Exploring Hydrogen Rich Venting Beneath Ice on an Ocean World - Field Report. German, C. R., Seewald, J., Curran, M., Jakuba, M., Branch, A., Klesh, A., Bowen, A., Chien, S., Hand, K. P., & Schlindwein, V. S. N. In AGU Fall Meeting Abstract 2023, San Francisco, California, December, 2023. ![Exploring Hydrogen Rich Venting Beneath Ice on an Ocean World - Field Report [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper abstract bibtex In July 2023 the Nereid Under Ice hybrid (autonomous/remotely operated) vehicle was used to explore submarine hydrothermal venting at two locations in the ice-covered Arctic Ocean, the Aurora hydrothermal field on the Gakkel Ridge and the Lucky B area in Lena Trough. These operations were conducted aboard FS Polarstern Cruise 137 ALOIS (Arctic Lithosphere Ocean Interaction Studies) where NUI, a CTD rosette and the OFOBS (camera and high resolution mapping instrument) were used to conduct hydrothermal investigations in concert with an extensive geophysics program that included seismology, aero-magnetics and heat-flow activities. Three NUI dives were conducted at the Aurora hydrothermal field, each of 9-10h duration including 2-4h of operations at the seafloor and at maximum horizontal separations away from the ship, under ice, of 1.4-2.1km. During the first dive we revisited the three previously known high temperature vents from Aurora and then set down and sampled at a new low-temperature vent site for mineralogy/microbiology. During our second dive we relocated to find three new high temperature vents including a conjugate pair of low and high temperature vents where we sampled for vent fluids. Our third dive started with high resolution bathymetric mapping of the entire system followed by completion of our fluid sampling program and, finally, bathymetry- and sensor-guided discovery of a series of three more low-temperature hydrothermal flow sites and four more high-temperature hydrothermal vents. After relocation to Lena Trough our final dive combined three separate phases of autonomous ocean sensing, autonomous seafloor mapping and a human-operated geological and biological reconnaissance traverse across the seafloor. This was our longest dive (10.33h in the water, 5.25h science operations at depth) and saw the ship travel 7.3km over that time, while NUI roamed up to 2.7km horizontally away from the ship.
@inproceedings{german-agu2023,
address = {San Francisco, California},
author = {Christopher R. German and Jeffery Seewald and Molly Curran and Michael Jakuba and Andrew Branch and Andrew Klesh and Andrew Bowen and Steve Chien and Kevin P. Hand and Vera S. N. Schlindwein},
booktitle = {AGU Fall Meeting Abstract 2023},
month = {December},
project = {ice\_covered\_oceans},
title = {Exploring Hydrogen Rich Venting Beneath Ice on an Ocean World - Field Report},
year = {2023},
url = {},
abstract = {In July 2023 the Nereid Under Ice hybrid (autonomous/remotely operated) vehicle was used to explore submarine hydrothermal venting at two locations in the ice-covered Arctic Ocean, the Aurora hydrothermal field on the Gakkel Ridge and the Lucky B area in Lena Trough. These operations were conducted aboard FS Polarstern Cruise 137 ALOIS (Arctic Lithosphere Ocean Interaction Studies) where NUI, a CTD rosette and the OFOBS (camera and high resolution mapping instrument) were used to conduct hydrothermal investigations in concert with an extensive geophysics program that included seismology, aero-magnetics and heat-flow activities. Three NUI dives were conducted at the Aurora hydrothermal field, each of 9-10h duration including 2-4h of operations at the seafloor and at maximum horizontal separations away from the ship, under ice, of 1.4-2.1km. During the first dive we revisited the three previously known high temperature vents from Aurora and then set down and sampled at a new low-temperature vent site for mineralogy/microbiology. During our second dive we relocated to find three new high temperature vents including a conjugate pair of low and high temperature vents where we sampled for vent fluids. Our third dive started with high resolution bathymetric mapping of the entire system followed by completion of our fluid sampling program and, finally, bathymetry- and sensor-guided discovery of a series of three more low-temperature hydrothermal flow sites and four more high-temperature hydrothermal vents. After relocation to Lena Trough our final dive combined three separate phases of autonomous ocean sensing, autonomous seafloor mapping and a human-operated geological and biological reconnaissance traverse across the seafloor. This was our longest dive (10.33h in the water, 5.25h science operations at depth) and saw the ship travel 7.3km over that time, while NUI roamed up to 2.7km horizontally away from the ship.}
}
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