首页|A transient shift in equatorial hydrology and vegetation during the Eocene Thermal Maximum 2
A transient shift in equatorial hydrology and vegetation during the Eocene Thermal Maximum 2
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The equatorial evergreen forests nourish the world's biodiversity hotspots and are considered the lungs of the Earth.However,their future survival is uncertain,due to anthropogenically increased carbon emis-sions and changes in the hydrological cycle.Understanding the changes in the hydrological cycle in the equatorial region due to an increase in carbon emission is of prime importance.The early Paleogene hyperthermal events are potential analogs to understand the consequences of high carbon emission on the hydrological cycle.In this communication,we quantify the terrestrial seasonal climate using the plant proxy and infer that during the Eocene Thermal Maximum 2 when atmospheric carbon dioxide concentration was＞1000 ppmv near the palaeo-equator(～0.6°N),the rainfall decreased signif-icantly,leading to the expansion of deciduous forests.This study raises important questions about the future survival of equatorial rainforests and biodiversity hotspots under increased carbon emissions.
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