The HALE-ALOHA mooring is a surface-to-bottom mooring located off the coast of Hawai'i (22^o30'N,158^oW).  A map of the general location and other nearby oceanographic stations can be found at the Hawaiian Ocean Time-Series (HOT) web site.  Further details of the mooring and other instruments attached to it can also be found at the HOT web site.  Monthly cruises are also made to the mooring to provide ancillary data. 

Retrieval of the HALE-ALOHA mooring (Nov 1998).

An OCI-200 irradiance meter (Satlantic, Inc.) was attached to the mooring at 25 m depth.  This instrument measures downwelling irradiance at seven wavebands with 10 nm bandpasses in the visible.   In 1997, the instrument used made measurements at 412, 443, 490, 510, 555, 670, and 683 nm every 20 minutes.  From 1998 onwards, measurements were made at 412, 443, 490, 555, 670, 683, and 700 nm every 10 minutes.  The instrument is calibrated by Satlantic, Inc.  The sensors are cleaned between deployments.

Biofouling on the OCI-200 irradiance sensors after 6 months deployment (Nov 1998).

Webpage  by Jasmine S. Bartlett, Oregon State University.