%0 Journal Article
%T Circulation-Type Classification over Mexico by the Era-Interim Database and Cost733
%A Sergio Natan Gonz¨¢lez-Rocha
%A Juan Cervantes-P¨¦rez
%A Fredy Ju¨¢rez-P¨¦rez
%A Z. Arturo Gonz¨¢lez-Cerezo
%A Lizeth R¨ªos Velasco
%A In¨¦s Palomino-M¨¦ndez
%A Jos¨¦ Mar¨ªa Baldasano Recio
%J Atmospheric and Climate Sciences
%P 286-305
%@ 2160-0422
%D 2018
%I Scientific Research Publishing
%R 10.4236/acs.2018.82019
%X In this paper an approach of a synoptic classification by cluster k-means (CKM) and the European Gro&#223wettertypes (GWT) was performed and executed in COST733 package. The methodology used a CKM with nine clusters and GWT with 16. The COST733 evaluated a dataset of 30-years since 1986 to 2015. The variables selected were mean sea level pressure (mslp), geopotential height (z500 and z850), wind speed and direction (u10, v10 and u, v at 850 hPa) and relative vorticity (vo) with a 0.75<span style=\"font-family:Verdana, Helvetica, Arial;white-space:normal;background-color:#FFFFFF;\">¡ã</span> ¡Á 0.75<span style=\"font-family:Verdana, Helvetica, Arial;white-space:normal;background-color:#FFFFFF;\">¡ã</span> resolution of the data grid at 00:00, 06:00, 12:00 and 18:00 UTC and 0 steps. These results were evaluated using COST733 to find the quality of measurements by the explained variance (EV) or reduction ratio in error and pseudo F value (PF) to determine the certainty of the results. GWT-16 showed better yearly values in the evaluation with 32.7 (EV) and 354.3 (PF) against the CKM-9 of 54.2 (EV) and 1621.8 (PF). Finally, it was concluded that GWT-16 could be used for classification of synoptic systems over Mexico and the analysis of meteorological phenomena triggers on increases or decreases of atmospheric pollution in areas over Mexico.
%K Cluster k-Mean
%K Synoptic Patterns
%K European Gro&#223
%K wettertypes
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=84348