Jan Veizer
Jan Veizer | |
|---|---|
| Born | 22 June 1941 |
| Nationality | Slovakian |
| Scientific career | |
| Fields | Geochemistry |
| Institutions | University of Ottawa |
Ján Veizer (born 22 June 1941) is the Distinguished University Professor (
geochemist; his research interests have included the use of chemical and isotopic techniques in determining Earth's climatic and environmental
history.
Born in
Gottfried Wilhelm Leibniz Prize, which carried a 1.55 million euro value, awarded for understanding of the geochemistry of sediments; the 1995 Logan Medal which is the Geological Association of Canada's highest honour;[2] the 2000 Bancroft Award
for contributions furthering the public understanding of the Earth sciences.
Cosmic rays and climate change
In a letter to Nature, Veizer et al.(2000), compared the reconstruction of tropical sea surface temperatures throughout the Phanerozoic eon (the past ~550 Myr) with the variable galactic cosmic rays and concluded that their results can be reconciled if atmospheric carbon dioxide concentrations were not the principal driver of climate variability on geological timescales for at least one-third of the Phanerozoic eon, or if the reconstructed carbon dioxide concentrations are not reliable.[3]
In 2003, together with
GSA Today suggesting a reduced (capped) influence of carbon dioxide to climate change and attributing a more significant influence to cosmic rays.[4] Veizer and Shaviv commented that their model on a doubled carbon dioxide content in the last century would result in a warming of 1.5 °C, according to Veizer and Shaviv in line with the minimum level of the IPCC estimate between 1.5 and 4.5 °C.[5]
However, the paper was criticized by a subsequent publication in 2004 by
), in which the authors wrote, "The correlation of CRF [cosmic ray flux] and climate over the past 520 m.y. appears to not hold up under scrutiny".[6]Selected publications
- Veizer, Ján; Hoefs, Jochen (1976). "The nature of O18/O16 and C13/C12 secular trends in sedimentary carbonate rocks". Geochimica et Cosmochimica Acta. 40 (11). Elsevier BV: 1387–1395. ISSN 0016-7037.
- Veizer, Ján; Jansen, Siegfried L. (1979). "Basement and Sedimentary Recycling and Continental Evolution". The Journal of Geology. 87 (4). University of Chicago Press: 341–370. S2CID 140673989.
- Uwe Brand (2), Jan Veizer (1980). "Chemical Diagenesis of a Multicomponent Carbonate System--1: Trace Elements". SEPM Journal of Sedimentary Research. 50. Society for Sedimentary Geology. ISSN 1527-1404.)
{{cite journal}}: CS1 maint: numeric names: authors list (link - Veizer, Ján (31 December 1983). "Chapter 8. TRACE ELEMENTS and ISOTOPES in SEDIMENTARY CARBONATES". Carbonates. De Gruyter. pp. 265–300. ISBN 9781501508134.
- Veizer, Ján; Ala, Davin; Azmy, Karem; Bruckschen, Peter; Buhl, Dieter; Bruhn, Frank; Carden, Giles A.F.; Diener, Andreas; Ebneth, Stefan; Godderis, Yves; Jasper, Torsten; Korte, Christoph; Pawellek, Frank; Podlaha, Olaf G.; Strauss, Harald (1999). "87Sr/86Sr, δ13C and δ18O evolution of Phanerozoic seawater". Chemical Geology. 161 (1–3). Elsevier BV: 59–88. ISSN 0009-2541.
- Veizer, Ján; Godderis, Yves; François, Louis M. (2000). "Evidence for decoupling of atmospheric CO2 and global climate during the Phanerozoic eon". Nature. 408 (6813). Springer Science and Business Media LLC: 698–701. S2CID 4372892.
- Veizer, J. (2005). Celestial climate driver: a perspective from four billion years of the carbon cycle. Geoscience Canada, 32, 13-28.
- Ferguson, Paul R.; Veizer, Ján (20 December 2007). "Coupling of water and carbon fluxes via the terrestrial biosphere and its significance to the Earth's climate system". Journal of Geophysical Research. 112 (D24). American Geophysical Union (AGU). ISSN 0148-0227.
- Korte, Christoph; Jones, Peter J.; Brand, Uwe; Mertmann, Dorothee; Veizer, Ján (2008). "Oxygen isotope values from high-latitudes: Clues for Permian sea-surface temperature gradients and Late Palaeozoic deglaciation". Palaeogeography, Palaeoclimatology, Palaeoecology. 269 (1–2). Elsevier BV: 1–16. ISSN 0031-0182.
- Scherer, K.; Fichtner, H.; Borrmann, T.; Beer, J.; Desorgher, L.; Flükiger, E.; Fahr, H.-J.; Ferreira, S. E. S.; Langner, U. W.; Potgieter, M. S.; Heber, B.; Masarik, J.; Shaviv, N.; Veizer, J. (31 January 2007). "Interstellar-Terrestrial Relations: Variable Cosmic Environments, The Dynamic Heliosphere, and Their Imprints on Terrestrial Archives and Climate". Space Science Reviews. 127 (1–4). Springer Science and Business Media LLC: 327–465. S2CID 119640116.
References
- ^ "Jan Veizer". mysite.science.uottawa.ca. 15 January 2007. Retrieved 17 December 2021.
- ^ "Geological Association of Canada – Medals and Awards". 2 October 2006. Archived from the original on 2 October 2006. Retrieved 16 December 2021.
- S2CID 4372892.
- Nir J. Shaviv, Ján Veizer: Celestial driver of Phanerozoic climate?, 2003, pp. 4–10, Geological Society of America,
- ^ "Schlagabtausch über die Ursachen des Treibhauseffekts". Informationsdienst Wissenschaft, Nachrichten, Termine, Experten.
- .
External links
- Jan Veizer, University of Ottawa
- Climate History Christopher Scotese Display of ancient climates on Paleomap Project
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