Career
The meteorological expedition 1882-1883 to Nuuk led by Adam Paulsen, The naturalist expedition to West Greenland with Eugenius Warming and Theo Holm in 1884 on the schooner Fylla J. A. Doctorate. Jensen"s 1885 expedition He led an expedition to the Upernavik Distrikt in 1886-1887 and, most famously, the 1891-1892 expedition to East Greenland by the vessel Hekla. The way north from Ittoqqortoormiit was effectively blocked by ice. Instead, Ryder made the first comprehensive mapping of the entire Scoresby Sund fjord system.