Coupling groundbased ALOMAR lidar measurements to high resolution global modelling and CALIPSO backscatter assimilation to characterize aerosol properties in the Arctic.
Stratospheric aerosols are involved in cloud formation processes, especially in polar regions where thermodynamical conditions lead to polar stratospheric clouds (PSC) formation. Beside the well-known chemical effect of these clouds on polar ozone, the overall radiative impact of PSC and especially...
Main Authors: | , , , |
---|---|
Other Authors: | , , , |
Format: | Conference Object |
Language: | English |
Published: |
HAL CCSD
2012
|
Subjects: | |
Online Access: | https://hal.science/hal-00707016 |
id |
ftuniversailles:oai:HAL:hal-00707016v1 |
---|---|
record_format |
openpolar |
spelling |
ftuniversailles:oai:HAL:hal-00707016v1 2024-06-23T07:50:44+00:00 Coupling groundbased ALOMAR lidar measurements to high resolution global modelling and CALIPSO backscatter assimilation to characterize aerosol properties in the Arctic. Jumelet, Julien Keckhut, Philippe Bekki, Slimane Vernier, Jean-Paul STRATO - LATMOS Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) NASA Langley Research Center Hampton (LaRC) Vienna, Austria 2012-04-22 https://hal.science/hal-00707016 en eng HAL CCSD hal-00707016 https://hal.science/hal-00707016 BIBCODE: 2012EGUGA.14.9721J EGU General Assembly 2012 https://hal.science/hal-00707016 EGU General Assembly 2012, Apr 2012, Vienna, Austria [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] info:eu-repo/semantics/conferenceObject Conference papers 2012 ftuniversailles 2024-05-24T03:22:44Z Stratospheric aerosols are involved in cloud formation processes, especially in polar regions where thermodynamical conditions lead to polar stratospheric clouds (PSC) formation. Beside the well-known chemical effect of these clouds on polar ozone, the overall radiative impact of PSC and especially stratospheric aerosols remains unclear. Assessing the global stratospheric sulphuric load remains an issue, as measurements require both global coverage and high sensitivity. Volcanic eruptions regularly impact this aerosol budget even at high latitudes, as the stratospheric circulation takes particles throughout the dynamical barriers up to the polar regions. Around the 13th of June, 2011, the Eritrean Nabro volcano experienced a major eruption, injecting dust and particles in the upper troposphere/lower stratosphere. The transport of the newly oxydized aerosols has been reported by the CALIOP/CALIPSO spaceborne lidar. The particles produced significant optical backscatter for several months. We use a high-resolution microphysical-transport model to gain access to the small filamentary structures of the volcanic plume. CALIOP backscatters are assimilated into such a model to provide accurate constraints on the advection over time at stratospheric altitudes, where the horizontal transport is dominant. Validation is locally performed against ground-based lidar measurements acquired at the ALOMAR observatory, where microphysical aerosol properties derived from multiwavelength lidar can be compared to the model-calculated ones. Coupling the advanced detection capabilities of a stratospheric lidar to high-resolution global modelling allows for global assessment of aerosol and cloud surface area densities and volumes, which are of critical importance in ozone depletion processes. Conference Object Arctic Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ Arctic Alomar ENVELOPE(-67.083,-67.083,-68.133,-68.133) |
institution |
Open Polar |
collection |
Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ |
op_collection_id |
ftuniversailles |
language |
English |
topic |
[PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] |
spellingShingle |
[PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] Jumelet, Julien Keckhut, Philippe Bekki, Slimane Vernier, Jean-Paul Coupling groundbased ALOMAR lidar measurements to high resolution global modelling and CALIPSO backscatter assimilation to characterize aerosol properties in the Arctic. |
topic_facet |
[PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] |
description |
Stratospheric aerosols are involved in cloud formation processes, especially in polar regions where thermodynamical conditions lead to polar stratospheric clouds (PSC) formation. Beside the well-known chemical effect of these clouds on polar ozone, the overall radiative impact of PSC and especially stratospheric aerosols remains unclear. Assessing the global stratospheric sulphuric load remains an issue, as measurements require both global coverage and high sensitivity. Volcanic eruptions regularly impact this aerosol budget even at high latitudes, as the stratospheric circulation takes particles throughout the dynamical barriers up to the polar regions. Around the 13th of June, 2011, the Eritrean Nabro volcano experienced a major eruption, injecting dust and particles in the upper troposphere/lower stratosphere. The transport of the newly oxydized aerosols has been reported by the CALIOP/CALIPSO spaceborne lidar. The particles produced significant optical backscatter for several months. We use a high-resolution microphysical-transport model to gain access to the small filamentary structures of the volcanic plume. CALIOP backscatters are assimilated into such a model to provide accurate constraints on the advection over time at stratospheric altitudes, where the horizontal transport is dominant. Validation is locally performed against ground-based lidar measurements acquired at the ALOMAR observatory, where microphysical aerosol properties derived from multiwavelength lidar can be compared to the model-calculated ones. Coupling the advanced detection capabilities of a stratospheric lidar to high-resolution global modelling allows for global assessment of aerosol and cloud surface area densities and volumes, which are of critical importance in ozone depletion processes. |
author2 |
STRATO - LATMOS Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) NASA Langley Research Center Hampton (LaRC) |
format |
Conference Object |
author |
Jumelet, Julien Keckhut, Philippe Bekki, Slimane Vernier, Jean-Paul |
author_facet |
Jumelet, Julien Keckhut, Philippe Bekki, Slimane Vernier, Jean-Paul |
author_sort |
Jumelet, Julien |
title |
Coupling groundbased ALOMAR lidar measurements to high resolution global modelling and CALIPSO backscatter assimilation to characterize aerosol properties in the Arctic. |
title_short |
Coupling groundbased ALOMAR lidar measurements to high resolution global modelling and CALIPSO backscatter assimilation to characterize aerosol properties in the Arctic. |
title_full |
Coupling groundbased ALOMAR lidar measurements to high resolution global modelling and CALIPSO backscatter assimilation to characterize aerosol properties in the Arctic. |
title_fullStr |
Coupling groundbased ALOMAR lidar measurements to high resolution global modelling and CALIPSO backscatter assimilation to characterize aerosol properties in the Arctic. |
title_full_unstemmed |
Coupling groundbased ALOMAR lidar measurements to high resolution global modelling and CALIPSO backscatter assimilation to characterize aerosol properties in the Arctic. |
title_sort |
coupling groundbased alomar lidar measurements to high resolution global modelling and calipso backscatter assimilation to characterize aerosol properties in the arctic. |
publisher |
HAL CCSD |
publishDate |
2012 |
url |
https://hal.science/hal-00707016 |
op_coverage |
Vienna, Austria |
long_lat |
ENVELOPE(-67.083,-67.083,-68.133,-68.133) |
geographic |
Arctic Alomar |
geographic_facet |
Arctic Alomar |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
EGU General Assembly 2012 https://hal.science/hal-00707016 EGU General Assembly 2012, Apr 2012, Vienna, Austria |
op_relation |
hal-00707016 https://hal.science/hal-00707016 BIBCODE: 2012EGUGA.14.9721J |
_version_ |
1802641645453180928 |