Henrik Svensmark

from Wikipedia, the free encyclopedia

Henrik Svensmark (* 1958 ) is a Danish physicist and climate researcher .

Henrik Svensmark

Live and act

From 1988 to 1993 he worked at the University of California, Berkeley , the Nordic Institute of Theoretical Physics and the Niels Bohr Institute , after which he worked at the Danish Meteorological Institute. Svensmark became known together with Eigil Friis-Christensen in 1997 through their work on a connection between cosmic rays (GCR) and climate change . They presented the postulated mechanism as cosmoclimatology : Increasing solar activity causes a decrease in cosmic radiation via solar magnetic fields within the magnetosphere . This would result in fewer cooling clouds in the lower atmosphere . Some earlier work on the thesis of a connection between cosmic rays and clouds was reviewed by Robert E. Dickinson in the 1975s.

Svensmark, who initially expressed himself very cautiously about a connection between cosmic radiation and the climate and initially reacted very negatively to any "appropriation" of his thesis in the political controversy about global warming , became internationally known in connection with his positioning as a climate skeptic . Later he deepened his engagement with scientists who follow the scientific consensus view of man-made global warming. In 2007, Svensmark denied a continuous current warming in a reply to an opposing study. He deepened his hypothesis that cosmic radiation is far more important for the climate than greenhouse gases and presented it to the British House of Lords in 2018 . His results and conclusions could not be confirmed by other scientists.

Between 1998 and 2004 he headed the Sun-climate group at the Danish Space Research Institute (DSRI). Since 2004 he has been director of the Center for Sun-Climate Research of the Danish National Space Center (DNSC), which was merged in 2007 with parts of Denmark's Technical University (DTU) to form the National Space Institute (NSI or DTU Space).

In 2017 he appeared as a guest speaker at a “climate conference” in Düsseldorf, organized by the two climate denial organizations EIKE and CFACT .

Role in the climate debate and further research

In a study published by the Royal Astronomical Society in 2012, Svensmark postulated a clear connection between biodiversity, plate tectonics, in particular their influence on the extent of coastal areas and the number of supernovae in the vicinity of the earth over the last 500 million years. The primary bioproductivity of the sea and the net growth of photosynthetically active bacteria can be explained solely by cosmic radiation. In addition, an inverse relationship can be found between increased supernovae phenomena and the carbon dioxide content of the atmosphere, which Svensmark attributes to increased bioproductivity in colder ocean areas.

Investigations into Svensmark's theses take place, among others, within the framework of the project called CLOUD (Cosmics Leaving OUtdoor Droplets), which was started at CERN in 2006 , under the direction of Jasper Kirkby and were also examined by Svensmark during the Danish SKY project. An overview study of research and findings on the relationship between cosmic rays and climate was published in 2007 by Space Science Reviews.

In simulations and experiments in cloud chambers, Svensmark found the mechanisms of action for cloud formation confirmed in a paper published in 2017. This could explain temperature fluctuations of up to 2 degrees in the past, which are dependent on solar activity or on supernova events in the vicinity of the earth and act on very large time scales. In science, this new paper was largely rejected. A work published in 2018 explicitly points out that Svensmark's postulated connection between supernova explosions and earthly climate is a “controversial claim”.

criticism

According to Urs Neu from the Swiss Forum for Climate Change , the theory of the influence of cosmic rays on climate change has been used by people who deny the influence of humans on climate change. In a 2010 study by Calogovic et al. the mechanisms of action postulated by Svensmark could not be understood. Another study by Laken et al. , also from 2010, assumes a smaller but statistically significant relationship between the fluence of cosmic rays (GCR-Flux, English galactic cosmic ray - Flux) and the cloud cover of medium latitude. The authors see a paleoclimatological influence, but describe the connection between GCR and the climate as "highly uncertain".

Publications and mentions

  • In 2007, together with the English science author Nigel Calder, he published the book The Chilling Stars - A New Theory of Climate Change ( see below ), which very emphatically represents the thesis - popular science. The contents of this book, such as the argumentation, are being sharply attacked from various sides.
Nigel Calder, Henrik Svensmark, Helmut Böttiger (translator): Stars control our climate: a new theory on global warming. Patmos Verlag, Düsseldorf 2008, ISBN 3-491-36012-9 .
  • The Cloud Mystery ( The Secret of the clouds ) by Lars Oxfeldt Mortensen is a documentary about Sven Marks work that the Danish station TV2 in 2008 and the station ARTE 2010-2013 aired repeatedly.
  • In the book The Cold Sun. Why the climate catastrophe does not take place by Fritz Vahrenholt and Sebastian Lüning , he wrote a guest article.
  • Technical article "Increased ionization supports growth of aerosols into cloud condensation nuclei"

See also

Web links

Individual evidence

  1. ↑ Urs Neu: Claim: "Cosmic radiation causes climate change". November 3, 2015, accessed August 15, 2019 .
  2. ↑ Cosmoclimatology: a new theory emerges . In: Astronomy & Geophysics . tape 48 , 2007, p. 1.18-1.24 , doi : 10.1111 / j.1468-4004.2007.48118.x .
  3. ^ Robert E. Dickinson , Solar variability and the lower atmosphere , Bulletin of the American Meteorological Society 56, 1975, doi : 10.1175 / 1520-0477 (1975) 056 <1240: SVATLA> 2.0.CO; 2 (free full text).
  4. ^ H. Svensmark: Influence of Cosmic Rays on Earth's Climate . In: Phys. Rev. Lett. tape 81 , 1998, pp. 5027 , doi : 10.1103 / PhysRevLett.81.5027 .
  5. ^ Svensmark, H. and Friis-Christensen, E .: Reply to Lockwood and Fröhlich - The persistent role of the Sun in climate forcing. Danish National Space Center Scientific Report 3/2007
  6. ↑ Henrik Svensmark: Cosmic rays, clouds and climate . In: Europhysics News . tape 46 , no. 2 , 2015, p. 26–29 , doi : 10.1051 / epn / 2015204 ( dtu.dk [PDF]).
  7. ^ Svensmark Sr & Jr: The Connection Between Cosmic Rays, Clouds and Climate. Global Warming Policy Foundation, March 17, 2018, accessed August 17, 2019 .
  8. ^ Benjamin A. Laken, Enric Pallé, Jaša Calogovic, Eimear M. Dunne: A cosmic ray-climate link and cloud observations . In: J. Space Weather Space Clim. tape 2 , 2012, p. A18 , doi : 10.1051 / swsc / 2012018 (English, swsc-journal.org [PDF]).
  9. ↑ 'Cosmoclimatology' - tired old arguments in new clothes. In: realclimate.org. March 9, 2007, accessed April 20, 2019 .
  10. ↑ IPCC: Climate Change 2013: The Physical Science Basis . Contribution of Working Group I to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change. Ed .: Stocker, TF, D. Qin, G.-K. Plattner, M. Tignor, SK Allen, J. Boschung, A. Nauels, Y. Xia, V. Bex and PM Midgley. Cambridge University Press, 2013, p. 613ff ( ipcc.ch [PDF; 336.0 MB ]).
  11. ↑ CFACT co-sponsors climate and energy conference with EIKE . CFACT website . Retrieved March 17, 2018.
  12. ↑ a b c d Evidence of nearby supernovae affecting life on Earth , by Henrik Svensmark Mon. Not. R. Astron. Soc. 000, 000-000 (0000) April 22, 2012
  13. ^ Lawrence Solomon: The sun moves climate change . In: National Post , February 2, 2007. The Deniers, Part VI. Archived from the original on August 27, 2007. Retrieved September 19, 2007. 
  14. ↑ CLOUD Project Documents . Retrieved November 25, 2008.
  15. ↑ Kirkby, Jasper: 2009 PROGRESS REPORT ON PS215 / CLOUD. The CLOUD Collaboration, CERN, Geneva, SPS and PS Experiments Committee, CERN-SPSC-2010-013, April 7, 2010 ( PDF )
  16. ↑ Experimental setup of the SKY experiment at the National Space Institute in Copenhagen. ( Memento from February 24, 2013 in the Internet Archive ) DTU Space 2009
  17. ↑ K. Scherer et al .: Interstellar-Terrestrial Relations: Variable Cosmic Environments, the dynamic heliosphere, and their Imprints on terrestrial archives and Climate. Space Science Reviews (2006), Springer 2007, doi: 10.1007 / s11214-006-9126-6
  18. ↑ H. Sven Mark, MB Enghoff, NJ Shaviv, J. Mark Sven: Increased ionization supports growth of aerosols into cloud condensation nuclei . In: Nature Communications . tape 8 , no. December 1 , 2017, ISSN  2041-1723 , doi : 10.1038 / s41467-017-02082-2 ( nature.com [accessed June 11, 2019]).
  19. ↑ Cosmic ray theory of global warming gets cold response . In: Cosmos Magazine , December 22, 2017. Retrieved June 11, 2019.
  20. ↑ No, Supernovae Aren't Changing Earth's Climate . In: Gizmodo , December 19, 2017. Retrieved June 11, 2019.
  21. ↑ Adrian L. Melott et al .: Hypothesis: Muon Radiation Dose and Marine Megafaunal Extinction at the end-Pliocene supernova . In: Astrobiology . 2018, doi : 10.1089 / ast.2018.1902 .
  22. ↑ Climate change: will the solution come from space? Researchers from the European Organization for Nuclear Research (CERN) in Geneva are studying how cosmic rays can affect the environment, swissinfo, Scott Capper, Geneva, November 14, 2006
  23. ↑ Calogovic, J., C. Albert, F. Arnold, J. Beer, L. Desorgher, and EO Flueckiger (2010): Sudden cosmic ray decreases: No change of global cloud cover , Geophysical Research Letters, 37, L03802, doi : 10.1029 / 2009GL041327 ( PDF )
  24. ↑ Laken, BA, Kniveton, DR, Frogley, MR, (2010) Cosmic rays linked to rapid mid-latitude cloud changes , Atmospheric Chemistry and Physics, 10, 10941-10948, 2010 ( PDF )
  25. ↑ Clouding the issue of climate. Review by Garvin Schmidt on physicsworld.com 2007 (registration required)
  26. ↑ Cosmoclimatology - tired old arguments in new clothes. Posted on Realclimate.org 2007, accessed March 10, 2012
  27. ↑ ARTE DOCUMENTATION: The secret of the clouds. arte.tv, April 1, 2010, accessed April 20, 2019 .
  28. ↑ The Secret of the Clouds. In: ard.de. Retrieved April 20, 2019 .
  29. ↑ The Secret of the Clouds. Accessed April 20, 2019 (complete documentation on YouTube).
  30. ↑ Fritz Vahrenholt , Sebastian Lüning : The cold sun. Why the climate catastrophe does not take place. Hoffmann and Campe, Hamburg 2012, ISBN 3-455-50250-4 .
  31. ↑ J. Svensmark, NJ Shaviv, MB Enghoff, NJ Shaviv, H. Svensmark: Increased ionization supports growth of aerosols into cloud condensation nuclei . In: Nature Communications . tape 8 , no. 1 , December 19, 2017, ISSN  2041-1723 , p. 2199 , doi : 10.1038 / s41467-017-02082-2 , PMID 29259163 , PMC 5736571 (free full text) - ( nature.com [accessed June 10, 2019]).
personal data
SURNAME Svensmark, Henrik
BRIEF DESCRIPTION Danish physicist and climate researcher
DATE OF BIRTH 1958