scholarly journals Permafrost and snow monitoring at Rothera Point (Adelaide Island, Maritime Antarctica): Implications for rock weathering in cryotic conditions

Geomorphology ◽  
2014 ◽  
Vol 225 ◽  
pp. 47-56 ◽  
Author(s):  
Mauro Guglielmin ◽  
M. Roger Worland ◽  
Fabio Baio ◽  
Peter Convey
2020 ◽  
pp. 1-9
Author(s):  
Kevin K. Newsham ◽  
Richard J. Hall ◽  
N. Rolf Maslen

Abstract Despite nematodes routinely being the most frequent soil- and bryophyte-associated animals in maritime Antarctica, there is a lack of clarity about the influence of warming on their populations in the region. Here, we report the results of a field experiment on Adelaide Island that tested the effects of warming with open-top chambers (OTCs) for 37 months on nematodes associated with the bryophytes Cephaloziella varians and Sanionia uncinata. Over the experiment's duration, OTCs increased the population density of the nematode Plectus belgicae in mats of both bryophytes by six-fold, with four- to seven-fold increases in the abundances of male, female and juvenile P. belgicae in warmed mats, and with the largest effects on the abundances of juveniles. Despite C. varians, which is black in colour, warming to a greater extent than S. uncinata during summer, no interactive effects of OTCs and bryophyte species were recorded on the population density of P. belgicae. Our results corroborate a previous study showing that warming increases Plectus population densities in maritime Antarctic soils, with implications for the region's terrestrial food webs.


2010 ◽  
Vol 130 (5) ◽  
pp. 507-513
Author(s):  
Eiichiro Momma ◽  
Hiromitsu Ishii ◽  
Takashi Ono

2012 ◽  
Vol 11 (2) ◽  
Author(s):  
Teguh Prayogo ◽  
Bayu Budiman

Ketapang area is one of lower part or southern sub-province of West Kalimanatan Province, which is located geographically between 108o40’ and 111o20’ in Longitude and between 0o20’ and 3o04’ in Latitude. This area has various of industrial mineral resources, for example quartz sand. Quartz sand or also calledwith white sand is the reasult of rock weathering that contents main mineral, such as quartz, and felsdpar. Then, the result of weathering is cleaned and transported by water or wind and deposited in the stream side, lake or sea. In this paper will bedescribed concerning to locations, characteristics, and usages of quratz sand in Ketapang area, West Kalimantan Province. Based on chemical or laboratory analysis and interpretation, the quartz sands can be used as glass industry, cement industry material, and moulding industry.


2018 ◽  
Author(s):  
Martha Cary Eppes ◽  
◽  
Gregory S. Hancock ◽  
Xiaofeng Chen

2021 ◽  
pp. 104955
Author(s):  
Carlos Paulo ◽  
Ian M. Power ◽  
Amanda R. Stubbs ◽  
Baolin Wang ◽  
Nina Zeyen ◽  
...  

1979 ◽  
Vol 16 (5) ◽  
pp. 977-983 ◽  
Author(s):  
Stephen H. Waits

A variety of bedrock weathering features—both modern and remnant—including surface grus, polygonal cracks, siliceous glaze, tors, weathering pits, and tafoni typify upland outcrops on the Cumberland Peninsula. Tor ridges are particularly prevalent and at lower elevations they show significant modification and streamlining by flowing ice. On summit areas at elevations above 750 m, however, remnant corestones are preserved in situ, suggesting selective preservation of upland surfaces. Bedrock structure and composition, topographic position, and intensity of process strongly influence tor development. Weathering pits are common on high level, open summit surfaces where weathering occurs in response to both climate and continued removal of derived debris. Pit enlargement through lateral undercutting has been favoured by accumulation of protective bottom residua, mechanical weathering, and the presence of exfoliation crusts. It is postulated that salt crystallization plays a role in outcrop microweathering under present upland arctic conditions.


Icarus ◽  
2006 ◽  
Vol 183 (1) ◽  
pp. 10-29 ◽  
Author(s):  
C KOLB ◽  
J MARTINFERNANDEZ ◽  
R ABART ◽  
H LAMMER

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