Evidence of impact of aviation on cirrus cloud formation
This work examines changes in cirrus cloud cover (CCC) in possible association with aviation activities at congested air corridors. The analysis is based on the latest version of the International Satellite Cloud Climatology Project D2 data set and covers the period 1984-1998. Over the studied areas...
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ftnkunivathens:oai:lib.uoa.gr:uoadl:3018114 2024-02-11T10:06:13+01:00 Evidence of impact of aviation on cirrus cloud formation Zerefos, C.S. Eleftheratos, K. Balis, D.S. Zanis, P. Tselioudis, G. Meleti, C. 2003-01-01 https://pergamos.lib.uoa.gr/uoa/dl/object/uoadl:3018114 Αγγλικά English eng uoadl:3018114 https://pergamos.lib.uoa.gr/uoa/dl/object/uoadl:3018114 scientific_publication_article Επιστημονική δημοσίευση - Άρθρο Περιοδικού Scientific publication - Journal Article 2003 ftnkunivathens 2024-01-18T18:43:44Z This work examines changes in cirrus cloud cover (CCC) in possible association with aviation activities at congested air corridors. The analysis is based on the latest version of the International Satellite Cloud Climatology Project D2 data set and covers the period 1984-1998. Over the studied areas, the effect of large-scale modes of natural climate variability such as ENSO, QBO and NAO as well as the possible influence of the tropopause variability, were first removed from the cloud data set in order to calculate long-term changes of observed cirrus cloudiness. The results show increasing trends in (CCC) between 1984 and 1998 over the high air traffic corridors of North America, North Atlantic and Europe. Of these upward trends, only in the summertime over the North Atlantic and only in the wintertime over North America are statistically significant (exceeding +2.0% per decade). Over adjacent locations with low air traffic, the calculated trends are statistically insignificant and in most cases negative both during winter and summer in the regions studied. These negative trends, over low air traffic regions, are consistent with the observed large scale negative trends seen in (CCC) over most of the northern middle latitudes and over the tropics. Moreover, further investigation of vertical velocities over high and low air traffic regions provide evidence that the trends of opposite signs in (CCC) over these regions, do not seem to be caused by different trends in dynamics. It is also shown that the longitudinal distribution of decadal changes in (CCC) along the latitude belt centered at the North Atlantic air corridor, parallels the spatial distribution of fuel consumption from highflying air traffic, providing an independent test of possible impact of aviation on contrail cirrus formation. The correlation between the fuel consumption and the longitudinal variability of (CCC) is significant (+0.7) over the middle latitudes but not over the tropics. This could be explained by the fact that over the tropics the ... Article in Journal/Newspaper North Atlantic Pergamos - Library and Information Center of National and Kapodistrian University of Athens |
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Open Polar |
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Pergamos - Library and Information Center of National and Kapodistrian University of Athens |
op_collection_id |
ftnkunivathens |
language |
English |
description |
This work examines changes in cirrus cloud cover (CCC) in possible association with aviation activities at congested air corridors. The analysis is based on the latest version of the International Satellite Cloud Climatology Project D2 data set and covers the period 1984-1998. Over the studied areas, the effect of large-scale modes of natural climate variability such as ENSO, QBO and NAO as well as the possible influence of the tropopause variability, were first removed from the cloud data set in order to calculate long-term changes of observed cirrus cloudiness. The results show increasing trends in (CCC) between 1984 and 1998 over the high air traffic corridors of North America, North Atlantic and Europe. Of these upward trends, only in the summertime over the North Atlantic and only in the wintertime over North America are statistically significant (exceeding +2.0% per decade). Over adjacent locations with low air traffic, the calculated trends are statistically insignificant and in most cases negative both during winter and summer in the regions studied. These negative trends, over low air traffic regions, are consistent with the observed large scale negative trends seen in (CCC) over most of the northern middle latitudes and over the tropics. Moreover, further investigation of vertical velocities over high and low air traffic regions provide evidence that the trends of opposite signs in (CCC) over these regions, do not seem to be caused by different trends in dynamics. It is also shown that the longitudinal distribution of decadal changes in (CCC) along the latitude belt centered at the North Atlantic air corridor, parallels the spatial distribution of fuel consumption from highflying air traffic, providing an independent test of possible impact of aviation on contrail cirrus formation. The correlation between the fuel consumption and the longitudinal variability of (CCC) is significant (+0.7) over the middle latitudes but not over the tropics. This could be explained by the fact that over the tropics the ... |
format |
Article in Journal/Newspaper |
author |
Zerefos, C.S. Eleftheratos, K. Balis, D.S. Zanis, P. Tselioudis, G. Meleti, C. |
spellingShingle |
Zerefos, C.S. Eleftheratos, K. Balis, D.S. Zanis, P. Tselioudis, G. Meleti, C. Evidence of impact of aviation on cirrus cloud formation |
author_facet |
Zerefos, C.S. Eleftheratos, K. Balis, D.S. Zanis, P. Tselioudis, G. Meleti, C. |
author_sort |
Zerefos, C.S. |
title |
Evidence of impact of aviation on cirrus cloud formation |
title_short |
Evidence of impact of aviation on cirrus cloud formation |
title_full |
Evidence of impact of aviation on cirrus cloud formation |
title_fullStr |
Evidence of impact of aviation on cirrus cloud formation |
title_full_unstemmed |
Evidence of impact of aviation on cirrus cloud formation |
title_sort |
evidence of impact of aviation on cirrus cloud formation |
publishDate |
2003 |
url |
https://pergamos.lib.uoa.gr/uoa/dl/object/uoadl:3018114 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
uoadl:3018114 https://pergamos.lib.uoa.gr/uoa/dl/object/uoadl:3018114 |
_version_ |
1790603791484059648 |