Measurements of Diffuse Hydrothermal Flow
Endeavour Segment, Juan de Fuca Ridge
From 2000–2003, the Thermal Grid project used MAVS3 acoustic current meters located about 0.5 m above the seafloor, equipped with one-meter-long thermistor strings, to collect multiday time series of near-bottom temperature, vertical temperature gradient, three-component velocity, and turbulent heat flux at diverse sites within the axial valley of the Endeavour Segment of the Juan de Fuca Ridge spreading center in the northeast Pacific.

In the figures, velocity is represented by horizontal flow speed/direction along with vertical component of velocity, the latter typically associated with flow next to a sloping seafloor. Heat flux is calculated via direct correlation, using ~ 2 Hz vertical velocity and temperature data, averaged over 17 minute ensembles.

Click on the map below to access figures and data from each deployment.
Map HR B CB MF R CV

If you use the figures or data, please cite:

and for individual results as appropriate from:

Funding was provided by National Science Foundation (NSF) grants OCE-9911523 and OCE-0085615 and the University of Washington Royalty Research Fund (RRF).

Website created with assistance from
Caiti Guerin
UW Undergraduate Research Assistants
Patrick Old