Oceanic heat pulses fueling moisture transport towards continental Europe across the mid-Pleistocene transition

Periodicities of paleoclimate variations in the first high-resolution non-orbitally tuned grain size record of the past 1 Ma from SW Hungary and regional, global correlations

“…This period corresponds to the second phase of the Mid-Pleistocene Transition when 100-ka glacial/interglacial cycles emerged from 1.25 Ma onwards (e.g. Lisiecki and Raymo, 2005;McClymont et al, 2008McClymont et al, , 2013Hao et al, 2012;Bahr et al, 2018). This shift from 41-ka to 100-ka periodicity was seen on the wavelet transform of our GS proxies with the appearance of moderately strong 100-ky cyles in this period as well (Figs.…”

“…11). The same pattern characterizes the thermocline sea temperature records from the northwest Iberian margin (Bahr et al, 2018;Fig. 11) implying that all records responded to a common climatic forcing.…”

“…A weak SIH generally leads to the contraction of the polar front and the northward displacement of Mediterranean cyclones towards our site, leading to relatively mild falls and winters but with increased precipitation. This is also seen in the somewhat higher thermocline sea temperature records from the northwest Iberian margin compared to MIS 22-24 glacials (Bahr et al, 2018;Fig. 11).…”

“…11). It indicates a southward displacement of the subpolar front and adjacent cyclone belt in the Northern Atlantic region in contrast to Siberia (Bahr et al, 2018), which propagates the transport of warmer air to SE Europe. The transport of warmer, humid air facilitates the growth of Alpine glaciers surrounding the Carpathian Basin.…”

Monsoonal Forcing of European Ice‐Sheet Dynamics During the Late Quaternary

“…They testify to repeated waning of the EIS during full glacial conditions, which by extension implies rapid regrowth of the EIS. Importantly, oscillations as they are documented for the EIS have not yet been reported for the Laurentide Ice Sheet (see supporting information S1 for details on Laurentide Ice Sheet variability), which may suggest a possible decoupling of EIS dynamics from that of other ice sheets in the Northern Hemisphere (Bahr et al, ; de Boer et al, ; Lisiecki & Raymo, ). Notwithstanding its limited size, the EIS plays a critical role for global climate due to its vicinity to the centers of deepwater formation in the subpolar North Atlantic.…”