Results 61 to 70 of about 574,554 (206)
Archaeometry, EarlyView.ABSTRACT Riverine and valley systems across the globe have been central to the development of past urban centres. By AD 900, the Shashe and Limpopo Rivers seem to have facilitated the interaction and integration of early farming communities in southern Africa. This paper focuses on the application of geoarchaeological perspectives made available by the
B. S. Nxumalo
wiley +1 more source
Contact Pressure Measurement System in Cross Wedge Rolling [PDF]
, 2010 In the cross wedge rolling process (CWR), plastic deformation is geared by a driving torque transmitted by friction on die surface. Friction plays a role which has to be further identified in this metal forming process. The local contact pressure between
MANGIN, Philippe +2 more
core +1 more source
Boreas, EarlyView.Józefów site is a case study which provides a detailed record of environmental and climate changes and confirms the main traces of the landscape morphogenesis of the Late Pleistocene established in central‐eastern Europe. This study presents a multiproxy reconstruction of palaeoenvironment under variable climatic conditions from the retreat of the ...
Aleksandra Majecka +11 more
wiley +1 more source
Modeling the spatiotemporal variability in subsurface thermal regimes across a low-relief polygonal tundra landscape [PDF]
The Cryosphere, 2016 Vast carbon stocks stored in permafrost soils of Arctic tundra are under risk of release to the atmosphere under warming climate scenarios. Ice-wedge polygons in the low-gradient polygonal tundra create a complex mosaic of microtopographic features ...
J. Kumar +6 more
doaj +1 more source
Spectral Properties of Wedge Problems [PDF]
, 2012 This paper presents our recent results on the study of the scattering and diffraction of an incident plane wave by wedge structures. A review about the impenetrable wedge problem at skew incidence and about the penetrable wedge at normal incidence is ...
Vito Daniele +3 more
core +1 more source
Truncated drumlins and their implication for past sea level reconstructions
Boreas, EarlyView.Coastal erosion of glacigenic sediments, particularly in the form of retreating drumlin bluffs, is a key process in paraglacial landscape evolution during periods of relative sea‐level (RSL) rise. As marine transgression reworks formerly subaerial glacial terrains, drumlins act as discrete sediment sources generating characteristic erosional and ...
Riccardo Arosio +3 more
wiley +1 more source
Boreas, EarlyView.The AlpIce‐1 database is the first compilation of published geomorphological and geochronological markers constraining build‐up, culmination and decay of glaciers from the Last Glacial Maximum through the Holocene across the entire European Alps. AlpIce‐1 integrates more than 4200 surface‐exposure and radiocarbon ages, homogenized, quality controlled ...
Sarah Kamleitner +6 more
wiley +1 more source
Impacts of temperature and soil characteristics on methane production and oxidation in Arctic tundra [PDF]
Biogeosciences, 2018 Rapid warming of Arctic ecosystems accelerates microbial decomposition of soil organic matter and leads to increased production of carbon dioxide (CO2) and methane (CH4).
J. Zheng +9 more
doaj +1 more source
Boreas, EarlyView.A detailed morphometric analysis of 200 cirques across the western Putorana Plateau, central Siberia, was undertaken to investigate cirque development, reconstruct glaciers and infer palaeoclimatic conditions. Cirques are amphitheatre‐shaped landforms with mean length and widths of 936 and 1000 m, respectively, indicating a mature glacial landscape ...
Rachel P. Oien, Ethan Lee
wiley +1 more source
Mapping snow depth within a tundra ecosystem using multiscale observations and Bayesian methods [PDF]
The Cryosphere, 2017 This paper compares and integrates different strategies to characterize the variability of end-of-winter snow depth and its relationship to topography in ice-wedge polygon tundra of Arctic Alaska.
H. M. Wainwright +6 more
doaj +1 more source