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Observations and Modeling of a Hydrothermal Plume in Yellowstone Lake
Stockholm University, Faculty of Science, Department of Geological Sciences.
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Number of Authors: 62019 (English)In: Geophysical Research Letters, ISSN 0094-8276, E-ISSN 1944-8007, Vol. 46, no 12, p. 6435-6442Article in journal (Refereed) Published
Abstract [en]

Acoustic Doppler current profiler and conductivity-temperature-depth data acquired in Yellowstone Lake reveal the presence of a buoyant plume above the Deep Hole hydrothermal system, located southeast of Stevenson Island. Distributed venting in the similar to 200 x 200-m hydrothermal field creates a plume with vertical velocities of similar to 10 cm/s in the mid-water column. Salinity profiles indicate that during the period of strong summer stratification the plume rises to a neutral buoyancy horizon at similar to 45-m depth, corresponding to a similar to 70-m rise height, where it generates an anomaly of similar to 5% (-0.0014 psu) relative to background lake water. We simulate the plume with a numerical model and find that a heat flux of 28 MW reproduces the salinity and vertical velocity observations, corresponding to a mass flux of 1.4 x 10(3) kg/s. When observational uncertainties are considered, the heat flux could range between 20 to 50 MW.

Place, publisher, year, edition, pages
2019. Vol. 46, no 12, p. 6435-6442
Keywords [en]
hydrothermal plume
National Category
Earth and Related Environmental Sciences
Identifiers
URN: urn:nbn:se:su:diva-172027DOI: 10.1029/2019GL082523ISI: 000477616300032OAI: oai:DiVA.org:su-172027DiVA, id: diva2:1346330
Available from: 2019-08-27 Created: 2019-08-27 Last updated: 2019-08-27Bibliographically approved

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