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Title: The biogeochemistry of cryoconite holes on glaciers in Taylor Valley, Antarctica
Author: Bagshaw, Elizabeth A.
ISNI:       0000 0004 2677 9390
Awarding Body: University of Bristol
Current Institution: University of Bristol
Date of Award: 2008
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Cryoconite holes are small cylindrical depressions which grow on the surface of ice masses worldwide. Cryoconite holes in \M McMurdo Dry Valleys of Antarctica are unique in retaining an ice lid throughout the ablation season, which isolates them from the atmosphere and the surrounding supraglacial drainage system. The holes are a refugia for life in one of the coldest and driest environments on Earth. The Dry Valleys are a nutrient poor environment, colonised by a relatively diverse microbial population that is critically dependent on glacial melt. Sources of liquid water and bioavailable nutrient are thus primary controls on the distribution of life. The biogeochemistry of the cryoconite holes is controlled by the cryoconite debris, the chemistry of the ice and any biogeochemical cycling which occurs in the holes after their formation. The cryoconite debris has variable sources and composition, but the biogeochemistry of the holes is consistent with the gradient of productivity which has been observed in Taylor Valley soils.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available