Projection of North Atlantic Oscillation and its effect on tracer transport
The North Atlantic Oscillation (NAO) plays an important role in the climate variability of the Northern Hemisphere, with significant consequences on long-range pollutant transport. We investigate the evolution of pollutant transport in the 21st century influenced by the NAO under a global climate ch...
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ftdoajarticles:oai:doaj.org/article:6692a755b9c044859f04c558de2d36ce 2023-05-15T17:30:54+02:00 Projection of North Atlantic Oscillation and its effect on tracer transport S. Bacer T. Christoudias A. Pozzer 2016-12-01T00:00:00Z https://doi.org/10.5194/acp-16-15581-2016 https://doaj.org/article/6692a755b9c044859f04c558de2d36ce EN eng Copernicus Publications https://www.atmos-chem-phys.net/16/15581/2016/acp-16-15581-2016.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 doi:10.5194/acp-16-15581-2016 1680-7316 1680-7324 https://doaj.org/article/6692a755b9c044859f04c558de2d36ce Atmospheric Chemistry and Physics, Vol 16, Pp 15581-15592 (2016) Physics QC1-999 Chemistry QD1-999 article 2016 ftdoajarticles https://doi.org/10.5194/acp-16-15581-2016 2022-12-30T23:13:03Z The North Atlantic Oscillation (NAO) plays an important role in the climate variability of the Northern Hemisphere, with significant consequences on long-range pollutant transport. We investigate the evolution of pollutant transport in the 21st century influenced by the NAO under a global climate change scenario. We use a free-running simulation performed by the ECHAM/MESSy Atmospheric Chemistry (EMAC) model coupled with the ocean general circulation model MPIOM, covering the period from 1950 until 2100. Similarly to other works, the model shows a future northeastward shift of the NAO centres of action and a weak positive trend of the NAO index (over 150 years). Moreover, we find that NAO trends (computed over periods shorter than 30 years) will continue to oscillate between positive and negative values in the future. To investigate the NAO effects on transport we consider carbon monoxide tracers with exponential decay and constant interannual emissions. We find that at the end of the century, the south-western Mediterranean and northern Africa will, during positive NAO phases, see higher pollutant concentrations with respect to the past, while a wider part of northern Europe will, during positive NAO phases, see lower pollutant concentrations. Such results are confirmed by the changes observed in the future for tracer concentration and vertically integrated tracer transport, differentiating the cases of “high NAO” and “low NAO” events. Article in Journal/Newspaper North Atlantic North Atlantic oscillation Directory of Open Access Journals: DOAJ Articles Atmospheric Chemistry and Physics 16 24 15581 15592 |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
language |
English |
topic |
Physics QC1-999 Chemistry QD1-999 |
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Physics QC1-999 Chemistry QD1-999 S. Bacer T. Christoudias A. Pozzer Projection of North Atlantic Oscillation and its effect on tracer transport |
topic_facet |
Physics QC1-999 Chemistry QD1-999 |
description |
The North Atlantic Oscillation (NAO) plays an important role in the climate variability of the Northern Hemisphere, with significant consequences on long-range pollutant transport. We investigate the evolution of pollutant transport in the 21st century influenced by the NAO under a global climate change scenario. We use a free-running simulation performed by the ECHAM/MESSy Atmospheric Chemistry (EMAC) model coupled with the ocean general circulation model MPIOM, covering the period from 1950 until 2100. Similarly to other works, the model shows a future northeastward shift of the NAO centres of action and a weak positive trend of the NAO index (over 150 years). Moreover, we find that NAO trends (computed over periods shorter than 30 years) will continue to oscillate between positive and negative values in the future. To investigate the NAO effects on transport we consider carbon monoxide tracers with exponential decay and constant interannual emissions. We find that at the end of the century, the south-western Mediterranean and northern Africa will, during positive NAO phases, see higher pollutant concentrations with respect to the past, while a wider part of northern Europe will, during positive NAO phases, see lower pollutant concentrations. Such results are confirmed by the changes observed in the future for tracer concentration and vertically integrated tracer transport, differentiating the cases of “high NAO” and “low NAO” events. |
format |
Article in Journal/Newspaper |
author |
S. Bacer T. Christoudias A. Pozzer |
author_facet |
S. Bacer T. Christoudias A. Pozzer |
author_sort |
S. Bacer |
title |
Projection of North Atlantic Oscillation and its effect on tracer transport |
title_short |
Projection of North Atlantic Oscillation and its effect on tracer transport |
title_full |
Projection of North Atlantic Oscillation and its effect on tracer transport |
title_fullStr |
Projection of North Atlantic Oscillation and its effect on tracer transport |
title_full_unstemmed |
Projection of North Atlantic Oscillation and its effect on tracer transport |
title_sort |
projection of north atlantic oscillation and its effect on tracer transport |
publisher |
Copernicus Publications |
publishDate |
2016 |
url |
https://doi.org/10.5194/acp-16-15581-2016 https://doaj.org/article/6692a755b9c044859f04c558de2d36ce |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
Atmospheric Chemistry and Physics, Vol 16, Pp 15581-15592 (2016) |
op_relation |
https://www.atmos-chem-phys.net/16/15581/2016/acp-16-15581-2016.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 doi:10.5194/acp-16-15581-2016 1680-7316 1680-7324 https://doaj.org/article/6692a755b9c044859f04c558de2d36ce |
op_doi |
https://doi.org/10.5194/acp-16-15581-2016 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
16 |
container_issue |
24 |
container_start_page |
15581 |
op_container_end_page |
15592 |
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1766128034908209152 |