Longitude-dependent decadal ozone changes and ozone trends in boreal winter months during 1960-2000
This study examines the longitude-dependent decadal changes and trends of ozone for the boreal winter months during the period of 1960–2000. These changes are caused primarily by changes in the planetary wave structure in the upper troposphere and lower stratosphere. The decadal changes and trends o...
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ftleibnizopen:oai:oai.leibnizopen.de:q9lQoYoBbHMkKcxzCPgs 2023-10-09T21:49:35+02:00 Longitude-dependent decadal ozone changes and ozone trends in boreal winter months during 1960-2000 Peters, D.H.W. Gabriel, A. Entzian, G. 2008 application/pdf https://doi.org/10.34657/4074 https://oa.tib.eu/renate/handle/123456789/5445 eng eng Göttingen : Copernicus CC BY 3.0 Unported https://creativecommons.org/licenses/by/3.0/ Annales Geophysicae 26 (2008), 5 anticyclone decadal variation geopotential ozone planetary wave Rossby wave stratosphere troposphere winter Africa Arctic Asia Atlantic Ocean Atlantic Ocean (North) Atlantic Ocean (Northeast) Central Asia Eurasia Europe Greenland North Africa Western Europe 550 article Text 2008 ftleibnizopen https://doi.org/10.34657/4074 2023-09-17T23:33:58Z This study examines the longitude-dependent decadal changes and trends of ozone for the boreal winter months during the period of 1960–2000. These changes are caused primarily by changes in the planetary wave structure in the upper troposphere and lower stratosphere. The decadal changes and trends over 4 decades of geopotential perturbations, defined as a deviation from the zonal mean, are estimated by linear regression with time. The decadal changes in longitude-dependent ozone were calculated with a simple transport model of ozone based on the known planetary wave structure changes and prescribed zonal mean ozone gradients. For December of the 1960s and 1980s a statistically significant Rossby wave track appeared over the North Atlantic and Europe with an anticyclonic disturbance over the Eastern North Atlantic and Western Europe, flanked by cyclonic disturbances. In the 1970s and 1990s statistically significant cyclonic disturbances appeared over the Eastern North Atlantic and Europe, surrounded by anticyclonic anomalies over Northern Africa, Central Asia and Greenland. Similar patterns have been found for January. The Rossby wave track over the North Atlantic and Europe is stronger in the 1980s than in the 1960s. For February, the variability of the regression patterns is higher. For January we found a strong alteration in the modelled decadal changes in total ozone over Central and Northern Europe, showing a decrease of about 15 DU in the 1960s and 1980s and an increase of about 10 DU in the 1970s and 1990s. Over Central Europe the positive geopotential height trend (increase of 2.3 m/yr) over 40 years is of the same order (about 100 m) as the increase in the 1980s alone. This is important to recognize because it implies a total ozone decrease over Europe of the order of 14 DU for the 1960–2000 period, for January, if we use the standard change regression relation that about a 10-m geopotential height increase at 300 hPa is related to about a 1.4-DU total ozone decrease. publishedVersion Article in Journal/Newspaper Arctic Greenland North Atlantic LeibnizOpen (The Leibniz Association) Arctic Greenland |
institution |
Open Polar |
collection |
LeibnizOpen (The Leibniz Association) |
op_collection_id |
ftleibnizopen |
language |
English |
topic |
anticyclone decadal variation geopotential ozone planetary wave Rossby wave stratosphere troposphere winter Africa Arctic Asia Atlantic Ocean Atlantic Ocean (North) Atlantic Ocean (Northeast) Central Asia Eurasia Europe Greenland North Africa Western Europe 550 |
spellingShingle |
anticyclone decadal variation geopotential ozone planetary wave Rossby wave stratosphere troposphere winter Africa Arctic Asia Atlantic Ocean Atlantic Ocean (North) Atlantic Ocean (Northeast) Central Asia Eurasia Europe Greenland North Africa Western Europe 550 Peters, D.H.W. Gabriel, A. Entzian, G. Longitude-dependent decadal ozone changes and ozone trends in boreal winter months during 1960-2000 |
topic_facet |
anticyclone decadal variation geopotential ozone planetary wave Rossby wave stratosphere troposphere winter Africa Arctic Asia Atlantic Ocean Atlantic Ocean (North) Atlantic Ocean (Northeast) Central Asia Eurasia Europe Greenland North Africa Western Europe 550 |
description |
This study examines the longitude-dependent decadal changes and trends of ozone for the boreal winter months during the period of 1960–2000. These changes are caused primarily by changes in the planetary wave structure in the upper troposphere and lower stratosphere. The decadal changes and trends over 4 decades of geopotential perturbations, defined as a deviation from the zonal mean, are estimated by linear regression with time. The decadal changes in longitude-dependent ozone were calculated with a simple transport model of ozone based on the known planetary wave structure changes and prescribed zonal mean ozone gradients. For December of the 1960s and 1980s a statistically significant Rossby wave track appeared over the North Atlantic and Europe with an anticyclonic disturbance over the Eastern North Atlantic and Western Europe, flanked by cyclonic disturbances. In the 1970s and 1990s statistically significant cyclonic disturbances appeared over the Eastern North Atlantic and Europe, surrounded by anticyclonic anomalies over Northern Africa, Central Asia and Greenland. Similar patterns have been found for January. The Rossby wave track over the North Atlantic and Europe is stronger in the 1980s than in the 1960s. For February, the variability of the regression patterns is higher. For January we found a strong alteration in the modelled decadal changes in total ozone over Central and Northern Europe, showing a decrease of about 15 DU in the 1960s and 1980s and an increase of about 10 DU in the 1970s and 1990s. Over Central Europe the positive geopotential height trend (increase of 2.3 m/yr) over 40 years is of the same order (about 100 m) as the increase in the 1980s alone. This is important to recognize because it implies a total ozone decrease over Europe of the order of 14 DU for the 1960–2000 period, for January, if we use the standard change regression relation that about a 10-m geopotential height increase at 300 hPa is related to about a 1.4-DU total ozone decrease. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Peters, D.H.W. Gabriel, A. Entzian, G. |
author_facet |
Peters, D.H.W. Gabriel, A. Entzian, G. |
author_sort |
Peters, D.H.W. |
title |
Longitude-dependent decadal ozone changes and ozone trends in boreal winter months during 1960-2000 |
title_short |
Longitude-dependent decadal ozone changes and ozone trends in boreal winter months during 1960-2000 |
title_full |
Longitude-dependent decadal ozone changes and ozone trends in boreal winter months during 1960-2000 |
title_fullStr |
Longitude-dependent decadal ozone changes and ozone trends in boreal winter months during 1960-2000 |
title_full_unstemmed |
Longitude-dependent decadal ozone changes and ozone trends in boreal winter months during 1960-2000 |
title_sort |
longitude-dependent decadal ozone changes and ozone trends in boreal winter months during 1960-2000 |
publisher |
Göttingen : Copernicus |
publishDate |
2008 |
url |
https://doi.org/10.34657/4074 https://oa.tib.eu/renate/handle/123456789/5445 |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Greenland North Atlantic |
genre_facet |
Arctic Greenland North Atlantic |
op_source |
Annales Geophysicae 26 (2008), 5 |
op_rights |
CC BY 3.0 Unported https://creativecommons.org/licenses/by/3.0/ |
op_doi |
https://doi.org/10.34657/4074 |
_version_ |
1779312600479170560 |