Circulation-type classification derived on a climatic basis to study air quality dynamics over the Iberian Peninsula
A circulation-type classification is derived for the 1983-2012 climatic period to characterize air quality dynamics over the Iberian Peninsula (IP). Sensitivity tests to automatic classification techniques and other factors affecting the classification (number of patterns, temporal and spatial resol...
Published in: | International Journal of Climatology |
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Format: | Article in Journal/Newspaper |
Language: | English |
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John Wiley & Sons
2015
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Online Access: | http://hdl.handle.net/2117/79186 https://doi.org/10.1002/joc.4179 |
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ftupcatalunya:oai:upcommons.upc.edu:2117/79186 2023-05-15T17:37:07+02:00 Circulation-type classification derived on a climatic basis to study air quality dynamics over the Iberian Peninsula Valverde Morales, Victor Manuel Pay Pérez, M. Teresa Baldasano Recio, José María Universitat Politècnica de Catalunya. Departament d'Enginyeria de Projectes i de la Construcció Universitat Politècnica de Catalunya. GReCT - Grup de Recerca de Ciències de la Terra 2015-08-01 21 p. http://hdl.handle.net/2117/79186 https://doi.org/10.1002/joc.4179 eng eng John Wiley & Sons http://onlinelibrary.wiley.com/doi/10.1002/joc.4179/full http://creativecommons.org/licenses/by-nc-nd/3.0/es/ Open Access CC-BY-NC-ND Àrees temàtiques de la UPC::Desenvolupament humà i sostenible::Degradació ambiental::Contaminació atmosfèrica Air quality -- Measurement -- Mathematical models Air -- Pollution Atmospheric circulation Climatology Nitrogen oxids Particles -- Environmental aspects climate synoptic classification circulation types air quality NO2 COST733 ERA-Interim range transport episodes Mediterranean area North-atlantic particulate matter modeling system weather regimes patterns pollution Europe Aire -- Qualitat -- Mesurament -- Models matemàtics Aire -- Contaminació Circulació atmosfèrica Climatologia Òxids de nitrògen Partícules (Matèria) -- Aspectes ambientals Article 2015 ftupcatalunya https://doi.org/10.1002/joc.4179 2019-09-29T09:08:56Z A circulation-type classification is derived for the 1983-2012 climatic period to characterize air quality dynamics over the Iberian Peninsula (IP). Sensitivity tests to automatic classification techniques and other factors affecting the classification (number of patterns, temporal and spatial resolution, domain size, etc.) are performed to objectivize the set-up that maximizes its quality. The ERA-Interim reanalysis and the cost733class classification software are used. The identified circulation types (CTs) are described in terms of frequency, persistence, transitions, and location of isobaric systems. The temporal stability of the classification is evaluated following a cross-validation process that compares the results of the climatic and yearly classifications, leading to the identification of a representative year. Moreover, a representative day for each CT is identified using an objective score that minimizes the absolute value difference of the daily grid with respect to the average CT grid. The reference set-up uses a cluster-based technique (Ck-means) on a daily mean sea-level pressure database. Six CTs are identified, which are consistent with synoptic patterns found in the literature. Furthermore, the CTs of the climatic period are temporally stable showing similar characteristics in terms of frequency and location of high- and low-pressure systems as those of the representative year (2012). As a first application of the CT classification, 1h-maximum NO2 concentration maps from the CALIOPE Air Quality Forecasting System is analysed for the representative days. Synoptic circulation controls the origin and strength of advection explaining transport and NO2 background concentration over the IP. However, there is a strong spatial heterogeneity: in central, northern, and southern IP; NO2 concentrations are controlled by the synoptic circulation, whereas in Spanish Mediterranean coastal areas, a combination of synoptic and mesoscale dynamics explains the NO2 concentration patterns. Postprint (author's final draft) Article in Journal/Newspaper North Atlantic Universitat Politècnica de Catalunya (UPC): Theses and Dissertations Online (TDX) International Journal of Climatology 35 10 2877 2897 |
institution |
Open Polar |
collection |
Universitat Politècnica de Catalunya (UPC): Theses and Dissertations Online (TDX) |
op_collection_id |
ftupcatalunya |
language |
English |
topic |
Àrees temàtiques de la UPC::Desenvolupament humà i sostenible::Degradació ambiental::Contaminació atmosfèrica Air quality -- Measurement -- Mathematical models Air -- Pollution Atmospheric circulation Climatology Nitrogen oxids Particles -- Environmental aspects climate synoptic classification circulation types air quality NO2 COST733 ERA-Interim range transport episodes Mediterranean area North-atlantic particulate matter modeling system weather regimes patterns pollution Europe Aire -- Qualitat -- Mesurament -- Models matemàtics Aire -- Contaminació Circulació atmosfèrica Climatologia Òxids de nitrògen Partícules (Matèria) -- Aspectes ambientals |
spellingShingle |
Àrees temàtiques de la UPC::Desenvolupament humà i sostenible::Degradació ambiental::Contaminació atmosfèrica Air quality -- Measurement -- Mathematical models Air -- Pollution Atmospheric circulation Climatology Nitrogen oxids Particles -- Environmental aspects climate synoptic classification circulation types air quality NO2 COST733 ERA-Interim range transport episodes Mediterranean area North-atlantic particulate matter modeling system weather regimes patterns pollution Europe Aire -- Qualitat -- Mesurament -- Models matemàtics Aire -- Contaminació Circulació atmosfèrica Climatologia Òxids de nitrògen Partícules (Matèria) -- Aspectes ambientals Valverde Morales, Victor Manuel Pay Pérez, M. Teresa Baldasano Recio, José María Circulation-type classification derived on a climatic basis to study air quality dynamics over the Iberian Peninsula |
topic_facet |
Àrees temàtiques de la UPC::Desenvolupament humà i sostenible::Degradació ambiental::Contaminació atmosfèrica Air quality -- Measurement -- Mathematical models Air -- Pollution Atmospheric circulation Climatology Nitrogen oxids Particles -- Environmental aspects climate synoptic classification circulation types air quality NO2 COST733 ERA-Interim range transport episodes Mediterranean area North-atlantic particulate matter modeling system weather regimes patterns pollution Europe Aire -- Qualitat -- Mesurament -- Models matemàtics Aire -- Contaminació Circulació atmosfèrica Climatologia Òxids de nitrògen Partícules (Matèria) -- Aspectes ambientals |
description |
A circulation-type classification is derived for the 1983-2012 climatic period to characterize air quality dynamics over the Iberian Peninsula (IP). Sensitivity tests to automatic classification techniques and other factors affecting the classification (number of patterns, temporal and spatial resolution, domain size, etc.) are performed to objectivize the set-up that maximizes its quality. The ERA-Interim reanalysis and the cost733class classification software are used. The identified circulation types (CTs) are described in terms of frequency, persistence, transitions, and location of isobaric systems. The temporal stability of the classification is evaluated following a cross-validation process that compares the results of the climatic and yearly classifications, leading to the identification of a representative year. Moreover, a representative day for each CT is identified using an objective score that minimizes the absolute value difference of the daily grid with respect to the average CT grid. The reference set-up uses a cluster-based technique (Ck-means) on a daily mean sea-level pressure database. Six CTs are identified, which are consistent with synoptic patterns found in the literature. Furthermore, the CTs of the climatic period are temporally stable showing similar characteristics in terms of frequency and location of high- and low-pressure systems as those of the representative year (2012). As a first application of the CT classification, 1h-maximum NO2 concentration maps from the CALIOPE Air Quality Forecasting System is analysed for the representative days. Synoptic circulation controls the origin and strength of advection explaining transport and NO2 background concentration over the IP. However, there is a strong spatial heterogeneity: in central, northern, and southern IP; NO2 concentrations are controlled by the synoptic circulation, whereas in Spanish Mediterranean coastal areas, a combination of synoptic and mesoscale dynamics explains the NO2 concentration patterns. Postprint (author's final draft) |
author2 |
Universitat Politècnica de Catalunya. Departament d'Enginyeria de Projectes i de la Construcció Universitat Politècnica de Catalunya. GReCT - Grup de Recerca de Ciències de la Terra |
format |
Article in Journal/Newspaper |
author |
Valverde Morales, Victor Manuel Pay Pérez, M. Teresa Baldasano Recio, José María |
author_facet |
Valverde Morales, Victor Manuel Pay Pérez, M. Teresa Baldasano Recio, José María |
author_sort |
Valverde Morales, Victor Manuel |
title |
Circulation-type classification derived on a climatic basis to study air quality dynamics over the Iberian Peninsula |
title_short |
Circulation-type classification derived on a climatic basis to study air quality dynamics over the Iberian Peninsula |
title_full |
Circulation-type classification derived on a climatic basis to study air quality dynamics over the Iberian Peninsula |
title_fullStr |
Circulation-type classification derived on a climatic basis to study air quality dynamics over the Iberian Peninsula |
title_full_unstemmed |
Circulation-type classification derived on a climatic basis to study air quality dynamics over the Iberian Peninsula |
title_sort |
circulation-type classification derived on a climatic basis to study air quality dynamics over the iberian peninsula |
publisher |
John Wiley & Sons |
publishDate |
2015 |
url |
http://hdl.handle.net/2117/79186 https://doi.org/10.1002/joc.4179 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
http://onlinelibrary.wiley.com/doi/10.1002/joc.4179/full |
op_rights |
http://creativecommons.org/licenses/by-nc-nd/3.0/es/ Open Access |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1002/joc.4179 |
container_title |
International Journal of Climatology |
container_volume |
35 |
container_issue |
10 |
container_start_page |
2877 |
op_container_end_page |
2897 |
_version_ |
1766136860226093056 |