O 3 variability in the troposphere from IASI observations in 2008-2015
International audience We present geographical patterns of ozone (O 3 ) variability in the troposphere derived from 8 years of IASI observations (2008-2015). The instrument provides a unique dataset of global vertically-resolved O 3 profiles with a twice daily global coverage and a fairly good verti...
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ftuniversailles:oai:HAL:insu-01369317v1 2023-07-30T04:05:31+02:00 O 3 variability in the troposphere from IASI observations in 2008-2015 Wespes, Catherine Hurtmans, Daniel Boynard, Anne Clerbaux, Cathy Coheur, Pierre-François Spectroscopie de l'atmosphère, Service de Chimie Quantique et Photophysique Université libre de Bruxelles (ULB) TROPO - 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) International Ozone Commission Edinburgh, United Kingdom 2016-09-04 https://insu.hal.science/insu-01369317 en eng HAL CCSD insu-01369317 https://insu.hal.science/insu-01369317 Quadrennial Ozone Symposium 2016 https://insu.hal.science/insu-01369317 Quadrennial Ozone Symposium 2016, International Ozone Commission, Sep 2016, Edinburgh, United Kingdom. pp.QOS2016-299 [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] info:eu-repo/semantics/conferenceObject Conference papers 2016 ftuniversailles 2023-07-16T21:24:35Z International audience We present geographical patterns of ozone (O 3 ) variability in the troposphere derived from 8 years of IASI observations (2008-2015). The instrument provides a unique dataset of global vertically-resolved O 3 profiles with a twice daily global coverage and a fairly good vertical resolution in the troposphere allowing us to monitor the year-to-year variability in that layer. The retrievals are performed using the FORLI software, a fast radiative trans- fer model based on the optimal estimation method, set up for near real time and large scale processing of IASI data.Multivariate regressions which include important geophysical drivers of O 3 variation (e.g. solar flux - SF, quasi biennial oscillations - QBO, El Niño/Southern Oscillation - ENSO, North Atlantic Oscillation-NAO) and a linear trend term have been performed on time series of spatially averaged O 3 on spatial grids. The performances of the regression models (annual vs seasonal) and the effect of the spatial resolution are first investigated. The resulting covariates and trend spatial structures are then analyzed. Direct effects of NAO and of positive (or negatives) ENSO indexes measured during moderate to intense El Niño (or La Niña) episodes in 2009 and 2015 (or 2010) observed in the ozone columns in the tropics will be discussed. We will also focus on O 3 trends over and downwind anthropogenic polluted areas characterized either by increased (e.g. over Asia) or decreased (e.g. over Europe and the US) O 3 precursor emissions. Conference Object North Atlantic North Atlantic oscillation Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ |
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] Wespes, Catherine Hurtmans, Daniel Boynard, Anne Clerbaux, Cathy Coheur, Pierre-François O 3 variability in the troposphere from IASI observations in 2008-2015 |
topic_facet |
[PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] |
description |
International audience We present geographical patterns of ozone (O 3 ) variability in the troposphere derived from 8 years of IASI observations (2008-2015). The instrument provides a unique dataset of global vertically-resolved O 3 profiles with a twice daily global coverage and a fairly good vertical resolution in the troposphere allowing us to monitor the year-to-year variability in that layer. The retrievals are performed using the FORLI software, a fast radiative trans- fer model based on the optimal estimation method, set up for near real time and large scale processing of IASI data.Multivariate regressions which include important geophysical drivers of O 3 variation (e.g. solar flux - SF, quasi biennial oscillations - QBO, El Niño/Southern Oscillation - ENSO, North Atlantic Oscillation-NAO) and a linear trend term have been performed on time series of spatially averaged O 3 on spatial grids. The performances of the regression models (annual vs seasonal) and the effect of the spatial resolution are first investigated. The resulting covariates and trend spatial structures are then analyzed. Direct effects of NAO and of positive (or negatives) ENSO indexes measured during moderate to intense El Niño (or La Niña) episodes in 2009 and 2015 (or 2010) observed in the ozone columns in the tropics will be discussed. We will also focus on O 3 trends over and downwind anthropogenic polluted areas characterized either by increased (e.g. over Asia) or decreased (e.g. over Europe and the US) O 3 precursor emissions. |
author2 |
Spectroscopie de l'atmosphère, Service de Chimie Quantique et Photophysique Université libre de Bruxelles (ULB) TROPO - 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) International Ozone Commission |
format |
Conference Object |
author |
Wespes, Catherine Hurtmans, Daniel Boynard, Anne Clerbaux, Cathy Coheur, Pierre-François |
author_facet |
Wespes, Catherine Hurtmans, Daniel Boynard, Anne Clerbaux, Cathy Coheur, Pierre-François |
author_sort |
Wespes, Catherine |
title |
O 3 variability in the troposphere from IASI observations in 2008-2015 |
title_short |
O 3 variability in the troposphere from IASI observations in 2008-2015 |
title_full |
O 3 variability in the troposphere from IASI observations in 2008-2015 |
title_fullStr |
O 3 variability in the troposphere from IASI observations in 2008-2015 |
title_full_unstemmed |
O 3 variability in the troposphere from IASI observations in 2008-2015 |
title_sort |
o 3 variability in the troposphere from iasi observations in 2008-2015 |
publisher |
HAL CCSD |
publishDate |
2016 |
url |
https://insu.hal.science/insu-01369317 |
op_coverage |
Edinburgh, United Kingdom |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
Quadrennial Ozone Symposium 2016 https://insu.hal.science/insu-01369317 Quadrennial Ozone Symposium 2016, International Ozone Commission, Sep 2016, Edinburgh, United Kingdom. pp.QOS2016-299 |
op_relation |
insu-01369317 https://insu.hal.science/insu-01369317 |
_version_ |
1772817478476365824 |