Detection of aerosols in Antarctica from long-range transport of the 2009 Australian wildfires
International audience We analyze the long-range transport to high latitudes of a smoke particle filament originating from the southern tropics main plume after the Australian wildfires now colloquially known as ‘Black Saturday’ on February 7th 2009. Using a high-resolution transport/microphysical m...
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ftsorbonneuniv:oai:HAL:insu-04428794v1 2024-09-15T17:42:23+00:00 Detection of aerosols in Antarctica from long-range transport of the 2009 Australian wildfires Jumelet, Julien Tencé, Florent Keckhut, Philippe Bekki, Slimane STRATO - LATMOS Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) Online, Unknown Region 2020-05 https://insu.hal.science/insu-04428794 https://doi.org/10.5194/egusphere-egu2020-18222 en eng HAL CCSD info:eu-repo/semantics/altIdentifier/doi/10.5194/egusphere-egu2020-18222 insu-04428794 https://insu.hal.science/insu-04428794 BIBCODE: 2020EGUGA.2218222J doi:10.5194/egusphere-egu2020-18222 22nd EGU General Assembly 2020 https://insu.hal.science/insu-04428794 22nd EGU General Assembly 2020, May 2020, Online, Unknown Region. pp.EGU2020-18222, ⟨10.5194/egusphere-egu2020-18222⟩ [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/conferenceObject Conference papers 2020 ftsorbonneuniv https://doi.org/10.5194/egusphere-egu2020-18222 2024-07-25T23:47:37Z International audience We analyze the long-range transport to high latitudes of a smoke particle filament originating from the southern tropics main plume after the Australian wildfires now colloquially known as ‘Black Saturday’ on February 7th 2009. Using a high-resolution transport/microphysical model, we show that the monitoring cloud/aerosol lidar instrument operating at the French Antarctic station Dumont d’Urville (DDU - 66°S - 140°E) recorded a signature of those aerosols. The 532 nm scattering ratio of this thin aerosol structure is comparable to typical moderate stratospheric volcanic plume, with values between 1.4 and 1.6 on the 1st and 3rd days of March above DDU station at around the 14 and 16 km altitude respectively.In this study, a dedicated model is described and its ability to track down such fine optical signatures at the global scale is assessed and validated against the Antarctic lidar measurements. Using one month of tropical CALIOP/CALIPSO data as a minimal support to a relatively simple microphysical scheme, we report modeled presence of the aerosols above DDU station after advection of the aerosol size distribution. The space-borne lidar data provide constraints to the microphysical evolution during the simulation and ensure reliable long-range transport of the particles as well as accurate rendering of the plume small-scale features below the 1°x1° resolution threshold.This case study of smoke particle signature identification above Antarctica provides strong evidence that biomass burning events, alongside volcanic eruptions, have to be considered as processes able to inject significant amounts of material up to stratospheric altitudes. Among the questions arising out of this study, we highlight the occurrence and imprint of such smoke particles on the Antarctic atmosphere over larger time scales. Any degree of underestimation of the global impact of such deep particle transport will lead to uncertainties in modeling the associated chemical or radiative effects, especially in polar ... Conference Object Antarc* Antarctic Antarctica HAL Sorbonne Université |
institution |
Open Polar |
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HAL Sorbonne Université |
op_collection_id |
ftsorbonneuniv |
language |
English |
topic |
[SDU]Sciences of the Universe [physics] |
spellingShingle |
[SDU]Sciences of the Universe [physics] Jumelet, Julien Tencé, Florent Keckhut, Philippe Bekki, Slimane Detection of aerosols in Antarctica from long-range transport of the 2009 Australian wildfires |
topic_facet |
[SDU]Sciences of the Universe [physics] |
description |
International audience We analyze the long-range transport to high latitudes of a smoke particle filament originating from the southern tropics main plume after the Australian wildfires now colloquially known as ‘Black Saturday’ on February 7th 2009. Using a high-resolution transport/microphysical model, we show that the monitoring cloud/aerosol lidar instrument operating at the French Antarctic station Dumont d’Urville (DDU - 66°S - 140°E) recorded a signature of those aerosols. The 532 nm scattering ratio of this thin aerosol structure is comparable to typical moderate stratospheric volcanic plume, with values between 1.4 and 1.6 on the 1st and 3rd days of March above DDU station at around the 14 and 16 km altitude respectively.In this study, a dedicated model is described and its ability to track down such fine optical signatures at the global scale is assessed and validated against the Antarctic lidar measurements. Using one month of tropical CALIOP/CALIPSO data as a minimal support to a relatively simple microphysical scheme, we report modeled presence of the aerosols above DDU station after advection of the aerosol size distribution. The space-borne lidar data provide constraints to the microphysical evolution during the simulation and ensure reliable long-range transport of the particles as well as accurate rendering of the plume small-scale features below the 1°x1° resolution threshold.This case study of smoke particle signature identification above Antarctica provides strong evidence that biomass burning events, alongside volcanic eruptions, have to be considered as processes able to inject significant amounts of material up to stratospheric altitudes. Among the questions arising out of this study, we highlight the occurrence and imprint of such smoke particles on the Antarctic atmosphere over larger time scales. Any degree of underestimation of the global impact of such deep particle transport will lead to uncertainties in modeling the associated chemical or radiative effects, especially in polar ... |
author2 |
STRATO - LATMOS Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) |
format |
Conference Object |
author |
Jumelet, Julien Tencé, Florent Keckhut, Philippe Bekki, Slimane |
author_facet |
Jumelet, Julien Tencé, Florent Keckhut, Philippe Bekki, Slimane |
author_sort |
Jumelet, Julien |
title |
Detection of aerosols in Antarctica from long-range transport of the 2009 Australian wildfires |
title_short |
Detection of aerosols in Antarctica from long-range transport of the 2009 Australian wildfires |
title_full |
Detection of aerosols in Antarctica from long-range transport of the 2009 Australian wildfires |
title_fullStr |
Detection of aerosols in Antarctica from long-range transport of the 2009 Australian wildfires |
title_full_unstemmed |
Detection of aerosols in Antarctica from long-range transport of the 2009 Australian wildfires |
title_sort |
detection of aerosols in antarctica from long-range transport of the 2009 australian wildfires |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://insu.hal.science/insu-04428794 https://doi.org/10.5194/egusphere-egu2020-18222 |
op_coverage |
Online, Unknown Region |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
22nd EGU General Assembly 2020 https://insu.hal.science/insu-04428794 22nd EGU General Assembly 2020, May 2020, Online, Unknown Region. pp.EGU2020-18222, ⟨10.5194/egusphere-egu2020-18222⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/egusphere-egu2020-18222 insu-04428794 https://insu.hal.science/insu-04428794 BIBCODE: 2020EGUGA.2218222J doi:10.5194/egusphere-egu2020-18222 |
op_doi |
https://doi.org/10.5194/egusphere-egu2020-18222 |
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1810488940490129408 |