The unprecedented 2017-2018 stratospheric smoke event: decay phase and aerosol properties observed with the EARLINET
Six months of stratospheric aerosol observations with the European Aerosol Research Lidar Network (EARLINET) from August 2017 to January 2018 are presented. The decay phase of an unprecedented, record-breaking stratospheric perturbation caused by wildfire smoke is reported and discussed in terms of...
Published in: | Atmospheric Chemistry and Physics |
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Main Authors: | , , , , |
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Format: | Article in Journal/Newspaper |
Language: | English |
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European Geosciences Union (EGU)
2019
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Online Access: | http://hdl.handle.net/2117/177584 https://doi.org/10.5194/acp-19-15183-2019 |
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ftupcatalunyair:oai:upcommons.upc.edu:2117/177584 |
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record_format |
openpolar |
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Open Polar |
collection |
Universitat Politècnica de Catalunya, BarcelonaTech: UPCommons - Global access to UPC knowledge |
op_collection_id |
ftupcatalunyair |
language |
English |
topic |
Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Teledetecció Àrees temàtiques de la UPC::Desenvolupament humà i sostenible::Degradació ambiental::Contaminació atmosfèrica Remote sensing Atmospheric aerosols Atmospheric chemistry Physics Teledetecció Aerosols atmosfèrics |
spellingShingle |
Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Teledetecció Àrees temàtiques de la UPC::Desenvolupament humà i sostenible::Degradació ambiental::Contaminació atmosfèrica Remote sensing Atmospheric aerosols Atmospheric chemistry Physics Teledetecció Aerosols atmosfèrics Baars, Holger Ansmann, Albert Ohneiser, Kevin Sicard, Michaël Comerón Tejero, Adolfo The unprecedented 2017-2018 stratospheric smoke event: decay phase and aerosol properties observed with the EARLINET |
topic_facet |
Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Teledetecció Àrees temàtiques de la UPC::Desenvolupament humà i sostenible::Degradació ambiental::Contaminació atmosfèrica Remote sensing Atmospheric aerosols Atmospheric chemistry Physics Teledetecció Aerosols atmosfèrics |
description |
Six months of stratospheric aerosol observations with the European Aerosol Research Lidar Network (EARLINET) from August 2017 to January 2018 are presented. The decay phase of an unprecedented, record-breaking stratospheric perturbation caused by wildfire smoke is reported and discussed in terms of geometrical, optical, and microphysical aerosol properties. Enormous amounts of smoke were injected into the upper troposphere and lower stratosphere over fire areas in western Canada on 12 August 2017 during strong thunderstorm–pyrocumulonimbus activity. The stratospheric fire plumes spread over the entire Northern Hemisphere in the following weeks and months. Twenty-eight European lidar stations from northern Norway to southern Portugal and the eastern Mediterranean monitored the strong stratospheric perturbation on a continental scale. The main smoke layer (over central, western, southern, and eastern Europe) was found at heights between 15 and 20¿km since September 2017 (about 2 weeks after entering the stratosphere). Thin layers of smoke were detected at heights of up to 22–23¿km. The stratospheric aerosol optical thickness at 532¿nm decreased from values >¿0.25 on 21–23 August 2017 to 0.005–0.03 until 5–10 September and was mainly 0.003–0.004 from October to December 2017 and thus was still significantly above the stratospheric background (0.001–0.002). Stratospheric particle extinction coefficients (532¿nm) were as high as 50–200¿Mm-1 until the beginning of September and on the order of 1¿Mm-1 (0.5–5¿Mm-1) from October 2017 until the end of January 2018. The corresponding layer mean particle mass concentration was on the order of 0.05–0.5¿µg¿m-3 over these months. Soot particles (light-absorbing carbonaceous particles) are efficient ice-nucleating particles (INPs) at upper tropospheric (cirrus) temperatures and available to influence cirrus formation when entering the tropopause from above. We estimated INP concentrations of 50–500¿L-1 until the first days in September and afterwards 5–50¿L-1 until the end ... |
author2 |
Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions Universitat Politècnica de Catalunya. RSLAB - Grup de Recerca en Teledetecció |
format |
Article in Journal/Newspaper |
author |
Baars, Holger Ansmann, Albert Ohneiser, Kevin Sicard, Michaël Comerón Tejero, Adolfo |
author_facet |
Baars, Holger Ansmann, Albert Ohneiser, Kevin Sicard, Michaël Comerón Tejero, Adolfo |
author_sort |
Baars, Holger |
title |
The unprecedented 2017-2018 stratospheric smoke event: decay phase and aerosol properties observed with the EARLINET |
title_short |
The unprecedented 2017-2018 stratospheric smoke event: decay phase and aerosol properties observed with the EARLINET |
title_full |
The unprecedented 2017-2018 stratospheric smoke event: decay phase and aerosol properties observed with the EARLINET |
title_fullStr |
The unprecedented 2017-2018 stratospheric smoke event: decay phase and aerosol properties observed with the EARLINET |
title_full_unstemmed |
The unprecedented 2017-2018 stratospheric smoke event: decay phase and aerosol properties observed with the EARLINET |
title_sort |
unprecedented 2017-2018 stratospheric smoke event: decay phase and aerosol properties observed with the earlinet |
publisher |
European Geosciences Union (EGU) |
publishDate |
2019 |
url |
http://hdl.handle.net/2117/177584 https://doi.org/10.5194/acp-19-15183-2019 |
genre |
Northern Norway |
genre_facet |
Northern Norway |
op_relation |
https://www.atmos-chem-phys.net/19/15183/2019/ info:eu-repo/grantAgreement/EC/FP7/603445/EU/Impact of Biogenic versus Anthropogenic emissions on Clouds and Climate: towards a Holistic UnderStanding/BACCHUS info:eu-repo/grantAgreement/EC/H2020/654109/EU/Aerosols, Clouds, and Trace gases Research InfraStructure/ACTRIS-2 info:eu-repo/grantAgreement/EC/H2020/763643/EU/ERATOSTHENES: Excellence Research Centre for Earth Surveillance and Space-Based Monitoring of the Environment/EXCELSIOR info:eu-repo/grantAgreement/EC/H2020/778349/EU/Development of GRASP radiative transfer code for the retrieval of aerosol microphysics vertical-profiles from space measurements and its impact in ACE mission/GRASP-ACE info:eu-repo/grantAgreement/MINECO//TEC2015-63832-P/ES/TELEDETECCION LIDAR ATMOSFERICA Y OBSERVACIONES COOPERATIVAS: EXPLOTACION, PROCESADO DE LA SEÑAL Y BALANCE RADIATIVO./ info:eu-repo/grantAgreement/MINECO/1PE/MDM-2016-0600 Baars, H. [et al.]. The unprecedented 2017-2018 stratospheric smoke event: decay phase and aerosol properties observed with the EARLINET. "Atmospheric chemistry and physics", 13 Desembre 2019, vol. 19, núm. 23, p. 15183-15198. 1680-7316 http://hdl.handle.net/2117/177584 doi:10.5194/acp-19-15183-2019 |
op_rights |
Attribution-NonCommercial-NoDerivs 3.0 Spain http://creativecommons.org/licenses/by-nc-nd/3.0/es/ Open Access |
op_doi |
https://doi.org/10.5194/acp-19-15183-2019 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
19 |
container_issue |
23 |
container_start_page |
15183 |
op_container_end_page |
15198 |
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1810466386206523392 |
spelling |
ftupcatalunyair:oai:upcommons.upc.edu:2117/177584 2024-09-15T18:25:55+00:00 The unprecedented 2017-2018 stratospheric smoke event: decay phase and aerosol properties observed with the EARLINET Baars, Holger Ansmann, Albert Ohneiser, Kevin Sicard, Michaël Comerón Tejero, Adolfo Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions Universitat Politècnica de Catalunya. RSLAB - Grup de Recerca en Teledetecció 2019-12-13 16 p. application/pdf http://hdl.handle.net/2117/177584 https://doi.org/10.5194/acp-19-15183-2019 eng eng European Geosciences Union (EGU) https://www.atmos-chem-phys.net/19/15183/2019/ info:eu-repo/grantAgreement/EC/FP7/603445/EU/Impact of Biogenic versus Anthropogenic emissions on Clouds and Climate: towards a Holistic UnderStanding/BACCHUS info:eu-repo/grantAgreement/EC/H2020/654109/EU/Aerosols, Clouds, and Trace gases Research InfraStructure/ACTRIS-2 info:eu-repo/grantAgreement/EC/H2020/763643/EU/ERATOSTHENES: Excellence Research Centre for Earth Surveillance and Space-Based Monitoring of the Environment/EXCELSIOR info:eu-repo/grantAgreement/EC/H2020/778349/EU/Development of GRASP radiative transfer code for the retrieval of aerosol microphysics vertical-profiles from space measurements and its impact in ACE mission/GRASP-ACE info:eu-repo/grantAgreement/MINECO//TEC2015-63832-P/ES/TELEDETECCION LIDAR ATMOSFERICA Y OBSERVACIONES COOPERATIVAS: EXPLOTACION, PROCESADO DE LA SEÑAL Y BALANCE RADIATIVO./ info:eu-repo/grantAgreement/MINECO/1PE/MDM-2016-0600 Baars, H. [et al.]. The unprecedented 2017-2018 stratospheric smoke event: decay phase and aerosol properties observed with the EARLINET. "Atmospheric chemistry and physics", 13 Desembre 2019, vol. 19, núm. 23, p. 15183-15198. 1680-7316 http://hdl.handle.net/2117/177584 doi:10.5194/acp-19-15183-2019 Attribution-NonCommercial-NoDerivs 3.0 Spain http://creativecommons.org/licenses/by-nc-nd/3.0/es/ Open Access Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Teledetecció Àrees temàtiques de la UPC::Desenvolupament humà i sostenible::Degradació ambiental::Contaminació atmosfèrica Remote sensing Atmospheric aerosols Atmospheric chemistry Physics Teledetecció Aerosols atmosfèrics Article 2019 ftupcatalunyair https://doi.org/10.5194/acp-19-15183-2019 2024-07-25T10:52:12Z Six months of stratospheric aerosol observations with the European Aerosol Research Lidar Network (EARLINET) from August 2017 to January 2018 are presented. The decay phase of an unprecedented, record-breaking stratospheric perturbation caused by wildfire smoke is reported and discussed in terms of geometrical, optical, and microphysical aerosol properties. Enormous amounts of smoke were injected into the upper troposphere and lower stratosphere over fire areas in western Canada on 12 August 2017 during strong thunderstorm–pyrocumulonimbus activity. The stratospheric fire plumes spread over the entire Northern Hemisphere in the following weeks and months. Twenty-eight European lidar stations from northern Norway to southern Portugal and the eastern Mediterranean monitored the strong stratospheric perturbation on a continental scale. The main smoke layer (over central, western, southern, and eastern Europe) was found at heights between 15 and 20¿km since September 2017 (about 2 weeks after entering the stratosphere). Thin layers of smoke were detected at heights of up to 22–23¿km. The stratospheric aerosol optical thickness at 532¿nm decreased from values >¿0.25 on 21–23 August 2017 to 0.005–0.03 until 5–10 September and was mainly 0.003–0.004 from October to December 2017 and thus was still significantly above the stratospheric background (0.001–0.002). Stratospheric particle extinction coefficients (532¿nm) were as high as 50–200¿Mm-1 until the beginning of September and on the order of 1¿Mm-1 (0.5–5¿Mm-1) from October 2017 until the end of January 2018. The corresponding layer mean particle mass concentration was on the order of 0.05–0.5¿µg¿m-3 over these months. Soot particles (light-absorbing carbonaceous particles) are efficient ice-nucleating particles (INPs) at upper tropospheric (cirrus) temperatures and available to influence cirrus formation when entering the tropopause from above. We estimated INP concentrations of 50–500¿L-1 until the first days in September and afterwards 5–50¿L-1 until the end ... Article in Journal/Newspaper Northern Norway Universitat Politècnica de Catalunya, BarcelonaTech: UPCommons - Global access to UPC knowledge Atmospheric Chemistry and Physics 19 23 15183 15198 |