Results 101 to 110 of about 95,525 (314)
The role of changing temperature in microbial metabolic processes during permafrost thaw.
PLoS ONE, 2020 Approximately one fourth of the Earth's Northern Hemisphere is underlain by permafrost, earth materials (soil, organic matter, or bedrock), that has been continuously frozen for at least two consecutive years.
Komi S Messan +5 more
doaj +1 more source
Automated delineation and morphometry of unclassified subglacial bedforms
Boreas, EarlyView.We present an automated tool for mapping and analysing subglacial bedforms using volumetric obscurance, without classification. Tested on ArcticDEM data, the method produces bedform outlines with 75% correspondence compared to manually digitized maps.
Sofyane Hesni +5 more
wiley +1 more source
Boreas, EarlyView.Palaeoecological studies reporting long‐term development histories of subarctic fens—explicitly, orohemiarctic peatlands—are scarce, and overall, permafrost‐free peatlands located in the immediate vicinity of permafrost zones have received little attention in Fennoscandia. Here, we use a multiproxy approach to study the millennial‐scale dynamics of two
Sanna R. Piilo +6 more
wiley +1 more source
River Discharge, in Chapter 5, Arctic, State of the Climate in 2010 [PDF]
, 2011 Several large-scale climate patterns influenced climate conditions and weather patterns across the globe during 2010. The transition from a warm El Niño phase at the beginning of the year to a cool La Niña phase by July contributed to many notable events,
Lammers, Richard B. +1 more
core +2 more sources
Eastern Beringia and beyond: Late Wisconsinan and Holocene landscape dynamics along the Yukon Coastal Plain, Canada [PDF]
, 2012 Terrestrial permafrost archives along the Yukon Coastal Plain (northwest Canada) have recorded landscape development and environmental change since the Late Wisconsinan at the interface of unglaciated Beringia (i.e.
Fritz, Michael +6 more
core +1 more source
Boreas, EarlyView.The site of Barmaky currently marks the oldest Epigravettian occupation of north‐western Ukraine shortly after the Last Glacial Maximum (LGM), dated to around 19 cal. ka BP. Stable isotope analyses of bone collagen from six terrestrial mammals and two bird species show a comparatively highly structured palaeo‐food web.
Lilian Reiss +6 more
wiley +1 more source
Potential for Abrupt Changes in Atmospheric Methane [PDF]
, 2008 Methane (CH4) is the second most important greenhouse gas that humans directly influence, carbon dioxide (CO2) being first. Concerns about methane’s role in abrupt climate change stem primarily from (1) the large quantities of methane stored as solid ...
Archer, David +3 more
core +1 more source
Shorter contributions to general geology 1954; Permafrost and ground water in Alaska [PDF]
, 1955 David M. Hopkins, Thor N. V. Karlstrom
openalex +1 more source
Biodiversity in mountain soils above the treeline
Biological Reviews, EarlyView.ABSTRACT Biological diversity in mountain ecosystems has been increasingly studied over the last decade. This is also the case for mountain soils, but no study to date has provided an overall synthesis of the current state of knowledge. Here we fill this gap with a first global analysis of published research on cryptogams, microorganisms, and fauna in ...
Nadine Praeg +36 more
wiley +1 more source
, 2007 Why does freezing break up rock? Everybody knows that when water freezes it expands by nine percent to be precise. If it seeps into rocks and then freezes, the rocks can fracture and split apart, a process known as frost weathering.
Murton, Julian
core