Results 41 to 50 of about 235,426 (378)

A phase-space model for Pleistocene ice volume [PDF]

open access: yesEarth and Planetary Science Letters 307, 94-102 (2011), 2011
We present a phase-space model that simulates Pleistocene ice volume changes based on Earth's orbital parameters. Terminations in the model are triggered by a combination of ice volume and orbital forcing and agree well with age estimates for Late Pleistocene terminations.
arxiv   +1 more source

The deterministic excitation paradigm and the late Pleistocene glacial terminations [PDF]

open access: yes, 2022
A deterministic excitation (DE) paradigm is formulated, according to which the late Pleistocene glacial terminations correspond to the excitation, by the orbital forcing, of nonlinear relaxation oscillations (ROs) internal to the climate system in the absence of any stochastic parameterization.
arxiv   +1 more source

Source areas of the Eastern Ebro Valley loess (NE Iberian Peninsula): Heavy mineral composition as a provenance indicator

open access: yesEarth Surface Processes and Landforms, Volume 47, Issue 15, Page 3611-3628, December 2022., 2022
The loess provenance areas of the Ebro and Móra basins are mainly the fluvial terraces of the Middle and Lower Ebro River, respectively, according to the analyses of very heavy minerals and particle size. The wind transport distances are relatively short (<100 km).
José M. Plata   +7 more
wiley   +1 more source

Deglaciation of the North Cascade Range, Washington and British Columbia, from the Last Glacial Maximum to the Holocene

open access: yesCuadernos de Investigación Geográfica, 2017
Glacial retreat from the North Cascade Range after the Last Glacial Maximum (LGM) at approximately 21 ka until the end of the Pleistocene at 11.6 ka was complex and included both continental and alpine glaciers.
J.L. Riedel
doaj   +1 more source

Aeolization on the Atlantic coast of Galicia (NW Spain) from the end of the last glacial period to the present day: Chronology, origin and evolution of coastal dunes linked to sea‐level oscillations

open access: yesEarth Surface Processes and Landforms, Volume 48, Issue 1, Page 198-214, January 2023., 2023
The Atlantic coast of NW Spain, where shingle beaches appear today, has suffered an important mobilization of dunes from a sea level about −120 m (bpsl), 20 ky ago. This aeolization caused the collapse of coastal/fluvial ecosystems (as forests) until the Late Holocene.
Carlos Arce Chamorro   +3 more
wiley   +1 more source

Evolutionary history and identification of conservation units in the giant otter, Pteronura brasiliensis. [PDF]

open access: yes, 2011
The giant otter, Pteronura brasiliensis, occupies a range including the major drainage basins of South America, yet the degree of structure that exists within and among populations inhabiting these drainages is unknown.
Ariani, C.   +19 more
core   +1 more source

Phylogeography of weakfish Cynoscion guatucupa (Perciformes: Sciaenidae) from the southwestern Atlantic

open access: yesScientia Marina, 2011
The genetic structure of populations/species was established during the Quaternary glaciations. Over the last 250 ka (Pleistocene), the South American marine biogeographic history recorded three main glaciations: the most extensive one between 140 and ...
Pedro J. Fernández Iriarte   +4 more
doaj   +1 more source

Testate amoebae (Protozoa: Testacea) as bioindicators in the Late Quaternary deposits of the Bykovsky Peninsula, Laptev Sea, Russia [PDF]

open access: yes, 2004
Testate amoebae (Protozoa: Testacea) were studied in the Late Quaternary permafrost depositsin the Siberian Arctic (Bykovsky Peninsula of the Laptev Sea coast, 71º40'-71º80'N and 129º-129º30'E).
Andreev, Andrei   +3 more
core   +1 more source

Geoarchaeological characterisation of a Younger Dryas site in the Alpine uplands: Cornafessa rock shelter (Italy)

open access: yesGeoarchaeology, Volume 38, Issue 1, Page 35-56, January/February 2023., 2023
Abstract The effects of the Younger Dryas (YD) fluctuation on Late Pleistocene hunter‐gatherers' settlement and subsistence systems in the southern Alps are poorly known. This is primarily due to the scarcity of archaeological sites dating from the YD, in contrast with the extensive evidence available from the lateglacial interstadial and the early ...
Diego E. Angelucci   +2 more
wiley   +1 more source

Phenotypic plasticity and development of cold-season insects (Coleoptera: Leiodidae) and their response to climatic change

open access: yesEuropean Journal of Entomology, 2003
Cold-season beetles, Catops nigricans Spence, Choleva agilis Illiger and Choleva elongata Payk., i.e. beetles which start to lay eggs in autumn, which are active during the winter in the adult stage and develop from the egg stage to the adult stage ...
Werner TOPP
doaj   +1 more source

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