AbstractsEarth & Environmental Science

Eastern Tropical Pacific ITCZ and Lightning Activity

by Freja Söderberg

Institution: Uppsala University
Year: 2014
Keywords: Intertropical convergence zone; Lightning activity; Eastern tropical Pacific; Natural Sciences; Earth and Related Environmental Sciences; Meteorology and Atmospheric Sciences; Naturvetenskap; Geovetenskap och miljövetenskap; Meteorologi och atmosfärforskning; Bachelor Programme in Physics; Kandidatprogram i fysik; Meteorology; Meteorologi
Record ID: 1344496
Full text PDF: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-227427


This study has been performed as a pilot study for a project regarding the meridional migration of the Intertropical Convergence Zone (ITCZ) and its relationship with lightning activity in the Eastern Tropical Pacific (ETP). Objectives of this study were to analyze and improve lightning data to be used for such a study and to decide on a method and proper time scale of data analysis and ITCZ index development for this study. Exploratory data analysis has been practiced with World Wide Lightning Location Network (WWLLN) data and ITCZ index data. Results suggest that the most beneficial time-scale to be used for the above study is 15 days and that ITCZ estimations can be obtained via the use of precipitation index and cloud top temperature. Lightning data originated from atmospheric systems not associated with the ITCZ has been analyzed. This report proposes that Uppsala University should become part of the World Wide Lightning Location Network, enabling further work regarding this and similar projects.