Le 4 août 2018
Première journée d’une petite semaine en Haute-Savoie, avec une courte randonnée dans les contreforts des rochers de Leschaux vers la glacière de Solaison. Un sentier à travers alpages puis forêt d’épicéas et myrtilles mène rapidement à une profonde cavité à la base des falaises nord du rocher de Leschaux. On sent d’abord le courant d’air froid qui s’échappe du trou puis aperçoit à quelques mètres de profondeur le névé qui l’obstrue, une vision et une température insolites à 1500 mètres d’altitude en pleine canicule estivale. Le gros névé qui encombre le trou entretient en fait un véritable micro-climat, jusqu’à couvrir les parois du trou de glace de regel par les 25°C ambiants ! Une belle découverte que cette oasis de fraîcheur voire de froidure à quelques kilomètres à vol d’oiseau de la plaine genevoise surchauffée en ce mois d’août !
le trou et son névé permanent, surprenant à 1500 m d'altitude !
cueuillette de myrtilles au passage !
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