The influence of the North Atlantic Oscillation and El Niño–Southern Oscillation on mean and extreme values of column ozone over the United States
Continuous measurements of total ozone (by Dobson spectrophotometers) across the contiguous United States began in the early 1960s. Here, we analyze temporal and spatial variability and trends in total ozone from the five US sites with long-term records. While similar long-term ozone changes are det...
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ftdatacite:10.7916/d8833rfm 2023-05-15T17:31:39+02:00 The influence of the North Atlantic Oscillation and El Niño–Southern Oscillation on mean and extreme values of column ozone over the United States Petropavlovskikh, I. Evans, R. McConville, G. Manney, G. L. Rieder, Harald 2015 https://dx.doi.org/10.7916/d8833rfm https://academiccommons.columbia.edu/doi/10.7916/D8833RFM unknown Columbia University https://dx.doi.org/10.5194/acp-15-1585-2015 Atmospheric chemistry Atmosphere Atmosphere, Upper Text Articles article-journal ScholarlyArticle 2015 ftdatacite https://doi.org/10.7916/d8833rfm https://doi.org/10.5194/acp-15-1585-2015 2021-11-05T12:55:41Z Continuous measurements of total ozone (by Dobson spectrophotometers) across the contiguous United States began in the early 1960s. Here, we analyze temporal and spatial variability and trends in total ozone from the five US sites with long-term records. While similar long-term ozone changes are detected at all five sites, we find differences in the patterns of ozone variability on shorter timescales. In addition to standard evaluation techniques, STL-decomposition methods (Seasonal Trend decomposition of time series based on LOESS (LOcally wEighted Scatterplot Smoothing)) are used to address temporal variability and "fingerprints" of dynamical features in the Dobson data. Methods from statistical extreme value theory (EVT) are used to characterize days with high and low total ozone (termed EHOs and ELOs, respectively) at each station and to analyze temporal changes in the frequency of ozone extremes and their relationship to dynamical features such as the North Atlantic Oscillation (NAO) and El Niño–Southern Oscillation. A comparison of the fingerprints detected in the frequency distribution of the extremes with those for standard metrics (i.e., the mean) shows that more fingerprints are found for the extremes, particularly for the positive phase of the NAO, at all five US monitoring sites. Results from the STL decomposition support the findings of the EVT analysis. Finally, we analyze the relative influence of low- and high-ozone events on seasonal mean column ozone at each station. The results show that the influence of ELOs and EHOs on seasonal mean column ozone can be as much as ±5 %, about as large as the overall long-term decadal ozone trends. Text North Atlantic North Atlantic oscillation DataCite Metadata Store (German National Library of Science and Technology) |
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Atmospheric chemistry Atmosphere Atmosphere, Upper |
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Atmospheric chemistry Atmosphere Atmosphere, Upper Petropavlovskikh, I. Evans, R. McConville, G. Manney, G. L. Rieder, Harald The influence of the North Atlantic Oscillation and El Niño–Southern Oscillation on mean and extreme values of column ozone over the United States |
topic_facet |
Atmospheric chemistry Atmosphere Atmosphere, Upper |
description |
Continuous measurements of total ozone (by Dobson spectrophotometers) across the contiguous United States began in the early 1960s. Here, we analyze temporal and spatial variability and trends in total ozone from the five US sites with long-term records. While similar long-term ozone changes are detected at all five sites, we find differences in the patterns of ozone variability on shorter timescales. In addition to standard evaluation techniques, STL-decomposition methods (Seasonal Trend decomposition of time series based on LOESS (LOcally wEighted Scatterplot Smoothing)) are used to address temporal variability and "fingerprints" of dynamical features in the Dobson data. Methods from statistical extreme value theory (EVT) are used to characterize days with high and low total ozone (termed EHOs and ELOs, respectively) at each station and to analyze temporal changes in the frequency of ozone extremes and their relationship to dynamical features such as the North Atlantic Oscillation (NAO) and El Niño–Southern Oscillation. A comparison of the fingerprints detected in the frequency distribution of the extremes with those for standard metrics (i.e., the mean) shows that more fingerprints are found for the extremes, particularly for the positive phase of the NAO, at all five US monitoring sites. Results from the STL decomposition support the findings of the EVT analysis. Finally, we analyze the relative influence of low- and high-ozone events on seasonal mean column ozone at each station. The results show that the influence of ELOs and EHOs on seasonal mean column ozone can be as much as ±5 %, about as large as the overall long-term decadal ozone trends. |
format |
Text |
author |
Petropavlovskikh, I. Evans, R. McConville, G. Manney, G. L. Rieder, Harald |
author_facet |
Petropavlovskikh, I. Evans, R. McConville, G. Manney, G. L. Rieder, Harald |
author_sort |
Petropavlovskikh, I. |
title |
The influence of the North Atlantic Oscillation and El Niño–Southern Oscillation on mean and extreme values of column ozone over the United States |
title_short |
The influence of the North Atlantic Oscillation and El Niño–Southern Oscillation on mean and extreme values of column ozone over the United States |
title_full |
The influence of the North Atlantic Oscillation and El Niño–Southern Oscillation on mean and extreme values of column ozone over the United States |
title_fullStr |
The influence of the North Atlantic Oscillation and El Niño–Southern Oscillation on mean and extreme values of column ozone over the United States |
title_full_unstemmed |
The influence of the North Atlantic Oscillation and El Niño–Southern Oscillation on mean and extreme values of column ozone over the United States |
title_sort |
influence of the north atlantic oscillation and el niño–southern oscillation on mean and extreme values of column ozone over the united states |
publisher |
Columbia University |
publishDate |
2015 |
url |
https://dx.doi.org/10.7916/d8833rfm https://academiccommons.columbia.edu/doi/10.7916/D8833RFM |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_relation |
https://dx.doi.org/10.5194/acp-15-1585-2015 |
op_doi |
https://doi.org/10.7916/d8833rfm https://doi.org/10.5194/acp-15-1585-2015 |
_version_ |
1766129333027471360 |