Impact of the North Atlantic oscillation on winter convection: convective precipitation and cloud‐to‐ground lightning
Abstract The relationship between the North Atlantic oscillation (NAO) and winter (November to March) convection is analysed using two convective parameters: convective precipitation (CP) and cloud‐to‐ground (CG) lightning. Using winter CP values from 1950 to 2000 over the North Atlantic and western...
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crwiley:10.1002/joc.1067 2024-06-02T08:11:09+00:00 Impact of the North Atlantic oscillation on winter convection: convective precipitation and cloud‐to‐ground lightning Rivas Soriano, Luis De Pablo, Fernando Tomas, Clemente 2004 http://dx.doi.org/10.1002/joc.1067 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjoc.1067 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/joc.1067 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor International Journal of Climatology volume 24, issue 10, page 1241-1247 ISSN 0899-8418 1097-0088 journal-article 2004 crwiley https://doi.org/10.1002/joc.1067 2024-05-03T11:19:21Z Abstract The relationship between the North Atlantic oscillation (NAO) and winter (November to March) convection is analysed using two convective parameters: convective precipitation (CP) and cloud‐to‐ground (CG) lightning. Using winter CP values from 1950 to 2000 over the North Atlantic and western European area (30–70 °N, 60 °W–10 °E), positive correlations were found between the NAO index values and CP at latitudes higher than ∼50 °N, whereas negative correlations were found for latitudes lower than 50 °N. The spatial pattern of correlation coefficients at latitudes higher (lower) than ∼50 °N suggests that the advection of temperature (moisture) is the main factor contributing to the relationship between the NAO and CP. The NAO accounts for 47% (25%) of the first principal component of CP interannual variance at latitudes higher (lower) than 50 °N. The monthly winter CG lightning‐flash density for 9 years (1992–2000) over the Iberian Peninsula was analysed in relation to the NAO on a small spatial scale (0.4° longitude × 0.4° latitude). The results were consistent with those found for the CP over the same zone. The correlation coefficient between the monthly NAO index value and the monthly CG flash number is r = −0.6, suggesting a relationship between them. Spatial variations in this relationship were also studied. The results indicated that the impact of the NAO on CG lightning is stronger on the western Iberian Peninsula and decreases eastwards. Copyright © 2004 Royal Meteorological Society Article in Journal/Newspaper North Atlantic North Atlantic oscillation Wiley Online Library International Journal of Climatology 24 10 1241 1247 |
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Wiley Online Library |
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English |
description |
Abstract The relationship between the North Atlantic oscillation (NAO) and winter (November to March) convection is analysed using two convective parameters: convective precipitation (CP) and cloud‐to‐ground (CG) lightning. Using winter CP values from 1950 to 2000 over the North Atlantic and western European area (30–70 °N, 60 °W–10 °E), positive correlations were found between the NAO index values and CP at latitudes higher than ∼50 °N, whereas negative correlations were found for latitudes lower than 50 °N. The spatial pattern of correlation coefficients at latitudes higher (lower) than ∼50 °N suggests that the advection of temperature (moisture) is the main factor contributing to the relationship between the NAO and CP. The NAO accounts for 47% (25%) of the first principal component of CP interannual variance at latitudes higher (lower) than 50 °N. The monthly winter CG lightning‐flash density for 9 years (1992–2000) over the Iberian Peninsula was analysed in relation to the NAO on a small spatial scale (0.4° longitude × 0.4° latitude). The results were consistent with those found for the CP over the same zone. The correlation coefficient between the monthly NAO index value and the monthly CG flash number is r = −0.6, suggesting a relationship between them. Spatial variations in this relationship were also studied. The results indicated that the impact of the NAO on CG lightning is stronger on the western Iberian Peninsula and decreases eastwards. Copyright © 2004 Royal Meteorological Society |
format |
Article in Journal/Newspaper |
author |
Rivas Soriano, Luis De Pablo, Fernando Tomas, Clemente |
spellingShingle |
Rivas Soriano, Luis De Pablo, Fernando Tomas, Clemente Impact of the North Atlantic oscillation on winter convection: convective precipitation and cloud‐to‐ground lightning |
author_facet |
Rivas Soriano, Luis De Pablo, Fernando Tomas, Clemente |
author_sort |
Rivas Soriano, Luis |
title |
Impact of the North Atlantic oscillation on winter convection: convective precipitation and cloud‐to‐ground lightning |
title_short |
Impact of the North Atlantic oscillation on winter convection: convective precipitation and cloud‐to‐ground lightning |
title_full |
Impact of the North Atlantic oscillation on winter convection: convective precipitation and cloud‐to‐ground lightning |
title_fullStr |
Impact of the North Atlantic oscillation on winter convection: convective precipitation and cloud‐to‐ground lightning |
title_full_unstemmed |
Impact of the North Atlantic oscillation on winter convection: convective precipitation and cloud‐to‐ground lightning |
title_sort |
impact of the north atlantic oscillation on winter convection: convective precipitation and cloud‐to‐ground lightning |
publisher |
Wiley |
publishDate |
2004 |
url |
http://dx.doi.org/10.1002/joc.1067 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjoc.1067 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/joc.1067 |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
International Journal of Climatology volume 24, issue 10, page 1241-1247 ISSN 0899-8418 1097-0088 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/joc.1067 |
container_title |
International Journal of Climatology |
container_volume |
24 |
container_issue |
10 |
container_start_page |
1241 |
op_container_end_page |
1247 |
_version_ |
1800757192386674688 |