Late Pleistocene Climate in the Central American Lowlands

2013 ◽  
pp. 165-178 ◽  
Author(s):  
Barbara W. Leyden ◽  
Mark Brenner ◽  
David A. Hodell ◽  
Jason H. Curtis
Keyword(s):  
Late Pleistocene ◽  
Central American ◽  
Pleistocene Climate

scholarly journals Late Pleistocene climate induced changes in paleo-vegetation in Borneo: Possible implications to human divergence

2021 ◽  
Vol 267 ◽  
pp. 107109
Author(s):  
Zaibao Yang ◽  
Yanli Lei ◽  
Yair Rosenthal ◽  
Tiegang Li ◽  
Zhimin Jian
Keyword(s):  
Late Pleistocene ◽  
Pleistocene Climate ◽  
Induced Changes

Emergence of critical climate states during the Pleistocene

2021 ◽  
Author(s):  
Nicholas Golledge
Keyword(s):  
Dynamical Systems ◽  
Late Pleistocene ◽  
Dominant Frequency ◽  
Climate System ◽  
Ice Age ◽  
Early Pleistocene ◽  
Glacial Cycles ◽  
Pleistocene Climate ◽  
System Nodes ◽  
Systems Framework

<p>During the Pleistocene (approximately 2.6 Ma to present) glacial to interglacial climate variability evolved from dominantly 40 kyr cyclicity (Early Pleistocene) to 100 kyr cyclicity (Late Pleistocene to present). Three aspects of this period remain poorly understood: Why did the dominant frequency of climate oscillation change, given that no major changes in orbital forcing occurred? Why are the longer glacial cycles of the Late Pleistocene characterised by a more asymmetric form with abrupt terminations? And how can the Late Pleistocene climate be controlled by 100 kyr cyclicity when astronomical forcings of this frequency are so much weaker than those operating on shorter periods? Here we show that the decreasing frequency and increasing asymmetry that characterise Late Pleistocene ice age cycles both emerge naturally in dynamical systems in response to increasing system complexity, with collapse events (terminations) occuring only once a critical state has been reached. Using insights from network theory we propose that evolution to a state of criticality involves progressive coupling between climate system 'nodes', which ultimately allows any component of the climate system to trigger a globally synchronous termination. We propose that the climate state is synchronised at the 100 kyr frequency, rather than at shorter periods, because eccentricity-driven insolation variability controls mean temperature change globally, whereas shorter-period astronomical forcings only affect the spatial pattern of thermal forcing and thus do not favour global synchronisation. This dynamical systems framework extends and complements existing theories by accomodating the differing mechanistic interpretations of previous studies without conflict.</p>

Late Pleistocene climate inferences from a water balance model of Jakes Valley, Nevada (USA)

2016 ◽  
Vol 56 (2-3) ◽  
pp. 109-122 ◽  
Author(s):  
Cornelia Barth ◽  
Douglas P. Boyle ◽  
Benjamin J. Hatchett ◽  
Scott D. Bassett ◽  
Christopher B. Garner ◽  
...  
Keyword(s):  
Water Balance ◽  
Late Pleistocene ◽  
Water Balance Model ◽  
Balance Model ◽  
Pleistocene Climate

scholarly journals Palaeoecology of giraffe tracks in Late Pleistocene aeolianites on the Cape south coast

2018 ◽  
Vol 114 (1/2) ◽  
Author(s):  
Charles Helm ◽  
Hayley Cawthra ◽  
Richard Cowling ◽  
Jan De Vynck ◽  
Curtis Marean ◽  
...  
Keyword(s):  
South Africa ◽  
Late Pleistocene ◽  
Coastal Plain ◽  
Suitable Habitat ◽  
Geological Evidence ◽  
Pleistocene Climate ◽  
Show Evidence ◽  
Fossil Records ◽  
Glacial Periods ◽  
Still Bay

Until now there have been no reliable historical or skeletal fossil records for the giraffe (Giraffa camelopardalis) south of the Orange River or northern Namaqualand. The recent discovery of fossil giraffe tracks in coastal aeolianites east of Still Bay, South Africa, significantly increases the geographical range for this species, and has implications for Late Pleistocene climate and vegetation in the southern Cape. Giraffe populations have specialised needs, and require a savanna ecosystem. Marine geophysical and geological evidence suggests that the broad, currently submerged floodplains of the Gouritz and Breede Rivers likely supported a productive savanna of Vachellia karroo during Pleistocene glacial conditions, which would have provided a suitable habitat for this species. We show evidence for the hypothesis that the opening of the submerged shelf during glacial periods acted as a pathway for mammals to migrate along the southern coastal plain.

Transient nature of late Pleistocene climate variability

Nature ◽  
2008 ◽  
Vol 456 (7219) ◽  
pp. 226-230 ◽  
Author(s):  
Thomas J. Crowley ◽  
William T. Hyde
Keyword(s):  
Climate Variability ◽  
Late Pleistocene ◽  
Transient Nature ◽  
Pleistocene Climate

Atlantic overturning responses to Late Pleistocene climate forcings

Nature ◽  
2008 ◽  
Vol 456 (7218) ◽  
pp. 85-88 ◽  
Author(s):  
Lorraine E. Lisiecki ◽  
Maureen E. Raymo ◽  
William B. Curry
Keyword(s):  
Late Pleistocene ◽  
Pleistocene Climate ◽  
Climate Forcings
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