RT Journal Article
T1 Control orbital de la dinámica de la surgencia de Perú durante los últimos 800 ka evidenciado por las asociaciones de Cocolitofóridos
T1 Orbital control of the Peru upwelling dynamics during the last 800 Ky revealed by Coccolithophore assemblages
A1 Álvarez, M. C.
A1 Flores, José Abel
A1 Sierro, Francisco Javier
A1 Molina Cruz, A.
AB In order to analyze the surface water dynamics in the Peru upwelling system zone during the last 800 Ka,we studied the calcareous nannofossil content. The ODP site 1237 coccolith assemblage revealed twodominant taxa: «small» Gephyrocapsa and Florisphaera profunda. The «small» Gephyrocapsa abundanceincreased between 0,2 and 0,45 Ma allowing us to interpret a shallow nutricline consequent with a Tradewind intensification. Relative increases in the Florisphaera profunda abundance occurred between 0,86-0,45 Ma and 0,20-0 Ma consistent with a deeper nutricline and weaker Trade winds. Spectral analyses inthe Florisphaera profunda percentages show orbital frequences with peaks at 100, 41 and 23 Kys
PB Sociedad Geológica de España
YR 2005
FD 2005
LK http://hdl.handle.net/10272/8704
UL http://hdl.handle.net/10272/8704
LA spa
DS Repositorio Institucional de la Universidad de Huelva
RD 30 may 2026