Employing relaxed smoothness constraints on imaginary part of refractive index in AERONET aerosol retrieval algorithm ...
In the Aerosol Robotic Network (AERONET) aerosol retrieval algorithm, smoothness constraints on the imaginary part of the refractive index (IPRI) provide control of retrieved spectral dependence of aerosol absorption by preventing the inversion code from fitting the noise in optical measurements and...
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ftdatacite:10.13016/m2rbk0-wzfq 2023-08-27T04:03:32+02:00 Employing relaxed smoothness constraints on imaginary part of refractive index in AERONET aerosol retrieval algorithm ... Sinyuk, Alexander Holben, Bent Eck, Thomas Giles, David Slutsker, Ilya Dubovik, Oleg Schafer, Joel Smirnov, Alexander Sorokin, Mikhail 2022 https://dx.doi.org/10.13016/m2rbk0-wzfq https://mdsoar.org/handle/11603/24542 en eng EGU Public Domain Mark 1.0 This work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law. http://creativecommons.org/publicdomain/mark/1.0/ CreativeWork article 2022 ftdatacite https://doi.org/10.13016/m2rbk0-wzfq 2023-08-07T14:24:23Z In the Aerosol Robotic Network (AERONET) aerosol retrieval algorithm, smoothness constraints on the imaginary part of the refractive index (IPRI) provide control of retrieved spectral dependence of aerosol absorption by preventing the inversion code from fitting the noise in optical measurements and thus avoiding unrealistic oscillations of retrievals with wavelength. The history of implementation of the IPRI smoothness constraints in the AERONET aerosol retrieval algorithm is discussed. It is shown that the latest version of the IPRI smoothness constraints, termed standard (STD) and employed by Version 3 (V3) of aerosol retrieval algorithm, should be modified to account for strong variability of light absorption by brown carbon (BrC) containing aerosols in UV through mid-visible parts of the solar spectrum. In V3 strong spectral constraints were imposed at high values of the Angstrom Exponent (AE; 440–870 nm) since black carbon (BC) was assumed to be the primary absorber, while the constraints became ... Article in Journal/Newspaper Aerosol Robotic Network 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 |
English |
description |
In the Aerosol Robotic Network (AERONET) aerosol retrieval algorithm, smoothness constraints on the imaginary part of the refractive index (IPRI) provide control of retrieved spectral dependence of aerosol absorption by preventing the inversion code from fitting the noise in optical measurements and thus avoiding unrealistic oscillations of retrievals with wavelength. The history of implementation of the IPRI smoothness constraints in the AERONET aerosol retrieval algorithm is discussed. It is shown that the latest version of the IPRI smoothness constraints, termed standard (STD) and employed by Version 3 (V3) of aerosol retrieval algorithm, should be modified to account for strong variability of light absorption by brown carbon (BrC) containing aerosols in UV through mid-visible parts of the solar spectrum. In V3 strong spectral constraints were imposed at high values of the Angstrom Exponent (AE; 440–870 nm) since black carbon (BC) was assumed to be the primary absorber, while the constraints became ... |
format |
Article in Journal/Newspaper |
author |
Sinyuk, Alexander Holben, Bent Eck, Thomas Giles, David Slutsker, Ilya Dubovik, Oleg Schafer, Joel Smirnov, Alexander Sorokin, Mikhail |
spellingShingle |
Sinyuk, Alexander Holben, Bent Eck, Thomas Giles, David Slutsker, Ilya Dubovik, Oleg Schafer, Joel Smirnov, Alexander Sorokin, Mikhail Employing relaxed smoothness constraints on imaginary part of refractive index in AERONET aerosol retrieval algorithm ... |
author_facet |
Sinyuk, Alexander Holben, Bent Eck, Thomas Giles, David Slutsker, Ilya Dubovik, Oleg Schafer, Joel Smirnov, Alexander Sorokin, Mikhail |
author_sort |
Sinyuk, Alexander |
title |
Employing relaxed smoothness constraints on imaginary part of refractive index in AERONET aerosol retrieval algorithm ... |
title_short |
Employing relaxed smoothness constraints on imaginary part of refractive index in AERONET aerosol retrieval algorithm ... |
title_full |
Employing relaxed smoothness constraints on imaginary part of refractive index in AERONET aerosol retrieval algorithm ... |
title_fullStr |
Employing relaxed smoothness constraints on imaginary part of refractive index in AERONET aerosol retrieval algorithm ... |
title_full_unstemmed |
Employing relaxed smoothness constraints on imaginary part of refractive index in AERONET aerosol retrieval algorithm ... |
title_sort |
employing relaxed smoothness constraints on imaginary part of refractive index in aeronet aerosol retrieval algorithm ... |
publisher |
EGU |
publishDate |
2022 |
url |
https://dx.doi.org/10.13016/m2rbk0-wzfq https://mdsoar.org/handle/11603/24542 |
genre |
Aerosol Robotic Network |
genre_facet |
Aerosol Robotic Network |
op_rights |
Public Domain Mark 1.0 This work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law. http://creativecommons.org/publicdomain/mark/1.0/ |
op_doi |
https://doi.org/10.13016/m2rbk0-wzfq |
_version_ |
1775350779410907136 |