{"id":19917,"date":"2022-02-20T13:54:31","date_gmt":"2022-02-20T13:54:31","guid":{"rendered":"https:\/\/www.africa-press.net\/tchad\/politique\/comment-predire-une-avalanche-des-scientifiques-avancent-une-nouvelle-methode"},"modified":"2022-02-20T14:29:53","modified_gmt":"2022-02-20T14:29:53","slug":"comment-predire-une-avalanche-des-scientifiques-avancent-une-nouvelle-methode","status":"publish","type":"post","link":"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/comment-predire-une-avalanche-des-scientifiques-avancent-une-nouvelle-methode","title":{"rendered":"Comment pr\u00e9dire une avalanche? Des scientifiques avancent une nouvelle m\u00e9thode"},"content":{"rendered":"

Africa-Press – Tchad. <\/strong><\/span>Les avalanches \u00e0 venir pourraient \u00eatre pr\u00e9dites gr\u00e2ce \u00e0 une nouvelle m\u00e9thode \u00e9labor\u00e9e par un \u00e9quipe des scientifiques d\u2019une universit\u00e9 \u00e9cossaise et qui inclut l\u2019analyse de donn\u00e9es satellitaires et la mod\u00e9lisation, selon une \u00e9tude publi\u00e9e dans la revue Remote Sensing.<\/p>\n

Une \u00e9quipe de scientifiques de l\u2019universit\u00e9 \u00e9cossaise d\u2019Aberdeen a d\u00e9couvert que les restes d\u2019une avalanche de 2016 et les chutes de neige qui ont suivi pourraient avoir exacerb\u00e9 les effets de celle de 2021. Gr\u00e2ce \u00e0 des ensembles de donn\u00e9es satellitaires et \u00e0 la mod\u00e9lisation, le groupe a constat\u00e9 que le dernier ph\u00e9nom\u00e8ne avait parcouru pr\u00e8s de 13 kilom\u00e8tres, alors qu’elle \u00e9tait principalement constitu\u00e9e de roches.<\/p>\n

Qui plus est, les chercheurs ont d\u00e9tect\u00e9 des mouvements suspects \u00e0 la surface du glacier avant m\u00eame l’avalanche de 2016. Cela pourrait permettre \u00e0 de futures calculs, en analysant les donn\u00e9es satellitaires, de calculer le moment o\u00f9 le risque d’avalanche appara\u00eetra, a indiqu\u00e9 l\u2019universit\u00e9 sur son site. L\u2019\u00e9tude refl\u00e9tant cette supposition a \u00e9t\u00e9 publi\u00e9e dans la revue Remote Sensing.<\/p>\n

Cette technologie ouvre la possibilit\u00e9 de d\u00e9velopper un nouveau syst\u00e8me de surveillance qui pourrait s’av\u00e9rer tr\u00e8s utile pour prot\u00e9ger les zones montagneuses -tels l’Himalaya ou les Andes- qui sont d\u00e9j\u00e0 confront\u00e9es \u00e0 d’importants probl\u00e8mes dus au changement climatique.<\/p>\n

Difficult\u00e9s et risques<\/b><\/p>\n

Si les observations sur le terrain se sont av\u00e9r\u00e9es efficaces pour pr\u00e9voir les avalanches dans le pass\u00e9, les scientifiques affirment qu’elles sont difficiles \u00e0 r\u00e9aliser \u00e0 grande \u00e9chelle en raison des difficult\u00e9s et des risques associ\u00e9s au travail dans des zones montagneuses recul\u00e9es.<\/p>\n

Cependant, les recherches de l\u2019\u00e9quipe ont d\u00e9montr\u00e9 que la surveillance \u00e0 distance fond\u00e9e sur l’imagerie satellite pouvait couvrir efficacement de vastes zones pour surveiller les glaciers suspendus, avec la possibilit\u00e9 de pr\u00e9dire des avalanches importantes et dangereuses dans certains cas. Le groupe travaille maintenant avec des mod\u00e9lisateurs et d\u2019autres scientifiques pour \u00e9tudier diverses avalanches de glace \u00e0 l’\u00e9chelle mondiale, dans le but d’approfondir ses recherches.<\/p>\n

Selon le Service \u00e9cossais d\u2019information sur les avalanches (SAIS), 17 \u00e9pisodes de ce type au total se sont produits en \u00c9cosse au cours du seul mois de janvier 2022.<\/p>\n

Pour plus d’informations et d’analyses sur la Tchad<\/a>, suivez Africa-Press<\/a><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"

Africa-Press – Tchad. Les avalanches \u00e0 venir pourraient \u00eatre pr\u00e9dites gr\u00e2ce \u00e0 une nouvelle m\u00e9thode \u00e9labor\u00e9e par un \u00e9quipe des scientifiques d\u2019une universit\u00e9 \u00e9cossaise et qui inclut l\u2019analyse de donn\u00e9es satellitaires et la mod\u00e9lisation, selon une \u00e9tude publi\u00e9e dans la revue Remote Sensing. Une \u00e9quipe de scientifiques de l\u2019universit\u00e9 \u00e9cossaise d\u2019Aberdeen a d\u00e9couvert que les […]<\/p>\n","protected":false},"author":82,"featured_media":19916,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22,11,10],"tags":[37,292,29],"class_list":["post-19917","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-divers","category-homepage-french","category-toutes-les-actualites","tag-africa-press","tag-africa-press-tchad","tag-tchad"],"yoast_head":"\nComment pr\u00e9dire une avalanche? 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