Interaction of the South American Monsoon System and the Southern Westerly Wind Belt during the last 14kyr

Thermal evolution of the western South Atlantic and the adjacent continent during Termination 1

“…3). The Marine13 calibration curve produced very similar ages (i.e., difference smaller than 0.2 kyr) when compared to the previously published values (Chiessi et al, 2008;Razik et al, 2013) calibrated with Marine04 (Hughen et al, 2004) and Marine09 (Reimer et al, 2009). Thus, the age model used here is very similar to the age models published by Chiessi et al (2008) between 19.3 and 14.1 cal ka BP, and by Razik et al (2013) between 14.1 and 10.2 cal ka BP.…”

“…Five ages are based on tests of the shallow-dwelling planktonic foraminifera Globigerinoides ruber (pink and white) and Globigerinoides sacculifer, while the remaining four ages are based either on mixed planktonic foraminifera (i.e., two ages) or epibenthic bivalve shells (i.e., two ages). Apart from the age obtained at 315 cm core depth, all ages were previously published by Chiessi et al (2008) and Razik et al (2013). For each sample, we collected around 10 mg of CaCO 3 from the sediment fraction larger than 150 µm.…”

IODP workshop: developing scientific drilling proposals for the Argentina Passive Volcanic Continental Margin (APVCM) – basin evolution, deep biosphere, hydrates, sediment dynamics and ocean evolution

“…4), often combined with multi-beam bathymetric data, which show the common occurrence of layered sediments and prominent sediment drifts on the Argentine and adjacent Uruguayan margins (e.g., Hernández-Molina et al, 2009Violante et al, 2010, Krastel et al, 2011Lastras et al, 2011;Muñoz et al, 2012;Grützner et al, 2011Grützner et al, , 2012Grützner et al, , 2016Preu et al, 2012Preu et al, , 2013Voigt et al, 2013;Uenzelmann-Neben et al, 2016; see also Hinz et al, 1999). There has also been significant progress studying the climatic records in surficial and near-surface sediments recovered in sediment cores from the Argentine margin (e.g., Chiessi et al, 2007;Bozzano et al, 2011;Govin et al, 2012;Bender et al, 2013;Razik et al, 2013;Razik, 2014;García Chapori et al, 2014, demonstrating that this margin also contains important modern sedimentary deposits.…”

Magnetic fingerprint of the late Holocene inception of the Río de la Plata plume onto the southeast Brazilian shelf

“…A second role is played by the strengthening of the low-level cyclonic flow during the austral winter rainfall that is caused by the mid-latitude cyclone over South Atlantic (Vera et al, 2002). The southern westerly wind belt (SWWB) has also played an important role in the climatic conditions over S and SE South America in the past as shown recently by Razik et al (2013). It blows from the Pacific at the tropospheric level and discharges most of its moisture on the Andes, bringing dust from the west into its dry winds Garreaud et al, 2009).…”

“…Cavallotto et al, 2004;Mahiques et al, 2009;Nagai et al, 2009;Chiessi et al, 2010;Gyllencreutz et al, 2010;Bender et al, 2013;Razik et al, 2013). The hydrological dynamics off the mouth of the Rio de la Plata (RdlP) is dominated by the plume of its discharge waters, which is transported northward by the Brazilian Coastal Current (BCC) to the SE Brazilian continental shelf (Souza and Robinson, 2004;Piola et al, 2005).…”