Near-bottom AUV Sentry processed bathymetry grids (ESRI ASCII format) from the Pythia's Oasis methane seep site

Pythia's Oasis is a methane seep site 60 nautical miles off the coast of Oregon. This site is different from other seep sites. It hosts a discrete orifice that has continually vented low-salinity, hydrocarbon-bearing fluids since 2015 and is still active as of August of 2022. The site was discovered in 2015 during a Regional Cabled Array (RCA) Operations and Maintenance Cruise using hull-mounted sonar on R/V Thompson to detect methane bubble plumes in the water column. In 2019, near-bottom swath bathymetry data were collected using a Reson 7125 multibeam sonar system mounted on AUV Sentry during Pythia's Oasis Cruise AT42-17. Six AUV Sentry sonar surveys were conducted. The data were processed and two bathymetric data sets were produced: One is a 2,600 meter by 2,400 meter composite of data from all AUV dives gridded at 1-meter resolution (file name po_a_s19agcs.asc) and the other is a 1,500 meter by 800 meter data set from a low-altitude dive gridded at 0.25 meters (file name po_a_s19bgcs.asc). The grids presented here are in ESRI ASCII format. Funding was provided by National Science Foundation award OCE16-58201.