{"id":24121,"date":"2018-07-01T16:38:44","date_gmt":"2018-07-01T14:38:44","guid":{"rendered":"https:\/\/www.meteorage.com\/?post_type=scientifiques&#038;p=24121"},"modified":"2025-04-11T14:29:20","modified_gmt":"2025-04-11T12:29:20","slug":"analyse-de-la-phase-dinitiation-des-eclairs-negatifs","status":"publish","type":"scientifiques","link":"https:\/\/www.meteorage.com\/fr\/publications\/analyse-de-la-phase-dinitiation-des-eclairs-negatifs\/","title":{"rendered":"ICAE &#8211; Analyse de la phase d&rsquo;initiation des \u00e9clairs n\u00e9gatifs pr\u00e9sentant un arc en retour >100 kA\u200b"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"24121\" class=\"elementor elementor-24121\" data-elementor-post-type=\"scientifiques\">\n\t\t\t\t<div class=\"elementor-element elementor-element-95e9f7a e-con-full banner-padding e-flex e-con e-parent\" data-id=\"95e9f7a\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-f5902a2 e-con-full banner-type-detail e-flex e-con e-child\" data-id=\"f5902a2\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-154ba09 elementor-widget elementor-widget-spacer\" data-id=\"154ba09\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-5b8a4e8 banner-content e-flex e-con-boxed e-con e-child\" data-id=\"5b8a4e8\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-3fab272 elementor-widget elementor-widget-spacer\" data-id=\"3fab272\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-45920eb elementor-widget elementor-widget-shortcode\" data-id=\"45920eb\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"shortcode.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-shortcode\"><div class=\"category-items-wrapper\"><div class=\"term-item\">Publications scientifiques<\/div><\/div><\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a704adb elementor-widget elementor-widget-heading\" data-id=\"a704adb\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">Analyse de la phase d'initiation des \u00e9clairs n\u00e9gatifs pr\u00e9sentant un arc en retour &gt;100 kA<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-dc07bcc elementor-widget elementor-widget-text-editor\" data-id=\"dc07bcc\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Cette \u00e9tude a \u00e9t\u00e9 publi\u00e9e lors de la 16\u00e8me International Conference on Atmospheric Electricity au Japon.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3db9832 elementor-widget elementor-widget-spacer\" data-id=\"3db9832\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4cfe41d elementor-align-center elementor-widget elementor-widget-ube-button\" data-id=\"4cfe41d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"ube-button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<a class=\"ube-btn btn btn-md btn- btn-link\" href=\"https:\/\/www.meteorage.com\/publications-et-notes-techniques\/\" id=\"return-link\">\n\t    <span class=\"ube-btn-text\">&lt; retour<\/span>\n\t<\/a>\n\n\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-dfe4633 e-flex e-con-boxed e-con e-parent\" data-id=\"dfe4633\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-d94074b elementor-widget elementor-widget-spacer\" data-id=\"d94074b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-d9058c6 e-flex e-con-boxed e-con e-parent\" data-id=\"d9058c6\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-0e5ac39 e-con-full e-flex e-con e-child\" data-id=\"0e5ac39\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-3f831d6 elementor-widget elementor-widget-image\" data-id=\"3f831d6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/www.meteorage.com\/wp-content\/uploads\/2024\/07\/ICAE2018_FullPaper.pdf\" target=\"_blank\">\n\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"660\" height=\"861\" src=\"https:\/\/www.meteorage.com\/wp-content\/uploads\/2018\/07\/ICAE-paper.png\" class=\"attachment-medium_large size-medium_large wp-image-24165\" alt=\"\" srcset=\"https:\/\/www.meteorage.com\/wp-content\/uploads\/2018\/07\/ICAE-paper.png 660w, https:\/\/www.meteorage.com\/wp-content\/uploads\/2018\/07\/ICAE-paper-230x300.png 230w, https:\/\/www.meteorage.com\/wp-content\/uploads\/2018\/07\/ICAE-paper-543x708.png 543w\" sizes=\"(max-width: 660px) 100vw, 660px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-c755742 e-con-full e-flex e-con e-child\" data-id=\"c755742\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-bb38dba e-con-full e-flex e-con e-child\" data-id=\"bb38dba\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-dad4495 elementor-widget elementor-widget-heading\" data-id=\"dad4495\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">R\u00e9sum\u00e9 (en anglais)<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b9de4f1 elementor-widget elementor-widget-text-editor\" data-id=\"b9de4f1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><strong>We examined the initial conditions leading to negative cloud-to-ground (-CG) flashes with a return stroke larger than 100 kA (absolute value), so called -CG<sub>&lt;-100kA\u00a0<\/sub>flashes.<\/strong><\/p><p>The dataset is made of 88 flashes observed during summer 2017 over Corsica in France by a Lightning Locating System (M\u00e9t\u00e9orage), a Lightning Mapping Array (SAETTA) and BLESKA, a broadband HF magnetic field analyzer.<\/p><p><strong>We found that -CG<sub>&lt;-100kA<\/sub>\u00a0flashes exhibited in average a vertical extent of 2730m and initiated at an altitude of 3720m, these values being far below those we recorded for -CG&gt;-100kA flashes, respectively 3600m and 5350m.<\/strong> In addition, -CG<sub>&lt;-100kA<\/sub>\u00a0flashes presented a short delay of about 2ms between the first preliminary breakdown pulse and the return stroke.<\/p><p>We concluded that <strong>-CG<sub>&lt;-100kA<\/sub>\u00a0flashes are mainly related to low base and top thunderclouds which combined with the elevated terrain in Corsica might enhance the vertical electric field and the electrical charges motion resulting in large return strokes. <\/strong><\/p><p>Finally, we noted that all the analyzed strokes were followed by a period ranging from 7ms to 98ms during which no VHF activity was detected by SAETTA, likely to be related to the continuing current phase.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2016488 elementor-align-center elementor-widget elementor-widget-button\" data-id=\"2016488\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-md\" href=\"https:\/\/www.meteorage.com\/wp-content\/uploads\/2024\/07\/ICAE2018_FullPaper.pdf\" target=\"_blank\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">T\u00e9l\u00e9chargez l'\u00e9tude (en anglais uniquement)<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-c1b4726 e-flex e-con-boxed e-con e-parent\" data-id=\"c1b4726\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-a70f389 elementor-widget elementor-widget-spacer\" data-id=\"a70f389\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-1922013 our-mission  e-flex e-con-boxed e-con e-parent\" data-id=\"1922013\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-49d9755 icon-text-links e-flex e-con-boxed e-con e-child\" data-id=\"49d9755\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-de3e8fd elementor-position-inline-start elementor-mobile-position-inline-start elementor-view-default elementor-widget elementor-widget-icon-box\" data-id=\"de3e8fd\" 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