Stratospheric circulation changes: investigations using multidecadal observations and simulations of inorganic fluorine
The intense human activity of the past two hundred years has perturbed the subtle balance existing between the spheres of the Earth system. The atmospheric composition has been modified with massive emissions of greenhouse gases and substances depleting the life-essential ozone layer (ODSs). The mos...
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ftorbi:oai:orbi.ulg.ac.be:2268/260555 2024-04-21T07:50:42+00:00 Stratospheric circulation changes: investigations using multidecadal observations and simulations of inorganic fluorine Prignon, Maxime Mahieu, Emmanuel 2021-05-28 https://orbi.uliege.be/handle/2268/260555 https://orbi.uliege.be/bitstream/2268/260555/1/Prignon_thesis_orbi.pdf en eng ULiège - Université de Liège https://orbi.uliege.be/handle/2268/260555 info:hdl:2268/260555 https://orbi.uliege.be/bitstream/2268/260555/1/Prignon_thesis_orbi.pdf open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess Inorganic fluorine stratopshere circulation changes Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique doctoral thesis http://purl.org/coar/resource_type/c_db06 info:eu-repo/semantics/doctoralThesis 2021 ftorbi 2024-03-27T14:51:27Z The intense human activity of the past two hundred years has perturbed the subtle balance existing between the spheres of the Earth system. The atmospheric composition has been modified with massive emissions of greenhouse gases and substances depleting the life-essential ozone layer (ODSs). The most known to the general public resulting changes are certainly the global warming of the troposphere and the dramatic formation of the Antarctic ozone hole. However, it is less generally known that the most robustly modelled response to the increase of greenhouse gases, and the resulting global warming, is a speeding-up of the transport circulation occurring in the stratosphere, the atmospheric layer that is situated well above our head, between 10 and 50 km. This transport circulation, referred to as the Brewer-Dobson circulation (BDC), controls the distribution of ozone and other long-lived gaseous constituents of the stratosphere. Therefore, it is crucial to characterize the BDC and its changes to assess precisely the healing of the ozone layer, expected to occur gradually in the twenty-first century as most of ODS emissions have been successfully phased out by the Montreal Protocol on Substances that Deplete the Ozone Layer, including its Amendments and Adjustments. In this work, we investigated BDC changes through their impact on multidecadal time-series of stratospheric fluorine. To this end, we include ground-based Fourier transform infrared time-series from Jungfraujoch (Switzerland, 46°N) and Lauder (New Zealand, 45°S), Atmospheric Chemistry Experiment – Fourier Transform Spectrometer (ACE-FTS) satellite time-series and five simulations performed by the BASCOE chemical-transport model (CTM). These simulations are driven by the five modern meteorological reanalyses of the atmosphere. Thus, we assess the representation of the investigated BDC changes in state-of-the-art reanalyses which are designed to represent at best the atmospheric state over the past 30 years. We first improved the retrieval strategy of ... Doctoral or Postdoctoral Thesis Antarc* Antarctic University of Liège: ORBi (Open Repository and Bibliography) |
institution |
Open Polar |
collection |
University of Liège: ORBi (Open Repository and Bibliography) |
op_collection_id |
ftorbi |
language |
English |
topic |
Inorganic fluorine stratopshere circulation changes Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique |
spellingShingle |
Inorganic fluorine stratopshere circulation changes Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique Prignon, Maxime Stratospheric circulation changes: investigations using multidecadal observations and simulations of inorganic fluorine |
topic_facet |
Inorganic fluorine stratopshere circulation changes Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique |
description |
The intense human activity of the past two hundred years has perturbed the subtle balance existing between the spheres of the Earth system. The atmospheric composition has been modified with massive emissions of greenhouse gases and substances depleting the life-essential ozone layer (ODSs). The most known to the general public resulting changes are certainly the global warming of the troposphere and the dramatic formation of the Antarctic ozone hole. However, it is less generally known that the most robustly modelled response to the increase of greenhouse gases, and the resulting global warming, is a speeding-up of the transport circulation occurring in the stratosphere, the atmospheric layer that is situated well above our head, between 10 and 50 km. This transport circulation, referred to as the Brewer-Dobson circulation (BDC), controls the distribution of ozone and other long-lived gaseous constituents of the stratosphere. Therefore, it is crucial to characterize the BDC and its changes to assess precisely the healing of the ozone layer, expected to occur gradually in the twenty-first century as most of ODS emissions have been successfully phased out by the Montreal Protocol on Substances that Deplete the Ozone Layer, including its Amendments and Adjustments. In this work, we investigated BDC changes through their impact on multidecadal time-series of stratospheric fluorine. To this end, we include ground-based Fourier transform infrared time-series from Jungfraujoch (Switzerland, 46°N) and Lauder (New Zealand, 45°S), Atmospheric Chemistry Experiment – Fourier Transform Spectrometer (ACE-FTS) satellite time-series and five simulations performed by the BASCOE chemical-transport model (CTM). These simulations are driven by the five modern meteorological reanalyses of the atmosphere. Thus, we assess the representation of the investigated BDC changes in state-of-the-art reanalyses which are designed to represent at best the atmospheric state over the past 30 years. We first improved the retrieval strategy of ... |
author2 |
Mahieu, Emmanuel |
format |
Doctoral or Postdoctoral Thesis |
author |
Prignon, Maxime |
author_facet |
Prignon, Maxime |
author_sort |
Prignon, Maxime |
title |
Stratospheric circulation changes: investigations using multidecadal observations and simulations of inorganic fluorine |
title_short |
Stratospheric circulation changes: investigations using multidecadal observations and simulations of inorganic fluorine |
title_full |
Stratospheric circulation changes: investigations using multidecadal observations and simulations of inorganic fluorine |
title_fullStr |
Stratospheric circulation changes: investigations using multidecadal observations and simulations of inorganic fluorine |
title_full_unstemmed |
Stratospheric circulation changes: investigations using multidecadal observations and simulations of inorganic fluorine |
title_sort |
stratospheric circulation changes: investigations using multidecadal observations and simulations of inorganic fluorine |
publisher |
ULiège - Université de Liège |
publishDate |
2021 |
url |
https://orbi.uliege.be/handle/2268/260555 https://orbi.uliege.be/bitstream/2268/260555/1/Prignon_thesis_orbi.pdf |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
https://orbi.uliege.be/handle/2268/260555 info:hdl:2268/260555 https://orbi.uliege.be/bitstream/2268/260555/1/Prignon_thesis_orbi.pdf |
op_rights |
open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess |
_version_ |
1796934320029433856 |