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26 wrz 2016 · We find that a sustained late Miocene cooling occurred synchronously in both hemispheres, and culminated with ocean temperatures dipping to near-modern values between about 7 and 5.4 million...
18 paź 2021 · During the Miocene, major global cooling occurred during two intervals: the middle Miocene (∼14–13 Ma) and the late Miocene (∼7-6 Ma). The Antarctic Ice Sheet expanded substantially at ∼14–13 Ma, and glaciation in the Northern Hemisphere was initiated at ∼7–6 Ma.
13 lis 2004 · This cycle is repeated with a second abrupt cooling of 2°C between 23.3 and 23.1 Ma associated with the second isotope step, followed by a 2.5°C warming reaching a maximum temperature of ∼5°C at 23.0 Ma.
23 gru 2020 · Climate variability generally decreased during the MMCT and after ∼13 Ma (Holbourn et al., 2018) is suggestive of a more stable Antarctic ice sheet; however, major perturbations of the global carbon cycle coincident with climate shifts include the late Miocene biogenic bloom (Diester-Haass et al., 2005; Drury et al., 2018), the prolonged ...
6 cze 2012 · Measurements from several ocean cores reveal that ocean warmth persisted throughout the late Miocene epoch despite CO2 levels of only 200–350 p.p.m.v., probably driven by a deep thermocline...
25 lip 2022 · Here we present boron isotope compositions for planktic foraminifera, which record carbon dioxide change for the interval of most rapid cooling, the late Miocene cooling event between 7 and...
23 gru 2015 · Bipolar cooling during the late Miocene, ~8 Ma, was likely caused by uplift of the Himalaya-Tibetan Plateau and other mountains that strengthened silicate chemical weathering and drawdown of atmospheric CO 2, cooling the Earth.
