Hans Wilhelmsson Ahlmann

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Hans Jakob Konrad Wilhelmsson Ahlmann (born November 14, 1889 in Karlsborg ; died March 10, 1974 in Stockholm ) was a Swedish geographer , glaciologist and diplomat .

Live and act

Ahlmann studied at Stockholm University and took part in a Spitsbergen expedition as assistant to Gerard De Geer in 1910 . In 1913 he moved to Paris - originally with the intention of becoming an artist. A lack of talent, but also the interest in the natural sciences regained by attending some lectures by the well-known geomorphologist William Morris Davis , led him back to Stockholm. There he wrote his dissertation on the geomorphology of Ragundasjön , a lake accidentally emptied by human intervention in 1796.

In the same year he was appointed Associate Professor of Geography at Stockholm University and in 1920 Associate Professor of Geography at Uppsala University. In 1929 he returned to Stockholm and received the newly created professorship for geography at the University of Stockholm, which he kept until 1950. During the Second World War he was a member of the Swedish-Norwegian Association and from 1950 to 1956 the Swedish Ambassador in Oslo.

His good contacts in Norway were established in the mid-1910s while studying glacial and post-glacial landscapes in the Jotunheimen Mountains and on the Kårsaglaciären (glacier in northern Sweden). In 1931 and 1934, together with Harald Ulrik Sverdrup, he explored the glaciers on Vestspitsbergen . In 1936 he examined the Vatnajökull in Iceland and in the winter of 1939/40 carried out the Swedish-Norwegian study on glaciers in Greenland. In 1946 he directed glacier research on Kebnekaise in Sweden. He was one of the initiators of the Norwegian-British-Swedish Antarctic Expedition 1949–1952.

Ahlmann studied climate changes in the Arctic and carried out a number of empirical observations. In doing so, he encountered the idea of ​​purely local polar warming and, with his results, initiated an international exchange of data from meteorology, oceanography and other relevant disciplines. During his last fifteen years, his interests were no longer primarily in glaciology , but more focused on geography in its old sense, on man's relationship to his environment, and on the survival of humanity in an overpopulated world.

Ahlmann was married to Erikka Maria Harloff (1897–1981) and had no children.

Honors and memberships

Namesake

Some geographical objects were named after Hans Wilhelmsson Ahlmann:

Publications (selection)

  • Glaciological research on the North Atlantic coasts . In: Royal Geographical Society Research Series , No. 1. Royal Geographical Society, London 1948
  • The contribution of polar expeditions to the science of glaciology . In: Polar Record , Vol. 5. Cambridge University Press, 1949, pp. 324-331
  • Preliminary glaciological plans for the Norwegian-British-Swedish Antarctic expedition, 1949-52 . In: Journal of Glaciology , Vol. 1. International Glaciological Society, 1949, pp. 286-289
  • Glacier variations and climate fluctuations . In: Bowman Memorial Lectures , Ser. 3. American Geographical Society, New York 1953

literature

  • Gunnar Hoppe, Valter Schytt: Memorial to Hans W. Ahlmann 1889–1974 . The Geological Society of America, 1974
  • Valter Schytt: Hans W: son Ahlmann — 1889–1974 . In: Journal of Glaciology , Vol. 13, No. 69. International Glaciological Society, 1974, pp. 541–542 ( Online , PDF)

Web links

Individual evidence

  1. ^ Hans W: son Ahlmann: Ragundasjöns geomorfologi . Norstedt, Stockholm 1915
  2. ↑ Carl M: son Mannerfelt: Glaciers and climate. Geophysical and geomorphological essays dedicated to Hans W: son Ahlmann . Svenska Säliskapet för Antropologi och Geografi, Stockholm 1949.
  3. ↑ Egede medals. Archived from the original on February 10, 2017 ; accessed on January 9, 2018 .
  4. ^ Hans (Hans, Jakob, Konrad) Ahlmann. Members of the predecessor academies. Berlin-Brandenburg Academy of Sciences , accessed on January 9, 2018 .
  5. ↑ Member entry by Hans Ahlmann at the German Academy of Natural Scientists Leopoldina , accessed on January 9, 2018.
  6. ↑ Medals and Awards. (PDF) Royal Geographical Society , accessed January 9, 2018 .
  7. ↑ a b c Staffan Helmfrid: Hans W: son Ahlmann 1889–1974 . In: Journal of Glacier Science and Glacial Geology . tape 10 , 1974, p. 249-257 .
  8. ↑ Sällskapets medaljörer. (PDF) Swedish Society for Anthropology and Geography , accessed January 10, 2018 .
  9. ↑ a b c Ouren Tore: Hans W: son Ahlmann November 14, 1889– March 10, 1974 . In: Norsk Geografisk Tidsskrift . tape 28 , no. 3 , 1974, p. 155–156 , doi : 10.1080 / 00291957408621929 (Norwegian).
  10. ↑ "The Cullum Geographical Medal. Archived from the original on September 9, 2015 ; accessed September 2, 2018 .
  11. ↑ Almanac . Volume 125. Verlag der Osterreichische Akademie der Wissenschaften, 1976, p. 459
  12. ^ History. International Geographical Union , accessed January 9, 2018 .
  13. ^ Negotiations of the Society for Geography in Berlin . In: The Earth . tape 90 , no. 3 , 1959, pp. 317-320 ( online ).
  14. ↑ Article Альман Ханс in the Great Soviet Encyclopedia (BSE) , 3rd edition 1969–1978 (Russian)http://vorlage_gse.test/1%3D028164~2a%3D%D0%90%D0%BB%D1%8C%D0%BC%D0%B0%D0%BD%20%D0%A5%D0%B0% D0% BD% D1% 81 ~ 2b% 3D% D0% 90% D0% BB% D1% 8C% D0% BC% D0% B0% D0% BD% 20% D0% A5% D0% B0% D0% BD% D1% 81
  15. ↑ Glenn M. Stein, Lydia I. Iarukova: Polar Honors of the Russian Geographical Society 1845-1995. (PDF) In: The Journal of the Hakluyt Society. December 2008, accessed January 10, 2018 .
personal data
SURNAME Ahlmann, Hans Wilhelmsson
ALTERNATIVE NAMES Ahlmann, Hans Jakob Konrad Wilhelmsson (full name); Ahlmann, Hans W .; Ahlmann, Hans W. son; Ahlmann, H. W: son; Ahlmann, Hans
BRIEF DESCRIPTION Swedish geographer, glaciologist and diplomat
DATE OF BIRTH November 14, 1889
PLACE OF BIRTH Karlsborg
DATE OF DEATH March 10, 1974
Place of death Stockholm