Evaluation of modeled microwave land surface emissivities with satellite‐based estimates
An accurate estimate of the microwave surface emissivity is necessary for the retrieval of atmospheric quantities from microwave imagers or sounders. The objective of this study is to evaluate the microwave land surface emissivity modeling of the Community Radiative Transfer Model (CRTM), providing...
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| Autor*in: |
Prigent, C [verfasserIn] |
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| Format: |
Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2015 |
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| Rechteinformationen: |
Nutzungsrecht: © 2015. American Geophysical Union. All Rights Reserved. |
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| Übergeordnetes Werk: |
Enthalten in: Journal of geophysical research / D - Washington, DC : Union, 1984, 120(2015), 7, Seite 2706-2718 |
|---|---|
| Übergeordnetes Werk: |
volume:120 ; year:2015 ; number:7 ; pages:2706-2718 |
| Links: |
|---|
| DOI / URN: |
10.1002/2014JD021817 |
|---|
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| 520 | |a An accurate estimate of the microwave surface emissivity is necessary for the retrieval of atmospheric quantities from microwave imagers or sounders. The objective of this study is to evaluate the microwave land surface emissivity modeling of the Community Radiative Transfer Model (CRTM), providing quantitative statistic information for further model improvements. First, the model‐simulated emissivity is compared to emissivity estimates derived from satellite observations (TELSEM, Tool to Estimate Land Surface Emissivities at Microwaves). The model simulations agree reasonably well with TELSEM over snow‐free vegetated areas, especially at vertical polarization up to 40 GHz. For snow‐free surfaces, the mean difference between CRTM and TELSEM emissivities at vertical polarization is lower than 0.01 below 40 GHz and increases to 0.02 at 89 GHz. At horizontal polarization, it increases with frequency, from 0.01 at 10.6 GHz to 0.04 at 89 GHz. Over deserts and snow, larger differences are observed, which can be due to the lack of quality inputs to the model in these complex environments. A further evaluation is provided by comparing brightness temperature (Tbs) simulations with AMSR‐E observations, where CRTM emissivity and TELSEM emissivity are coupled into a comprehensive radiative transfer model to simulate the brightness temperatures, respectively. The comparison shows smaller RMS errors with the satellite‐derived estimates than with the model, despite some significant bias at midday with the satellite‐derived emissivities at high frequencies. This study confirms and extends to the global scale previous evaluations of land surface microwave emissivity model. It emphasizes the needs for better physical modeling in arid regions and over snow‐covered surfaces. Modeled land surface microwave emissivity compared to satellite‐based estimate Over snow‐free vegetated areas, the emissivities agree reasonably well Further evaluation is provided by direct comparison with satellite observations | ||
| 540 | |a Nutzungsrecht: © 2015. American Geophysical Union. All Rights Reserved. | ||
| 650 | 4 | |a microwave emissivity | |
| 650 | 4 | |a Meteorology | |
| 650 | 4 | |a Microwaves | |
| 650 | 4 | |a Meteorological satellites | |
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| 700 | 1 | |a Liang, P |4 oth | |
| 700 | 1 | |a Tian, Y |4 oth | |
| 700 | 1 | |a Aires, F |4 oth | |
| 700 | 1 | |a Moncet, J.‐L |4 oth | |
| 700 | 1 | |a Boukabara, S. A |4 oth | |
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10.1002/2014JD021817 doi PQ20160617 (DE-627)OLC1957056789 (DE-599)GBVOLC1957056789 (PRQ)c2503-2813ea6a7ee3180ecf23f5792fbb9345dd53ace199d3cd12f34b79908785b95a0 (KEY)0137985220150000120000702706evaluationofmodeledmicrowavelandsurfaceemissivitie DE-627 ger DE-627 rakwb eng 550 DNB Prigent, C verfasserin aut Evaluation of modeled microwave land surface emissivities with satellite‐based estimates 2015 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier An accurate estimate of the microwave surface emissivity is necessary for the retrieval of atmospheric quantities from microwave imagers or sounders. The objective of this study is to evaluate the microwave land surface emissivity modeling of the Community Radiative Transfer Model (CRTM), providing quantitative statistic information for further model improvements. First, the model‐simulated emissivity is compared to emissivity estimates derived from satellite observations (TELSEM, Tool to Estimate Land Surface Emissivities at Microwaves). The model simulations agree reasonably well with TELSEM over snow‐free vegetated areas, especially at vertical polarization up to 40 GHz. For snow‐free surfaces, the mean difference between CRTM and TELSEM emissivities at vertical polarization is lower than 0.01 below 40 GHz and increases to 0.02 at 89 GHz. At horizontal polarization, it increases with frequency, from 0.01 at 10.6 GHz to 0.04 at 89 GHz. Over deserts and snow, larger differences are observed, which can be due to the lack of quality inputs to the model in these complex environments. A further evaluation is provided by comparing brightness temperature (Tbs) simulations with AMSR‐E observations, where CRTM emissivity and TELSEM emissivity are coupled into a comprehensive radiative transfer model to simulate the brightness temperatures, respectively. The comparison shows smaller RMS errors with the satellite‐derived estimates than with the model, despite some significant bias at midday with the satellite‐derived emissivities at high frequencies. This study confirms and extends to the global scale previous evaluations of land surface microwave emissivity model. It emphasizes the needs for better physical modeling in arid regions and over snow‐covered surfaces. Modeled land surface microwave emissivity compared to satellite‐based estimate Over snow‐free vegetated areas, the emissivities agree reasonably well Further evaluation is provided by direct comparison with satellite observations Nutzungsrecht: © 2015. American Geophysical Union. All Rights Reserved. microwave emissivity Meteorology Microwaves Meteorological satellites Models Liang, P oth Tian, Y oth Aires, F oth Moncet, J.‐L oth Boukabara, S. A oth Enthalten in Journal of geophysical research / D Washington, DC : Union, 1984 120(2015), 7, Seite 2706-2718 (DE-627)130444391 (DE-600)710256-2 (DE-576)015978818 2169-897X nnns volume:120 year:2015 number:7 pages:2706-2718 http://dx.doi.org/10.1002/2014JD021817 Volltext http://onlinelibrary.wiley.com/doi/10.1002/2014JD021817/abstract http://search.proquest.com/docview/1675017018 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY SSG-OLC-GEO SSG-OPC-GGO SSG-OPC-GEO GBV_ILN_62 GBV_ILN_154 AR 120 2015 7 2706-2718 |
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10.1002/2014JD021817 doi PQ20160617 (DE-627)OLC1957056789 (DE-599)GBVOLC1957056789 (PRQ)c2503-2813ea6a7ee3180ecf23f5792fbb9345dd53ace199d3cd12f34b79908785b95a0 (KEY)0137985220150000120000702706evaluationofmodeledmicrowavelandsurfaceemissivitie DE-627 ger DE-627 rakwb eng 550 DNB Prigent, C verfasserin aut Evaluation of modeled microwave land surface emissivities with satellite‐based estimates 2015 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier An accurate estimate of the microwave surface emissivity is necessary for the retrieval of atmospheric quantities from microwave imagers or sounders. The objective of this study is to evaluate the microwave land surface emissivity modeling of the Community Radiative Transfer Model (CRTM), providing quantitative statistic information for further model improvements. First, the model‐simulated emissivity is compared to emissivity estimates derived from satellite observations (TELSEM, Tool to Estimate Land Surface Emissivities at Microwaves). The model simulations agree reasonably well with TELSEM over snow‐free vegetated areas, especially at vertical polarization up to 40 GHz. For snow‐free surfaces, the mean difference between CRTM and TELSEM emissivities at vertical polarization is lower than 0.01 below 40 GHz and increases to 0.02 at 89 GHz. At horizontal polarization, it increases with frequency, from 0.01 at 10.6 GHz to 0.04 at 89 GHz. Over deserts and snow, larger differences are observed, which can be due to the lack of quality inputs to the model in these complex environments. A further evaluation is provided by comparing brightness temperature (Tbs) simulations with AMSR‐E observations, where CRTM emissivity and TELSEM emissivity are coupled into a comprehensive radiative transfer model to simulate the brightness temperatures, respectively. The comparison shows smaller RMS errors with the satellite‐derived estimates than with the model, despite some significant bias at midday with the satellite‐derived emissivities at high frequencies. This study confirms and extends to the global scale previous evaluations of land surface microwave emissivity model. It emphasizes the needs for better physical modeling in arid regions and over snow‐covered surfaces. Modeled land surface microwave emissivity compared to satellite‐based estimate Over snow‐free vegetated areas, the emissivities agree reasonably well Further evaluation is provided by direct comparison with satellite observations Nutzungsrecht: © 2015. American Geophysical Union. All Rights Reserved. microwave emissivity Meteorology Microwaves Meteorological satellites Models Liang, P oth Tian, Y oth Aires, F oth Moncet, J.‐L oth Boukabara, S. A oth Enthalten in Journal of geophysical research / D Washington, DC : Union, 1984 120(2015), 7, Seite 2706-2718 (DE-627)130444391 (DE-600)710256-2 (DE-576)015978818 2169-897X nnns volume:120 year:2015 number:7 pages:2706-2718 http://dx.doi.org/10.1002/2014JD021817 Volltext http://onlinelibrary.wiley.com/doi/10.1002/2014JD021817/abstract http://search.proquest.com/docview/1675017018 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY SSG-OLC-GEO SSG-OPC-GGO SSG-OPC-GEO GBV_ILN_62 GBV_ILN_154 AR 120 2015 7 2706-2718 |
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10.1002/2014JD021817 doi PQ20160617 (DE-627)OLC1957056789 (DE-599)GBVOLC1957056789 (PRQ)c2503-2813ea6a7ee3180ecf23f5792fbb9345dd53ace199d3cd12f34b79908785b95a0 (KEY)0137985220150000120000702706evaluationofmodeledmicrowavelandsurfaceemissivitie DE-627 ger DE-627 rakwb eng 550 DNB Prigent, C verfasserin aut Evaluation of modeled microwave land surface emissivities with satellite‐based estimates 2015 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier An accurate estimate of the microwave surface emissivity is necessary for the retrieval of atmospheric quantities from microwave imagers or sounders. The objective of this study is to evaluate the microwave land surface emissivity modeling of the Community Radiative Transfer Model (CRTM), providing quantitative statistic information for further model improvements. First, the model‐simulated emissivity is compared to emissivity estimates derived from satellite observations (TELSEM, Tool to Estimate Land Surface Emissivities at Microwaves). The model simulations agree reasonably well with TELSEM over snow‐free vegetated areas, especially at vertical polarization up to 40 GHz. For snow‐free surfaces, the mean difference between CRTM and TELSEM emissivities at vertical polarization is lower than 0.01 below 40 GHz and increases to 0.02 at 89 GHz. At horizontal polarization, it increases with frequency, from 0.01 at 10.6 GHz to 0.04 at 89 GHz. Over deserts and snow, larger differences are observed, which can be due to the lack of quality inputs to the model in these complex environments. A further evaluation is provided by comparing brightness temperature (Tbs) simulations with AMSR‐E observations, where CRTM emissivity and TELSEM emissivity are coupled into a comprehensive radiative transfer model to simulate the brightness temperatures, respectively. The comparison shows smaller RMS errors with the satellite‐derived estimates than with the model, despite some significant bias at midday with the satellite‐derived emissivities at high frequencies. This study confirms and extends to the global scale previous evaluations of land surface microwave emissivity model. It emphasizes the needs for better physical modeling in arid regions and over snow‐covered surfaces. Modeled land surface microwave emissivity compared to satellite‐based estimate Over snow‐free vegetated areas, the emissivities agree reasonably well Further evaluation is provided by direct comparison with satellite observations Nutzungsrecht: © 2015. American Geophysical Union. All Rights Reserved. microwave emissivity Meteorology Microwaves Meteorological satellites Models Liang, P oth Tian, Y oth Aires, F oth Moncet, J.‐L oth Boukabara, S. A oth Enthalten in Journal of geophysical research / D Washington, DC : Union, 1984 120(2015), 7, Seite 2706-2718 (DE-627)130444391 (DE-600)710256-2 (DE-576)015978818 2169-897X nnns volume:120 year:2015 number:7 pages:2706-2718 http://dx.doi.org/10.1002/2014JD021817 Volltext http://onlinelibrary.wiley.com/doi/10.1002/2014JD021817/abstract http://search.proquest.com/docview/1675017018 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY SSG-OLC-GEO SSG-OPC-GGO SSG-OPC-GEO GBV_ILN_62 GBV_ILN_154 AR 120 2015 7 2706-2718 |
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10.1002/2014JD021817 doi PQ20160617 (DE-627)OLC1957056789 (DE-599)GBVOLC1957056789 (PRQ)c2503-2813ea6a7ee3180ecf23f5792fbb9345dd53ace199d3cd12f34b79908785b95a0 (KEY)0137985220150000120000702706evaluationofmodeledmicrowavelandsurfaceemissivitie DE-627 ger DE-627 rakwb eng 550 DNB Prigent, C verfasserin aut Evaluation of modeled microwave land surface emissivities with satellite‐based estimates 2015 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier An accurate estimate of the microwave surface emissivity is necessary for the retrieval of atmospheric quantities from microwave imagers or sounders. The objective of this study is to evaluate the microwave land surface emissivity modeling of the Community Radiative Transfer Model (CRTM), providing quantitative statistic information for further model improvements. First, the model‐simulated emissivity is compared to emissivity estimates derived from satellite observations (TELSEM, Tool to Estimate Land Surface Emissivities at Microwaves). The model simulations agree reasonably well with TELSEM over snow‐free vegetated areas, especially at vertical polarization up to 40 GHz. For snow‐free surfaces, the mean difference between CRTM and TELSEM emissivities at vertical polarization is lower than 0.01 below 40 GHz and increases to 0.02 at 89 GHz. At horizontal polarization, it increases with frequency, from 0.01 at 10.6 GHz to 0.04 at 89 GHz. Over deserts and snow, larger differences are observed, which can be due to the lack of quality inputs to the model in these complex environments. A further evaluation is provided by comparing brightness temperature (Tbs) simulations with AMSR‐E observations, where CRTM emissivity and TELSEM emissivity are coupled into a comprehensive radiative transfer model to simulate the brightness temperatures, respectively. The comparison shows smaller RMS errors with the satellite‐derived estimates than with the model, despite some significant bias at midday with the satellite‐derived emissivities at high frequencies. This study confirms and extends to the global scale previous evaluations of land surface microwave emissivity model. It emphasizes the needs for better physical modeling in arid regions and over snow‐covered surfaces. Modeled land surface microwave emissivity compared to satellite‐based estimate Over snow‐free vegetated areas, the emissivities agree reasonably well Further evaluation is provided by direct comparison with satellite observations Nutzungsrecht: © 2015. American Geophysical Union. All Rights Reserved. microwave emissivity Meteorology Microwaves Meteorological satellites Models Liang, P oth Tian, Y oth Aires, F oth Moncet, J.‐L oth Boukabara, S. A oth Enthalten in Journal of geophysical research / D Washington, DC : Union, 1984 120(2015), 7, Seite 2706-2718 (DE-627)130444391 (DE-600)710256-2 (DE-576)015978818 2169-897X nnns volume:120 year:2015 number:7 pages:2706-2718 http://dx.doi.org/10.1002/2014JD021817 Volltext http://onlinelibrary.wiley.com/doi/10.1002/2014JD021817/abstract http://search.proquest.com/docview/1675017018 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY SSG-OLC-GEO SSG-OPC-GGO SSG-OPC-GEO GBV_ILN_62 GBV_ILN_154 AR 120 2015 7 2706-2718 |
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10.1002/2014JD021817 doi PQ20160617 (DE-627)OLC1957056789 (DE-599)GBVOLC1957056789 (PRQ)c2503-2813ea6a7ee3180ecf23f5792fbb9345dd53ace199d3cd12f34b79908785b95a0 (KEY)0137985220150000120000702706evaluationofmodeledmicrowavelandsurfaceemissivitie DE-627 ger DE-627 rakwb eng 550 DNB Prigent, C verfasserin aut Evaluation of modeled microwave land surface emissivities with satellite‐based estimates 2015 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier An accurate estimate of the microwave surface emissivity is necessary for the retrieval of atmospheric quantities from microwave imagers or sounders. The objective of this study is to evaluate the microwave land surface emissivity modeling of the Community Radiative Transfer Model (CRTM), providing quantitative statistic information for further model improvements. First, the model‐simulated emissivity is compared to emissivity estimates derived from satellite observations (TELSEM, Tool to Estimate Land Surface Emissivities at Microwaves). The model simulations agree reasonably well with TELSEM over snow‐free vegetated areas, especially at vertical polarization up to 40 GHz. For snow‐free surfaces, the mean difference between CRTM and TELSEM emissivities at vertical polarization is lower than 0.01 below 40 GHz and increases to 0.02 at 89 GHz. At horizontal polarization, it increases with frequency, from 0.01 at 10.6 GHz to 0.04 at 89 GHz. Over deserts and snow, larger differences are observed, which can be due to the lack of quality inputs to the model in these complex environments. A further evaluation is provided by comparing brightness temperature (Tbs) simulations with AMSR‐E observations, where CRTM emissivity and TELSEM emissivity are coupled into a comprehensive radiative transfer model to simulate the brightness temperatures, respectively. The comparison shows smaller RMS errors with the satellite‐derived estimates than with the model, despite some significant bias at midday with the satellite‐derived emissivities at high frequencies. This study confirms and extends to the global scale previous evaluations of land surface microwave emissivity model. It emphasizes the needs for better physical modeling in arid regions and over snow‐covered surfaces. Modeled land surface microwave emissivity compared to satellite‐based estimate Over snow‐free vegetated areas, the emissivities agree reasonably well Further evaluation is provided by direct comparison with satellite observations Nutzungsrecht: © 2015. American Geophysical Union. All Rights Reserved. microwave emissivity Meteorology Microwaves Meteorological satellites Models Liang, P oth Tian, Y oth Aires, F oth Moncet, J.‐L oth Boukabara, S. A oth Enthalten in Journal of geophysical research / D Washington, DC : Union, 1984 120(2015), 7, Seite 2706-2718 (DE-627)130444391 (DE-600)710256-2 (DE-576)015978818 2169-897X nnns volume:120 year:2015 number:7 pages:2706-2718 http://dx.doi.org/10.1002/2014JD021817 Volltext http://onlinelibrary.wiley.com/doi/10.1002/2014JD021817/abstract http://search.proquest.com/docview/1675017018 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY SSG-OLC-GEO SSG-OPC-GGO SSG-OPC-GEO GBV_ILN_62 GBV_ILN_154 AR 120 2015 7 2706-2718 |
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The objective of this study is to evaluate the microwave land surface emissivity modeling of the Community Radiative Transfer Model (CRTM), providing quantitative statistic information for further model improvements. First, the model‐simulated emissivity is compared to emissivity estimates derived from satellite observations (TELSEM, Tool to Estimate Land Surface Emissivities at Microwaves). The model simulations agree reasonably well with TELSEM over snow‐free vegetated areas, especially at vertical polarization up to 40 GHz. For snow‐free surfaces, the mean difference between CRTM and TELSEM emissivities at vertical polarization is lower than 0.01 below 40 GHz and increases to 0.02 at 89 GHz. At horizontal polarization, it increases with frequency, from 0.01 at 10.6 GHz to 0.04 at 89 GHz. Over deserts and snow, larger differences are observed, which can be due to the lack of quality inputs to the model in these complex environments. 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evaluation of modeled microwave land surface emissivities with satellite‐based estimates |
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Evaluation of modeled microwave land surface emissivities with satellite‐based estimates |
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An accurate estimate of the microwave surface emissivity is necessary for the retrieval of atmospheric quantities from microwave imagers or sounders. The objective of this study is to evaluate the microwave land surface emissivity modeling of the Community Radiative Transfer Model (CRTM), providing quantitative statistic information for further model improvements. First, the model‐simulated emissivity is compared to emissivity estimates derived from satellite observations (TELSEM, Tool to Estimate Land Surface Emissivities at Microwaves). The model simulations agree reasonably well with TELSEM over snow‐free vegetated areas, especially at vertical polarization up to 40 GHz. For snow‐free surfaces, the mean difference between CRTM and TELSEM emissivities at vertical polarization is lower than 0.01 below 40 GHz and increases to 0.02 at 89 GHz. At horizontal polarization, it increases with frequency, from 0.01 at 10.6 GHz to 0.04 at 89 GHz. Over deserts and snow, larger differences are observed, which can be due to the lack of quality inputs to the model in these complex environments. A further evaluation is provided by comparing brightness temperature (Tbs) simulations with AMSR‐E observations, where CRTM emissivity and TELSEM emissivity are coupled into a comprehensive radiative transfer model to simulate the brightness temperatures, respectively. The comparison shows smaller RMS errors with the satellite‐derived estimates than with the model, despite some significant bias at midday with the satellite‐derived emissivities at high frequencies. This study confirms and extends to the global scale previous evaluations of land surface microwave emissivity model. It emphasizes the needs for better physical modeling in arid regions and over snow‐covered surfaces. Modeled land surface microwave emissivity compared to satellite‐based estimate Over snow‐free vegetated areas, the emissivities agree reasonably well Further evaluation is provided by direct comparison with satellite observations |
| abstractGer |
An accurate estimate of the microwave surface emissivity is necessary for the retrieval of atmospheric quantities from microwave imagers or sounders. The objective of this study is to evaluate the microwave land surface emissivity modeling of the Community Radiative Transfer Model (CRTM), providing quantitative statistic information for further model improvements. First, the model‐simulated emissivity is compared to emissivity estimates derived from satellite observations (TELSEM, Tool to Estimate Land Surface Emissivities at Microwaves). The model simulations agree reasonably well with TELSEM over snow‐free vegetated areas, especially at vertical polarization up to 40 GHz. For snow‐free surfaces, the mean difference between CRTM and TELSEM emissivities at vertical polarization is lower than 0.01 below 40 GHz and increases to 0.02 at 89 GHz. At horizontal polarization, it increases with frequency, from 0.01 at 10.6 GHz to 0.04 at 89 GHz. Over deserts and snow, larger differences are observed, which can be due to the lack of quality inputs to the model in these complex environments. A further evaluation is provided by comparing brightness temperature (Tbs) simulations with AMSR‐E observations, where CRTM emissivity and TELSEM emissivity are coupled into a comprehensive radiative transfer model to simulate the brightness temperatures, respectively. The comparison shows smaller RMS errors with the satellite‐derived estimates than with the model, despite some significant bias at midday with the satellite‐derived emissivities at high frequencies. This study confirms and extends to the global scale previous evaluations of land surface microwave emissivity model. It emphasizes the needs for better physical modeling in arid regions and over snow‐covered surfaces. Modeled land surface microwave emissivity compared to satellite‐based estimate Over snow‐free vegetated areas, the emissivities agree reasonably well Further evaluation is provided by direct comparison with satellite observations |
| abstract_unstemmed |
An accurate estimate of the microwave surface emissivity is necessary for the retrieval of atmospheric quantities from microwave imagers or sounders. The objective of this study is to evaluate the microwave land surface emissivity modeling of the Community Radiative Transfer Model (CRTM), providing quantitative statistic information for further model improvements. First, the model‐simulated emissivity is compared to emissivity estimates derived from satellite observations (TELSEM, Tool to Estimate Land Surface Emissivities at Microwaves). The model simulations agree reasonably well with TELSEM over snow‐free vegetated areas, especially at vertical polarization up to 40 GHz. For snow‐free surfaces, the mean difference between CRTM and TELSEM emissivities at vertical polarization is lower than 0.01 below 40 GHz and increases to 0.02 at 89 GHz. At horizontal polarization, it increases with frequency, from 0.01 at 10.6 GHz to 0.04 at 89 GHz. Over deserts and snow, larger differences are observed, which can be due to the lack of quality inputs to the model in these complex environments. A further evaluation is provided by comparing brightness temperature (Tbs) simulations with AMSR‐E observations, where CRTM emissivity and TELSEM emissivity are coupled into a comprehensive radiative transfer model to simulate the brightness temperatures, respectively. The comparison shows smaller RMS errors with the satellite‐derived estimates than with the model, despite some significant bias at midday with the satellite‐derived emissivities at high frequencies. This study confirms and extends to the global scale previous evaluations of land surface microwave emissivity model. It emphasizes the needs for better physical modeling in arid regions and over snow‐covered surfaces. Modeled land surface microwave emissivity compared to satellite‐based estimate Over snow‐free vegetated areas, the emissivities agree reasonably well Further evaluation is provided by direct comparison with satellite observations |
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Evaluation of modeled microwave land surface emissivities with satellite‐based estimates |
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