POAM II ozone observations in the Antarctic ozone hole in 1994, 1995, and 1996

Bevilacqua, R. M.; Aellig, C. P.; Debrestian, D.; Fromm, M.; Hoppel, K. W.; Lumpe, J. D.; Shettle, E. P.; Hornstein, J.; Randall, C. E.; Rusch, D. W.; Rosenfield, Joan E.

doi:10.1029/97jd01623

Cited by 38 publications

(39 citation statements)

References 38 publications

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“…First, horizontal mixing of midlatitude ozone-rich air, from which the vortex air is isolated, leads to accumulation of ozone outside the vortex . Second, diabatic descent of vortex air above the ozone mixing ratio peak, reduces ozone levels at those altitudes (Bevilacqua et al, 1997). In contrast, the results for 550 K showed that a significant number of air parcels originated between 500 and 600 K, in the region of the ozone hole, where they underwent chemical depletion.…”

Section: Analysis and Resultscontrasting

confidence: 47%

Antarctic air over New Zealand following vortex breakdown in 1998

et al. 2003

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Abstract. An ozonesonde profile over the Network for Detection of Stratospheric Change (NDSC) site at Lauder (45.0 • S, 169.7 • E), New Zealand, for 24 December 1998 showed atypically low ozone centered around 24 km altitude (600 K potential temperature). The origin of the anomaly is explained using reverse domain filling (RDF) calculations combined with a PV/O 3 fitting technique applied to ozone measurements from the Polar Ozone and Aerosol Measurement (POAM) III instrument. The RDF calculations for two isentropic surfaces, 550 and 600 K, show that ozone-poor air from the Antarctic polar vortex reached New Zealand on 24-26 December 1998. The vortex air on the 550 K isentrope originated in the ozone hole region, unlike the air on 600 K where low ozone values were caused by dynamical effects. High-resolution ozone maps were generated, and their examination shows that a vortex remnant situated above New Zealand was the cause of the altered ozone profile on 24 December. The maps also illustrate mixing of the vortex filaments into southern midlatitudes, whereby the overall midlatitude ozone levels were decreased.

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Section: Analysis and Resultscontrasting

confidence: 47%

Antarctic air over New Zealand following vortex breakdown in 1998

et al. 2003

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“…In general, as found in previous studies the Antarctic ozone depletion starts in early-July and stops during the last week of September (Solomon et al, 2005;Tilmes et al, 2006;Huck et al, 2007) except in 2006 when it extended until the first week of October. In all years the ozone hole could be followed until the 3 rd and 4 th week of November (Bevilacqua et al, 1997;Solomon et al, 2005). As expected from their similar temperatures, the cold winters 2006, 2008 and 2009 show little difference in ozone loss.…”

Section: Antarctic Ozone Lossmentioning

confidence: 69%

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

et al. 2010

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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%

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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POAM II ozone observations in the Antarctic ozone hole in 1994, 1995, and 1996

Cited by 38 publications

References 38 publications

Antarctic air over New Zealand following vortex breakdown in 1998

Antarctic air over New Zealand following vortex breakdown in 1998

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

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

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