College of Agriculture

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As the foundation of the land grant mission at Montana State University, the College of Agriculture and the Montana Agricultural Experiment Station provide instruction in traditional and innovative degree programs and conduct research on old and new challenges for Montana’s agricultural community. This integration creates opportunities for students and faculty to excel through hands-on learning, to serve through campus and community engagement, to explore unique solutions to distinct and interesting questions and to connect Montanans with the global community through research discoveries and outreach.

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Author: search.filters.author.Bowling, MarkSubject: search.filters.subject.mercer subglacial lake

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    Scientific access into Mercer Subglacial Lake: scientific objectives, drilling operations and initial observations
    (Cambridge University Press, 2021-06) Priscu, John C.; Kalin, Jonas; Winans, John; Campbell, Timothy; Siegfried, Matthew R.; Skidmore, Mark; Dore, John E.; Leventer, Amy; Harwood, David M.; Duling, Dennis; Zook, Robert; Burnett, Justin; Gibson, Dar; Krula, Edward; Mironov, Anatoly; McManis, Jim; Roberts, Graham; Rosenheim, Brad E.; Christner, Brent C.; Kasic, Kathy; Fricker, Helen A.; Lyons, W. Berry; Barker, Joel; Bowling, Mark; Collings, Billy; Davis, Christina; Gagnon, Al; Gardner, Christopher; Gustafson, Chloe; Kim, Ok-Sun; Li, Wei; Michaud, Alex; Patterson, Molly O.; Tranter, Martyn; Venturelli, Ryan; Vick-Majors, Trista; Elsworth, Cooper
    The Subglacial Antarctic Lakes Scientific Access (SALSA) Project accessed Mercer Subglacial Lake using environmentally clean hot-water drilling to examine interactions among ice, water, sediment, rock, microbes and carbon reservoirs within the lake water column and underlying sediments. A ~0.4 m diameter borehole was melted through 1087 m of ice and maintained over ~10 days, allowing observation of ice properties and collection of water and sediment with various tools. Over this period, SALSA collected: 60 L of lake water and 10 L of deep borehole water; microbes >0.2 μm in diameter from in situ filtration of ~100 L of lake water; 10 multicores 0.32–0.49 m long; 1.0 and 1.76 m long gravity cores; three conductivity–temperature–depth profiles of borehole and lake water; five discrete depth current meter measurements in the lake and images of ice, the lake water–ice interface and lake sediments. Temperature and conductivity data showed the hydrodynamic character of water mixing between the borehole and lake after entry. Models simulating melting of the ~6 m thick basal accreted ice layer imply that debris fall-out through the ~15 m water column to the lake sediments from borehole melting had little effect on the stratigraphy of surficial sediment cores.
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