Multibeam bathymetry of Pao Pao Seamount (right) and an unnamed guyot (left) shows one example of nearby seamounts with very different geomorphology. Pao Pao Seamount comes to a very sharp peak at around 300 meters and shows steep flanks while the unnamed feature has a distinct flat top. Biological communities we find on these features may differ greatly at similar depth intervals despite being only 25 kilometers apart from each other.

Multibeam bathymetry of Pao Pao Seamount (right) and an unnamed guyot (left) shows one example of nearby seamounts with very different geomorphology. Pao Pao Seamount comes to a very sharp peak at around 300 meters and shows steep flanks while the unnamed feature has a distinct flat top. Biological communities we find on these features may differ greatly at similar depth intervals despite being only 25 kilometers apart from each other. Image courtesy of the NOAA Office of Ocean Exploration and Research, Discovering the Deep: Exploring Remote Pacific MPAs. Download larger version (jpg, 810 KB).

Filling in Gaps Along the Way
March 9, 2017

The Okeanos Explorer began transiting from Swains Island to Pao Pao Seamount in the Tokelau Seamount Chain which will be our first dive in the waters of New Zealand's Territory of Tokelau. During the roughly 36 hours of transit, the ship collected data with three different types of sonar. You can learn more about these sonars and how the ship maps the seafloor by reading this mission log. This additional mapping will help to fill in the data gaps at the various seamounts. The updated depths of Pao Pao Seamount in particular allowed the scientists to further refine the dive track for the upcoming remotely operated vehicle dive. The scientists hope the Pao Pao Seamount will be an interesting shallow dive starting at about 530 meters. The dive track will begin along the northern ridge of Pao Pao seamount and proceed upslope to the crest of the seamount summit at about 270 meters. The goal of this dive is to continue surveying for fish of commercial importance, as well as characterize deep-sea coral, sponge communities, and seafloor substrate.