Reference : Analysis of trends in total stratospheric ozone
Scientific congresses and symposiums : Unpublished conference/Abstract
Physical, chemical, mathematical & earth Sciences : Earth sciences & physical geography
Analysis of trends in total stratospheric ozone
Salawitch, Ross J []
Tribett, W R []
Wales, P []
Hope, A P []
Mc Bride []
Canty, T P []
Frith, S M []
Mc Peters, R D []
Mahieu, Emmanuel mailto [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Groupe infra-rouge de phys. atmosph. et solaire (GIRPAS) >]
Prignon, Maxime mailto [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Groupe infra-rouge de phys. atmosph. et solaire (GIRPAS) >]
Oman, L []
Kinnison, D E []
Joeckel, P []
American Geophysical Union Fall Meeting 2018
10-14 December 2018
[en] stratospheric ozone ; trend ; Jungfraujoch
[en] Time series of total column ozone have exhibited unusual, unexpected behavior over the past few years. In year 2016, total ozone was lower than expected based on some forecasts that utilize the time evolution of equivalent effective stratosphere chlorine (EESC). Conversely, total column ozone exhibited a sharp rise in 2017. The existence of a new formulation (i.e., Engel et al., ACP, 2017) for the fractional release factors (FRFs) used to find EESC for mid-latitude lower stratospheric air parcels, the contribution of very short-lived chlorine and bromine compounds to EESC, as well as possible temporal variations in tropospheric column ozone compound the difficulty in establishing a quantitative relationship between the time evolution of EESC and stratospheric ozone. This presentation will consist of an analysis of the ~40 year record of total column ozone measured from space (e.g., version 8.6 of the NASA SBUV Merged Ozone Data Set at the time of abstract submission), along with:
a) stratospheric chlorine loading from various satellite instruments as well as the long-term ground-based measurement from Jungfraujoch, Switzerland;
b) various other quantities that affect the long-term evolution of stratospheric ozone (e.g., total solar irradiance, stratospheric optical depth, quasi-biennial oscillation of the direction of tropical stratospheric winds)
c) estimates of tropospheric column ozone
to assess our understanding of trends in total stratospheric ozone. Preliminary results indicate better quantitative understanding is attained for the new FRFs, which lead to a more gradual recovery of total stratospheric ozone than is found using the old FRFs.
Reference: Engel, A. et al., ACP, 18, 601619, doi:10.5194/acp-18-601-2018, 2018.

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