Keywords
Drivhuseffekt
Klimahistorie
How to Cite
Abstract
Christian Bjerrum analyserer Eocæns drivhusklima og diskuterer, hvorfor nutidige koblede ocean-atmosfære-modeller har vanskeligt ved at reproducere de høje breddegraders temperaturer ved forhøjede CO₂-niveauer. Med afsæt i geologiske klimaindikatorer – herunder isotopdata og fossile spor – problematiseres vores forståelse af klimafølsomhed og feedbackmekanismer. Artiklen rejser det centrale spørgsmål: Mangler modellerne afgørende fysik, eksempelvis i skydannelse og varmetransport? Konsekvenserne er ikke blot videnskabelige, men også politiske. En tankevækkende og stringent gennemgang, der udfordrer læserens intuition om drivhuseffektens lineære skala.
References
[1] Parrish, J. T. (1998), Interpreting Pre-Quaternary Climate from the Geologic Record, Columbia University Press.
[2] Skelton, P. (editor) (2003), The Cretaceous World, Cambridge Univ. Press.
[3] Zachos, J.,et al. (2001), Trends, Rhythms, and Aberrations in Global Climate 65 Ma to Present, Science v. 292, s. 686-693.
https://doi.org/10.1126/science.1059412
[4] Retallack, G. J. (2001), A 300-million-year record of atmospheric carbon dioxide from fossil plant cuticles, Nature v. 411, s. 287-290.
https://doi.org/10.1038/35077041
[5] Royer, D. L., et al. (2001), Paleobotanical E-vidence for Near Present-Day Levels of Atmospheric CO2 During Part of the Tertiary, Science v. 292, p. 2310-2313.
https://doi.org/10.1126/science.292.5525.2310
[6] Huber, M. og Sloan, L. (2001), Heat transport, deep waters, and thermal gradients: Coupled simulation of an Eocene Greenhouse Climate, Geophysical Res. Let. v. 28, p. 3481-3484. [7] www.ngdc.noaa.gov/paleo/education.html
https://doi.org/10.1029/2001GL012943
[8] Olsen, S. M., Shaffer, G., and Bjerrum, C. J., in press. Ocean oxygen isotope constraints on mechanisms for millennial-scale climate variability. Paleoceanography.
Counting from volume 37 (2026 -), articles published are licensed under Creative Commons Attribution-NonCommercial CC BY-NC 4.0.
Articles in volume 1-36 (1990 - 2025) are not licensed under Creative Commons. In these volumes, all rights are reserved to the authors of the articles respectively.