Program and Agenda

Abstract

VENUS OCEAN OBSERVATORY MEASUREMENTS OF BENTHIC OXYGEN AND HEAT FLUXES

An eddy correlation system was installed on the VENUS cabled subsea network to provide time-series measurements for estimating benthic oxygen and heat fluxes. The study site is located at 104 m depth in Saanich Inlet, a fjord on the west coast of Canada, characterized by seasonal hypoxia. The instrumentation, a Rockland Scientific microSquid coupled to a Nortek ADV, was deployed by ROV in spring of 2013. The result to date is an unprecedented, 4-month 32-Hz acquisition of oxygen, temperature, and velocity data. Illustrative are results for a week in the early summer, during the transitional waning of oxygen, that show a dynamic edge effect between two distinct water masses. The near bottom oxygen and temperature during this period were inversely correlated and varied from 10 to 67 µM and 8.5 to 8.8 °C. Current speed means, derived for 30-min bursts, ranged from 0.2 to 3 cm s-1. The EC fluxes of oxygen and heat across the bottom boundary were -1.6 ± 4.7 mmol m-2 d-1 and 0.004 ± 0.027 °C m-2 d-1 (SD, n=56), respectively. This international collaborative study demonstrates the potential for the eddy correlation method to be a valuable addition to ocean observatories.

ePoster: http://www.eposters.net/pdfs/venus-ocean-observatory-measurements-of-benthic-oxygen-and-heat-fluxes.pdf

Authors

Sanders, R. D., OSU College of Earth Ocean and Atmospheric Sciences, USA, rsanders@coas.oregonstate.edu

Reimers, C. E., OSU College of Earth Ocean and Atmospheric Sciences, USA, creimers@coas.oregonstate.edu

Albright, A., OSU College of Earth Ocean and Atmospheric Sciences, USA, aalbrigh@coas.oregonstate.edu

Dewey, R., UV Victoria Experimental Network Under the Sea, Canada, rdewey@uvic.ca

Macoun, P., UV Victoria Experimental Network Under the Sea, Canada, pmacoun@uvic.ca

Details

Poster presentation

Session #:117
Date: 2/27/2014
Time: 16:00 - 18:00
Location: Poster/Exhibit Hall

Presentation is given by student: No

PosterID: 534