Provenance of lithogenic surface sediments and pathways of riverine suspended matter in the Eastern Mediterranean Sea: evidence from 143Nd/144Nd and 87Sr/86Sr ratios

Weldeab, Syee; Emeis, Kay–Christian; Hemleben, Christoph; Siebel, Wolfgang

doi:10.1016/s0009-2541(01)00415-6

Cited by 138 publications

(143 citation statements)

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“…The determination of terrigenous particle provenance, of both eolian or riverine input, in Mediterranean marine sediments has, in general, been based on geochemical and mineralogical data (e.g., Coudé-Gaussen et al, 1987;Foucault and Mélières, 2000;Wehausen and Brumsack, 2000;Caquineau et al, 2002;Weldeab et al, 2002aWeldeab et al, , 2002bWeldeab et al, , 2003Díaz-Hernández et al, 2011;Formentti et al, 2011) as well as on remote sensing methods, analysis of surface dust observations, back-trajectory analysis, and the use of mineral tracers (e.g., Goudie and Middleton, 2001;Laurent et al, 2008). Radiogenic isotopes (Sr, Nd, Pb) are likewise powerful tracers for identifying and characterizing source areas of terrigenous material, which may in turn give us additional information about the provenance and transport mechanisms (e.g., Grousset et al, , 1992Grousset et al, , 1998Revel et al, 1996;Tütken et al, 2002;Grousset and Biscaye, 2005;Jullien et al, 2007;Cole et al, 2009;Box et al, 2011;Meyer et al, 2011;Stumpf et al, 2011;Scheuvens et al, 2013).…”

Section: Accepted M Manuscriptmentioning

confidence: 99%

“…Pleistocene and Holocene sediments, obtaining as main radiogenic end members Saharan dust and Nile particulate matter (e.g., Krom et al, 1999aKrom et al, , 1999bWeldeab et al, 2002aWeldeab et al, , 2002bWeldeab et al, , 2003Revel et al, 2010;Box et al, 2011;Blanchet et al, 2013). In the westernmost Mediterranean area, however, less work has focused on the identification of terrigenous provenance and transport patterns.…”

Section: Accepted M Manuscriptmentioning

confidence: 99%

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Radiogenic isotopes for deciphering terrigenous input provenance in the western Mediterranean

et al. 2015

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Section: Accepted M Manuscriptmentioning

confidence: 99%

Section: Accepted M Manuscriptmentioning

confidence: 99%

Radiogenic isotopes for deciphering terrigenous input provenance in the western Mediterranean

et al. 2015

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“…Les métaux lourds et les polluants organiques persistants sont en effet principalement transportés adsorbés sur les matières en suspension [HOROWITZ, 1995]. La contribution des fleuves de la côte nord méditerranéenne est plus que jamais importante à connaître et à quantifier depuis la construction du barrage d'Assouan sur le Nil, qui a réduit les apports du principal pourvoyeur de matières solides à la mer [WELDEAB et al, 2002].…”

Section: Introductionunclassified

Apport de matières en suspension à la Méditerranée : le rôle des crues dans le bilan des exportations du bassin-versant de l’Hérault

Petelet‐Giraud

Négrel

2007

TSM

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“…The chronology of this 592 cm long core, which spans the past 92 28,000 years before present (hereafter 28 ka BP), is based on 15 AMS 14 C dates on 93 foraminifera and was previously published along with alkenone and TEX86 sea surface 94 temperature (SST) estimates [Castañeda et al, 2010]. The surface currents flow in an 95 anticlockwise direction around the basin and sediment from the Nile River is transported 96 eastward to the coring site [Weldeab et al, 2002]. (Fig.…”

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confidence: 99%

“…In contrast, the White Nile is sourced at equatorial Lake Victoria 199 and the Precambrian crystalline basement rocks in its catchment are characterized by a 200 higher 87 Sr/ 86 Sr values (approximately 0.7105) and low ɛNd values [Krom et al, 2002; Box 201 et al, 2011;Blanchet et al, 2013; Blanchet et al, 2014]. Saharan dust is characterized by 202 high 87 Sr/ 86 Sr values of >0.7173 [Krom et al, 2002;Weldeab et al, 2002] (Fig. 3).…”

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confidence: 99%

Hydroclimate variability in the Nile River Basin during the past 28,000 years

Castañeda

Schouten

Pätzold

et al. 2016

Earth and Planetary Science Letters

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13It has long been known that extreme changes in North African hydroclimate occurred 14 during the late Pleistocene yet many discrepancies exist between sites regarding the timing, 15 duration and abruptness of events such as Heinrich Stadial (HS) 1 and the African Humid 16Period (AHP). The hydroclimate history of the Nile River is of particular interest due to its 17 lengthy human occupation history yet there are presently few continuous archives from the 18 Nile River corridor, and pre-Holocene studies are rare. Here we present new organic and 19 inorganic geochemical records of Nile Basin hydroclimate from an eastern Mediterranean 20 (EM) Sea sediment core spanning the past 28 ka BP. Our multi-proxy records reflect the 21 fluctuating inputs of Blue Nile versus White Nile material to the EM Sea in response to 22 2 gradual changes in local insolation and also capture abrupt hydroclimate events driven by 23 remote climate forcings, such as HS1. We find strong evidence for extreme aridity within 24 the Nile Basin evolving in two distinct phases during HS1, from 17.5 to 16 ka BP and from 25 16-14.5 ka BP, whereas peak wet conditions during the AHP are observed from 9-7 ka BP. 26We find that zonal movements of the Congo Air Boundary (CAB), and associated shifts in 27 the dominant moisture source (Atlantic versus Indian Ocean moisture) to the Nile Basin, 28 likely contributed to abrupt hydroclimate variability in northern East Africa during HS1 29 and the AHP as well as to non-linear behavior of hydroclimate proxies. We note that 30 different proxies show variable gradual and abrupt responses to individual hydroclimate 31 events, and thus might have different inherent sensitivities, which may be a factor partially 32 contributing to the controversy surrounding the abruptness of past events such as the AHP. Introduction 40The paleoclimate history of the Nile River valley in East Africa is of interest due to its 41 rich history of human occupation (Vermeersch and Van Neer, 2015). Relationships 42 between climate and the distribution of settlements on the Nile River corridor have long 43 been recognized and it is hypothesized that extreme changes in African hydroclimate 44 helped shape the growth and led to the decline of numerous complex societies [Kuper and 45 3 Kröpelin, 2006]. One of the most dramatic changes in North African hydroclimate, the so-46 called African Humid Period (AHP) [deMenocal et al., 2000], occurred during the early 47Holocene when increased rainfall allowed vegetation, lakes and human populations to 48 occupy a "green Sahara", a region that today is a hyperarid desert [Kuper and Kröpelin, 49 2006]. Variability in Nile River flow also played an important role in shaping Egypt's 50 civilizations with the collapse of the Old Kingdom at 4,160 years before present, attributed 51 to a 30 year absence of annual Nile flooding [Stanley et al., 2003]. Although lacking direct 52 evidence, it is hypothesized that HS1, which is recognized as an extreme and widespread 53 drought in North Afri...

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Provenance of lithogenic surface sediments and pathways of riverine suspended matter in the Eastern Mediterranean Sea: evidence from 143Nd/144Nd and 87Sr/86Sr ratios

Cited by 138 publications

References 24 publications

Radiogenic isotopes for deciphering terrigenous input provenance in the western Mediterranean

Radiogenic isotopes for deciphering terrigenous input provenance in the western Mediterranean

Apport de matières en suspension à la Méditerranée : le rôle des crues dans le bilan des exportations du bassin-versant de l’Hérault

Hydroclimate variability in the Nile River Basin during the past 28,000 years

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