RT info:eu-repo/semantics/article
T1 Periglacial environments and frozen ground in the central Pyrenean high mountain area: Ground thermal regime and distribution of landforms and processes
A1 Serrano Cañadas, Enrique
A1 Sanjosé Blasco, José Juan de
A1 Gómez Lende, Manuel
A1 López Moreno, Juan Ignacio
A1 Pisabarro Pérez, Alfonso
A1 Martínez Fernández, Adrián
K1 Geomorfología - España - Pirineos
K1 Periglacial belts
K1 Cinturones periglaciares
K1 Altitudinal distribution
K1 Distribución altitudinal
K1 Mountain permafrost
K1 Montaña, Permafrost de
AB The periglacial belt is located in the highest parts of temperate mountains. The balance between mean air and ground temperatures and the presence of water determine the effectiveness of periglacial processes related to permafrost, the active layer or seasonally frozen ground (SFG). This study combines thermal and geomorphological data obtained in four Pyrenean massifs (Infierno‐Argualas, Posets, Maladeta and Monte Perdido) to improve knowledge on the occurrence and distribution of frozen ground. The methodology used is based on the study of landforms as frozen ground indicators, mapping processes, ground temperature analysis, basal temperature of snow, thermal mapping and geomatic surveys on rock glaciers and protalus lobes. In the Pyrenean high mountain areas the lower limit of frozen ground is at ~2,650m a.s.l., possible permafrost appears above 2,650m a.s.l. on north‐ and south‐facing slopes, and probable permafrost is dominant above 2,900m a.s.l. Unfrozen ground with cold‐associated geomorphological processes reach 2,900m a.s.l. and unfrozen and frozen ground distribution points to a patchy pattern throughout the periglacial belt. The most widespread frozen grounds are SFG. The thermal data, mean annual ground temperature, cold season temperatures, bottom temperature snow measurements, freeze/thaw cycles and distribution of landforms permit the establishment of a periglacial land system divided into three main belts: infraperiglacial, middle periglacial and supraperiglacial. The large number of processes and landforms that are involved and their altitudinal and spatial organization make up a complex environment that determines the geoecological dynamics of high mountain areas.
PB Wiley
SN 1099-1530
YR 2019
FD 2019
LK http://uvadoc.uva.es/handle/10324/40667
UL http://uvadoc.uva.es/handle/10324/40667
LA eng
NO Permafrost and Periglacial Processes, 2019, vol. 30, n. 4. p. 292-309
NO Producción Científica
DS UVaDOC
RD 24-nov-2024