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Pivotal role of the North African Dipole Intensity (NAFDI) on alternate Saharan dust export over the North Atlantic and the Mediterranean, and relationship with the Saharan Heat Low and mid-latitude Rossby waves [Discussion paper]
Título : Pivotal role of the North African Dipole Intensity (NAFDI) on alternate Saharan dust export over the North Atlantic and the Mediterranean, and relationship with the Saharan Heat Low and mid-latitude Rossby waves [Discussion paper]
Autor : Cuevas Agulló, Emilio ORCID RESEARCHERID SCOPUSID Gómez Peláez, Ángel Jesús ORCID RESEARCHERID SCOPUSID Rodríguez González, Sergio ORCID RESEARCHERID Terradellas, EnricBasart, SaraGarcía Cabrera, Rosa Delia ORCID RESEARCHERID García Rodríguez, Omaira Elena ORCID RESEARCHERID Alonso-Pérez, Silvia
Palabras clave : North African Dipole Intensity; Saharan dust; Saharan heat low; Rossby waves
Fecha de publicación : 2016
Editor: European Geosciences Union
Citación : Atmospheric Chemistry and Physics Discussions. 2016
Versión del editor: https://dx.doi.org/10.5194/acp-2016-287
Resumen : In this study, we revise the index that quantifies the North African Dipole Intensity (NAFDI), and explain its relationship with the Saharan Heat Low (SHL) and mid-latitude Rossby waves. We find outstanding similarities of meteorological patterns associated with the positive NAFDI and the SHL West-phase on the one hand, and with the negative NAFDI and the SHL East-Phase, on the other hand. We introduce the daily NAFDI index and the daily SHL West-East Displacement Index (SHLWEDI). The Pearson correlation coefficient between the daily SHLWEDI 1-day lagged and the daily NAFDI for the period 1980–2013 20 June–17 September is fairly high (r = 0.77). The correlation reduces to 0.69 if the SHLWEDI is not lagged. We observe that the SHL West-phase is significantly more frequent than the SHL East-phase, and that the SHL is more intense during its East-phase.
Patrocinador: Part of this study was performed in the frame of AEROATLAN (grant 2015-66229), funded by the Ministry of Economy and Competitiveness of Spain.
URI : http://hdl.handle.net/20.500.11765/2190
Colecciones: Artículos científicos 2015-2018


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