Paleoproductivity changes during the Holocene in the inner shelf of Cabo Frio, southeastern Brazilian continental margin: Benthic foraminifera and sedimentological proxies

Nagai, Renata Hanae; Sousa, Silvia Helena de Mello e; Burone, Letícia; Mahiques, Michel Michaelovitch de

doi:10.1016/j.quaint.2008.10.014

Cited by 56 publications

(45 citation statements)

References 49 publications

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“…4) (e.g. Nagai et al, 2009). Regional circulation features such as the land-sea breeze and winds associated with the position and intensity of the South Atlantic subtropical high can be related to the coastal areas that were wetter during the MH if compared to the LH.…”

Section: Temperaturementioning

confidence: 99%

A mid-Holocene climate reconstruction for eastern South America

Prado¹,

Wainer²,

Chiessi³

et al. 2013

Clim. Past

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The mid-Holocene (6000 calibrated years before present) is a key period in palaeoclimatology because incoming summer insolation was lower than during the late Holocene in the Southern Hemisphere, whereas the opposite happened in the Northern Hemisphere. However, the effects of the decreased austral summer insolation over South American climate have been poorly discussed by palaeodata syntheses. In addition, only a few of the regional studies have characterised the mid-Holocene climate in South America through a multiproxy approach. Here, we present a multiproxy compilation of mid-Holocene palaeoclimate data for eastern South America. We compiled 120 palaeoclimatological datasets, which were published in 84 different papers. The palaeodata analysed here suggest a water deficit scenario in the majority of eastern South America during the mid-Holocene if compared to the late Holocene, with the exception of northeastern Brazil. Low mid-Holocene austral summer insolation caused a reduced land–sea temperature contrast and hence a weakened South American monsoon system circulation. This scenario is represented by a decrease in precipitation over the South Atlantic Convergence Zone area, saltier conditions along the South American continental margin, and lower lake levels

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Section: Temperaturementioning

confidence: 99%

A mid-Holocene climate reconstruction for eastern South America

Prado¹,

Wainer²,

Chiessi³

et al. 2013

Clim. Past

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“…For example, Mahiques et al (2005) dated box cores collected off Cabo Frio and recorded ages of 100 years between depths of 6e8 cm, and sedimentation rates of 0.26 mm/y. Souto et al (2011) registered 0.23 mm/yr from 10 cm to the top at 117 m. In addition, a high degree of correlation in the sedimentation indices was recorded off Cabo Frio (transect A) and in the sectors in which lithogenic sediments of the Campos Basin are deposited, i.e., transect E (Mahiques et al, 2004(Mahiques et al, , 2005Nagai et al, 2009). This procedure was also adopted by Bubenshchikova et al (2008) for the analysis of the foraminifera at depths of up to 8 cm in the sediments of the waters off Okhotsk in the western Pacific Ocean.…”

Section: Discussionmentioning

confidence: 82%

“…The highest rates of sedimentation are found near Cabo Frio, due to the local influence of coastal upwelling responsible for the increased primary productivity, and further north of the study area (Mahiques et al, 2004(Mahiques et al, , 2005Nagai et al, 2009;Souto et al, 2011).…”

Section: Discussionmentioning

confidence: 95%

“…The data on the calcium carbonate component and other sedimentological variables analyzed in the present study were obtained from the first few centimeters of the sedimentewater interface, although they were considered to be representative of the whole sediment layer down to 10 cm, given the high sedimentation rates observed typically in the region (Mahiques et al, 2004(Mahiques et al, , 2005Nagai et al, 2009). This also assumes that the subsurface samples are representative of long-term historical records.…”

Section: Discussionmentioning

confidence: 99%

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Biofaciological zonation of benthic foraminifera of the continental shelf of Campos Basin, SE Brazil

Vieira

Koutsoukos

Machado

et al. 2015

Quaternary International

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“…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).…”

Section: Introductionmentioning

confidence: 99%