Dezileau, Laurent; Ulloa, Osvaldo; Hebbeln, Dierk; Lamy, Frank; Reyss, Jean-Louis (2004): Vertical flux reconstruction for sediment cores off Chile. PANGAEA, https://doi.org/10.1594/PANGAEA.839086, Supplement to: Dezileau, L et al. (2004): Iron control of past productivity in the coastal upwelling system off the Atacama Desert, Chile. Paleoceanography, 19(3), PA3012, https://doi.org/10.1029/2004PA001006
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Biogenic opal and organic carbon vertical rain rates in sediment cores reveal a strong cyclicity in the productivity of the upwelling system off presently arid northern Chile during the last 100,000 years. Changes in productivity are found to be in phase with the precessional cycle (~20,000 years) and with inputs of iron from the continent. During austral summer insolation maxima, increased precipitation and river runoff in the region appear to have brought high inputs of iron, mainly from the Andes, to the coastal ocean enhancing primary productivity there. We interpret our results as providing evidence for iron control of past productivity in this upwelling system and for a tight link between productivity and orbital forcing at midlatitudes.
Median Latitude: -27.466662 * Median Longitude: -71.251414 * South-bound Latitude: -27.466667 * West-bound Longitude: -71.251667 * North-bound Latitude: -27.466660 * East-bound Longitude: -71.251330
Date/Time Start: 1995-06-07T00:00:00 * Date/Time End: 2001-03-31T13:14:00
Datasets listed in this publication series
- Dezileau, L; Ulloa, O; Hebbeln, D et al. (2004): (Table 1) Th, TOC and opal content in sediment cores GeoB3375-1 and GeoB7101-1. https://doi.org/10.1594/PANGAEA.839082
- Dezileau, L; Ulloa, O; Hebbeln, D et al. (2004): (Table 2) Vertical fluxes of TOC, opal and iron of sediment core GeoB7101-1. https://doi.org/10.1594/PANGAEA.839085