Dynamics of Ice-Island Motion Near the Coast of Axel Heiberg Island, Canadian High Arctic
نویسندگان
چکیده
منابع مشابه
Remote-sensing Resources for Monitoring Glacier Fluctuations on Axel Heiberg Island
We document the abundant resources available for the photographic reconstruction of glacier terminus positions in the Canadian High Arctic, with particular reference to Axel Heiberg Island. Early terrestrial photographs may yet be discovered in the archives of explorers, but systematic photography of the High Arctic began with aerial coverage by the U.S. Air Force’s Operation Polaris in the ear...
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The spectacularly preserved Metasequoia wood excavated from the Fossil Forest site of Axel Heiberg Island (Canadian High Arctic) provides a unique window into the δ18O value of Eocene meteoric water via the analysis of fossil cellulose. Seventeen fossilized Metasequoia individuals yielded cellulose with δ18O (Vienna standard mean ocean water [VSMOW]) values ranging from 17.1‰ to 21.4‰ and with ...
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Diatoms are the most diverse group of algae, playing a major role in global carbon and silicon cycles (Kidder and Erwin, 2001; Armbrust, 2009) and inhabiting virtually any environment that provides moisture and sunlight (Mann, 1999). Thus, they offer important information to help reconstruct paleoen-vironments and clarify stratigraphic relationships. Their strati-graphic range extends down at l...
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A Late Cretaceous (92 to 86 million years ago) vertebrate assemblage from the high Canadian Arctic (Axel Heiberg Island) implies that polar climates were warm (mean annual temperature exceeding 14 degreesC) rather than near freezing. The assemblage includes large (2.4 meters long) champsosaurs, which are extinct crocodilelike reptiles. Magmatism at six large igneous provinces at this time sugge...
متن کاملBiological Characterization of Microenvironments in a Hypersaline Cold Spring Mars Analog
While many habitable niches on Earth are characterized by permanently cold conditions, little is known about the spatial structure of seasonal communities and the importance of substrate-cell associations in terrestrial cyroenvironments. Here we use the 16S rRNA gene as a marker for genetic diversity to compare two visually distinct but spatially integrated surface microbial mats on Axel Heiber...
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ژورنال
عنوان ژورنال: Annals of Glaciology
سال: 1989
ISSN: 0260-3055,1727-5644
DOI: 10.1017/s0260305500007126