Temperature seasonality in the North American continental interior during the Early Eocene Climatic Optimum
-
Published:2018-10-04
Issue:10
Volume:14
Page:1391-1404
-
ISSN:1814-9332
-
Container-title:Climate of the Past
-
language:en
-
Short-container-title:Clim. Past
Author:
Hyland Ethan G.ORCID, Huntington Katharine W., Sheldon Nathan D.ORCID, Reichgelt TammoORCID
Abstract
Abstract. Paleogene greenhouse climate equability has long been a paradox in paleoclimate research. However, recent developments in proxy and modeling methods have suggested that strong seasonality may be a feature of at least some greenhouse Earth periods. Here we present the first multi-proxy record of seasonal temperatures during the Paleogene from paleofloras, paleosol geochemistry, and carbonate clumped isotope thermometry in the Green River Basin (Wyoming, USA). These combined temperature records allow for the reconstruction of past seasonality in the continental interior, which shows that temperatures were warmer in all seasons during the peak Early Eocene Climatic Optimum and that the mean annual range of temperatures was high, similar to the modern value ( ∼ 26 °C). Proxy data and downscaled Eocene regional climate model results suggest amplified seasonality during greenhouse events. Increased seasonality reconstructed for the early Eocene is similar in scope to the higher seasonal range predicted by downscaled climate model ensembles for future high-CO2 emissions scenarios. Overall, these data and model comparisons have substantial implications for understanding greenhouse climates in general, and may be important for predicting future seasonal climate regimes and their impacts in continental regions.
Funder
Division of Earth Sciences Geological Society of America
Publisher
Copernicus GmbH
Subject
Paleontology,Stratigraphy,Global and Planetary Change
Reference106 articles.
1. Bader, N. E., Nicolaysen, K. P., Maldonado, R. L., Murray, K. E., and Mudd, A. C.: Extensive middle Miocene weathering interpreted from a well-preserved paleosol, Cricket Flat, Oregon, USA, Geoderma, 239, 195–205, 2015. 2. Barron, E.: Eocene equator-to-pole surface ocean temperatures: A significant climate problem?, Paleoceanography, 2, 729–739, 1987. 3. Brand, W. A., Assonov, S. S., and Coplen, T. B.: Correction for the 17O interference in δ13C measurements when analyzing CO2 with stable isotope mass spectrometry, Pure Appl. Chem., 82, 1719–1733, 2010. 4. Breecker, D. O., Sharp, Z. D., and McFadden, L. D.: Seasonal bias in the formation and stable isotopic composition of pedogenic carbonate in modern soils from central New Mexico, USA, Geol. Soc. Am. Bull., 121, 630–640, 2009. 5. Burgener, L., Huntington, K., Hoke, G., Schauer, A., Ringham, M., Latorre, C., and Diaz, F.: Variations in soil carbonate formation and seasonal bias over > 4 km of relief in the western Andes (30° S) revealed by clumped isotope thermometry, Earth Planet. Sc. Lett., 441, 188–199, 2016.
Cited by
26 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献
|
|