne and satellite observations. This work evidences the influence of the Antarctic ice thickness spatial variations on the measured SMOS and Aquarius brightness temperatures (TB). The possible effects of subglacial water and bedrock on the acquired radiometric signals have also been analyzed. A 3-months no-daylight period during the Austral winter has been selected. Four transects over East Antarctica have been defined to study the spatial variations. A good agreement between SMOS and Aquarius TB changes and ice thickness variations over the whole Antarctica has been observed, obtaining linear correlations of 0.6-0.7 and slopes of 8.6-9.5 K/km. The subglacial lakes may affect the vertical physical temperature profile and/or the dielectric properties of the ice layers above. As expected, the subglacial bedrock is not contributing to the measured TB, since the maximum estimated L-band penetration depth is ~1-1.5 km. Peer Reviewed Postprint (published version) |
author2 |
Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions Universitat Politècnica de Catalunya. CTE-CRAE - Grup de Recerca en Ciències i Tecnologies de l'Espai Universitat Politècnica de Catalunya. RSLAB - Grup de Recerca en Teledetecció |
format |
Other/Unknown Material |
author |
Pablos Hernández, Miriam Piles Guillem, Maria Gonzalez Gambau, Verónica Camps Carmona, Adriano José Vall-Llossera Ferran, Mercedes Magdalena |
author_facet |
Pablos Hernández, Miriam Piles Guillem, Maria Gonzalez Gambau, Verónica Camps Carmona, Adriano José Vall-Llossera Ferran, Mercedes Magdalena |
author_sort |
Pablos Hernández, Miriam |
title |
Influence of ice thickness on SMOS and Aquarius brightness temperature over Antarctica |
title_short |
Influence of ice thickness on SMOS and Aquarius brightness temperature over Antarctica |
title_full |
Influence of ice thickness on SMOS and Aquarius brightness temperature over Antarctica |
title_fullStr |
Influence of ice thickness on SMOS and Aquarius brightness temperature over Antarctica |
title_full_unstemmed |
Influence of ice thickness on SMOS and Aquarius brightness temperature over Antarctica |
title_sort |
influence of ice thickness on smos and aquarius brightness temperature over antarctica |
publisher |
Institute of Electrical and Electronics Engineers (IEEE) |
publishDate |
2015 |
url |
http://hdl.handle.net/2117/82686 https://doi.org/10.1109/IGARSS.2015.7327000 |
geographic |
Antarctic Austral East Antarctica The Antarctic |
geographic_facet |
Antarctic Austral East Antarctica The Antarctic |
genre |
Antarc* Antarctic Antarctica East Antarctica |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica |
op_relation |
http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=7327000 |
op_rights |
Restricted access - publisher's policy |
op_doi |
https://doi.org/10.1109/IGARSS.2015.7327000 |
container_title |
2015 IEEE International Geoscience and Remote Sensing Symposium (IGARSS) |
container_start_page |
5178 |
op_container_end_page |
5181 |
_version_ |
1766267151590621184 |