@article {Tontini2016,
	title = {{Crustal magnetization and the subseafloor structure of the ASHES vent field, Axial Seamount, Juan de Fuca Ridge: Implications for the investigation of hydrothermal sites}},
	journal = {Geophysical Research Letters},
	volume = {43},
	year = {2016},
	pages = {6205{\textendash}6211},
	abstract = {High-resolution geophysical data have been collected using the Autonomous Underwater Vehicle (AUV) Sentry over the ASHES (Axial Seamount Hydrothermal Emission Study) high-temperature ({\~{}}348{\textdegree}C) vent field at Axial Seamount, on the Juan de Fuca Ridge. Multiple surveys were performed on a 3-D grid at different altitudes above the seafloor, providing an unprecedented view of magnetic data resolution as a function of altitude above the seafloor. Magnetic data derived near the seafloor show that the ASHES field is characterized by a zone of low magnetization, which can be explained by hydrothermal alteration of the host volcanic rocks. Surface manifestations of hydrothermal activity at the ASHES vent field are likely controlled by a combination of local faults and fractures and different lava morphologies near the seafloor. Three-dimensional inversion of the magnetic data provides evidence of a vertical, pipe-like upflow zone of the hydrothermal fluids with a vertical extent of {\~{}}100 m.},
	keywords = {AUV Sentry (Autonomous Underwater Vehicle)},
	doi = {10.1002/2016GL069430},
	author = {Tontini, F C and Crone, T J and de Ronde, C E J and Fornari, D J and Kinsey, J C and Mittelstaedt, E and Tivey, M K}
}
@article {Mittelstaedt2016,
	title = {{Diffuse venting at the ASHES hydrothermal field: Heat flux and tidally modulated flow variability derived from in situ time-series measurements}},
	journal = {Geochemistry, Geophysics, Geosystems},
	volume = {17},
	year = {2016},
	pages = {1435{\textendash}1453},
	abstract = {Time-series measurements of diffuse exit-fluid temperature and velocity collected with a new, deep-sea camera, and temperature measurement system, the Diffuse Effluent Measurement System (DEMS), were examined from a fracture network within the ASHES hydrothermal field located in the caldera of Axial Seamount, Juan de Fuca Ridge. The DEMS was installed using the HOV Alvin above a fracture near the Phoenix vent. The system collected 20 s of 20 Hz video imagery and 24 s of 1 Hz temperature measurements each hour between 22 July and 2 August 2014. Fluid velocities were calculated using the Diffuse Fluid Velocimetry (DFV) technique. Over the similar to 12 day deployment, median upwelling rates and mean fluid temperature anomalies ranged from 0.5 to 6 cm/s and 0 degrees C to similar to 6.5 degrees C above ambient, yielding a heat flux of 0.29 +/- 0.22 MW M-2 and heat output of 3.1 +/- 2.5 kW. Using a photo mosaic to measure fracture dimensions, the total diffuse heat output from cracks across ASHES field is estimated to be 2.05 +/- 1.95 MW. Variability in temperatures and velocities are strongest at semidiurnal periods and show significant coherence with tidal height variations. These data indicate that periodic variability near Phoenix vent is modulated both by tidally controlled bottom currents and seafloor pressure, with seafloor pressures being the dominant influence. These results emphasize the importance of local permeability on diffuse hydrothermal venting at mid-ocean ridges and the need to better quantify heat flux associated with young oceanic crust.},
	keywords = {AUV Sentry (Autonomous Underwater Vehicle), HOV Alvin (Human Occupied Vehicle)},
	doi = {10.1002/2015GC006144},
	author = {Mittelstaedt, E and Fornari, D J and Crone, T J and Kinsey, J C and Kelley, D S and Elend, M J}
}
@article {Fornari2004a,
	title = {{Realizing the dreams of da Vinci and Verne: a diverse fleet of innovative deep-submergence vehicles heralds a new era of ocean exploration}},
	journal = {Oceanus},
	volume = {42},
	number = {2},
	year = {2004},
	pages = {20{\textendash}24},
	keywords = {AUV ABE (Autonomous Benthic Explorer), AUV Sentry (Autonomous Underwater Vehicle)},
	issn = {0029-8182},
	author = {Fornari, D J}
}
