Known as the "Res Probe," this novel seafloor instrument is designed to go inside the "throats" of high-temperature (>400°C) black smoker chimneys to measure the resistivity and temperature of the hydrothermal vent flu
Some of the most profound discoveries in marine research will be made in understanding the linkages among microbes that thrive beneath the seafloor and in vent fluids associated with active submarine volcanoes. To make progress in this research
Only very rarely has there ever been long-term (~1-year) imagery taken of methane seep, and hydrothermal vent sites, nor has the upper water column in the NE Pacific been imaged. Yet the information digital stills provide is crucial to understan
Dissolved oxygen is the most well-known gas in ocean waters: several types of sensors are commercially available. These include membrane Clark-type cells and optode sensors. The OOI program uses both types of oxygen sensors on different pl
The sensor measures pH (total concentration of hydrogen ions) in the marine environments spanning the Cabled Array. For tens of millions of years, Earth's oceans have maintained a relatively stable pH level. Instruments on the Cabled A
The pCO2 sensor measures the partial pressure of carbon dioxide (pCO2) from 150-700 μatm in the upper 200 m of the water column on the Shallow Profiling Moorings at the Slope Base and Axial Base sites, and on the Benthic
The Bottom Pressure and Tilt platform measures the inflation and deflation of the seafloor at the summit of Axial Seamount: streaming data allow forecasting of the next eruption
Long term measurements of fluid chemistry are critical to understanding hydrothermal and methane seep environments because fluid chemistry impacts and is impacted by reactions in hydrothermal chimneys, in seep sediments, and by the associated bi
The Horizontal Electrometer-Pressure-Inverted Echosounder (HPIES) is an instrument that utilizes a bottom pressure sensor, a 12-kHz inverted echosounder and a horizontal electrometer to measure the horizontal electrical field…
