International Ocean Discovery Program; Expedition 361 preliminary report; South African climates (Agulhas LGM density profile); 30 January-31 March 2016

Ian R. Hall, Sidney R. Hemming (Editor), Leah J. LeVay (Editor), Stephen R. Barker (Editor), Melissa A. Berke (Editor), Luna Brentegani (Editor), Thibaut Caley (Editor), Alejandra Cartagena-Sierra (Editor), Christopher D. Charles (Editor), Jason J. Coenen (Editor), Julien G. Crespin (Editor), Allison M. Franzese (Editor), Jens Gruetzner (Editor), Han Xibin (Editor), Sophia K. V. Hins (Editor), Francisco J. Jimenez Espejo (Editor), Janna Just (Editor), Andreas Koutsodendris (Editor), Kaoru Kubota (Editor), Nambiyathodi Lathika (Editor) & 9 others Richard D. Norris, Thiago Pereira dos Santos, Rebecca Robinson, John M. Rolison, Margit H. Simon, Deborah Tangunan, Jeroen (H,) J. L. van der Lubbe, Masako Yamane, Zhang Hucai

Research output: Book / ReportBookAcademic

Abstract

International Ocean Discovery Program (IODP) Expedition 361 drilled six sites on the southeast African margin and in the Indian-Atlantic ocean gateway, southwest Indian Ocean, from 30 January to 31 March 2016. In total, 5175 m of core was recovered, with an average recovery of 102%, during 29.7 days of on-site operations. The sites, situated in the Mozambique Channel at locations directly influenced by discharge from the Zambezi and Limpopo River catchments, the Natal Valley, the Agulhas Plateau, and Cape Basin, were targeted to reconstruct the history of the greater Agulhas Current system over the past ∼5 my. The Agulhas Current is the strongest western boundary current in the Southern Hemisphere, transporting some 70 Sv of warm, saline surface water from the tropical Indian Ocean along the East African margin to the tip of Africa. Exchanges of heat and moisture with the atmosphere influence southern African climates, including individual weather systems such as extratropical cyclone formation in the region and rainfall patterns. Recent ocean model and paleoceanographic data further point at a potential role of the Agulhas Current in controlling the strength and mode of the Atlantic Meridional Overturning Circulation (AMOC) during the Late Pleistocene. Spillage of saline Agulhas water into the South Atlantic stimulates buoyancy anomalies that act as control mechanisms on the basin-wide AMOC, with implications for convective activity in the North Atlantic and global climate change. The main objectives of the expedition were to establish the sensitivity of the Agulhas Current to climatic changes during the Pliocene-Pleistocene, to determine the dynamics of the Indian-Atlantic gateway circulation during this time, to examine the connection of the Agulhas leakage and AMOC, and to address the influence of the Agulhas Current on African terrestrial climates and coincidences with human evolution. Additionally, the expedition set out to fulfill the needs of the Ancillary Project Letter, consisting of high-resolution interstitial water samples that will constrain the temperature and salinity profiles of the ocean during the Last Glacial Maximum. The expedition made major strides toward fulfilling each of these objectives. The recovered sequences allowed generation of complete spliced stratigraphic sections that span from 0 to between ∼0.13 and 7 Ma. This sediment will provide decadal- to millennial-scale climatic records that will allow answering the paleoceanographic and paleoclimatic questions set out in the drilling proposal.
Original languageEnglish
Place of PublicationCollege Station, TX, United States
PublisherInternational Ocean Discovery Program, College Station, USA
Number of pages1
ISBN (Print)2372-9562
Publication statusPublished - 2016

Fingerprint

meridional circulation
climate
ocean
Pleistocene
human evolution
climate change
western boundary current
Last Glacial Maximum
basin
buoyancy
leakage
Southern Hemisphere
global climate
porewater
Pliocene
drilling
moisture
plateau
catchment
weather

Bibliographical note

Affiliation (analytic): Cardiff University, Department of Earth Sciences, Cardiff

Corporate Affiliation (monographic): International Ocean Discovery Program, Expedition 361 Scientists, College Station, TX

Coordinates: S311300 S311300 E0313243 E0313243; S412537 S412537 E0251538 E0251538; S154915 S154915 E0414607 E0414607; S192117 S192117 E0365454 E0365454; S254916 S254916 E0344610 E0344610; S350332 S350332 E0172404 E0172404

Contains 177 references

Research Program: IODP Integrated Ocean Drilling Program; IODP2 International Ocean Discovery Program

Document Type: Monograph

Bibliographic Level: Monograph

Source Note: Preliminary Report - International Ocean Discovery Program, Vol.361, 46p. Publisher: International Ocean Discovery Program, College Station, TX, United States. ISSN: 2372-9562

Copyright Information: GeoRef, Copyright 2017 American Geosciences Institute.

GeoRef ID: 2016051681

DOI: 10.14379/iodp.pr.361.2016

Keywords

  • Africa; Agulhas Current; Algae; Atlantic Meridional Overturning Circulation; Atlantic Ocean; Biostratigraphy; Cenozoic; Chemostratigraphy; Climate effects; Continental margin; Cores; Currents; Expedition 361; Foraminifera; IODP Site U1474; IODP Site U1475; IODP Site U1476; IODP Site U1477; IODP Site U1478; IODP Site U1479; Indian Ocean; International Ocean Discovery Program; Invertebrata; Last glacial maximum; Lithostratigraphy; Magnetostratigraphy; Marine sediments; Microfossils; Mozambique Channel; Nannofossils; Neogene; Ocean circulation; Ocean currents; Paleo-oceanography; Paleoclimatology; Paleomagnetism; Physical properties; Plantae; Pleistocene; Pliocene; Protista; Quaternary; Sediments; South Atlantic; Southeast Atlantic; Southern Africa; Tertiary
  • 12 Stratigraphy, Historical Geology and Paleoecology

Cite this

Hall, I. R., Hemming, S. R. (Ed.), LeVay, L. J. (Ed.), Barker, S. R. (Ed.), Berke, M. A. (Ed.), Brentegani, L. (Ed.), ... Hucai, Z. (Ed.) (2016). International Ocean Discovery Program; Expedition 361 preliminary report; South African climates (Agulhas LGM density profile); 30 January-31 March 2016. College Station, TX, United States: International Ocean Discovery Program, College Station, USA.
Hall, Ian R. ; Hemming, Sidney R. (Editor) ; LeVay, Leah J. (Editor) ; Barker, Stephen R. (Editor) ; Berke, Melissa A. (Editor) ; Brentegani, Luna (Editor) ; Caley, Thibaut (Editor) ; Cartagena-Sierra, Alejandra (Editor) ; Charles, Christopher D. (Editor) ; Coenen, Jason J. (Editor) ; Crespin, Julien G. (Editor) ; Franzese, Allison M. (Editor) ; Gruetzner, Jens (Editor) ; Xibin, Han (Editor) ; Hins, Sophia K. V. (Editor) ; Jimenez Espejo, Francisco J. (Editor) ; Just, Janna (Editor) ; Koutsodendris, Andreas (Editor) ; Kubota, Kaoru (Editor) ; Lathika, Nambiyathodi (Editor) ; Norris, Richard D. (Editor) ; Pereira dos Santos, Thiago (Editor) ; Robinson, Rebecca (Editor) ; Rolison, John M. (Editor) ; Simon, Margit H. (Editor) ; Tangunan, Deborah (Editor) ; van der Lubbe, Jeroen (H,) J. L. (Editor) ; Yamane, Masako (Editor) ; Hucai, Zhang (Editor). / International Ocean Discovery Program; Expedition 361 preliminary report; South African climates (Agulhas LGM density profile); 30 January-31 March 2016. College Station, TX, United States : International Ocean Discovery Program, College Station, USA, 2016. 1 p.
@book{ebb3b81b10894d16939c6c79bb3cfb33,
title = "International Ocean Discovery Program; Expedition 361 preliminary report; South African climates (Agulhas LGM density profile); 30 January-31 March 2016",
abstract = "International Ocean Discovery Program (IODP) Expedition 361 drilled six sites on the southeast African margin and in the Indian-Atlantic ocean gateway, southwest Indian Ocean, from 30 January to 31 March 2016. In total, 5175 m of core was recovered, with an average recovery of 102{\%}, during 29.7 days of on-site operations. The sites, situated in the Mozambique Channel at locations directly influenced by discharge from the Zambezi and Limpopo River catchments, the Natal Valley, the Agulhas Plateau, and Cape Basin, were targeted to reconstruct the history of the greater Agulhas Current system over the past ∼5 my. The Agulhas Current is the strongest western boundary current in the Southern Hemisphere, transporting some 70 Sv of warm, saline surface water from the tropical Indian Ocean along the East African margin to the tip of Africa. Exchanges of heat and moisture with the atmosphere influence southern African climates, including individual weather systems such as extratropical cyclone formation in the region and rainfall patterns. Recent ocean model and paleoceanographic data further point at a potential role of the Agulhas Current in controlling the strength and mode of the Atlantic Meridional Overturning Circulation (AMOC) during the Late Pleistocene. Spillage of saline Agulhas water into the South Atlantic stimulates buoyancy anomalies that act as control mechanisms on the basin-wide AMOC, with implications for convective activity in the North Atlantic and global climate change. The main objectives of the expedition were to establish the sensitivity of the Agulhas Current to climatic changes during the Pliocene-Pleistocene, to determine the dynamics of the Indian-Atlantic gateway circulation during this time, to examine the connection of the Agulhas leakage and AMOC, and to address the influence of the Agulhas Current on African terrestrial climates and coincidences with human evolution. Additionally, the expedition set out to fulfill the needs of the Ancillary Project Letter, consisting of high-resolution interstitial water samples that will constrain the temperature and salinity profiles of the ocean during the Last Glacial Maximum. The expedition made major strides toward fulfilling each of these objectives. The recovered sequences allowed generation of complete spliced stratigraphic sections that span from 0 to between ∼0.13 and 7 Ma. This sediment will provide decadal- to millennial-scale climatic records that will allow answering the paleoceanographic and paleoclimatic questions set out in the drilling proposal.",
keywords = "Africa; Agulhas Current; Algae; Atlantic Meridional Overturning Circulation; Atlantic Ocean; Biostratigraphy; Cenozoic; Chemostratigraphy; Climate effects; Continental margin; Cores; Currents; Expedition 361; Foraminifera; IODP Site U1474; IODP Site U1475; IODP Site U1476; IODP Site U1477; IODP Site U1478; IODP Site U1479; Indian Ocean; International Ocean Discovery Program; Invertebrata; Last glacial maximum; Lithostratigraphy; Magnetostratigraphy; Marine sediments; Microfossils; Mozambique Channel; Nannofossils; Neogene; Ocean circulation; Ocean currents; Paleo-oceanography; Paleoclimatology; Paleomagnetism; Physical properties; Plantae; Pleistocene; Pliocene; Protista; Quaternary; Sediments; South Atlantic; Southeast Atlantic; Southern Africa; Tertiary, 12 Stratigraphy, Historical Geology and Paleoecology",
author = "Hall, {Ian R.}",
editor = "Hemming, {Sidney R.} and LeVay, {Leah J.} and Barker, {Stephen R.} and Berke, {Melissa A.} and Luna Brentegani and Thibaut Caley and Alejandra Cartagena-Sierra and Charles, {Christopher D.} and Coenen, {Jason J.} and Crespin, {Julien G.} and Franzese, {Allison M.} and Jens Gruetzner and Han Xibin and Hins, {Sophia K. V.} and {Jimenez Espejo}, {Francisco J.} and Janna Just and Andreas Koutsodendris and Kaoru Kubota and Nambiyathodi Lathika and Norris, {Richard D.} and {Pereira dos Santos}, Thiago and Rebecca Robinson and Rolison, {John M.} and Simon, {Margit H.} and Deborah Tangunan and {van der Lubbe}, {Jeroen (H,) J. L.} and Masako Yamane and Zhang Hucai",
note = "Affiliation (analytic): Cardiff University, Department of Earth Sciences, Cardiff Corporate Affiliation (monographic): International Ocean Discovery Program, Expedition 361 Scientists, College Station, TX Coordinates: S311300 S311300 E0313243 E0313243; S412537 S412537 E0251538 E0251538; S154915 S154915 E0414607 E0414607; S192117 S192117 E0365454 E0365454; S254916 S254916 E0344610 E0344610; S350332 S350332 E0172404 E0172404 Contains 177 references Research Program: IODP Integrated Ocean Drilling Program; IODP2 International Ocean Discovery Program Document Type: Monograph Bibliographic Level: Monograph Source Note: Preliminary Report - International Ocean Discovery Program, Vol.361, 46p. Publisher: International Ocean Discovery Program, College Station, TX, United States. ISSN: 2372-9562 Copyright Information: GeoRef, Copyright 2017 American Geosciences Institute. GeoRef ID: 2016051681 DOI: 10.14379/iodp.pr.361.2016",
year = "2016",
language = "English",
isbn = "2372-9562",
publisher = "International Ocean Discovery Program, College Station, USA",

}

Hall, IR, Hemming, SR (ed.), LeVay, LJ (ed.), Barker, SR (ed.), Berke, MA (ed.), Brentegani, L (ed.), Caley, T (ed.), Cartagena-Sierra, A (ed.), Charles, CD (ed.), Coenen, JJ (ed.), Crespin, JG (ed.), Franzese, AM (ed.), Gruetzner, J (ed.), Xibin, H (ed.), Hins, SKV (ed.), Jimenez Espejo, FJ (ed.), Just, J (ed.), Koutsodendris, A (ed.), Kubota, K (ed.), Lathika, N (ed.), Norris, RD (ed.), Pereira dos Santos, T (ed.), Robinson, R (ed.), Rolison, JM (ed.), Simon, MH (ed.), Tangunan, D (ed.), van der Lubbe, JHJL (ed.), Yamane, M (ed.) & Hucai, Z (ed.) 2016, International Ocean Discovery Program; Expedition 361 preliminary report; South African climates (Agulhas LGM density profile); 30 January-31 March 2016. International Ocean Discovery Program, College Station, USA, College Station, TX, United States.

International Ocean Discovery Program; Expedition 361 preliminary report; South African climates (Agulhas LGM density profile); 30 January-31 March 2016. / Hall, Ian R.; Hemming, Sidney R. (Editor); LeVay, Leah J. (Editor); Barker, Stephen R. (Editor); Berke, Melissa A. (Editor); Brentegani, Luna (Editor); Caley, Thibaut (Editor); Cartagena-Sierra, Alejandra (Editor); Charles, Christopher D. (Editor); Coenen, Jason J. (Editor); Crespin, Julien G. (Editor); Franzese, Allison M. (Editor); Gruetzner, Jens (Editor); Xibin, Han (Editor); Hins, Sophia K. V. (Editor); Jimenez Espejo, Francisco J. (Editor); Just, Janna (Editor); Koutsodendris, Andreas (Editor); Kubota, Kaoru (Editor); Lathika, Nambiyathodi (Editor); Norris, Richard D. (Editor); Pereira dos Santos, Thiago (Editor); Robinson, Rebecca (Editor); Rolison, John M. (Editor); Simon, Margit H. (Editor); Tangunan, Deborah (Editor); van der Lubbe, Jeroen (H,) J. L. (Editor); Yamane, Masako (Editor); Hucai, Zhang (Editor).

College Station, TX, United States : International Ocean Discovery Program, College Station, USA, 2016. 1 p.

Research output: Book / ReportBookAcademic

TY - BOOK

T1 - International Ocean Discovery Program; Expedition 361 preliminary report; South African climates (Agulhas LGM density profile); 30 January-31 March 2016

AU - Hall, Ian R.

A2 - Hemming, Sidney R.

A2 - LeVay, Leah J.

A2 - Barker, Stephen R.

A2 - Berke, Melissa A.

A2 - Brentegani, Luna

A2 - Caley, Thibaut

A2 - Cartagena-Sierra, Alejandra

A2 - Charles, Christopher D.

A2 - Coenen, Jason J.

A2 - Crespin, Julien G.

A2 - Franzese, Allison M.

A2 - Gruetzner, Jens

A2 - Xibin, Han

A2 - Hins, Sophia K. V.

A2 - Jimenez Espejo, Francisco J.

A2 - Just, Janna

A2 - Koutsodendris, Andreas

A2 - Kubota, Kaoru

A2 - Lathika, Nambiyathodi

A2 - Norris, Richard D.

A2 - Pereira dos Santos, Thiago

A2 - Robinson, Rebecca

A2 - Rolison, John M.

A2 - Simon, Margit H.

A2 - Tangunan, Deborah

A2 - van der Lubbe, Jeroen (H,) J. L.

A2 - Yamane, Masako

A2 - Hucai, Zhang

N1 - Affiliation (analytic): Cardiff University, Department of Earth Sciences, Cardiff Corporate Affiliation (monographic): International Ocean Discovery Program, Expedition 361 Scientists, College Station, TX Coordinates: S311300 S311300 E0313243 E0313243; S412537 S412537 E0251538 E0251538; S154915 S154915 E0414607 E0414607; S192117 S192117 E0365454 E0365454; S254916 S254916 E0344610 E0344610; S350332 S350332 E0172404 E0172404 Contains 177 references Research Program: IODP Integrated Ocean Drilling Program; IODP2 International Ocean Discovery Program Document Type: Monograph Bibliographic Level: Monograph Source Note: Preliminary Report - International Ocean Discovery Program, Vol.361, 46p. Publisher: International Ocean Discovery Program, College Station, TX, United States. ISSN: 2372-9562 Copyright Information: GeoRef, Copyright 2017 American Geosciences Institute. GeoRef ID: 2016051681 DOI: 10.14379/iodp.pr.361.2016

PY - 2016

Y1 - 2016

N2 - International Ocean Discovery Program (IODP) Expedition 361 drilled six sites on the southeast African margin and in the Indian-Atlantic ocean gateway, southwest Indian Ocean, from 30 January to 31 March 2016. In total, 5175 m of core was recovered, with an average recovery of 102%, during 29.7 days of on-site operations. The sites, situated in the Mozambique Channel at locations directly influenced by discharge from the Zambezi and Limpopo River catchments, the Natal Valley, the Agulhas Plateau, and Cape Basin, were targeted to reconstruct the history of the greater Agulhas Current system over the past ∼5 my. The Agulhas Current is the strongest western boundary current in the Southern Hemisphere, transporting some 70 Sv of warm, saline surface water from the tropical Indian Ocean along the East African margin to the tip of Africa. Exchanges of heat and moisture with the atmosphere influence southern African climates, including individual weather systems such as extratropical cyclone formation in the region and rainfall patterns. Recent ocean model and paleoceanographic data further point at a potential role of the Agulhas Current in controlling the strength and mode of the Atlantic Meridional Overturning Circulation (AMOC) during the Late Pleistocene. Spillage of saline Agulhas water into the South Atlantic stimulates buoyancy anomalies that act as control mechanisms on the basin-wide AMOC, with implications for convective activity in the North Atlantic and global climate change. The main objectives of the expedition were to establish the sensitivity of the Agulhas Current to climatic changes during the Pliocene-Pleistocene, to determine the dynamics of the Indian-Atlantic gateway circulation during this time, to examine the connection of the Agulhas leakage and AMOC, and to address the influence of the Agulhas Current on African terrestrial climates and coincidences with human evolution. Additionally, the expedition set out to fulfill the needs of the Ancillary Project Letter, consisting of high-resolution interstitial water samples that will constrain the temperature and salinity profiles of the ocean during the Last Glacial Maximum. The expedition made major strides toward fulfilling each of these objectives. The recovered sequences allowed generation of complete spliced stratigraphic sections that span from 0 to between ∼0.13 and 7 Ma. This sediment will provide decadal- to millennial-scale climatic records that will allow answering the paleoceanographic and paleoclimatic questions set out in the drilling proposal.

AB - International Ocean Discovery Program (IODP) Expedition 361 drilled six sites on the southeast African margin and in the Indian-Atlantic ocean gateway, southwest Indian Ocean, from 30 January to 31 March 2016. In total, 5175 m of core was recovered, with an average recovery of 102%, during 29.7 days of on-site operations. The sites, situated in the Mozambique Channel at locations directly influenced by discharge from the Zambezi and Limpopo River catchments, the Natal Valley, the Agulhas Plateau, and Cape Basin, were targeted to reconstruct the history of the greater Agulhas Current system over the past ∼5 my. The Agulhas Current is the strongest western boundary current in the Southern Hemisphere, transporting some 70 Sv of warm, saline surface water from the tropical Indian Ocean along the East African margin to the tip of Africa. Exchanges of heat and moisture with the atmosphere influence southern African climates, including individual weather systems such as extratropical cyclone formation in the region and rainfall patterns. Recent ocean model and paleoceanographic data further point at a potential role of the Agulhas Current in controlling the strength and mode of the Atlantic Meridional Overturning Circulation (AMOC) during the Late Pleistocene. Spillage of saline Agulhas water into the South Atlantic stimulates buoyancy anomalies that act as control mechanisms on the basin-wide AMOC, with implications for convective activity in the North Atlantic and global climate change. The main objectives of the expedition were to establish the sensitivity of the Agulhas Current to climatic changes during the Pliocene-Pleistocene, to determine the dynamics of the Indian-Atlantic gateway circulation during this time, to examine the connection of the Agulhas leakage and AMOC, and to address the influence of the Agulhas Current on African terrestrial climates and coincidences with human evolution. Additionally, the expedition set out to fulfill the needs of the Ancillary Project Letter, consisting of high-resolution interstitial water samples that will constrain the temperature and salinity profiles of the ocean during the Last Glacial Maximum. The expedition made major strides toward fulfilling each of these objectives. The recovered sequences allowed generation of complete spliced stratigraphic sections that span from 0 to between ∼0.13 and 7 Ma. This sediment will provide decadal- to millennial-scale climatic records that will allow answering the paleoceanographic and paleoclimatic questions set out in the drilling proposal.

KW - Africa; Agulhas Current; Algae; Atlantic Meridional Overturning Circulation; Atlantic Ocean; Biostratigraphy; Cenozoic; Chemostratigraphy; Climate effects; Continental margin; Cores; Currents; Expedition 361; Foraminifera; IODP Site U1474; IODP Site U1475

KW - 12 Stratigraphy, Historical Geology and Paleoecology

M3 - Book

SN - 2372-9562

BT - International Ocean Discovery Program; Expedition 361 preliminary report; South African climates (Agulhas LGM density profile); 30 January-31 March 2016

PB - International Ocean Discovery Program, College Station, USA

CY - College Station, TX, United States

ER -

Hall IR, Hemming SR, (ed.), LeVay LJ, (ed.), Barker SR, (ed.), Berke MA, (ed.), Brentegani L, (ed.) et al. International Ocean Discovery Program; Expedition 361 preliminary report; South African climates (Agulhas LGM density profile); 30 January-31 March 2016. College Station, TX, United States: International Ocean Discovery Program, College Station, USA, 2016. 1 p.