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dc.contributor.authorForeman, Christine M.
dc.contributor.authorWolf, Craig F.
dc.contributor.authorPriscu, John C.
dc.date.accessioned2017-07-27T14:34:03Z
dc.date.available2017-07-27T14:34:03Z
dc.date.issued2004-09
dc.identifier.citationForeman CM, Wolf CF, Priscu JC, "Impact of episodic warming events" Aquat Geochem, 2004 10:239-268en_US
dc.identifier.issn1380-6166
dc.identifier.urihttps://scholarworks.montana.edu/xmlui/handle/1/13422
dc.description.abstractLakes in the Taylor Valley, Antarctica, were investigated to determine the impact of a significant air temperature warming event that occurred during the austral summer of 2001–2002. The warming in the valleys caused an increase in glacial run-off, record stream discharge, an increase in lake levels, and thinning of the permanent ice covers. These changes in the physical environment drove subsequent changes in the biogeochemistry of the lakes. Primary production in West Lake Bonney during the flood was reduced 23% as a consequence of stream induced water column turbidity. Increased nutrient levels within the lakes occurred in the year following the temperature induced high flow year. For example, soluble reactive phosphorus loading to Lake Fryxell was four-fold greater than the long-term average loading rates. These high nutrient levels corresponded to an increase in primary production in the upper water columns of Lakes Bonney and Fryxell. Depth integrated chlorophyll-a values increased 149% in East Lake Bonney, 48% in West Lake Bonney, and showed little change in Lake Fryxell; chlorophyll-a in Lake Hoare decreased 18% compared to long-term averages recorded as part of our ten year monitoring program, presumably from a reduction in under-ice PAR caused by increased sediment loads on the ice cover. Overall the warming event served to recharge the ecosystem with liquid water and associated nutrients. Such floods may play an important role in the long-term maintenance of liquid water in these dry valley lakes.en_US
dc.titleImpact of episodic warming eventsen_US
dc.typeArticleen_US
mus.citation.extentfirstpage239en_US
mus.citation.extentlastpage268en_US
mus.citation.issue3-4en_US
mus.citation.journaltitleAquatic Geochemistryen_US
mus.citation.volume10en_US
mus.identifier.categoryEngineering & Computer Scienceen_US
mus.relation.collegeCollege of Engineeringen_US
mus.relation.departmentCenter for Biofilm Engineering.en_US
mus.relation.departmentChemical & Biological Engineering.en_US
mus.relation.departmentChemical Engineering.en_US
mus.relation.universityMontana State University - Bozemanen_US
mus.relation.researchgroupCenter for Biofilm Engineering.en_US
mus.data.thumbpage9en_US
mus.contributor.orcidForeman, Christine M.|0000-0003-0230-4692en_US


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