High Arctic summer warming tracked by increased Cassiope tetragona growth in the world's northernmost polar desert

2017 ◽  
Vol 23 (11) ◽  
pp. 5006-5020 ◽  
Author(s):  
Stef Weijers ◽  
Agata Buchwal ◽  
Daan Blok ◽  
Jörg Löffler ◽  
Bo Elberling
Keyword(s):  
High Arctic ◽  
Polar Desert ◽  
Cassiope Tetragona ◽  
Summer Warming ◽  
Arctic Summer

Role of Land-Surface Changes in Arctic Summer Warming

Science ◽  
2005 ◽  
Vol 310 (5748) ◽  
pp. 657-660 ◽  
Author(s):  
F. S. Chapin
Keyword(s):  
Land Surface ◽  
Summer Warming ◽  
Arctic Summer ◽  
Surface Changes

scholarly journals Microbial Community Structure in Lake and Wetland Sediments from a High Arctic Polar Desert Revealed by Targeted Transcriptomics

PLoS ONE ◽  
2014 ◽  
Vol 9 (3) ◽  
pp. e89531 ◽  
Author(s):  
Magdalena K. Stoeva ◽  
Stéphane Aris-Brosou ◽  
John Chételat ◽  
Holger Hintelmann ◽  
Philip Pelletier ◽  
...  
Keyword(s):  
Community Structure ◽  
Microbial Community ◽  
Microbial Community Structure ◽  
High Arctic ◽  
Polar Desert

scholarly journals Holocene stratigraphy and vegetation history in the Scoresby Sund area, East Greenland

1978 ◽  
Vol 129 ◽  
pp. 1-66
Author(s):  
S Funder
Keyword(s):  
Vegetation History ◽  
High Arctic ◽  
Dwarf Shrub ◽  
Betula Nana ◽  
Isostatic Uplift ◽  
Cassiope Tetragona ◽  
Pollen Diagrams ◽  
Salix Arctica ◽  
Low Arctic ◽  
Holocene Stratigraphy

The Holocene stratigraphy in Scoresby Sund is based on climatic change as reflected by fluctuations in fjord and valley glaciers, immigration and extinction of marine molluscs, and the vegetation history recorded in pollen diagrams from five lakes. The histories are dated by C-14, and indirectly by emergence curves showing the patterns of isostatic uplift. From c. 10100-10400 to 9400 yr BP the major fjord glaciers showed oscillatory retreat with abundant moraine formation, the period of the Milne Land Moraines. The vegetation in the ice-free areas was a sparse type of fell field vegetation but with thermophilous elements indicating temperatures similar to the present. From 9400 yr BP the fjord glaciers retreated rapidly in the narrow fjords, the few moraines formed are referred to the Rødefjord stages and indicate topographically conditioned stillstands. At 8000 yr BP the low arctic Betula nana immigrated into the area, and in the period until 5000 yr BP dense dwarf shrub heath grew in areas where it is now absent. In the fjords the subarctic Mytilus edulis and Pecten islandica lived, suggesting a climate warmer than the present. From c. 5000 yr BP the dense dwarf shrub heath began to disappear in the coastal areas, and a 'poor' heath dominated by the high arctic Salix Arctica and Cassiope tetragona expanded. These two species, which are now extremely common, apparently did not grow in the area until c. 6000 yr BP. In lakes in the coastal area minerogenic sedimentation at c. 2800 yr BP, reflecting the general climatic deterioration.

scholarly journals Comparing Rock-inhabiting Microbial Communities in Different Rock Types from a High Arctic Polar Desert

2018 ◽  
Author(s):  
Yong-Hoe Choe ◽  
Mincheol Kim ◽  
Jusun Woo ◽  
Mi Jung Lee ◽  
Jong Ik Lee ◽  
...  
Keyword(s):  
Microbial Communities ◽  
High Arctic ◽  
Polar Desert ◽  
Rock Types

scholarly journals An estimate of ice wedge volume for a High Arctic polar desert environment, Fosheim Peninsula, Ellesmere Island

2018 ◽  
Vol 12 (11) ◽  
pp. 3589-3604 ◽  
Author(s):  
Claire Bernard-Grand'Maison ◽  
Wayne Pollard
Keyword(s):  
Satellite Imagery ◽  
Regional Scale ◽  
High Arctic ◽  
Ellesmere Island ◽  
The Arctic ◽  
Ground Ice ◽  
Polar Desert ◽  
Ice Volume ◽  
Carbon Release ◽  
Wedge Volume

Abstract. Quantifying ground-ice volume on a regional scale is necessary to assess the vulnerability of permafrost landscapes to thaw-induced disturbance like terrain subsidence and to quantify potential carbon release. Ice wedges (IWs) are a ubiquitous ground-ice landform in the Arctic. Their high spatial variability makes generalizing their potential role in landscape change problematic. IWs form polygonal networks that are visible on satellite imagery from surface troughs. This study provides a first approximation of IW ice volume for the Fosheim Peninsula, Ellesmere Island, a continuous permafrost area characterized by polar desert conditions and extensive ground ice. We perform basic GIS analyses on high-resolution satellite imagery to delineate IW troughs and estimate the associated IW ice volume using a 3-D subsurface model. We demonstrate the potential of two semi-automated IW trough delineation methods, one newly developed and one marginally used in previous studies, to increase the time efficiency of this process compared to manual delineation. Our methods yield acceptable IW ice volume estimates, validating the value of GIS to estimate IW volume on much larger scales. We estimate that IWs are potentially present on 50 % of the Fosheim Peninsula (∼3000 km2), where 3.81 % of the top 5.9 m of permafrost could be IW ice.

scholarly journals Microbial Communities in a High Arctic Polar Desert Landscape

2016 ◽  
Vol 7 ◽  
Author(s):  
Clare M. McCann ◽  
Matthew J. Wade ◽  
Neil D. Gray ◽  
Jennifer A. Roberts ◽  
Casey R. J. Hubert ◽  
...  
Keyword(s):  
Microbial Communities ◽  
High Arctic ◽  
Polar Desert ◽  
Desert Landscape

The vertical distribution of atmospheric DMS in the high Arctic summer

Tellus B ◽  
2010 ◽  
Vol 62 (3) ◽  
pp. 160-171 ◽  
Author(s):  
Jenny Lundén ◽  
Gunilla Svensson ◽  
Wisthaler Armin ◽  
Michael Tjernström ◽  
Armin Hansel ◽  
...  
Keyword(s):  
Vertical Distribution ◽  
High Arctic ◽  
The Vertical Distribution ◽  
Arctic Summer

Interindividual Differences in a Set of Biological Rhythms Documented During the High Arctic Summer (79°N) In Three Healthy Subjects

1984 ◽  
Vol 1 (2) ◽  
pp. 127-138 ◽  
Author(s):  
Alain Reinberg ◽  
Thierry Brossard ◽  
Marie-Francoisé Andre ◽  
Daniel Joly ◽  
Jean Malaurie ◽  
...  
Keyword(s):  
Healthy Subjects ◽  
Biological Rhythms ◽  
High Arctic ◽  
Interindividual Differences ◽  
Arctic Summer

scholarly journals High Bacterial Diversity of Biological Soil Crusts in Water Tracks over Permafrost in the High Arctic Polar Desert

PLoS ONE ◽  
2013 ◽  
Vol 8 (8) ◽  
pp. e71489 ◽  
Author(s):  
Blaire Steven ◽  
Marie Lionard ◽  
Cheryl R. Kuske ◽  
Warwick F. Vincent
Keyword(s):  
Bacterial Diversity ◽  
High Arctic ◽  
Biological Soil Crusts ◽  
Polar Desert ◽  
Soil Crusts
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