Journal
ANAIS DA ACADEMIA BRASILEIRA DE CIENCIAS
Volume 77, Issue 3, Pages 535-548Publisher
ACAD BRASILEIRA DE CIENCIAS
DOI: 10.1590/S0001-37652005000300013
Keywords
sedimentation; alkenones; bulk organic matter; upwelling; Brazil; South Atlantic
Categories
Ask authors/readers for more resources
The analyses of U-37(k') paleotemperatures and sedimentological parameters in box cores from the Cabo Frio upwelling zone, southeastern Brazil, were used to understand the modem sedimentation as well as to evaluate the role played by the upwelling process in the sedimentary patterns. Three box-cores located closer to the upwelling area show a general trend of cooling waters taking place in the last 700 years. Since the present upwelling is dependent on local and remote wind regime, a phase of dominating NE winds favors a mote effective upward transport of the cold thermocline level South Atlantic Central Water towards the coast. The intensification in the upwelling regime for the last ca. 700 years can be associated with the strengthening of the NE winds off the area and a possible increase of the Brazil Current mesoscale activity. Nevertheless, the lack of significant correlation of the paleotemperatures and most of sedimentological parameters indicate that upwelling is not the only sedimentation mechanism in the area. Also, the comparison of sedimentological parameters reveals that eventual temporal changes are superimposed by the geographical variability. Sedimentation rates vary from 0.26 mm.yr(-1) to 0.66 mm.yr(-1).
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available