Tag: ASHES

Monitoring heat output at ASHES

Over twenty years ago, I was invited to join a team of geologists, acousticians (physicists who study sound), and engineers and help develop instrumentation that can measure the heat content in hot springs on underwater volcanoes. To a geologist

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Mushroom Orifice Booming

The orifice at the base of the hydrothermal chimney called Mushroom is marked by a strong jet of high temperature hydrothermal fluid. Sulfide worms, scale worms and limpets are bathed in a mixture of the high temperature fluid and seawater. Credit: UW/NSF-OOI/WHOI, V18.

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2018 Lights On Again

The UW-APL-built high definition camera lights up the 12-13 ft tall hot spring deposit called Mushroom, nearly 5000 ft beneath the oceans surface at the summit of Axial Seamount. Credit: UW/NSF-OOI/WHOI,V18.

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Lights on At Axial Seamount

LED lights on the high definition camera, built by the Applied Physics Laboratory at the University of Washington, light up a > 1 m tall, young black smoker chimney at the base of the actively venting Mushroom edifice on Axial Seamount (water depth ~1500 m). The image, taken with the ROV Jason, shows the camera being tested by UW engineers during VISIONS16. They were in the Operations Center, located >300 miles to the east at the School of Oceanography. Here, they were commanding/controlling the camera live through the terrestrial and submarine Internet as part of the NSF Cabled Array infrastructure. Credit: UW/NSF-OOI/WHOI; V16.

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Osmotic Fluid Sampler in ASHES

A new osmotic fluid sampler is about to be installed in a diffuse flow site hosting a 3D temperature array in the ASHES Hydrothermal Field on the summit of Axial Seamount. Each year, as part of the annual operations and maintenance cruise, a sampler is recovered and a new one installed. Onshore analyses of the entrapped fluids provide insights on the evolution of fluid chemistry in time, in response to changing environmental conditions e.g. earthquakes, temperature, microbial utilization of gases and different elements. Credit: UW/NSF-OOI/WHOI; V16.

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Making Connections in Extreme Environments

The ROV Jason "looks" at a hybrid underwater wet-mate connector that connects the high definition camera to a ~ 4 km long extension cabled attached to Primary Node PN3B at the summit of Axial Seamount. This connection provides a 10 Gbs communication path to the terrestrial Internet located >300 miles to the east. White bacterial mats line fractures in the lava-covered seafloor where diffusely flowing fluids are exiting the seafloor. Credit: UW/NSF-OOI/WHOI; V16.

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High Definition Camera Reinstalled

The high definition camera, built by the UW Applied Physics Lab, was reinstalled in 2016 during the VISIONS'16 cruise. The prior camera had been streaming video live to shore for two years. The camera was recovered to clear the outer window of biofouling. The camera is located at the hydrothermal chimney called Mushroom in the ASHES hydrothermal field on Axial Seamount. Video are streamed live from ~5000 ft down and >300 miles offshore onto the Internet 8 times a day. Credit: UW/NSF-OOI/WHOI; V16.

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3D Temperature Array and Life

A 3D temperature (thermistor) array housing 24 sensors rests above a small diffuse flow site a few meters away from the actively venting black smoker edifice called Mushroom in the ASHES hydrothermal field on Axial Seamount. This cabled instrument was designed and built by G. Proskurowski, UW School of Oceanography. Limpets have colonized the frame and cable housing the thermistors. An osmotic fluid sampler is inserted into the diffuse flow site to obtain chemistry coregistered with temperature. Credit: UW/NSF-OOI/WHOI; V16. 

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Dive R1835 Highlights ASHES Vent Field

During ROPOS Dive R1835, the high definition camera was turned at the Mushroom chimney and the osmo fluid sampler was turned that was inserted into the 3D temperature array. A small MAPR temperature was recovered from the base of the 3D temperature array. The HD camera was tested and ROPOS conducted a video survey of some of the chimneys – Mushroom, Inferno, Phoenix, and Anenome. The HD camera came up rapidly during testing from shore. Credit: NSF-OOI/UW/ISS; Dive R1835; V15.

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Sampling Fluids for a Year

An Osmotic fluid sampler is installed in a small diffuse flow site hosting abundant tubeworms, limpets, and palm worms in the ASHES hydrothermal fluid. When recovered next year, the fluids this sampler host will provide information on how vent fluid chemistry changes over time. Credit: NSF-OOI/UW/ISS; Dive R1835; V15.

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