Four seafloor benchmarks were deployed with ROV Jason2 at frequently visited areas along the\u00a0northern East Pacific Rise (NEPR) ridge crest near 9\u00b050’N, within the Ridge2000 EPR integrated study site\u00a0(ISS) bull\u2019s eye. When used in concert with established deep-ocean acoustic positioning techniques, these\u00a0benchmarks provide navigational infrastructure to facilitate the integration of near-bottom data at this site\u00a0by allowing efficient and quantitative coregistration of data and observations collected on multiple dives\u00a0and over multiple cruises. High-resolution, near-bottom multibeam bathymetric surveys also were\u00a0conducted along and across the ridge crest to provide a morphological and geological context for the\u00a0benchmark areas. We describe the navigation and data processing techniques used to constrain the\u00a0benchmark positions and outline operational details to effectively use benchmarks at this and other deep-ocean sites where multidisciplinary time series studies are conducted. The well-constrained positions of the benchmarks provide a consistent geospatial framework that can be used to limit navigational uncertainties\u00a0during seafloor sampling and mapping programs and enable accurate spatial coregistration and \u00a0integration\u00a0of observations. These data are important to test a range of multidisciplinary hypotheses that seek to link\u00a0geological, chemical, and biological processes associated with crustal accretion and energy transfer from\u00a0the mantle to the hydrosphere at mid-ocean ridges.<\/p>\n","protected":false},"excerpt":{"rendered":"
Navigational infrastructure at the East Pacific Rise 9 50’N area following the 2005-06 eruption: seafloor benchmarks and high-resolution multibeam surveys S.A. Soule, V.L. Ferrini, J.C. Kinsey, D.J. Fornari, C. Sellers, S.M. White, K. Von Damm, S.M. Carbotte. Geochemisty, Geophysics, Geosystems, 9, Q11T04, 2008. Four seafloor benchmarks were deployed with ROV Jason2 at frequently visited areas…<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":23,"menu_order":10,"comment_status":"closed","ping_status":"closed","template":"","meta":[],"_links":{"self":[{"href":"https:\/\/www2.whoi.edu\/site\/jameskinsey\/wp-json\/wp\/v2\/pages\/737"}],"collection":[{"href":"https:\/\/www2.whoi.edu\/site\/jameskinsey\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www2.whoi.edu\/site\/jameskinsey\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www2.whoi.edu\/site\/jameskinsey\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www2.whoi.edu\/site\/jameskinsey\/wp-json\/wp\/v2\/comments?post=737"}],"version-history":[{"count":2,"href":"https:\/\/www2.whoi.edu\/site\/jameskinsey\/wp-json\/wp\/v2\/pages\/737\/revisions"}],"predecessor-version":[{"id":739,"href":"https:\/\/www2.whoi.edu\/site\/jameskinsey\/wp-json\/wp\/v2\/pages\/737\/revisions\/739"}],"up":[{"embeddable":true,"href":"https:\/\/www2.whoi.edu\/site\/jameskinsey\/wp-json\/wp\/v2\/pages\/23"}],"wp:attachment":[{"href":"https:\/\/www2.whoi.edu\/site\/jameskinsey\/wp-json\/wp\/v2\/media?parent=737"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}