Radiative impact of an extreme Arctic biomass-burning event
The aim of the presented study was to investigate the impact on the radiation budget of a biomass-burning plume, transported from Alaska to the High Arctic region of Ny-Ålesund, Svalbard, in early July 2015. Since the mean aerosol optical depth increased by the factor of 10 above the average summer...
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Online Access: | https://doi.org/10.5194/acp-18-8829-2018 https://doaj.org/article/2d6fa6f45a534d6e922d002227cb4186 |
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ftdoajarticles:oai:doaj.org/article:2d6fa6f45a534d6e922d002227cb4186 2023-05-15T13:11:52+02:00 Radiative impact of an extreme Arctic biomass-burning event J. Lisok A. Rozwadowska J. G. Pedersen K. M. Markowicz C. Ritter J. W. Kaminski J. Struzewska M. Mazzola R. Udisti S. Becagli I. Gorecka 2018-06-01T00:00:00Z https://doi.org/10.5194/acp-18-8829-2018 https://doaj.org/article/2d6fa6f45a534d6e922d002227cb4186 EN eng Copernicus Publications https://www.atmos-chem-phys.net/18/8829/2018/acp-18-8829-2018.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 doi:10.5194/acp-18-8829-2018 1680-7316 1680-7324 https://doaj.org/article/2d6fa6f45a534d6e922d002227cb4186 Atmospheric Chemistry and Physics, Vol 18, Pp 8829-8848 (2018) Physics QC1-999 Chemistry QD1-999 article 2018 ftdoajarticles https://doi.org/10.5194/acp-18-8829-2018 2022-12-30T21:57:18Z The aim of the presented study was to investigate the impact on the radiation budget of a biomass-burning plume, transported from Alaska to the High Arctic region of Ny-Ålesund, Svalbard, in early July 2015. Since the mean aerosol optical depth increased by the factor of 10 above the average summer background values, this large aerosol load event is considered particularly exceptional in the last 25 years. In situ data with hygroscopic growth equations, as well as remote sensing measurements as inputs to radiative transfer models, were used, in order to estimate biases associated with (i) hygroscopicity, (ii) variability of single-scattering albedo profiles, and (iii) plane-parallel closure of the modelled atmosphere. A chemical weather model with satellite-derived biomass-burning emissions was applied to interpret the transport and transformation pathways. The provided MODTRAN radiative transfer model (RTM) simulations for the smoke event (14:00 9 July–11:30 11 July) resulted in a mean aerosol direct radiative forcing at the levels of −78.9 and −47.0 W m −2 at the surface and at the top of the atmosphere, respectively, for the mean value of aerosol optical depth equal to 0.64 at 550 nm. This corresponded to the average clear-sky direct radiative forcing of −43.3 W m −2 , estimated by radiometer and model simulations at the surface. Ultimately, uncertainty associated with the plane-parallel atmosphere approximation altered results by about 2 W m −2 . Furthermore, model-derived aerosol direct radiative forcing efficiency reached on average −126 W m −2 ∕ τ 550 and −71 W m −2 ∕ τ 550 at the surface and at the top of the atmosphere, respectively. The heating rate, estimated at up to 1.8 K day −1 inside the biomass-burning plume, implied vertical mixing with turbulent kinetic energy of 0.3 m 2 s −2 . Article in Journal/Newspaper albedo Arctic Ny Ålesund Ny-Ålesund Svalbard Alaska Directory of Open Access Journals: DOAJ Articles Arctic Svalbard Ny-Ålesund Atmospheric Chemistry and Physics 18 12 8829 8848 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Physics QC1-999 Chemistry QD1-999 |
spellingShingle |
Physics QC1-999 Chemistry QD1-999 J. Lisok A. Rozwadowska J. G. Pedersen K. M. Markowicz C. Ritter J. W. Kaminski J. Struzewska M. Mazzola R. Udisti S. Becagli I. Gorecka Radiative impact of an extreme Arctic biomass-burning event |
topic_facet |
Physics QC1-999 Chemistry QD1-999 |
description |
The aim of the presented study was to investigate the impact on the radiation budget of a biomass-burning plume, transported from Alaska to the High Arctic region of Ny-Ålesund, Svalbard, in early July 2015. Since the mean aerosol optical depth increased by the factor of 10 above the average summer background values, this large aerosol load event is considered particularly exceptional in the last 25 years. In situ data with hygroscopic growth equations, as well as remote sensing measurements as inputs to radiative transfer models, were used, in order to estimate biases associated with (i) hygroscopicity, (ii) variability of single-scattering albedo profiles, and (iii) plane-parallel closure of the modelled atmosphere. A chemical weather model with satellite-derived biomass-burning emissions was applied to interpret the transport and transformation pathways. The provided MODTRAN radiative transfer model (RTM) simulations for the smoke event (14:00 9 July–11:30 11 July) resulted in a mean aerosol direct radiative forcing at the levels of −78.9 and −47.0 W m −2 at the surface and at the top of the atmosphere, respectively, for the mean value of aerosol optical depth equal to 0.64 at 550 nm. This corresponded to the average clear-sky direct radiative forcing of −43.3 W m −2 , estimated by radiometer and model simulations at the surface. Ultimately, uncertainty associated with the plane-parallel atmosphere approximation altered results by about 2 W m −2 . Furthermore, model-derived aerosol direct radiative forcing efficiency reached on average −126 W m −2 ∕ τ 550 and −71 W m −2 ∕ τ 550 at the surface and at the top of the atmosphere, respectively. The heating rate, estimated at up to 1.8 K day −1 inside the biomass-burning plume, implied vertical mixing with turbulent kinetic energy of 0.3 m 2 s −2 . |
format |
Article in Journal/Newspaper |
author |
J. Lisok A. Rozwadowska J. G. Pedersen K. M. Markowicz C. Ritter J. W. Kaminski J. Struzewska M. Mazzola R. Udisti S. Becagli I. Gorecka |
author_facet |
J. Lisok A. Rozwadowska J. G. Pedersen K. M. Markowicz C. Ritter J. W. Kaminski J. Struzewska M. Mazzola R. Udisti S. Becagli I. Gorecka |
author_sort |
J. Lisok |
title |
Radiative impact of an extreme Arctic biomass-burning event |
title_short |
Radiative impact of an extreme Arctic biomass-burning event |
title_full |
Radiative impact of an extreme Arctic biomass-burning event |
title_fullStr |
Radiative impact of an extreme Arctic biomass-burning event |
title_full_unstemmed |
Radiative impact of an extreme Arctic biomass-burning event |
title_sort |
radiative impact of an extreme arctic biomass-burning event |
publisher |
Copernicus Publications |
publishDate |
2018 |
url |
https://doi.org/10.5194/acp-18-8829-2018 https://doaj.org/article/2d6fa6f45a534d6e922d002227cb4186 |
geographic |
Arctic Svalbard Ny-Ålesund |
geographic_facet |
Arctic Svalbard Ny-Ålesund |
genre |
albedo Arctic Ny Ålesund Ny-Ålesund Svalbard Alaska |
genre_facet |
albedo Arctic Ny Ålesund Ny-Ålesund Svalbard Alaska |
op_source |
Atmospheric Chemistry and Physics, Vol 18, Pp 8829-8848 (2018) |
op_relation |
https://www.atmos-chem-phys.net/18/8829/2018/acp-18-8829-2018.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 doi:10.5194/acp-18-8829-2018 1680-7316 1680-7324 https://doaj.org/article/2d6fa6f45a534d6e922d002227cb4186 |
op_doi |
https://doi.org/10.5194/acp-18-8829-2018 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
18 |
container_issue |
12 |
container_start_page |
8829 |
op_container_end_page |
8848 |
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1766249312356925440 |