The ALOHA Wirewalker project is a collection of autonomous oceanographic observations from the North Pacific Ocean that are obtained with two wave-powered drifting profilers (Wirewalker™, Del Mar Oceanographic) since June 2017. The autonomous profilers are deployed in the open ocean where they move vertically along a wire that is suspended between a float at the sea surface and a weight placed at 400 m depth. The system horizontal displacement follows the ocean currents. These observations allow the investigation of the diel ecosystem variability and the study of the formation and maintenance of relatively thin layers of plankton accumulation thanks to the high resolution both vertically (~0.1 m) and temporally (1/6 s).
The Wirewalkers are deployed during expeditions of the Hawaii Ocean Time-series (HOT) where they complement shipboard measurements of the physical and biogeochemical characteristics of the ocean. Additionally, the Wirewalkers are deployed during the expeditions organized by the Simons Collaboration on Ocean Processes and Ecology ( SCOPE).
Measurements collected within the ALOHA Wirewalker project have been processed using a consistent procedure in order to facilitate the joint analysis of the observations from different deployments. The ALOHA Wirewalker dataset from June 2017 to February 2020 is now public and accessible as doi:10.5281/zenodo.3750468.
In the period between June 2017 and September 2020, the ALOHA Wirewalkers were deployed 24 times, for a cumulative duration of 91 days during which they collected a total of 4392 vertical profiles from 0 to 400 m (Table 1). All deployments were in the North Pacific Ocean, north of the Hawaiian archipelago. Most deployments took place during HOT cruises and lasted between 1.2 and 4.0 days. Five deployments took place during SCOPE cruises (MESO-SCOPE, Eddy Experiment, Gradients 3) and lasted up to 13.1 days.
The two Wirewalkers were used for a similar number of deployments. The Wirewalker mounting the data logger RBR Maestro 80330 was deployed during 12 cruises, while the Wirewalker mounting RBR Maestro 80331 was also deployed during 12 cruises.
|MESOSCOPE a||KM1709||2017-06-30 06:30||12.50||595||80331|
|MESOSCOPE b||KM1709||2017-07-01 18:43||13.12||632||80330|
|Eddy Experiment a||FK180310||2018-03-15 21:03||12.92||630||80330|
|Eddy Experiment b||FK180310||2018-03-29 01:10||6.85||297||80330|
|Gradients 3||KM1906||2019-04-16 07:58||2.48||112||80330|
|Instrument||Date & link|
|Maestro 80330||Feb 12, 2019
Jun 2, 2017
|Maestro 80331||Oct 26, 2018
Jun 5, 2017
|Eco Puck 1576||Jun 8, 2017
Apr 29, 2020
|Eco Puck 1577||Jun 8, 2017|
|C-star 1812PR||May 23, 2017
June 13, 2019
|C-star 1825PR||Jun 1, 2017
Oct 24, 2019
|OCR504 505||Nov 9, 2017|
|OCR504 506||Nov 9, 2017
Mar 30, 2020
|Rinko III 281||Dec 7, 2016|
|Rinko III 282||Dec 13, 2016|
Daniel K. Inouye Center for Microbial Oceanography: Research and Education
University of Hawaii at Manoa
1950 East-West Road, Honolulu, Hawaii 96822
For information contact Benedetto Barone