Knut Ångström
This article includes a list of general references, but it lacks sufficient corresponding inline citations. (March 2012) |
Knut Johan Ångström | |
---|---|
Björkénska priset (1905) | |
Scientific career | |
Fields | Physics |
Institutions | Uppsala University |
Knut Johan Ångström (12 January 1857 – 4 March 1910) was a
He focused his research work on investigating the radiation of heat from the sun,[2] terrestrial nocturnal emission and its absorption by the Earth's atmosphere,[3] and to that end devised various delicate[clarification needed] methods and instruments, including his electric compensation pyrheliometer,[4] invented in 1893, apparatus for obtaining a photographic representation of the infra-red spectrum (1895)[5] and pyrgeometer[6] (abt. 1905).
In 1900, Herr J. Koch, laboratory assistant to Knut Ångström, did not observe any appreciable change in the absorption of infrared radiation by decreasing the concentration of CO2 up to a third of the initial amount.[7] This result, in addition to the observation made a couple of years before that the superposition of the water vapour absorption bands,[8] more abundant in the atmosphere, over those of CO2, convinced some geologists for a time that calculations by Svante Arrhenius for CO2 warming were wrong; though subsequent work in following decades eventually vindicated Arrhenius.[9][10]
The experiment, however, was careless seen from the current perspective with erroneous result[11] but of a historical significance in the development of the theory of the greenhouse effect amplified by CO2.
He was elected a member of the Royal Swedish Academy of Sciences in 1893.
References
- ^ Chisholm 1911.
- .
- PMID 16576466.
- ^ Nilsson, Åke. "Knut Ångström - Gustavianum - Uppsala University, Sweden". gustavianum.uu.se. Retrieved 2019-02-09.
- ^ public domain: Chisholm, Hugh, ed. (1911). "Angström, Anders Jonas s.v. Knut Johan Ångström". Encyclopædia Britannica. Vol. 2 (11th ed.). Cambridge University Press. p. 42. One or more of the preceding sentences incorporates text from a publication now in the
- ^ Interview With Dr Anders K. Ångström (Knut's son), WMO Bulletin 1982 "an excellent opportunity for me to use my father's radiation instruments, the pyrheliometer and the instrument for measuring outgoing nocturnal radiation to which I had already given the name pyrgeometer"
- .
- ISSN 0004-637X.
- ^ "The Carbon Dioxide Greenhouse Effect". history.aip.org. Retrieved 2019-02-09.
- .
- ^ "A Saturated Gassy Argument". RealClimate (in German). Retrieved 2019-02-09.
- Ångström K, 1900, "Ueber die Bedeutung des Wasserdampfes und der Kohlensäure bei der Absorption der Erdatmosphäre", Annalen der Physik Bd 3. 1900, p720-732. http://www.realclimate.org/images/Angstrom.pdf
External links
- Olof Beckman, Anders Jonas and Knut Ångström (in Swedish)