Intraseasonal variations of the tropical total ozone and their connection to the Madden‐Julian Oscillation

Tian, Baijun; Yung, Yuk L.; Waliser, Duane E.; Tyranowski, T.; Kuai, Le; Fetzer, Eric J.; Irion, F. W.

doi:10.1029/2007gl029451

Cited by 70 publications

(87 citation statements)

References 32 publications

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“…TES measurements show that at most 27 % of the total O 3 column anomalies are contributed by the tropospheric components. This indicates that the subtropical total column O 3 anomalies are mostly from the O 3 anomalies in the lower stratosphere, which supports the hypothesis of Tian et al (2007). The strong connection between the intraseasonal subtropical stratospheric O 3 variations and the MJO implies that the stratospheric O 3 variations may be predictable with similar lead times over the subtropics.…”

supporting

confidence: 73%

“…Tian et al (2007) found that the MJO-related total column ozone (O 3 ) anomalies of 10 DU (peak-to-trough) are mainly evident over the subtropics and dynamically driven by the vertical movement of the subtropical tropopause layer. It was then hypothesized that the subtropical total column O 3 anomalies are primarily associated with the O 3 variability in the stratosphere rather the troposphere.…”

mentioning

confidence: 99%

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Vertical structure of MJO-related subtropical ozone variations from MLS, TES, and SHADOZ data

Tian

Waliser

et al. 2012

Atmos. Chem. Phys.

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Abstract. Tian et al. (2007) found that the MJO-related total column ozone (O 3 ) anomalies of 10 DU (peak-to-trough) are mainly evident over the subtropics and dynamically driven by the vertical movement of the subtropical tropopause layer. It was then hypothesized that the subtropical total column O 3 anomalies are primarily associated with the O 3 variability in the stratosphere rather the troposphere. In this paper, we investigate the vertical structure of MJO-related subtropical O 3 variations using the vertical O 3 profiles from the Aura Microwave Limb Sounder (MLS) and Tropospheric Emission Spectrometer (TES), as well as in-situ measurements by the Southern Hemisphere Additional Ozonesondes (SHADOZ) project. Our analysis indicates that the subtropical O 3 anomalies maximize approximately in the lower stratosphere (60-100 hPa). Furthermore, the spatialtemporal patterns of the subtropical O 3 anomalies in the lower stratosphere are very similar to that of the total column. In particular, they are both dynamically driven by the vertical movement of subtropical tropopause. The subtropical partial O 3 column anomalies between 30-200 hPa accounts for more than 50 % of the total O 3 column anomalies. TES measurements show that at most 27 % of the total O 3 column anomalies are contributed by the tropospheric components. This indicates that the subtropical total column O 3 anomalies are mostly from the O 3 anomalies in the lower stratosphere, which supports the hypothesis of Tian et al. (2007). The strong connection between the intraseasonal subtropical stratospheric O 3 variations and the MJO implies that the stratospheric O 3 variations may be predictable with similar lead times over the subtropics. Future work could involve a similar study or an O 3 budget analysis using a sophisticated chemical transport model in the near-equatorial regions where the observed MJO signals of total column O 3 are weak.

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supporting

confidence: 73%

mentioning

confidence: 99%

Vertical structure of MJO-related subtropical ozone variations from MLS, TES, and SHADOZ data

Tian

Waliser

et al. 2012

Atmos. Chem. Phys.

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“…TOC variations can also be caused by changes in the surface climate ). Other studies have reported the effects of internal climate variability on ozone, including phenomena such as the Madden-Julian oscillation (e.g., Fujiwara et al 1998;Tian et al 2007; C. Weare 2010;Li et al 2012;Y. Zhang et al 2015), El Niño-Southern Oscillation (ENSO) (e.g., Ziemke and Chandra 1999;Cagnazzo et al 2009;Randel et al 2009;Xie et al 2014a,b;J.…”

Section: Introductionmentioning

confidence: 99%

Influence of the Arctic Oscillation on the Vertical Distribution of Wintertime Ozone in the Stratosphere and Upper Troposphere over the Northern Hemisphere

et al. 2017

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The influence of the Arctic Oscillation (AO) on the vertical distribution of stratospheric ozone in the Northern Hemisphere in winter is analyzed using observations and an offline chemical transport model. Positive ozone anomalies are found at low latitudes (08-308N) and there are three negative anomaly centers in the northern midand high latitudes during positive AO phases. The negative anomalies are located in the Arctic middle stratosphere (;30 hPa; 708-908N), Arctic upper troposphere-lower stratosphere (UTLS; 150-300 hPa, 708-908N), and midlatitude UTLS (70-300 hPa, 308-608N). Further analysis shows that anomalous dynamical transport related to AO variability primarily controls these ozone changes. During positive AO events, positive ozone anomalies between 08 and 308N at 50-150 hPa are related to the weakened meridional transport of the Brewer-Dobson circulation (BDC) and enhanced eddy transport. The negative ozone anomalies in the Arctic middle stratosphere are also caused by the weakened BDC, while the negative ozone anomalies in the Arctic UTLS are caused by the increased tropopause height, weakened BDC vertical transport, weaker exchange between the midlatitudes and the Arctic, and enhanced ozone depletion via heterogeneous chemistry. The negative ozone anomalies in the midlatitude UTLS are mainly due to enhanced eddy transport from the midlatitudes to the latitudes equatorward of 308N, while the transport of ozone-poor air from the Arctic to the midlatitudes makes a minor contribution. Interpreting AO-related variability of stratospheric ozone, especially in the UTLS, would be helpful for the prediction of tropospheric ozone variability caused by the AO.

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“…The influence of ENSO on total column ozone can be explained by the variation in the tropopause height driven by changes of tropical deep convection and the changes of the BrewerDobson circulation (Schubert and Munteanu 1988;Shiotani 1992;Hasebe 1993;Garcia-Herrera et al 2006;Free and Seidel 2009). Such a causal relationship between total column ozone and the tropopause height is also evident in the Madden-Julian oscillation (Tian et al 2007). However, a quantitative demonstration of the impact of ENSO on total column ozone and tropopause height has not been carried out using model simulations to date.…”

Section: Introductionmentioning

confidence: 96%

El Niño-Southern Oscillation in Tropical and Mid-Latitude Column Ozone

Wang¹,

Pawson²,

Tian³

et al. 2011

J. Atmos. Sci.

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The impacts of El Niñ o-Southern Oscillation (ENSO) on the tropical total column ozone, the tropical tropopause pressure, and the 3.5-yr ozone signal in the midlatitude total column ozone were examined using the Goddard Earth Observing System Chemistry-Climate Model (GEOS CCM). Observed monthly mean sea surface temperature and sea ice between 1951 and 2004 were used as boundary conditions for the model. Since the model includes no solar cycle, quasi-biennial oscillation, or volcanic forcing, the ENSO signal was found to dominate the tropical total column ozone variability. Principal component analysis was applied to the detrended, deseasonalized, and low-pass filtered model outputs. The first mode of model total column ozone captured 63.8% of the total variance. The spatial pattern of this mode was similar to that in Total Ozone Mapping Spectrometer (TOMS) observations. There was also a clear ENSO signal in the tropical tropopause pressure in the GEOS CCM, which is related to the ENSO signal in the total column ozone. The regression coefficient between the model total column ozone and the model tropopause pressure was 0.71 Dobson units (DU) hPa 21 . The GEOS CCM was also used to investigate a possible mechanism for the 3.5-yr signal observed in the midlatitude total column ozone. The 3.5-yr signal in the GEOS CCM column ozone is similar to that in the observations, which suggests that a model with realistic ENSO can reproduce the 3.5-yr signal. Hence, it is likely that the 3.5-yr signal was caused by ENSO.

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Intraseasonal variations of the tropical total ozone and their connection to the Madden‐Julian Oscillation

Cited by 70 publications

References 32 publications

Vertical structure of MJO-related subtropical ozone variations from MLS, TES, and SHADOZ data

Vertical structure of MJO-related subtropical ozone variations from MLS, TES, and SHADOZ data

Influence of the Arctic Oscillation on the Vertical Distribution of Wintertime Ozone in the Stratosphere and Upper Troposphere over the Northern Hemisphere

El Niño-Southern Oscillation in Tropical and Mid-Latitude Column Ozone

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