This addendum to the International Ocean Discovery Program (IODP) Expedition 378 Scientific Prospectus details changes to the expedition schedule including additional drilling depth approvals and updates to the operations plans that were presented in the original prospectus. In September 2018, Expedition 378 was rescheduled for 2020 to accommodate the construction and installation of two new propellers for the vessel with minimal disruption to the slate of expeditions scheduled in the Southern Ocean. The change in expedition timing resulted in a change of the port of origination from Lyttelton, New Zealand, to Lautoka, Fiji, and a change in the number of transit days. Consequently, the operations schedule has been revised. The other development prompting an addendum to the Expedition 378 Scientific Prospectus was the approval by the Environmental Protection and Safety Panel (EPSP) to drill deeper at Deep Sea Drilling Project (DSDP) Site 277 than the previous approved maximum depth of 480 meters below seafloor (mbsf) (now approved to 670 mbsf).
Scientific Prospectus Addendum: Dynamics of the Pacific Circumpolar Current (DYNAPACC)
This addendum to the International Ocean Discovery Program (IODP) Expedition 383 Scientific Prospectus (Dynamics of the Pacific Antarctic Circumpolar Current; Lamy et al., 2018) addresses the results of the safety review of 10 new proposed drill sites by the IODP Environmental Protection and Safety Panel (EPSP) on 4–6 September 2018 and a change to the operations plan and the end port call for Expedition 383. Because of an adjustment to the R/V JOIDES Resolution 2018–2019 operations schedule, the end port for Expedition 383 has changed from Valparaiso, Chile, to Punta Arenas, Chile. Therefore, at the time of publication of this addendum, the expedition is scheduled to start and end in Punta Arenas, Chile. The dates of the expedition remain unchanged from the original Expedition 383 Scientific Prospectus (Lamy et al., 2018), from 20 May to 20 July 2019. The change in port reduces the distance and hence the transit time between the last drill site in the central South Pacific and the port in Chile, providing ~3 additional days for scientific drilling operations. For that reason, a new proposed primary site (CSP-7A) in the central South Pacific has been added to the original operations plan from Lamy et al. (2018), bringing more »
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