inscription
PORTAIL D'INFORMATION GÉOGRAPHIQUE

Résultats de la recherche (5 résultats)

Affinez votre recherche

Par Collection Par Auteur Par Date Par Sujet Par Titre
  • Evaluating the Schmidt hammer as a method for distinguishing the relative age of late Holocene moraines : Svellnosbreen, Jotunheimen, Norway
  • Dating ; Holocene ; Little ice age ; Moraine ; Norway ; Quaternary ; Relative dating ; Schmidt hammer ; Southern Norway
  • The AA. used the Schmidt hammer to assess the relative exposure ages of previously dated Little Ice Age moraines deposited by Svellnosbreen glacier in Jotunheimen southern Norway. Schmidt hammer measurements were taken on moraine surfaces which have
  • been deglaciated for 79–259 years since the Little Ice Age, to reconstruct and date previous snout positions. Dating used a typical linear Little Ice Age age-calibration curve and the ages of unknown surfaces were predicted based on Schmidt hammer
  • measurements with the support of lichenometric dates. Calibrated ages exhibited potential dating errors of 63-103 years years, which were estimated using 95% confidence intervals associated with two control points based on moraines of known ages. Schmidt hammer
  • Reconstructing fluctuations of La Mare Glacier (Eastern Italian Alps) in the late Holocene : new evidence for a Little Ice Age maximum around 1600 AD
  • Alps (The) ; C 14 dating ; Climatic change ; Glacier ; Glacier fluctuation ; Holocene ; Italy ; Lichenometry ; Little ice age ; Palaeo-environment ; Photointerpretation
  • of the Ortles-Cevedale massif (Eastern Italian Alps). Late Holocene glacier maxima preceding direct observations were reconstructed by applying age dating techniques (radiocarbon and lichenometry) to glacial deposits in the proglacial area of the glacier
  • Alps (The) ; Climatic change ; Climatic warming ; Environmental management ; Europe ; Glacial features ; Glacier ; Little ice age ; Model ; Mountain ; Natural hazards ; New Zealand ; Palaeo-environment ; Paraglacial ; South Island ; United Kingdom
  • , and the Little Ice Age). From this, they may anticipate the likely responses of glacial and paraglacial environments in mountains to global warming over coming decades. The AA. show that future changes in glacial and paraglacial environments, in particular
  • one or more glacial cycles. Based on these glacial landforms and optically stimulated luminescence (OSL) ages, the AA. examine the timing and extent of glacial advances during the last glacial cycle and discuss environmental factors, including climate
  • generated based on aerial photographs from 1961 (black and white frame camera), 1990 (false infrared frame camera) and 2009 (colour digital camera), obtained from the Norsk Polar Institute. Receding from its maximum Little Ice Age extent, attained