From May to November 1898, he participated in a geological expedition headed by
K. J. V. Steenstrup (1842-1906) to the
Disko Bay region at the west coast of Greenland. From this expedition Moltke made paintings of geological structures, a.o., the coast line of Nugsuark Peninsula, and of the
Inuit, a.o., "Greenland women in
umiak". During July 1899 to April 1900, Moltke joined an aurora expedition to
Akureyri in
Iceland. The expedition was arranged and headed by the director, Adam F. W. Paulsen (1833-1907), of the
Danish Meteorological Institute (DMI). Further participants were Dan Barfod la Cour (1876-1942), director of DMI 1923–1942, and Ivar B. Jantzen (1875–1961). In Akureyri, Moltke made 19 paintings of auroras and 5 portrait sketches of the expedition members. In the winter 1900–1901, Moltke participated in another DMI aurora expedition; this time to
Utsjoki in northern
Finland. This expedition was headed by Dan B. la Cour. Further participants were Carl Edvard Thune Middelboe (1875-1924) and Johannes K. Kofoed (1877–1939). Here, Moltke made, a.o., 6 paintings of auroras. The aurora paintings from the two aurora expedition belong to and reside now with the
Danish Meteorological Institute. From 1907 to 1908, he was employed at the
Royal Copenhagen porcelain factory and from 1908 to 1914 for the porcelain factory
Bing & Grondahl. During the later years of his life, Moltke made numerous paintings, particularly portraits and landscapes, and published his memoirs in two volumes:
Livsrejsen (1936) and
Den lykkelige Rejse (1941). ==Personal life==