Results 91 to 100 of about 66,733 (286)

Subsurface Investigations of Cryo‐Hydrogeological Features in a High Arctic Catchment Under Transition

open access: yesPermafrost and Periglacial Processes, EarlyView.
ABSTRACT In this study, the internal structure and seasonal variations of cryo‐hydrogeological features were investigated in the Fuglebekken catchment, located near the Polish Polar Station Hornsund in Svalbard. Over a few years, rising air temperatures and intensified water circulation have significantly altered the distribution, extent, and state of ...
Wawrzyniak Tomasz   +3 more
wiley   +1 more source

Effects of Surface Characteristics on the Existence of Isolated Permafrost in Northeastern Mongolia

open access: yesPermafrost and Periglacial Processes, EarlyView.
ABSTRACT Isolated patches of permafrost, where ground thermal changes are affected by ecosystem factors such as vegetation cover rather than climate, may be vulnerable to environmental disturbances in semiarid regions. However, the impacts of ecosystem factors remain underevaluated in Mongolia.
Gansukh Yadamsuren   +9 more
wiley   +1 more source

Formations quaternaires et néotectonique dans le bassin de l'Orbieu (Aude, France)

open access: yesPhysio-Géo, 2013
A geomorphological and sedimentological analysis makes it possible to identify the different Quaternary formations in the Orbieu valley. Then, the reconstruction of the longitudinal and transversal profiles shows the evolution of tectonic deformations ...
Jean-Pierre Larue
doaj   +1 more source

A two-species continuum model for aeolian sand ripples [PDF]

open access: yes, 1999
We formulate a continuum model for aeolian sand ripples consisting of two species of grains: a lower layer of relatively immobile clusters, with an upper layer of highly mobile grains moving on top.
A. Mehta   +29 more
core   +2 more sources

Permafrost Terrain Disturbance Susceptibility in the Nacho Nyäk Tagé (Stewart River) Watershed, Yukon, Canada

open access: yesPermafrost and Periglacial Processes, EarlyView.
ABSTRACT The Nacho Nyäk Tagé (Stewart River) watershed in central Yukon (Canada) is characterized by discontinuous permafrost that is locally highly sensitive to thaw. This study aims to map the spatial distribution of permafrost terrain disturbances (PTDs) in the watershed and model thaw susceptibility to support community‐led land‐use planning by the
Frederic Brieger   +2 more
wiley   +1 more source

La thèse de Paul DEMANGEON un demi-siècle après : une relecture actualisée dans le bassin de l'Orb (Languedoc, France)

open access: yesPhysio-Géo, 2008
A half-century after the P. DEMANGEON thesis (1959) and despite numerous researches concerning the southern Central Massif, there are no certitudes about the chronology of the erosion surfaces and the uplift stages of the Massif Central.
Robert Étienne, Jean-Pierre Larue
doaj   +1 more source

LamelODF: a MATLAB‐based toolbox for orientation distribution analysis and mapping of lamellar minerals for laboratory and synchrotron X‐ray diffractometers

open access: yesJournal of Applied Crystallography, EarlyView.
LamelODF is a MATLAB‐based toolbox aimed at simplifying the automated extraction of orientation distribution functions from 2D X‐ray diffraction data of lamellar minerals in transmission mode. It accommodates both laboratory and synchrotron data formats, providing an integrated pipeline from raw data to spatially resolved textural maps, enabling robust
Baptiste Dazas   +5 more
wiley   +1 more source

Un littoral sableux en progradation : le lido entre Leucate et Port-la-Nouvelle (Aude, Golfe du Lion, France)

open access: yesPhysio-Géo, 2009
A kinematic study of vertical aerial photos taken between 1952 and 2008 reveals that the Leucate-Port-la-Nouvelle lido (Aude) has prograded of about 15 % in width.
Jean-Pierre Larue   +2 more
doaj   +1 more source

The geological and paleontological heritage of Manresa municipality (Catalonia, Spain) [PDF]

open access: yes, 2012
A preliminary inventory of 14 points of geological interest has been carried out in the Manresa municipality (Barcelona, Catalonia, Spain). All the rocks within this area belong to the sedimentary infill of the Ebro basin that took place during the ...
Climent Costa, Ferran   +4 more
core  

The use of grain size distribution analysis of sediments and soils in forensic enquiry [PDF]

open access: yes, 2007
The use of grain size distribution analysis in forensic enquiry was investigated with reference to four forensic case studies which contained the type of sample restraints and limitations often encountered in criminal case work.
Bull, PA, Morgan, RM
core   +1 more source

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