Aerial photos

Aletschwald and tongue of Grosser Aletschgletscher. Upper left: bedrock failure caused by glacier recession.

Crevasse labyrinth on the tongue of Grosser Aletschgletscher.

Middle part of the glacier, looking towards Konkordiaplatz, Jungfrau, Mönch and Trugberg (top, from left to right).

Icefall below Ewigschneefäld, near Konkordiaplatz.

Small ice-dammed lake at the confluence of Ewigschneefäld and Jungfraufirn.

Small meltwater pond in the icefall below Ewigschneefäld (compare with next photo).

Small meltwater pond in the icefall; firn stratification is clearly visible on the left.

Konkordiaplatz, confluence of Ewigschneefäld and Jungfraufirn, formation of wave ogives.

Looking from Aletschfirn across Konkordiaplatz towards the icefall and Grüneggfirn (small glacier centre right).

Pattern of remnant snow from last winter (bright), older firn (dark), and crevasses on Aletschfirn.

Looking downglacier over Jungfraufirn towards Konkordiaplatz.

Uppermost part of Ewigschneefäld; the firn area in the foreground is part of Oberer Grindelwaldgletscher.