Regional radiative impact of volcanic aerosol from the 2009 eruption of Mt. Redoubt
High northern latitude eruptions have the potential to release volcanic aerosol into the Arctic environment, perturbing the Arctic's climate system. We present assessments of shortwave (SW), longwave (LW) and net direct aerosol radiative forcing efficiencies and atmospheric heating/cooling rate...
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ftdoajarticles:oai:doaj.org/article:e8527a9285be47ac82a544a7162353f4 2023-05-15T13:12:05+02:00 Regional radiative impact of volcanic aerosol from the 2009 eruption of Mt. Redoubt C. L. Young I. N. Sokolik J. Dufek 2012-04-01T00:00:00Z https://doi.org/10.5194/acp-12-3699-2012 https://doaj.org/article/e8527a9285be47ac82a544a7162353f4 EN eng Copernicus Publications http://www.atmos-chem-phys.net/12/3699/2012/acp-12-3699-2012.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 doi:10.5194/acp-12-3699-2012 1680-7316 1680-7324 https://doaj.org/article/e8527a9285be47ac82a544a7162353f4 Atmospheric Chemistry and Physics, Vol 12, Iss 8, Pp 3699-3715 (2012) Physics QC1-999 Chemistry QD1-999 article 2012 ftdoajarticles https://doi.org/10.5194/acp-12-3699-2012 2022-12-31T04:39:59Z High northern latitude eruptions have the potential to release volcanic aerosol into the Arctic environment, perturbing the Arctic's climate system. We present assessments of shortwave (SW), longwave (LW) and net direct aerosol radiative forcing efficiencies and atmospheric heating/cooling rates caused by volcanic aerosol from the 2009 eruption of Mt. Redoubt by performing radiative transfer modeling constrained by NASA A-Train satellite data. The optical properties of volcanic aerosol were calculated by introducing a compositionally resolved microphysical model developed for both ash and sulfates. Two compositions of volcanic aerosol were considered in order to examine a fresh, ash rich plume and an older, ash poor plume. Optical models were incorporated into a modified version of the SBDART radiative transfer model. Our results indicate that environmental conditions, such as surface albedo and solar zenith angle (SZA), can influence the sign and the magnitude of the radiative forcing at the top of the atmosphere (TOA) and at the surface and the magnitude of the forcing in the aerosol layer. We find that a fresh, thin plume (~2.5–7 km) at an AOD (550 nm) range of 0.18–0.58 and SZA = 55° over snow cools the surface and warms the TOA, but the opposite effect is seen for TOA by the same layer over ocean. The layer over snow also warms by 64 W m −2 AOD −1 more than the same plume over seawater. The layer over snow at SZA = 75° warms the TOA 96 W m −2 AOD −1 less than it would at SZA = 55° over snow, and there is instead warming at the surface. We also find that plume aging can alter the magnitude of the radiative forcing. An aged plume over snow at SZA = 55° would warm the TOA and layer by 146 and 143 W m −2 AOD −1 less than the fresh plume, while the aging plume cools the surface 3 W m −2 AOD −1 more. Comparing results for the thin plume to those for a thick plume (~3–20 km), we find that the fresh, thick plume with AOD(550 nm) = 3, over seawater, and SZA = 55° heats the upper part of the plume in the SW ~28 K day ... Article in Journal/Newspaper albedo Arctic Directory of Open Access Journals: DOAJ Articles Arctic Atmospheric Chemistry and Physics 12 8 3699 3715 |
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op_collection_id |
ftdoajarticles |
language |
English |
topic |
Physics QC1-999 Chemistry QD1-999 |
spellingShingle |
Physics QC1-999 Chemistry QD1-999 C. L. Young I. N. Sokolik J. Dufek Regional radiative impact of volcanic aerosol from the 2009 eruption of Mt. Redoubt |
topic_facet |
Physics QC1-999 Chemistry QD1-999 |
description |
High northern latitude eruptions have the potential to release volcanic aerosol into the Arctic environment, perturbing the Arctic's climate system. We present assessments of shortwave (SW), longwave (LW) and net direct aerosol radiative forcing efficiencies and atmospheric heating/cooling rates caused by volcanic aerosol from the 2009 eruption of Mt. Redoubt by performing radiative transfer modeling constrained by NASA A-Train satellite data. The optical properties of volcanic aerosol were calculated by introducing a compositionally resolved microphysical model developed for both ash and sulfates. Two compositions of volcanic aerosol were considered in order to examine a fresh, ash rich plume and an older, ash poor plume. Optical models were incorporated into a modified version of the SBDART radiative transfer model. Our results indicate that environmental conditions, such as surface albedo and solar zenith angle (SZA), can influence the sign and the magnitude of the radiative forcing at the top of the atmosphere (TOA) and at the surface and the magnitude of the forcing in the aerosol layer. We find that a fresh, thin plume (~2.5–7 km) at an AOD (550 nm) range of 0.18–0.58 and SZA = 55° over snow cools the surface and warms the TOA, but the opposite effect is seen for TOA by the same layer over ocean. The layer over snow also warms by 64 W m −2 AOD −1 more than the same plume over seawater. The layer over snow at SZA = 75° warms the TOA 96 W m −2 AOD −1 less than it would at SZA = 55° over snow, and there is instead warming at the surface. We also find that plume aging can alter the magnitude of the radiative forcing. An aged plume over snow at SZA = 55° would warm the TOA and layer by 146 and 143 W m −2 AOD −1 less than the fresh plume, while the aging plume cools the surface 3 W m −2 AOD −1 more. Comparing results for the thin plume to those for a thick plume (~3–20 km), we find that the fresh, thick plume with AOD(550 nm) = 3, over seawater, and SZA = 55° heats the upper part of the plume in the SW ~28 K day ... |
format |
Article in Journal/Newspaper |
author |
C. L. Young I. N. Sokolik J. Dufek |
author_facet |
C. L. Young I. N. Sokolik J. Dufek |
author_sort |
C. L. Young |
title |
Regional radiative impact of volcanic aerosol from the 2009 eruption of Mt. Redoubt |
title_short |
Regional radiative impact of volcanic aerosol from the 2009 eruption of Mt. Redoubt |
title_full |
Regional radiative impact of volcanic aerosol from the 2009 eruption of Mt. Redoubt |
title_fullStr |
Regional radiative impact of volcanic aerosol from the 2009 eruption of Mt. Redoubt |
title_full_unstemmed |
Regional radiative impact of volcanic aerosol from the 2009 eruption of Mt. Redoubt |
title_sort |
regional radiative impact of volcanic aerosol from the 2009 eruption of mt. redoubt |
publisher |
Copernicus Publications |
publishDate |
2012 |
url |
https://doi.org/10.5194/acp-12-3699-2012 https://doaj.org/article/e8527a9285be47ac82a544a7162353f4 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
albedo Arctic |
genre_facet |
albedo Arctic |
op_source |
Atmospheric Chemistry and Physics, Vol 12, Iss 8, Pp 3699-3715 (2012) |
op_relation |
http://www.atmos-chem-phys.net/12/3699/2012/acp-12-3699-2012.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 doi:10.5194/acp-12-3699-2012 1680-7316 1680-7324 https://doaj.org/article/e8527a9285be47ac82a544a7162353f4 |
op_doi |
https://doi.org/10.5194/acp-12-3699-2012 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
12 |
container_issue |
8 |
container_start_page |
3699 |
op_container_end_page |
3715 |
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1766250304456622080 |