Determining the Aethalometer multiple scattering enhancement factor C from the filter loading parameter
Light-absorbing aerosols heat the atmosphere an accurate quantification of their absorption coefficient is mandatory. However, standard reference instruments (CAPS, MAAP, PAX, PTAAM) are not always available at each measuring site around the world. By integrating all previous published studies conce...
Published in: | Science of The Total Environment |
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2024
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ftunivnovagorica:oai:repozitorij.ung.si:IzpisGradiva.php-id-8841 2024-09-15T17:36:01+00:00 Determining the Aethalometer multiple scattering enhancement factor C from the filter loading parameter Ferrero, Luca Losi, Niccolò Rigler, Martin Gregorič, Asta Colombi, C. D'Angelo, L. Cuccia, E. Cefalì, A. M. Gini, I. Doldi, A. 2024-01-01 application/pdf https://repozitorij.ung.si/IzpisGradiva.php?id=8841 https://repozitorij.ung.si/Dokument.php?id=28563&dn= https://plus.cobiss.net/cobiss/si/sl/bib/183608579 https://hdl.handle.net/20.500.12556/RUNG-8841-946305d0-0ee9-1e26-919d-65b200553522 eng eng Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.scitotenv.2024.170221 info:eu-repo/grantAgreement/ARIS//L1-4386 info:eu-repo/grantAgreement/ARIS//J2-2502 https://repozitorij.ung.si/IzpisGradiva.php?id=8841 https://repozitorij.ung.si/Dokument.php?id=28563&dn= https://plus.cobiss.net/cobiss/si/sl/bib/183608579 http://hdl.handle.net/20.500.12556/RUNG-8841-946305d0-0ee9-1e26-919d-65b200553522 http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess Science of the total environment, vol. 917, no. 170221, pp. 1-20, 2024. ISSN: 0048-9697 aethalometer C factor loading parameter MAAP heating rate info:eu-repo/classification/udc/53 info:eu-repo/semantics/other info:eu-repo/semantics/publishedVersion 2024 ftunivnovagorica https://doi.org/20.500.12556/RUNG-8841-946305d0-0ee9-1e26-919d-65b20055352210.1016/j.scitotenv.2024.170221 2024-08-09T03:06:08Z Light-absorbing aerosols heat the atmosphere an accurate quantification of their absorption coefficient is mandatory. However, standard reference instruments (CAPS, MAAP, PAX, PTAAM) are not always available at each measuring site around the world. By integrating all previous published studies concerning the Aethalometers, the AE33 filter loading parameter, provided by the dual-spot algorithm, were used to determine the multiple scattering enhancement factor from the Aethalometer itself (hereinafter CAE) on an yearly and a monthly basis. The method was developed in Milan, where Aethalometer measurements were compared with MAAP data the comparison showed a good agreement in terms of equivalent black carbon (R2 = 0.93 slope = 1.02 and a negligible intercept = 0.12 μg m−3) leading to a yearly experimental multiple scattering enhancement factor of 2.51 ± 0.04 (hereinafter CMAAP). On a yearly time base the CAE values obtained using the new approach was 2.52 ± 0.01, corresponding to the experimental one (CMAAP). Considering the seasonal behavior, higher experimental CMAAP and computed CAE values were found in summer (2.83 ± 0.12) whereas, the lower ones in winter/early-spring (2.37 ± 0.03), in agreement with the single scattering albedo behavior in the Po Valley. Overall, the agreement between the experimental CMAAP and CAE showed a root mean squared error (RMSE) of just 0.038 on the CMAAP prediction, characterized by a slope close to 1 (1.001 ± 0.178), a negligible intercept (−0.002 ± 0.455) and a high degree of correlation (R2 = 0.955). From an environmental point of view, the application of a dynamic (space/time) determination of CAE increases the accuracy of the aerosol heating rate (compared to applying a fixed C value) up to 16 % solely in Milan, and to 114 % when applied in the Arctic at 80°N. Other/Unknown Material albedo black carbon Repozitorij Univerze v Novi Gorici Science of The Total Environment 917 170221 |
institution |
Open Polar |
collection |
Repozitorij Univerze v Novi Gorici |
op_collection_id |
ftunivnovagorica |
language |
English |
topic |
aethalometer C factor loading parameter MAAP heating rate info:eu-repo/classification/udc/53 |
spellingShingle |
aethalometer C factor loading parameter MAAP heating rate info:eu-repo/classification/udc/53 Ferrero, Luca Losi, Niccolò Rigler, Martin Gregorič, Asta Colombi, C. D'Angelo, L. Cuccia, E. Cefalì, A. M. Gini, I. Doldi, A. Determining the Aethalometer multiple scattering enhancement factor C from the filter loading parameter |
topic_facet |
aethalometer C factor loading parameter MAAP heating rate info:eu-repo/classification/udc/53 |
description |
Light-absorbing aerosols heat the atmosphere an accurate quantification of their absorption coefficient is mandatory. However, standard reference instruments (CAPS, MAAP, PAX, PTAAM) are not always available at each measuring site around the world. By integrating all previous published studies concerning the Aethalometers, the AE33 filter loading parameter, provided by the dual-spot algorithm, were used to determine the multiple scattering enhancement factor from the Aethalometer itself (hereinafter CAE) on an yearly and a monthly basis. The method was developed in Milan, where Aethalometer measurements were compared with MAAP data the comparison showed a good agreement in terms of equivalent black carbon (R2 = 0.93 slope = 1.02 and a negligible intercept = 0.12 μg m−3) leading to a yearly experimental multiple scattering enhancement factor of 2.51 ± 0.04 (hereinafter CMAAP). On a yearly time base the CAE values obtained using the new approach was 2.52 ± 0.01, corresponding to the experimental one (CMAAP). Considering the seasonal behavior, higher experimental CMAAP and computed CAE values were found in summer (2.83 ± 0.12) whereas, the lower ones in winter/early-spring (2.37 ± 0.03), in agreement with the single scattering albedo behavior in the Po Valley. Overall, the agreement between the experimental CMAAP and CAE showed a root mean squared error (RMSE) of just 0.038 on the CMAAP prediction, characterized by a slope close to 1 (1.001 ± 0.178), a negligible intercept (−0.002 ± 0.455) and a high degree of correlation (R2 = 0.955). From an environmental point of view, the application of a dynamic (space/time) determination of CAE increases the accuracy of the aerosol heating rate (compared to applying a fixed C value) up to 16 % solely in Milan, and to 114 % when applied in the Arctic at 80°N. |
format |
Other/Unknown Material |
author |
Ferrero, Luca Losi, Niccolò Rigler, Martin Gregorič, Asta Colombi, C. D'Angelo, L. Cuccia, E. Cefalì, A. M. Gini, I. Doldi, A. |
author_facet |
Ferrero, Luca Losi, Niccolò Rigler, Martin Gregorič, Asta Colombi, C. D'Angelo, L. Cuccia, E. Cefalì, A. M. Gini, I. Doldi, A. |
author_sort |
Ferrero, Luca |
title |
Determining the Aethalometer multiple scattering enhancement factor C from the filter loading parameter |
title_short |
Determining the Aethalometer multiple scattering enhancement factor C from the filter loading parameter |
title_full |
Determining the Aethalometer multiple scattering enhancement factor C from the filter loading parameter |
title_fullStr |
Determining the Aethalometer multiple scattering enhancement factor C from the filter loading parameter |
title_full_unstemmed |
Determining the Aethalometer multiple scattering enhancement factor C from the filter loading parameter |
title_sort |
determining the aethalometer multiple scattering enhancement factor c from the filter loading parameter |
publisher |
Elsevier |
publishDate |
2024 |
url |
https://repozitorij.ung.si/IzpisGradiva.php?id=8841 https://repozitorij.ung.si/Dokument.php?id=28563&dn= https://plus.cobiss.net/cobiss/si/sl/bib/183608579 https://hdl.handle.net/20.500.12556/RUNG-8841-946305d0-0ee9-1e26-919d-65b200553522 |
genre |
albedo black carbon |
genre_facet |
albedo black carbon |
op_source |
Science of the total environment, vol. 917, no. 170221, pp. 1-20, 2024. ISSN: 0048-9697 |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.scitotenv.2024.170221 info:eu-repo/grantAgreement/ARIS//L1-4386 info:eu-repo/grantAgreement/ARIS//J2-2502 https://repozitorij.ung.si/IzpisGradiva.php?id=8841 https://repozitorij.ung.si/Dokument.php?id=28563&dn= https://plus.cobiss.net/cobiss/si/sl/bib/183608579 http://hdl.handle.net/20.500.12556/RUNG-8841-946305d0-0ee9-1e26-919d-65b200553522 |
op_rights |
http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/20.500.12556/RUNG-8841-946305d0-0ee9-1e26-919d-65b20055352210.1016/j.scitotenv.2024.170221 |
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Science of The Total Environment |
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