Reduced ozone loss at the upper edge of the Antarctic Ozone Hole during 2001–2004

Hoppel, K. W.; Nedoluha, Gerald E.; Fromm, M.; Allen, Douglas R.; Bevilacqua, R. M.; Alfred, Jerome; Johnson, B. J.; König-Langlo, Gert

doi:10.1029/2005gl023968

Cited by 19 publications

(32 citation statements)

References 23 publications

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“…For instance, the partial column loss estimated at 350-600 K from Improved Limb Atmospheric Spectrometer (ILAS) measurements by applying the tracer correlation approach was 157±17 DU in early-October 2003 (Tilmes et al, 2006), which is close to our evaluation for the recent winters during the same period. Our conclusion on the interannual variability of ozone loss is also in line with the previous studies (Hofmann et al, 1997;Wu and Dessler, 2001;Bevilacqua et al, 1997;Solomon et al, 2005;Hoppel et al, 2005;Lemmen et al, 2006;Huck et al, 2007). The studies based on ozonesonde observations (for e.g.…”

Section: Antarctic Ozone Losssupporting

confidence: 81%

Estimation of Antarctic ozone loss from ground-based total column measurements

et al. 2010

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Section: Antarctic Ozone Losssupporting

confidence: 81%

Estimation of Antarctic ozone loss from ground-based total column measurements

et al. 2010

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“…This is slightly different from the Arctic, where significant ozone loss occurs mostly in the lower stratosphere over 350-550 K in colder winters and where the depletion above 550 K is limited to ∼ 19 ± 7 DU . The larger Antarctic ozone column loss contribution from higher altitudes (above 550 K) is consistent with the loss estimated above these altitudes, as shown by the ozone profiles in this study for and in Lemmen et al (2006 and Hoppel et al (2005) for a range of Antarctic winters prior to 2004. It is also evident from the maximum ozone loss altitudes, as most Antarctic winters have their peak loss altitudes around 525 K as opposed to 475 K in the Arctic (e.g., Kuttippurath et al, 2012;Tripathi et al, 2007;Grooß et al, 2005a;Rex et al, 2004).…”

Section: Partial Column Ozone Losssupporting

confidence: 73%

“…Therefore, for the first time ozone loss and chlorine activation can be studied with high-resolution measurements that have very good spatial and temporal coverage inside the Antarctic vortex. Previous satellite measurements were relatively limited to a small temporal and spatial area as far as high-latitude observations are concerned (e.g., Tilmes et al, 2006;Hoppel et al, 2005). While the Upper Atmosphere Research Satellite MLS (Waters et al, 1999) had a similar latitudinal coverage, the frequency of its polar measurements was lower than that of Aura MLS (e.g., Livesey et al, 2013;Froidevaux et al, 2008).…”

mentioning

confidence: 94%

Variability in Antarctic ozone loss in the last decade (2004–2013): high-resolution simulations compared to Aura MLS observations

Kuttippurath

Godin‐Beekmann²,

Lefèvre³

et al. 2015

Atmos. Chem. Phys.

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Abstract.A detailed analysis of the polar ozone loss processes during 10 recent Antarctic winters is presented with high-resolution MIMOSA-CHIM (Modèle Isentrope du transport Méso-échelle de l'Ozone Stratosphérique par Advection avec CHIMie) model simulations and high-frequency polar vortex observations from the Aura microwave limb sounder (MLS) instrument. The high-frequency measurements and simulations help to characterize the winters and assist the interpretation of interannual variability better than either data or simulations alone. Our model results for the Antarctic winters of [2004][2005][2006][2007][2008][2009][2010][2011][2012][2013] show that chemical ozone loss starts in the edge region of the vortex at equivalent latitudes (EqLs) of 65-67 • S in mid-June-July. The loss progresses with time at higher EqLs and intensifies during August-September over the range 400-600 K. The loss peaks in late September-early October, when all EqLs (65-83 • S) show a similar loss and the maximum loss (> 2 ppmv -parts per million by volume) is found over a broad vertical range of 475-550 K. In the lower stratosphere, most winters show similar ozone loss and production rates. In general, at 500 K, the loss rates are about 2-3 ppbv sh −1 (parts per billion by volume per sunlit hour) in July and 4-5 ppbv sh −1 in August-mid-September, while they drop rapidly to 0 by midOctober. In the middle stratosphere, the loss rates are about 3-5 ppbv sh −1 in July-August and October at 675 K. , and 2011 were moderately cold, and thus both ozone loss and peak loss altitudes are between these two ranges (3 ppmv around 500 K or 150 ± 10 DU). The modeled ozone loss values are in reasonably good agreement with those estimated from Aura MLS measurements, but the model underestimates the observed ClO, largely due to the slower vertical descent in the model during spring.

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“…Austin et al, 2010). Although there are many studies using satellite data, a continuous long-term ozone loss analysis is still not available using these data (Bevilacqua et al, 1997;Hoppel et al, 2005;Tilmes et al, 2006). Therefore, we present a comprehensive ozone loss analysis in the Antarctic using ground-based and satellite measurements for the 1989-2010 period, similar to that in the Arctic (Goutail et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

“…However, most of them deal with the ozone loss analysis for individual winters, modelled or incomplete due to limitations of the analysed observations (e.g. Austin et al, 2010;Lemmen et al, 2006;Tilmes et al, 2006;Hoppel et al, 2005), and thus this makes the inter-annual comparison very difficult. For instance, the chemistry-climate model (CCM)-based studies are mostly exploited for the projection of ozone recovery (e.g.…”

Section: Introductionmentioning

confidence: 99%

Antarctic ozone loss in 1979–2010: first sign of ozone recovery

et al. 2013

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Abstract. A long-term ozone loss time series is necessary to understand the evolution of ozone in Antarctica. Therefore, we construct the time series using ground-based, satellite and bias-corrected multi-sensor reanalysis (MSR) data sets for the period 1989–2010. The trends in ozone over 1979–2010 are also estimated to further elucidate its evolution in the wake of decreasing halogen levels in the stratosphere. Our analysis with ground-based observations shows that the average ozone loss in the Antarctic is about −33 to −50% (−90 to −155 DU (Dobson Unit)) in 1989–1992, and then stayed at around −48% (−160 DU). The ozone loss in the warmer winters (e.g. 2002 and 2004) is lower (−37 to −46%), and in the very cold winters (e.g. 2003 and 2006) it is higher (−52 to −55%). These loss estimates are in good agreement with those estimated from satellite observations, where the differences are less than ±3%. The ozone trends based on the equivalent effective Antarctic stratospheric chlorine (EEASC) and piecewise linear trend (PWLT) functions for the vortex averaged ground-based, Total Ozone Mapping Spectrometer/Ozone Monitoring Instrument (TOMS/OMI), and MSR data averaged over September–November exhibit about −4.6 DU yr−1 over 1979–1999, corroborating the role of halogens in the ozone decrease during the period. The ozone trends computed for the 2000–2010 period are about +1 DU yr−1 for EEASC and +2.6 DU yr−1 for the PWLT functions. The larger positive PWLT trends for the 2000–2010 period indicate the influence of dynamics and other basis functions on the increase of ozone. The trends in both periods are significant at 95% confidence intervals for all analyses. Therefore, our study suggests that Antarctic ozone shows a significant positive trend toward its recovery, and hence, leaves a clear signature of the successful implementation of the Montreal Protocol.

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Reduced ozone loss at the upper edge of the Antarctic Ozone Hole during 2001–2004

Abstract: [1] The top edge (20 -22 km) of the Antarctic ozone hole has been identified as a good place to detect ozone recovery (D.

Cited by 19 publications

References 23 publications

Estimation of Antarctic ozone loss from ground-based total column measurements

Estimation of Antarctic ozone loss from ground-based total column measurements

Variability in Antarctic ozone loss in the last decade (2004–2013): high-resolution simulations compared to Aura MLS observations

Antarctic ozone loss in 1979–2010: first sign of ozone recovery

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