Colleoni, Florence et al. (2012): Plio-Pleistocene high-low latitude climate interplay; a Mediterranean point of view

Leg/Site/Hole:
ODP 108
ODP 160
ODP 162
ODP 184
DSDP 94
DSDP 94 607
ODP 184 1143
ODP 108 659
ODP 160 967
ODP 162 980
ODP 162 981
ODP 162 982
Identifier:
2012-064741
georefid

10.1016/j.epsl.2011.12.020
doi

Creator:
Colleoni, Florence
Centro Euro-Mediterraneo per i Cambiamenti Climatici, Bologna, Italy
author

Masina, Simona
author

Negri, Alessandra
author

Marzocchi, Alice
author

Identification:
Plio-Pleistocene high-low latitude climate interplay; a Mediterranean point of view
2012
Earth and Planetary Science Letters
Elsevier, Amsterdam, Netherlands
319-320
35-44
The high-low latitude climate interplay during the Plio-Pleistocene global cooling is not yet well understood. Insight on the Mediterranean region can provide some clues about past significant climate changes since the basin reflects the climate dynamics of both high-latitude and low-latitude regions, being connected to the North Atlantic and subjected to monsoon influence. Here we shade light on this connection problem by performing a spectral analysis on an Eastern Mediterranean stack of planktonic records spanning the last 5 Ma and by further comparing it to North Atlantic and Pacific deep- and surface-water records. Our main conclusion is that the Mediterranean detected the main global climate transitions over the last 5 Myr although sapropel depositions indicate that it remained influenced by the African summer monsoon during the whole interval. Our analysis reveals that until 2.2 Ma the Mediterranean planktonic record is driven by regional processes dominated by precession. The progressive emergence of the 41-kyr frequency in the Mediterranean records around 2.8 Ma suggests that, since this date, the Mediterranean was more and more affected by the high-latitude climate dynamics forcing than by the low-latitude one. Moreover, during the ongoing Plio-Pleistocene cooling, the 41-kyr frequency signal in the Mediterranean records anticipated high-latitude deep-water response to the intensification of the Northern Hemisphere Glaciations (NHG) and lagged the signal in tropical latitudes. Finally, toward 1.2 Ma the results suggest that the progressive shift from the 41-kyr to the 100-kyr frequency was led by the northern high latitudes. Overall, our results confirm that the Mediterranean is an ideal site to study the interplay between high and low latitude climates. Abstract Copyright (2012) Elsevier, B.V.
English
Serial
Coverage:Geographic coordinates:
North:57.3100
West:-32.5727East: 113.1707
South:9.2143

Stratigraphy; Atlantic Ocean; benthic taxa; Cenozoic; climate change; cooling; Deep Sea Drilling Project; DSDP Site 607; East Mediterranean; glaciation; global change; intertropical convergence zone; IPOD; isotope ratios; isotopes; latitude; Leg 108; Leg 160; Leg 162; Leg 184; Leg 94; Mediterranean Sea; monsoons; Neogene; North Atlantic; Northern Hemisphere; O-18/O-16; Ocean Drilling Program; ODP Site 1143; ODP Site 659; ODP Site 967; ODP Site 980; ODP Site 981; ODP Site 982; organic compounds; oxygen; Pacific Ocean; paleoclimatology; planktonic taxa; Pleistocene; Pliocene; Quaternary; sapropel; stable isotopes; Tertiary;

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