Lin, Hui-Ling et al. (2003): Late Quaternary paleoproductivity histories near the mouth of the Congo River and the Benguela Current upwelling system, Southwest Africa margin
Leg/Site/Hole:
Related Expeditions:
ODP 175
Identifier:
ID:
2005-019640
Type:
georefid
Creator:
Name:
Lin, Hui-Ling
Affiliation:
National Sun Yat-Sen University, Institute of Marine Geology and Chemistry, Kaohsiung, Taiwan
Role:
author
Name:
Meyers, Philip A.
Affiliation:
University of Michigan at Ann Arbor, United States
Role:
author
Name:
Lin, Chein-Yu
Affiliation:
Role:
author
Identification:
Title:
Late Quaternary paleoproductivity histories near the mouth of the Congo River and the Benguela Current upwelling system, Southwest Africa margin
Year:
2003
Source:
Western Pacific Earth Sciences
Publisher:
Geological Society in Taipei, Institute of Earth Sciences, Taipei, Taiwan
Volume:
3
Issue:
2
Pages:
113-150
Abstract:
Concentrations of CaCO (sub 3) , total organic carbon, opal, and organic matter delta (super 13) C values in sediments from ODP Sites 1075 and 1077 off the mouth of the Congo River and Sites 1082 and 1084 under the Benguela Current have been employed to compare the histories of marine productivity over the past 1200 ky in these two different but related upwelling systems. Productivity has generally been higher at Sites 1082 and 1084 than near the Congo River because of upwelling associated with the Benguela Current. A common decrease of opal MAR at all four sites at around 900 ka probably was caused by relaxation in intensity of southeast Trade Wind intensity, which decreased upwelling along the Namib Margin and lowered delivery of moisture to the West African Monsoon. Paleoproductivity has increased in both systems since 250 ka, indicating reinvigoration of Trade Wind intensity.
Language:
English
Genre:
Serial
Rights:
URL:
Coverage: Geographic coordinates: North:-4.4707 West:10.0430 East:
13.0140 South:-25.3049
Keywords: Oceanography; Isotope geochemistry; Africa; Atlantic Ocean; Benguela Current; C-13/C-12; carbon; carbonates; Cenozoic; Central Africa; chemical composition; Congo River; currents; geochemistry; Holocene; hydrology; isotope ratios; isotopes; Leg 175; mineral composition; Namib Desert; Namibia; ocean currents; Ocean Drilling Program; ODP Site 1075; ODP Site 1082; ODP Site 1084; organic compounds; paleoclimatology; paleoenvironment; Quaternary; rainfall; sedimentation; sedimentation rates; sediments; South Atlantic; Southeast Atlantic; Southern Africa; stable isotopes; total organic carbon;
.