Late Quaternary Sedimentation and Early Diagenesis in the Equatorial Atlantic Ocean: Patterns, Trends and Processes Deduced from Rock Magnetic and Geochemical Records

2003 ◽  
pp. 461-497 ◽  
Author(s):  
J. A. Funk ◽  
T. von Dobeneck ◽  
T. Wagner ◽  
S. Kasten
Keyword(s):  
Atlantic Ocean ◽  
Late Quaternary ◽  
Early Diagenesis ◽  
Equatorial Atlantic ◽  
Equatorial Atlantic Ocean

Late Quaternary Upwelling Variations in the Eastern Equatorial Atlantic Ocean as Inferred from Dinoflagellate Cysts, Planktonic Foraminifera, and Organic Carbon Content

2000 ◽  
Vol 54 (1) ◽  
pp. 58-67 ◽  
Author(s):  
Christine Höll ◽  
Sylvia Kemle-von Mücke
Keyword(s):  
Organic Carbon ◽  
Atlantic Ocean ◽  
Carbon Content ◽  
Isotope Composition ◽  
Late Quaternary ◽  
Planktonic Foraminifera ◽  
Organic Carbon Content ◽  
Equatorial Atlantic ◽  
Northern Summer ◽  
Equatorial Atlantic Ocean

Analysis of multiple proxies shows that eastern equatorial Atlantic upwelling was subdued during isotope stage 5.5, more intense during stages 4, 5.2, 5.4, and 6, and most intense early in stage 2. These findings are based on proxy measures from a core site about 600 km southwest of Liberia. The proxies include total organic carbon content, the ratio of peridinoid and oceanic organic-walled dinoflagellate cyst species, accumulation rates of calcareous dinoflagellates, estimates of sea surface paleotemperatures, the difference in stable oxygen isotope composition between two species of planktonic foraminifera that live at different water depths, and the abundance of the planktonic foraminifera Neogloboquadrina dutertrei. Most of these parameters consistently vary directly or inversely with one another. Slight discrepancies between the individual parameters show the usefulness of a multiple proxy approach to reconstruct paleoenvironments. Our data confirm that northern summer insolation strongly influences upwelling in the eastern equatorial Atlantic Ocean.

Pesticides in the lower atmosphere of the northern equatorial Atlantic Ocean

1972 ◽  
Vol 6 (4) ◽  
pp. 283-284
Author(s):  
C.P Lloyd-Jones ◽  
D.P Seba ◽  
J.M Prospero
Keyword(s):  
Atlantic Ocean ◽  
Lower Atmosphere ◽  
Equatorial Atlantic ◽  
Equatorial Atlantic Ocean
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