Interannual Variations of Total Ozone at Northern Midlatitudes Correlated with Stratospheric EP Flux and Potential Vorticity

Hood, L. L.; Soukharev, B. E.

doi:10.1175/jas3559.1

Cited by 66 publications

(82 citation statements)

References 78 publications

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“…3a), TCO decreases at different rates in different regions, although the TCO over the whole middle latitudes show negative trends, as reported by previous studies (e.g. Callis et al 1997;Hadjinicolaou et al 2005;Hood and Soukharev 2005). The maximum negative TCO trend occurs over East Asia and the TCO decline over northwestern North America is weak, as is more evident in the linear trends of the zonal TCO anomalies (Fig.…”

Section: Zonally Asymmetric Ozone Trend and Its Influencing Factorssupporting

confidence: 82%

“…However, some studies have shown that stratospheric ozone concentrations over different regions along the same latitude exhibit different recovery rates. Over some regions, TCO even continues to decrease due to changes in local dynamical and chemical processes (Hood and Soukharev 2005;Zhang et al 2014Zhang et al , 2018Wargan et al 2018), suggesting that long-term ozone variations are highly longitude-dependent. Previous studies pointed out that the trends in the deviation of ozone from the zonal mean over some regions can reach and even exceed the zonal mean ozone trend at that latitude, particularly at 1 3 northern middle latitudes (e.g.…”

Section: Introductionmentioning

confidence: 99%

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Zonally asymmetric trends of winter total column ozone in the northern middle latitudes

et al. 2018

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Using various satellite-based observations, a linear ozone transport model (LOTM), a chemistry-climate model (WACCM3) and an offline chemical transport model (SLIMCAT), zonally asymmetric trends of the total column ozone (TCO) in the northern middle latitudes during winter for the period 1979-2015 are analyzed and factors responsible for the trends are diagnosed. The results reveal that there are significant negative TCO trends over the North Pacific and positive TCO trends over the northwestern North America. The zonally asymmetric TCO trends are mainly contributed by the trends in partial column ozone in the upper troposphere and lower stratosphere (UTLS) which are closely related to the long-term changes of geopotential height in the troposphere. Furthermore, the trends of geopontential height in the UTLS are mainly modulated by pattern changes in the Arctic Oscillation (AO), the Cold Ocean-Warm Land (COWL) and the North Pacific (NP) index. Accordingly, the zonally asymmetric TCO trends can be largely reconstructed by the trends of the above three teleconnection patterns. Sea surface temperature (SST) changes over the Pacific Ocean and the Atlantic Ocean can also exert a significant contribution to the zonally asymmetric TCO trends through their influence on the COWL and NP patterns. In addition, chemical ozone loss partially offsets the positive trends in zonal TCO anomalies over Central Siberia and enhances the positive TCO trends over northwestern North America. However, the contribution of chemical processes to the zonally asymmetric TCO trends is relatively smaller than that of dynamical transport effects. Interpreting the zonally asymmetric TCO trends and their responsible factors would be helpful for accurately predicting the stratospheric ozone return date in the northern middle latitudes.

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Section: Zonally Asymmetric Ozone Trend and Its Influencing Factorssupporting

confidence: 82%

Section: Introductionmentioning

confidence: 99%

Zonally asymmetric trends of winter total column ozone in the northern middle latitudes

et al. 2018

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“…A significant increase of total ozone during ENSO-III (1997-1998) was accompanied by decreased precipitation, producing extensive forest fires in Indonesia, Australia, and South America (46,47). The influence of ENSOs on total columnar ozone has been attributed to the variation in the tropopause height driven by changes of tropical deep convection and alteration of Brewer-Dobson circulation (14,48). These observations suggest that the Δ 17 O of sulfate aerosols can be used to track moderate to strong ENSO events and the variation in ozone concentration.…”

Section: Discussionmentioning

confidence: 99%

“…The observed dataset reflects the range of processes contributing to the observed oxygen isotopic composition of sulfate. during ENSO periods (14,48). Cumulatively, all components needed to provide ENSO-related Δ 17 O enrichments are present.…”

Section: Discussionmentioning

confidence: 99%

Tales of volcanoes and El-Niño southern oscillations with the oxygen isotope anomaly of sulfate aerosol

Shaheen

Abauanza

Jackson

et al. 2013

Proc. Natl. Acad. Sci. U.S.A.

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The ability of sulfate aerosols to reflect solar radiation and simultaneously act as cloud condensation nuclei renders them central players in the global climate system. The oxidation of S(IV) compounds and their transport as stable S(VI) in the Earth's system are intricately linked to planetary scale processes, and precise characterization of the overall process requires a detailed understanding of the linkage between climate dynamics and the chemistry leading to the product sulfate. This paper reports a high-resolution, 22-y (1980-2002) record of the oxygen-triple isotopic composition of sulfate (SO 4 ) aerosols retrieved from a snow pit at the South Pole. Observed variation in the O-isotopic anomaly of SO 4 aerosol is linked to the ozone variation in the tropical upper troposphere/ lower stratosphere via the Ozone El-Niño Southern Oscillations (ENSO) Index (OEI). Higher Δ 17 O values (3.3‰, 4.5‰, and 4.2‰) were observed during the three largest ENSO events of the past 2 decades. Volcanic events inject significant quantities of SO 4 aerosol into the stratosphere, which are known to affect ENSO strength by modulating stratospheric ozone levels (OEI = 6 and Δ 17 O = 3.3‰, OEI = 11 and Δ 17 O = 4.5‰) and normal oxidative pathways. Our high-resolution data indicated that Δ 17 O of sulfate aerosols can record extreme phases of naturally occurring climate cycles, such as ENSOs, which couple variations in the ozone levels in the atmosphere and the hydrosphere via temperature driven changes in relative humidity levels. A longer term, higher resolution oxygen-triple isotope analysis of sulfate aerosols from ice cores, encompassing more ENSO periods, is required to reconstruct paleo-ENSO events and paleotropical ozone variations.

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“…The latter dynamical processes include a) the indirect effect of mixing of chemically ozone-depleted Arctic and Antarctic air to lower latitudes (e.g., Chipperfield 1999), and b) the direct effect of long-term (e.g., climate-related) changes in stratospheric circulation on the ozone column without changes in chemical losses (e.g., Fusco and Salby 1999;Hood and Soukharev 2005). In the chapter summary, it is stated: "While some studies suggest a role for a purely dynamical trend in midlatitude ozone depletion, these have not yet succeeded in quantifying a significant independent contribution."…”

Section: Aeronomy Of the Middle Atmosphere: Chemistry And Physics Of mentioning

confidence: 99%

Readings

2007

Bulletin of the American Meteorological Society

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TUBE WEATHER STOR^ ometimes bad things happen to good books. \ Sometimes an otherwise engaging, intelligent, and cleverly organized book is done a remarkable disservice by its editors. Sometimes a reader wonders if there ever were editors in the first place.The problems (which I'll discuss later) are not to be blamed on the author-or if he is due any blame, it is only insofar as he had a hand in cracking the whip over the editors in question. Climatologist Randy Cerveny has come up with what ought to be a foolproof approach to the presentation of weird weather lore. Cerveny begins with a bit of history, as well as a review of the book's compilers of anecdotes, and explains the book's amusing title: "Many of [nature's] oddities-at least with regard to weather-have been nicknamed in past newspapers, science journals, books, and weather records, the 'freaks of the storm.'" He goes on to introduce the reader to the term "fortean," a tribute to early-twentieth century researcher Charles Fort, who archived and wrote about exotic weather phenomena, such as "rainstorms" of frogs and fish.In the first chapter, Cerveny explains the assembly of data (over 500 stories from his archive of 8,000 anecdotes) he uses throughout the book: Each subsequent chapter focuses on a particular weather oddity. Within each chapter are 12 sections in which the most bizarre chronicles are presented, analyzed, and sometimes even explained away or dismissed in meteorological and scientific terms. A 13th section of each chapter then offers safety recommendations relevant to that particular weather extreme. The last chapter presents an alphabetical state-by-state examination of weather "freaks."The book's style is sharp and entertaining. Chapter 1 begins, "On a foggy October morning in 1947 ..." and ends with a droll imitation of the ringmaster's call, "Boys, girls, ladies, and gents, step right up!"Freaks continues with a piecey, cobbled narrative structure that is often fascinating, sometimes altogether fantastic to read. The absence of tidy conclusions or denouements is refreshing, and the whimsical episodic form promises instant gratification for those who tend not to embrace a cover-to-cover reading style. Moreover, Cerveny's liberal use of quotes prevents Freaks from reading like a textbook, and adroitly washes many of the anecdotes in a quirky, tongue-in-cheek light, worthy of the book's fanciful cover art depicting the tail end of an airborne cow.Impatient and dyed-in-the-wool scientists should be forewarned: Freaks is written for a general audience, and takes the time to explain, for example, how a tornado forms. Still, the meat of the book is enough to keep hard-core meteorologists and the simply curious absorbed and amused. In addition to anecdotes describing the extreme (a 1.23-inch rainfall in one minute), macabre (blood rains, worm-infested snowfalls), or bizarre (chickenplucking tornadoes), Cerveny's stories are often simply entertaining. One tale of three blushing ingenues' wind-ripped clothing is comically salacious. Another des...

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Interannual Variations of Total Ozone at Northern Midlatitudes Correlated with Stratospheric EP Flux and Potential Vorticity

Cited by 66 publications

References 78 publications

Zonally asymmetric trends of winter total column ozone in the northern middle latitudes

Zonally asymmetric trends of winter total column ozone in the northern middle latitudes

Tales of volcanoes and El-Niño southern oscillations with the oxygen isotope anomaly of sulfate aerosol

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