Results 41 to 50 of about 1,550 (214)

Policy implications of warming permafrost [PDF]

, 2012
Permafrost is perennially frozen ground occurring in about 24% of the exposed land surface in the Northern Hemisphere. The distribution of permafrost is controlled by air temperature and, to a lesser extent, by snow depth, vegetation, orientation to ...

core  

Chemical weathering detection in the periglacial landscapes of Maritime Antarctica: New approach using geophysical sensors, topographic variables and machine learning algorithms

Geoderma, 2023
The chemical weathering intensity in Antarctica is underestimated. As the chemical weathering intensity increases, hydrological, geochemical and geophysical changes occur in the different environmental spheres and at their interfaces through reactions ...
Danilo César de Mello, Gustavo Vieira Veloso, Cassio Marques Moquedace, Isabelle de Angeli Oliveira, Márcio Rocha Francelino, Fabio Soares de Oliveira, José João Lelis Leal de Souza, Lucas Carvalho Gomes, Carlos Ernesto Gonçalves Reynaud Schaefer, Elpídio Inácio Fernandes-Filho, Edgar Batista de Medeiros Júnior, José Alexandre Melo Demattê   +11 more
doaj   +1 more source

The Age and Origin of Block Deposits in the Victorian Alps, Australia

Permafrost and Periglacial Processes, EarlyView.
ABSTRACT Large periglacial block deposits are found in the mountains of southeastern Australia. Despite their widespread distribution, their mode of formation and age are poorly understood. These landforms hold considerable potential to shed light on the nature of cooling during glacial periods. In this paper we present a new study of block deposits in
Timothy T. Barrows, Michelle S. Worland, Julian Murton, Stephanie C. Mills, L. Keith Fifield   +4 more
wiley   +1 more source

Characteristics of bacterial communities in aquatic ecosystems near the Collins glacial (Fildes Peninsula, Antarctica)

Ecological Indicators
Bacteria are vital for maintaining ecosystem function in the rapidly changing environment, but limited data was reported regarding the characteristics of bacterial communities along the regional-scale in aquatic ecosystems on the Fildes Peninsula ...
Chunmei Zhang, Huirong Li, Yinxin Zeng, Haitao Ding, Bin Wang, Yangjie Li, Zhongqiang Ji, Wei Luo, Yonghong Bi   +8 more
doaj   +1 more source

First Findings of Buried Late-Glacial Paleosols within the Dune Fields of the Tomsk Priobye Region (SE Western Siberia, Russia)

Geosciences, 2019
Buried soils within aeolian deposits are considered an important tool for diagnosing, determining the age, and estimating the intensity of aeolian processes at the transition from the Pleistocene to the Holocene in the Northern Hemisphere.
Alexandr Konstantinov, Sergey Loiko, Alina Kurasova, Elizaveta Konstantinova, Andrey Novoselov, Georgy Istigechev, Sergey Kulizhskiy   +6 more
doaj   +1 more source

Deciphering Freeze–Thaw Dynamics In Rockwalls: A Novel Approach for High Accuracy Regional‐Scale Modeling

Permafrost and Periglacial Processes, EarlyView.
ABSTRACT Using a large and novel array of instruments on five rockwalls in northern Gaspesia, their respective surface energy balances were calculated and their thermal regimes were measured and modeled to depths exceeding the seasonal frost penetration.
Tom Birien, Francis Gauthier
wiley   +1 more source

Capturing the Multi‐Decadal Evolution of Glacier–Permafrost Interactions in a High‐Alpine Environment (Ritord, Western Swiss Alps)

Permafrost and Periglacial Processes, EarlyView.
ABSTRACT This study investigates the multi‐decadal evolution of a glacier forefield under permafrost conditions in the Combins Massif (western Swiss Alps). A multi‐method approach based on historical and recent datasets is used to analyze its landform components.
Julie Wee, Hanne Hendrickx, Sebastián Vivero   +2 more
wiley   +1 more source

Slow-moving rock glaciers in marginal periglacial environment of Southern Carpathians [PDF]

Earth Surface Dynamics
Rock glaciers, composed of debris and ice, are widely distributed across cold mountain regions worldwide. Although research on rock glaciers is gaining momentum, the distinct behaviour of rock glaciers in the marginal periglacial environments remains ...
A. Onaca, A. Onaca, F. Sîrbu, V. Poncoş, C. Hilbich, T. Strozzi, P. Urdea, P. Urdea, R. Popescu, R. Popescu, O. Berzescu, B. Etzelmüller, A. Vespremeanu-Stroe, M. Vasile, M. Vasile, D. Teleagă, D. Birtaş, I. Lopătiţă, S. Filhol, A. Hegyi, A. Hegyi, F. Ardelean   +21 more
doaj   +1 more source

Multiproxy Chronologies of the Hurd Rock Glacier (Livingston Island, South Shetland Islands, Maritime Antarctica): Between the Late‐Stage Stabilization and Flow Deceleration

Permafrost and Periglacial Processes, EarlyView.
ABSTRACT The Hurd Rock Glacier, located on Livingston Island (South Shetland Islands archipelago, Maritime Antarctica), is a tongue‐shaped feature composed of angular boulders, displaying transverse ridges and furrows, and featuring lobate structures, which are more prominently developed in its frontal sector.
Rosana Menéndez‐Duarte, Jesús Ruiz‐Fernández, Laura Rodríguez‐Rodríguez, José M. Fernández‐Fernández, Vincent Rinterknecht, ASTER Team   +5 more
wiley   +1 more source

Temporal and spatial variation in active layer depth in the McMurdo Sound Region, Antarctica

, 2010
A soil climate monitoring network, consisting of seven automated weather stations, was established between 1999 and 2003, ranging from Minna Bluff to Granite Harbour and from near sea level to about 1700m on the edge of the polar plateau.
Seybold, Cathy A., Adlam, Leah Seree, Balks, Megan R., Campbell, David I.   +3 more
core   +1 more source