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Participant Information

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Applications are being solicited for the following International Ocean Discovery Program expeditions.

Expedition 378: South Pacific Paleogene Climate
Application deadline: 15 September 2017

Expedition 378 will investigate the record of Cenozoic climate and oceanography through a drilling transect in the far southern Pacific Ocean. In particular, it will target sediments deposited during the very warm Late Paleocene and Early Eocene including the Paleocene-Eocene boundary, as well as the Eocene-Oligocene transition to investigate how the Eocene earth maintained high global temperatures and high heat transport to the polar regions despite receiving near modern levels of solar energy input. Investigation of the recovered sediments also will constrain the subpolar Pacific climate, oceanographic structure, and biogeochemical cycling of much of the Cenozoic. These sediments will be used to characterize water masses, deep and shallow ocean temperature, latitudinal temperature gradients, the strength of upwelling, and the strength of the zonal winds to study both the atmospheric and oceanic climatic subsystems.

The planned drilling strategy also will target a continuous sedimentary record at DSDP Site 277 by redrilling a previously spot-cored, classic Paleogene high latitude site. This will provide a crucial, continuous record of the shallow subantarctic South Pacific from the Paleocene to late Oligocene.

This expedition in the South Pacific Ocean is critical to contribute to global reconstructions of the early Cenozoic since appropriate high-latitude records are unobtainable in the Northern Hemisphere of the Pacific. The drilling strategy optimizes the recovery of Paleogene carbonates buried under red clay sequences at present latitudes of 50°S to permit a full range of paleoceanographic proxy-based investigations.

This expedition will also constrain (a) the Southern Ocean CCD history, (b) the record of Antarctic ice cover for the Paleogene through IRD characterization, (c) the development of the Antarctic Circumpolar Current, (d) the poleward extent of the low-productivity sub-tropical gyre, (e) the position of the polar front, (f) sea-surface temperatures and thermal gradients, (g) the breadth and intensity of the high-productivity zone associated with these oceanographic features, (h) the water masses formed in the sub-polar region, (i) the zonal winds and how they relate to oceanic surface circulation, and (j) document the changes in these systems as climate evolves from the warm early Eocene to the cold Antarctic-influence system of the Oligocene.

Original proposal: 567-Full4 PDF

Expedition 379: Amundsen Sea West Antarctic Ice Sheet History
Application deadline: 15 October 2017

The West Antarctic Ice Sheet (WAIS) is largely marine-based, highly sensitive to climatic and oceanographic changes, has had a dynamic history over the last several million years, and if completely melted, could result in a global sea-level rise of 3.3–4.3 m. Expedition 379 will obtain records from the continental shelf and rise of the Amundsen Sea to document WAIS dynamics in an area unaffected by other ice sheets as well and that currently experiences the largest ice loss in Antarctica. The primary objectives include (a) reconstructing the Paleogene to Holocene glacial history of West Antarctica, (b) correlating the Amundsen Sea WAIS-proximal records with global records of ice volume changes and air/seawater temperature proxy records, (c) constraining the relationship between incursions of warm water masses onto the continental shelf and the stability of marine-based ice sheet margins, and (d) reconstructing major WAIS advances onto the middle and outer shelf, including the first ice sheet expansion onto the continental shelf of the Amundsen Sea Embayment and its possible control by the uplift of Marie Byrd Land.

Original proposals: 839 Full & 839 Add PDF

Expedition 382: Iceberg Alley Paleoceanography & South Falkland Slope Drift
Application deadline: 15 October 2017

Expedition 382 aims to recover 600 m long Late Neogene sedimentary sequences from the Scotia Sea to reconstruct past variability in Antarctic Ice Sheet (AIS) mass loss, oceanic and atmospheric circulation and to provide the first spatially integrated record of variability in iceberg flux from Iceberg Alley, where a substantial number of Antarctic icebergs exit into the warmer Antarctic Circumpolar Current (ACC). This will (a) constrain iceberg flux during key times of AIS evolution since the Middle Miocene glacial intensification of the East Antarctic Ice Sheet, (b) provide material to determine regional sources of AIS mass loss, address interhemispheric phasing of ice-sheet and climate events, and the relation of AIS variability to sea level, (c) provide information on Drake Passage throughflow, meridional overturning in the Southern Ocean, water-mass changes, CO2 transfer via wind-induced upwelling, sea-ice variability, bottom water outflow from the Weddell Sea, Antarctic weathering inputs, and changes in oceanic and atmospheric fronts in the vicinity of the ACC, and (d) provide dust proxy records to reconstruct changes in the Southern Hemisphere westerlies to evaluate climate-dust coupling since the Pliocene, its potential role in iron fertilization and atmospheric CO2 drawdown during glacials. Expedition 382 will also core a sediment drift on the Falkland slope to obtain subantarctic multi-proxy intermediate water depth records of millennial to orbital scale variability in the ocean, atmosphere, nutrients, productivity and ice-sheet dynamics in the SW Atlantic through at least the last 1 Ma.

Original proposals: 902 Full, 902 Add, 902 Add2, 846 APL2, & 846 Add PDF

Who should apply

Opportunities exist for researchers (including graduate students) in all shipboard specialties—including but not limited to sedimentologists, micropaleontologists, paleomagnetists, inorganic/organic geochemists, petrologists, petrophysicists, microbiologists, and borehole geophysicists.

Where to apply, IODP Program Member Offices

Staffing information

IODP expeditions map

See complete International Ocean Discovery Program expedition maps.