Share of Discontinuities in the Ozone Concentration Data from Three Reanalyses

Ozone is a very important trace gas in the stratosphere and, thus, we need to know its time evolution over the globe. However, ground-based measurements are rare, especially in the Southern Hemisphere, and while satellite observations provide broader spatial coverage generally, they are not availabl...

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Autores principales:	Peter Krizan, Michal Kozubek, Jan Lastovicka, Radek Lan
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	discontinuity in ozone concentration data trend analysis data quality Meteorology. Climatology QC851-999
Acceso en línea:	https://doaj.org/article/c9ef9bcb98594210bf8cbfed03bf5473
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spelling	oai:doaj.org-article:c9ef9bcb98594210bf8cbfed03bf54732021-11-25T16:45:45ZShare of Discontinuities in the Ozone Concentration Data from Three Reanalyses10.3390/atmos121115082073-4433https://doaj.org/article/c9ef9bcb98594210bf8cbfed03bf54732021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4433/12/11/1508https://doaj.org/toc/2073-4433Ozone is a very important trace gas in the stratosphere and, thus, we need to know its time evolution over the globe. However, ground-based measurements are rare, especially in the Southern Hemisphere, and while satellite observations provide broader spatial coverage generally, they are not available everywhere. On the other hand, reanalysis data have regular spatial and temporal structure, which is beneficial for trend analysis, but temporal discontinuities might exist in the data. These discontinuities may influence the results of trend studies. The aim of this paper is to detect discontinuities in ozone data of the following reanalyses: MERRA-2, ERA-5 and JRA-55 with the help of the Pettitt, the Buishand, and the Standard Normal Homogeneity tests above the 500 hPa level. The share of discontinuities varies from 30% to 70% and they are strongly layer dependent. The share of discontinuities is the lowest for JRA-55. Differences between reanalyses were found to be larger than differences between homogeneity tests within one reanalysis. Another aim of this paper is to test the ability of homogeneity tests to detect the discontinuities in 2004 and 2015, when changes in versions of satellite data took place. We showed the discontinuities in 2004 are better detected than those in 2015.Peter KrizanMichal KozubekJan LastovickaRadek LanMDPI AGarticlediscontinuity in ozone concentration datatrend analysisdata qualityMeteorology. ClimatologyQC851-999ENAtmosphere, Vol 12, Iss 1508, p 1508 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	discontinuity in ozone concentration data trend analysis data quality Meteorology. Climatology QC851-999
spellingShingle	discontinuity in ozone concentration data trend analysis data quality Meteorology. Climatology QC851-999 Peter Krizan Michal Kozubek Jan Lastovicka Radek Lan Share of Discontinuities in the Ozone Concentration Data from Three Reanalyses
description	Ozone is a very important trace gas in the stratosphere and, thus, we need to know its time evolution over the globe. However, ground-based measurements are rare, especially in the Southern Hemisphere, and while satellite observations provide broader spatial coverage generally, they are not available everywhere. On the other hand, reanalysis data have regular spatial and temporal structure, which is beneficial for trend analysis, but temporal discontinuities might exist in the data. These discontinuities may influence the results of trend studies. The aim of this paper is to detect discontinuities in ozone data of the following reanalyses: MERRA-2, ERA-5 and JRA-55 with the help of the Pettitt, the Buishand, and the Standard Normal Homogeneity tests above the 500 hPa level. The share of discontinuities varies from 30% to 70% and they are strongly layer dependent. The share of discontinuities is the lowest for JRA-55. Differences between reanalyses were found to be larger than differences between homogeneity tests within one reanalysis. Another aim of this paper is to test the ability of homogeneity tests to detect the discontinuities in 2004 and 2015, when changes in versions of satellite data took place. We showed the discontinuities in 2004 are better detected than those in 2015.
format	article
author	Peter Krizan Michal Kozubek Jan Lastovicka Radek Lan
author_facet	Peter Krizan Michal Kozubek Jan Lastovicka Radek Lan
author_sort	Peter Krizan
title	Share of Discontinuities in the Ozone Concentration Data from Three Reanalyses
title_short	Share of Discontinuities in the Ozone Concentration Data from Three Reanalyses
title_full	Share of Discontinuities in the Ozone Concentration Data from Three Reanalyses
title_fullStr	Share of Discontinuities in the Ozone Concentration Data from Three Reanalyses
title_full_unstemmed	Share of Discontinuities in the Ozone Concentration Data from Three Reanalyses
title_sort	share of discontinuities in the ozone concentration data from three reanalyses
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/c9ef9bcb98594210bf8cbfed03bf5473
work_keys_str_mv	AT peterkrizan shareofdiscontinuitiesintheozoneconcentrationdatafromthreereanalyses AT michalkozubek shareofdiscontinuitiesintheozoneconcentrationdatafromthreereanalyses AT janlastovicka shareofdiscontinuitiesintheozoneconcentrationdatafromthreereanalyses AT radeklan shareofdiscontinuitiesintheozoneconcentrationdatafromthreereanalyses
_version_	1718413043191250944

Share of Discontinuities in the Ozone Concentration Data from Three Reanalyses

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