Les balades sur les glaciers Bogdanovich et Manshuk Mametova des 8 et 9 août m’auront permis de découvrir l’état des glaciers du massif Trans-Ili Alatau, située juste au sud d’Almaty aux confins occidentaux du massif Tian Shan :
http://deprovenceetdailleurs.net/2024/08/glacier-bogdanovich-1.html
http://deprovenceetdailleurs.net/2024/08/manshuk-mametova-9.html
Des glaciers à vif parfois jusqu’à leurs rimayes sommitales, des lacs proglaciaires récemment formés et déjà en vidange forcée pour éviter un accident du type Glacier de Tête Rousse, des glaciers indiqués sur les cartes déjà fondus ou réduits à l’état de glaciers noirs, font penser à une fonte rapide et importante, comparable voire pire à ce que l’on connaît dans les Alpes. Les premiers névés ne sont généralement visibles qu’à plus de 4000/4200 mètres versant nord en ce début août, et font penser à une ligne d’équilibre largement située au-dessus de 4200 mètres, laissant croire à une disparition rapide de tous les glaciers (et ils sont nombreux…) aux bassins d’accumulation situés sous cette altitude.
Une catastrophe à venir pour l’alimentation estivale en eau de cette région semi-aride, pour ce piémont vert et cultivé, pour cette agglomération d’Almaty de près de 2 millions d’habitants encore en croissance rapide, et pour ces lacs endoréiques propres à l’Asie centrale. Et ici, inutile d’espérer dessaler de l’eau de mer !
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