2011/06/16 by Matthew Huber, Rodrigo Caballero · 7 citations
Earth and Planetary Sciences · #Evolution and Paleontology Studies #Geology and Paleoclimatology Research #Paleontology and Stratigraphy of Fossils
paper · pdf · doi:10.5194/cp-7-603-2011
openalex publication_date 2011/06/16 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
Abstract. The early Eocene "equable climate problem", i.e. warm extratropical annual mean and above-freezing winter temperatures evidenced by proxy records, has remained as one of the great unsolved problems in paleoclimate. Recent progress in modeling and in paleoclimate proxy development provides an opportunity to revisit this problem to ascertain if the current generation of models can reproduce the past climate features without extensive modification. Here we have compiled early Eocene terrestrial temperature data and compared with climate model results using a consistent and rigorous methodology. We test the hypothesis that equable climates can be explained simply as a response to increased greenhouse gas forcing within the framework of the atmospheric component of the Community Climate System Model (version 3), a climate model in common use for predicting future climate change. We find that, with suitably large radiative forcing, the model and data are in general agreement for annual mean and cold month mean temperatures, and that the pattern of high latitude amplification recorded by proxies can be largely, but not perfectly, reproduced.