The variability of stratospheric ozone in a 29 year assimilated data set and sensitivity calculations
Consistent observation-based data sets of stratospheric ozone are needed in order to resolve many of the pending questions regarding stratospheric ozone. Satellite observations are available since the late 1970s; however, as most observational methods rely on backscattered sunlight, these do not pro...
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ftsubbremen:oai:media.suub.uni-bremen.de:Publications/elib/220 2023-05-15T15:03:53+02:00 The variability of stratospheric ozone in a 29 year assimilated data set and sensitivity calculations Die Variabilitaet stratosphaerischen Ozons in einem 29-jaehrigen assimilierten Datensatz und Sensitivitaetsrechnungen Kiesewetter, Gregor Burrows, John Notholt, Justus 2011-10-12 application/pdf https://media.suub.uni-bremen.de/handle/elib/220 https://nbn-resolving.org/urn:nbn:de:gbv:46-00102337-17 eng eng Universität Bremen FB1 Physik/Elektrotechnik https://media.suub.uni-bremen.de/handle/elib/220 urn:nbn:de:gbv:46-00102337-17 info:eu-repo/semantics/openAccess stratosphere ozone Arctic data assimilation chemistry-transport modelling ozone recovery chemistry-dynamics interaction annular modes 530 530 Physics ddc:530 Dissertation doctoralThesis 2011 ftsubbremen 2022-11-09T07:09:20Z Consistent observation-based data sets of stratospheric ozone are needed in order to resolve many of the pending questions regarding stratospheric ozone. Satellite observations are available since the late 1970s; however, as most observational methods rely on backscattered sunlight, these do not provide complete long-term coverage of the stratosphere, in particular during polar night. In this PhD thesis, a 29 year data set of stratospheric ozone is introduced that has been generated from sequential assimilation of satellite observations into the Bremen 3D Chemistry Transport Model (CTM). In the method of data assimilation, a three-dimensional physical computer model is used to close the gaps between single measurements. Observations constrain the CTM where available, and at the same time the information is propagated into areas where no observations are available. Here, profile ozone observations from the Solar Backscatter UV (SBUV and SBUV/2) instruments are used, which have been in orbit continuously since 1978. The resulting assimilated data set is validated against independent observations from other satellite platforms and in-situ observations with sondes. Agreement to independent observations is excellent throughout most of the stratosphere, and the assimilated data set can thus be used as a consistent extension of the satellite record beyond the limits of data coverage. The assimilated data set, in conjunction with sensitivity calculations with the unconstrained CTM, is used to analyse the variability of stratospheric ozone during the last three decades on two distinctly different temporal and spatial domains. The first research question deals with the short-term variability of polar ozone during winter. The Arctic ozone layer is subject to large inter-annual variations during spring; although statistical connections between dynamical quantities in winter and springtime total ozone abundance are known, little is known about how ozone anomalies develop and evolve in winter. With its coverage of polar ... Doctoral or Postdoctoral Thesis Arctic polar night Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen) Arctic |
institution |
Open Polar |
collection |
Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen) |
op_collection_id |
ftsubbremen |
language |
English |
topic |
stratosphere ozone Arctic data assimilation chemistry-transport modelling ozone recovery chemistry-dynamics interaction annular modes 530 530 Physics ddc:530 |
spellingShingle |
stratosphere ozone Arctic data assimilation chemistry-transport modelling ozone recovery chemistry-dynamics interaction annular modes 530 530 Physics ddc:530 Kiesewetter, Gregor The variability of stratospheric ozone in a 29 year assimilated data set and sensitivity calculations |
topic_facet |
stratosphere ozone Arctic data assimilation chemistry-transport modelling ozone recovery chemistry-dynamics interaction annular modes 530 530 Physics ddc:530 |
description |
Consistent observation-based data sets of stratospheric ozone are needed in order to resolve many of the pending questions regarding stratospheric ozone. Satellite observations are available since the late 1970s; however, as most observational methods rely on backscattered sunlight, these do not provide complete long-term coverage of the stratosphere, in particular during polar night. In this PhD thesis, a 29 year data set of stratospheric ozone is introduced that has been generated from sequential assimilation of satellite observations into the Bremen 3D Chemistry Transport Model (CTM). In the method of data assimilation, a three-dimensional physical computer model is used to close the gaps between single measurements. Observations constrain the CTM where available, and at the same time the information is propagated into areas where no observations are available. Here, profile ozone observations from the Solar Backscatter UV (SBUV and SBUV/2) instruments are used, which have been in orbit continuously since 1978. The resulting assimilated data set is validated against independent observations from other satellite platforms and in-situ observations with sondes. Agreement to independent observations is excellent throughout most of the stratosphere, and the assimilated data set can thus be used as a consistent extension of the satellite record beyond the limits of data coverage. The assimilated data set, in conjunction with sensitivity calculations with the unconstrained CTM, is used to analyse the variability of stratospheric ozone during the last three decades on two distinctly different temporal and spatial domains. The first research question deals with the short-term variability of polar ozone during winter. The Arctic ozone layer is subject to large inter-annual variations during spring; although statistical connections between dynamical quantities in winter and springtime total ozone abundance are known, little is known about how ozone anomalies develop and evolve in winter. With its coverage of polar ... |
author2 |
Burrows, John Notholt, Justus |
format |
Doctoral or Postdoctoral Thesis |
author |
Kiesewetter, Gregor |
author_facet |
Kiesewetter, Gregor |
author_sort |
Kiesewetter, Gregor |
title |
The variability of stratospheric ozone in a 29 year assimilated data set and sensitivity calculations |
title_short |
The variability of stratospheric ozone in a 29 year assimilated data set and sensitivity calculations |
title_full |
The variability of stratospheric ozone in a 29 year assimilated data set and sensitivity calculations |
title_fullStr |
The variability of stratospheric ozone in a 29 year assimilated data set and sensitivity calculations |
title_full_unstemmed |
The variability of stratospheric ozone in a 29 year assimilated data set and sensitivity calculations |
title_sort |
variability of stratospheric ozone in a 29 year assimilated data set and sensitivity calculations |
publisher |
Universität Bremen |
publishDate |
2011 |
url |
https://media.suub.uni-bremen.de/handle/elib/220 https://nbn-resolving.org/urn:nbn:de:gbv:46-00102337-17 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic polar night |
genre_facet |
Arctic polar night |
op_relation |
https://media.suub.uni-bremen.de/handle/elib/220 urn:nbn:de:gbv:46-00102337-17 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1766335729484431360 |