Journal
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
Volume 628, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.palaeo.2023.111762
Keywords
Cenozoic; Climate reconstruction; Fossils; Palaeoclimate; Paleogene
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By quantifying terrestrial temperature data using a plant proxy approach, this study reveals that the climate near the palaeo-equator during the early Eocene was warmer than in mid- to high latitudes. The research also suggests that high rainfall levels near the palaeo-equator might have contributed to the resilience of tropical rainforests during the warm greenhouse world of the Early Eocene Climatic Optimum.
The rainforests near the early Eocene palaeo-equator were more resilient to greenhouse warming than midlatitude vegetation. The mechanism underlying that resilience remains poorly known due to the lack of reliable terrestrial climate data from the palaeo-equator. In this paper, we quantify terrestrial temperature data using a plant proxy approach and infer that early Eocene climate near the palaeo-equator (-2.6 degrees N) was warmer than in mid- to high palaeolatitudes. The data also suggest that high levels of rainfall near the palaeo-equator might have afforded greater resilience to tropical rainforests by increasing the water use efficiency of trees during the warm greenhouse world of the Early Eocene Climatic Optimum.
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