Henrik Mohn

Henrik Mohn studied at University of Oslo and Bergen Cathedral School. The recorded working language is Norwegian. Employment is recorded with University of Oslo and Norwegian Meteorological Institute. Distinctions recorded are Fridtjof Nansen Award of Excellence, Mathematics-Natural sciences class, Knight Grand Officer of the Order of Saint Olav, honorary doctor of the University of Uppsala and honorary member of the Physics Association (Frankfurt am Main, Germany).

• Born — 15 May 1835 • Birthplace — Bergen, Norway • Died — 12 September 1916 • Place of death — Christiania, Norway • Fields — astronomy meteorology • Workplaces — Royal Frederick University Norwegian Meteorological Institute • Education — Royal Frederick University • Notable Works — Om Vind og Veir. Meteorologiens Hovedresultater Études sur les mouvements de l'atmosphère

He was born in Bergen as the son of Albert Henrik Mohn and Ida Neumann. He was a brother of Jakob and Emanuel Mohn. On the maternal side, he was a grandson of bishop Jacob Neumann. He was married twice. In December 1863 he married Louise Nicoline Rieck. After she died, he married Julie Birgitte Dyblie in July 1871. He was a granduncle of Frank and Albert Henrik Mohn, and his niece Hanna married physician and politician Nils Yngvar Ustvedt.

• Illustration — 48 hours time span volcanic ash distribution from Iceland to Scandinavia in 1875 (H. Mohn, 1877) He finished his secondary education at Bergen Cathedral School in 1852, and then enrolled at the Royal Frederick University. He originally studied theology, then switched to physics after attending lectures in that subject. He continued to study astronomy and mineralogy, graduating in the latter subject in 1858. To facilitate learning, he built his own telescope. In 1860 he was hired as a research fellow of astronomy, having delivered an esteemed paper on the orbits of comets in the same year. In 1861, when long-time professor Christopher Hansteen retired from an active academic career, Mohn became the new manager of the city astronomical observatory. In this position, he soon became interested in meteorology. His first article in the field, Stormene i Christiania fra 1837 til 1863 was published in 1863 in the journal Polyteknisk Tidsskrift, which he had edited from 1859 to 1862. He helped found the Norwegian Meteorological Institute in 1866, and became its director from the start. At the same time he was appointed as a professor at the Royal Frederick University. One of his more important works, Om Vind og Veir. Meteorologiens Hovedresultater, was published in 1872 and translated into seven languages. His main work was Études sur les mouvements de l'atmosphère, written between 1876 and 1880 together with mathematician Cato Maximilian Guldberg. In it, they used hydrodynamics and thermodynamics to describe and explain meteorological phenomena. Mohn had participated in the North Sea Expedition from 1876 to 1878. In addition to conducting research, he took up an interest he had pursued in his youth: amateur painting. A painting of the island Jan Mayen was later used for a 1957 stamp issued in Norway. In his later career, Mohn published annual climate tables. He published a climate atlas in 1916, after he retired from his positions at the university and the Meteorological Institute in 1913.