Jens Esmark

[3] In 1798, Esmark was the first person to ascend Snøhetta, highest in the mountain range Dovrefjell in southern Norway.

[4] The same year he led the first expedition to Bitihorn, a small mountain in the southernmost outskirts of Jotunheimen, Norway.

Professor Esmark theorized in 1824 that glaciers had once been larger and thicker and had covered much of Norway and the adjacent sea floor.

[7] On the island of Løvøya, Norway, his son, Hans Morten Thrane Esmark, found the first specimens of a black mineral, thorite, from which the element thorium is derived.

Jens Esmark’s Christiania (Oslo) meteorological observations 1816-1838: The first long term continuous temperature record from the Norwegian capital homogenized and analysed.