Modeled Arctic ozone depletion in winter 1997/1998 and comparison with previous winters

Guirlet, M.; Chipperfield, Martyn P.; Pyle, J. A.; Goutail, Florence; Pommereau, J. P.; Kyrö, E.

doi:10.1029/2000jd900121

Cited by 34 publications

(40 citation statements)

References 41 publications

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“…Some of these also appear to overestimate the chemical loss during warm winters (e.g. Guirlet et al, 2000). Previous studies also indicate that current CTMs cannot give a satisfactory observed partial column ozone loss (e.g.…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional model study of the Arctic ozone loss in 2002/2003 and comparison with 1999/2000 and 2003/2004

et al. 2005

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The updated CTM uses σ -θ as a vertical coordinate which allows it to extend down to the surface. The CTM has a detailed stratospheric chemistry scheme and now includes a simple NAT-based denitrification scheme in the stratosphere.In the model runs presented here the model was forced by ECMWF ERA40 and operational analyses. The model used 24 levels extending from the surface to ∼55 km and a horizontal resolution of either 7.5 • ×7.5 • or 2.8 • ×2.8 • . Two different radiation schemes, MIDRAD and the CCM scheme, were used to diagnose the vertical motion in the stratosphere. Based on tracer observations from balloons and aircraft, the more sophisticated CCM scheme gives a better representation of the vertical transport in this model which includes the troposphere. The higher resolution model generally produces larger chemical O 3 depletion, which agrees better with observations.The CTM results show that very early chemical ozone loss

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Section: Introductionmentioning

confidence: 99%

Three-dimensional model study of the Arctic ozone loss in 2002/2003 and comparison with 1999/2000 and 2003/2004

et al. 2005

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“…However, the effects of some specific reactions remain unclear and need to be further investigated as polar ozone losses determined with different climate-chemistry models show significant differences as discussed in Chapter 6 of SPARC CCMVal (2010) and references therein. Several studies quantified the chemical ozone loss in the Arctic polar vortex using a variety of techniques and instruments (e.g., Chipperfield et al, 1996;Goutail et al, 1997;Deniel et al, 1998;Rex et al, 1999;Becker et al, 2000;Guirlet et al, 2000;Eichmann et al, 2002;Grooß and Müller, 2003;Goutail et al, 2005;El Amraoui et al, 2008). The methods employed to quantify the chemical ozone loss include, e.g., (1) the match technique (e.g.…”

Section: Introductionmentioning

confidence: 99%

Chemical ozone losses in Arctic and Antarctic polar winter/spring season derived from SCIAMACHY limb measurements 2002–2009

et al. 2013

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Abstract. Stratospheric ozone profiles are retrieved for the period 2002–2009 from SCIAMACHY measurements of limb-scattered solar radiation in the Hartley and Chappuis absorption bands of ozone. This data set is used to determine the chemical ozone losses in both the Arctic and Antarctic polar vortices by averaging the ozone in the vortex at a given potential temperature. The chemical ozone losses at isentropic levels between 450 K and 600 K are derived from the difference between observed ozone abundances and the ozone modelled taking diabatic cooling into account, but no chemical ozone loss. Chemical ozone losses of up to 30–40% between mid-January and the end of March inside the Arctic polar vortex are reported. Strong inter-annual variability of the Arctic ozone loss is observed, with the cold winters 2004/2005 and 2006/2007 showing chemical ozone losses inside the polar vortex at 475 K, where 1.7 ppmv and 1.4 ppmv of ozone were removed, respectively, over the period from 22 January to beginning of April and 0.9 ppmv and 1.2 ppmv, respectively, during February. For the winters of 2007/2008 and 2002/2003, ozone losses of about 0.8 ppmv and 0.4 ppmv, respectively are estimated at the 475 K isentropic level for the period from 22 January to beginning of April. Essentially no ozone losses were diagnosed for the relatively warm winters of 2003/2004 and 2005/2006. The maximum ozone loss in the SCIAMACHY data set was found in 2007 at the 600 K level and amounted to about 2.1 ppmv for the period between 22 January and the end of April. Enhanced losses close to this altitude were found in all investigated Arctic springs, in contrast to Antarctic spring. The inter-annual variability of ozone losses and PSC occurrence rates observed during Arctic spring is consistent with the known QBO effects on the Arctic polar vortex, with exception of the unusual Arctic winter 2008/2009. The maximum total ozone mass loss of about 25 million tons was found in the cold Arctic winter of 2004/2005 inside the polar vortex between the 450 K and 600 K isentropic levels from mid-January until the middle of March. The Antarctic vortex averaged ozone loss as well as the size of the polar vortex do not vary much from year to year. The total ozone mass loss inside the Antarctic polar vortex between the 450 K and 600 K isentropic levels is about 50–60 million tons and the vortex volume for this altitude range varies between about 150 and 300 km3 for the period between mid-August and mid-November of every year studied, except for 2002. In 2002 a mid-winter major stratospheric warming occurred in the second half of September and the ozone mass loss was only about half of the value in the other years. However, inside the polar vortex we find chemical ozone losses at the 475 K isentropic level that are similar to those in all other years studied. At this isentropic level ozone losses of 70–90% between mid-August and mid-November or about 2.5 ppmv are observed every year. At isentropic levels above 500 K the chemical ozone losses were found to be larger in 2002 than in all other years studied. Comparisons of the vertical variation of ozone losses derived from SCIAMACHY observations with several independent techniques for the Arctic winter 2004/2005 show that the SCIAMACHY results fall in the middle of the range of previously published results for this winter. For other winters in both hemispheres – for which comparisons with other studies were possible – the SCIAMACHY results are consistent with the range of previously published results.

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“…In spite of attention placed on ozone loss in the polar regions, numerous theoretical models routinely underestimate ozone loss rates in much of the lower polar stratosphere (between about 400 and 550 K) compared to "observed" loss rates (e.g., Chipperfield et al, 1996;Goutail et al, 1997;Deniel et al, 1998;Becker et al, 2000;Guirlet et al, 2000). Even with the most recent Arctic field campaign results (e.g., SOLVE I/II, the SAGE III Ozone Loss and Validation Experiment; THESEO-2000, the Third European Stratospheric Experiment on Ozone; and VINTERSOL, Validation of International Satellites and Ozone Loss) this long-standing problem has yet to be resolved (e.g., Pierce et al, 2003).…”

Section: Introduction and Objectivesmentioning

confidence: 99%

“…As mentioned by Guirlet et al (2000) and Harris et al (2002), quantitative comparisons of the different ozone loss calculations can be difficult since each method considers different altitudes, time periods, and area averages of the vortex. When comparing ozone loss results it is critical to understand these differences as well as the weaknesses of each method.…”

Section: Introduction and Objectivesmentioning

confidence: 99%

2002-2003 Arctic ozone loss deduced from POAM III satellite observations and the SLIMCAT chemical transport model

et al. 2005

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Abstract. The SLIMCAT three-dimensional chemical transport model (CTM) is used to infer chemical ozone loss from Polar Ozone and Aerosol Measurement (POAM) III observations of stratospheric ozone during the Arctic winter of [2002][2003]. Inferring chemical ozone loss from satellite data requires quantifying ozone variations due to dynamical processes. To accomplish this, the SLIMCAT model was run in a "passive" mode from early December until the middle of March. In these runs, ozone is treated as an inert, dynamical tracer. Chemical ozone loss is inferred by subtracting the model passive ozone, evaluated at the time and location of the POAM observations, from the POAM measurements themselves. This "CTM Passive Subtraction" technique relies on accurate initialization of the CTM and a realistic description of vertical/horizontal transport, both of which are explored in this work. The analysis suggests that chemical ozone loss during the 2002-2003 winter began in late December. This loss followed a prolonged period in which many polar stratospheric clouds were detected, and during which vortex air had been transported to sunlit latitudes. A series of stratospheric warming events starting in January hindered chemical ozone loss later in the winter of 2003. Nevertheless, by 15 March, the final date of the analysis, ozone loss maximized at 425 K at a value of about 1.2 ppmv, a moderate amount of loss compared to loss during the unusually cold winters in the late-1990s. SLIMCAT was also run with a detailed stratospheric chemistry scheme to obtain the modelpredicted loss. The SLIMCAT model simulation also showsCorrespondence to: C. S. Singleton (shaw@lasp.colorado.edu) a maximum ozone loss of 1.2 ppmv at 425 K, and the morphology of the loss calculated by SLIMCAT was similar to that inferred from the POAM data. These results from the recently updated version of SLIMCAT therefore give a much better quantitative description of polar chemical ozone loss than older versions of the same model. Both the inferred and modeled loss calculations show the early destruction in late December and the region of maximum loss descending in altitude through the remainder of the winter and early spring.

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Modeled Arctic ozone depletion in winter 1997/1998 and comparison with previous winters

Cited by 34 publications

References 41 publications

Three-dimensional model study of the Arctic ozone loss in 2002/2003 and comparison with 1999/2000 and 2003/2004

Three-dimensional model study of the Arctic ozone loss in 2002/2003 and comparison with 1999/2000 and 2003/2004

Chemical ozone losses in Arctic and Antarctic polar winter/spring season derived from SCIAMACHY limb measurements 2002–2009

2002-2003 Arctic ozone loss deduced from POAM III satellite observations and the SLIMCAT chemical transport model

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