Reducing Weather Influences on Sea Ice Concentration Retrieval using Spaceborne 89 GHz Passive Microwave Observations
The major challenge of deriving sea ice concentration from the high resolution 89 GHz passive microwave observation is the strong atmospheric attenuation caused by water vapor and liquid water path, and surface variability induced by wind and temperature. In this study, we improve an 89 GHz sea ice...
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Universität Bremen
2020
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ftsubbremen:oai:media.suub.uni-bremen.de:Publications/elib/4592 2023-05-15T14:58:35+02:00 Reducing Weather Influences on Sea Ice Concentration Retrieval using Spaceborne 89 GHz Passive Microwave Observations Lu, Junshen Spreen, Gunnar Haas, Christian 2020-07-13 application/pdf https://media.suub.uni-bremen.de/handle/elib/4592 https://doi.org/10.26092/elib/389 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib45922 eng eng Universität Bremen Fachbereich 01: Physik/Elektrotechnik (FB 01) https://media.suub.uni-bremen.de/handle/elib/4592 http://dx.doi.org/10.26092/elib/389 doi:10.26092/elib/389 urn:nbn:de:gbv:46-elib45922 info:eu-repo/semantics/openAccess Attribution-NonCommercial-NoDerivs 3.0 Germany http://creativecommons.org/licenses/by-nc-nd/3.0/de/ CC-BY-NC-ND sea ice concentration Arctic atmospheric correction microwave remote sensing radiative transfer model 530 530 Physics ddc:530 Dissertation doctoralThesis 2020 ftsubbremen https://doi.org/10.26092/elib/389 2022-11-09T07:10:13Z The major challenge of deriving sea ice concentration from the high resolution 89 GHz passive microwave observation is the strong atmospheric attenuation caused by water vapor and liquid water path, and surface variability induced by wind and temperature. In this study, we improve an 89 GHz sea ice concentration retrieval algorithm called the Arctic Radiation and Turbulence Interaction STudy (ARTIST) Sea Ice (ASI) algorithm, by correcting the observed brightness temperatures for these weather influences before they enter the algorithm. The instrument used is the Advanced Microwave Scanning Radiometer - Earth Observing System (EOS) (AMSR-E) on board NASA’s Aqua satellite. The weather correction is realized by simulating changes induced by weather influences in the top of atmosphere brightness temperatures through a radiative transfer model. Two correction schemes are tested, one utilizing the numerical weather prediction data as input, and the other the retrievals of an optimal estimation method. Two improved versions of the ASI algorithm, ASI2 and ASI3, are developed respectively based on the corrected brightness temperatures and new tie points. For both the influence of the atmosphere on the 89 GHz brightness temperature is successfully reduced. Main results are a better representation of low ice concentration in the marginal ice zone, and a reduction in RMS of 2.3% over high ice compared to Landsat data. Doctoral or Postdoctoral Thesis Arctic Sea ice Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen) Arctic |
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Open Polar |
collection |
Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen) |
op_collection_id |
ftsubbremen |
language |
English |
topic |
sea ice concentration Arctic atmospheric correction microwave remote sensing radiative transfer model 530 530 Physics ddc:530 |
spellingShingle |
sea ice concentration Arctic atmospheric correction microwave remote sensing radiative transfer model 530 530 Physics ddc:530 Lu, Junshen Reducing Weather Influences on Sea Ice Concentration Retrieval using Spaceborne 89 GHz Passive Microwave Observations |
topic_facet |
sea ice concentration Arctic atmospheric correction microwave remote sensing radiative transfer model 530 530 Physics ddc:530 |
description |
The major challenge of deriving sea ice concentration from the high resolution 89 GHz passive microwave observation is the strong atmospheric attenuation caused by water vapor and liquid water path, and surface variability induced by wind and temperature. In this study, we improve an 89 GHz sea ice concentration retrieval algorithm called the Arctic Radiation and Turbulence Interaction STudy (ARTIST) Sea Ice (ASI) algorithm, by correcting the observed brightness temperatures for these weather influences before they enter the algorithm. The instrument used is the Advanced Microwave Scanning Radiometer - Earth Observing System (EOS) (AMSR-E) on board NASA’s Aqua satellite. The weather correction is realized by simulating changes induced by weather influences in the top of atmosphere brightness temperatures through a radiative transfer model. Two correction schemes are tested, one utilizing the numerical weather prediction data as input, and the other the retrievals of an optimal estimation method. Two improved versions of the ASI algorithm, ASI2 and ASI3, are developed respectively based on the corrected brightness temperatures and new tie points. For both the influence of the atmosphere on the 89 GHz brightness temperature is successfully reduced. Main results are a better representation of low ice concentration in the marginal ice zone, and a reduction in RMS of 2.3% over high ice compared to Landsat data. |
author2 |
Spreen, Gunnar Haas, Christian |
format |
Doctoral or Postdoctoral Thesis |
author |
Lu, Junshen |
author_facet |
Lu, Junshen |
author_sort |
Lu, Junshen |
title |
Reducing Weather Influences on Sea Ice Concentration Retrieval using Spaceborne 89 GHz Passive Microwave Observations |
title_short |
Reducing Weather Influences on Sea Ice Concentration Retrieval using Spaceborne 89 GHz Passive Microwave Observations |
title_full |
Reducing Weather Influences on Sea Ice Concentration Retrieval using Spaceborne 89 GHz Passive Microwave Observations |
title_fullStr |
Reducing Weather Influences on Sea Ice Concentration Retrieval using Spaceborne 89 GHz Passive Microwave Observations |
title_full_unstemmed |
Reducing Weather Influences on Sea Ice Concentration Retrieval using Spaceborne 89 GHz Passive Microwave Observations |
title_sort |
reducing weather influences on sea ice concentration retrieval using spaceborne 89 ghz passive microwave observations |
publisher |
Universität Bremen |
publishDate |
2020 |
url |
https://media.suub.uni-bremen.de/handle/elib/4592 https://doi.org/10.26092/elib/389 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib45922 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Sea ice |
genre_facet |
Arctic Sea ice |
op_relation |
https://media.suub.uni-bremen.de/handle/elib/4592 http://dx.doi.org/10.26092/elib/389 doi:10.26092/elib/389 urn:nbn:de:gbv:46-elib45922 |
op_rights |
info:eu-repo/semantics/openAccess Attribution-NonCommercial-NoDerivs 3.0 Germany http://creativecommons.org/licenses/by-nc-nd/3.0/de/ |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.26092/elib/389 |
_version_ |
1766330715448803328 |