Oregon State University logo  University of Hawaii at Manoa logo     Pump Experiment
Glider image
On May 30, 2008 a set of four pumps was deployed just north of the Hawaiian Islands.  This drifting array of pumps (attached to long flexible vertical tubes) transfers nutrient-rich water from 300 m depth up to the nutrient-poor surface waters.  The objectives of this experiment are to: 1) determine whether these pumps work, 2) assess if a  phytoplankton bloom can be stimulated in this oceanic region by the use of these pumps, and 3) characterize the successional response of the pelagic microbial assemblage to these perturbations. 

To complement the pumps, three gliders were also deployed to measure any changes in the water column.  In their present configuration the gliders dive continuously to 500 m depth, returning to the surface to relay the measurements via satellite after each dive.  Measurements of both physical and biological ocean properties are made (temperature, salinity, pressure, oxygen, chlorophyll and scattering). 

Near real-time satellite imagery also provides information about changes in the surface waters.

This site presents figures of these measurements as they are received in real-time.

figures figures

The glider/pump deployment and data processing is a joint effort between the University of Hawaii and Oregon State University.  Additional information about the glider can be found at the University of Hawaii website: http://hahana.soest.hawaii.edu/oppex/index.html

Website by Jasmine S. Nahorniak, Oregon State University.