The Unteraargletscher (), literally "Lower Aare-Glacier", is the larger of the two sources of the Aare river in the Bernese Alps. It emerges from the association of the Finsteraargletscher (near the Finsteraarhorn) and the Lauteraargletscher (near the Lauteraarhorn) and flows for about to the east down to the Grimselsee near the Grimsel Pass. In total the glacier was long and in area in 1973. Its lower end is (or was) almost 400 metres lower than that of the neighbouring Oberaargletscher. In 18th and 19th centuries, it was one of the first subjects of developing glaciology. See also List of glaciers in Switzerland List of glaciers Retreat of glaciers since 1850 Swiss Alps Rhône Glacier External links Swiss glacier monitoring network "Viatimages", Université de Lausanne/Bibliothéque nationale Suisse Carte du Glacier inférieur de l'Aar, levée en 1842, d'après les directions de m.Agassiz par Jean Wild, Ingénieur (Neuchâtel Public and University Library, cote: IGH Txt 129.6.3) Réseau trigonométrique de la carte du glacier inférieur de l'Aar (1847) (Neuchâtel Public and University Library, cote: IGH Txt 129.6.3) Carte du glacier inférieur de l'Aar (1844) (Neuchâtel Public and University Library, cote: BPUN Q 820 A) Unteraargletscher in the Topographic Atlas of Switzerland 1870–1922 Glaciers of the canton of Bern Glaciers of the Alps Aare GUnteraar