Controls on terrigenous sediment supply to the Arabian Sea during the late Quaternary: the Indus Fan

Prins, Maarten A.; Postma, George; Cleveringa, J.; Cramp, A.; Kenyon, Neil H.

doi:10.1016/s0025-3227(00)00086-4

Cited by 127 publications

(95 citation statements)

References 23 publications

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“…Titanium is known to be concentrated in the coarser sediment fraction, particularly in the heavy mineral assemblage which often contains ilmenite, rutile, titanomagnetite, and augite [Schmitz, 1987]. At site NIOP478, these Ti/Al maxima must therefore reflect maximum dust input [Prins et al, 2000]. A satellite image taken during the winter monsoon clearly shows a large dust plume over the northern Arabian Sea leaving the Pakistan coast (Figure 1).…”

Section: Discussionmentioning

confidence: 99%

Hyperstratification following glacial overturning events in the northern Arabian Sea

et al. 2004

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[1] Correlations between Arabian Sea organic carbon and GISP2 d 18 O records indicate a pronounced oxygen minimum zone (OMZ) during interstadials, whereas well-oxygenated conditions prevailed during stadials. Local deep winter mixing ventilated intermediate water during the coldest stadials, corresponding to North Atlantic Heinrich events. Here we show that in the Arabian Sea periods of climatic warming following Heinrich events H6-H4 and the Younger Dryas (YD) are characterized by dominant Polysphaeridium zoharyi (dinoflagellate) cysts. The finding of assemblages dominated by P. zoharyi in the open ocean is unusual because today similar assemblages are restricted to lagoonal settings. It is postulated that the highly saline mixed layer and the strong density gradient which characterized Arabian Sea hydrography after H6-H4 and the YD simulated a shallow seafloor, thereby enabling germination of cysts prior to sinking. The strong density gradient following cold stadials should have facilitated the rapid reestablishment of a pronounced OMZ during interstadials.

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Section: Discussionmentioning

confidence: 99%

Hyperstratification following glacial overturning events in the northern Arabian Sea

et al. 2004

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“…The Indus Fan is the second largest deep-sea fan in the world, reflecting the high discharge of sediments from the Himalayas, which are drained by the Indus River (Kolla and Coumes, 1987;Prins et al, 2000a). A study by Prins et al (2000a, closed square on Figure 2) has shown that during glacial low-stands during the Quaternary period, material from the Indus River was deposited on the middle fan.…”

Section: Sedimentation In the Arabian Seamentioning

confidence: 99%

“…A study by Prins et al (2000a, closed square on Figure 2) has shown that during glacial low-stands during the Quaternary period, material from the Indus River was deposited on the middle fan. Between 8,000 and 10,000 years ago, however, when sea level had risen to near present-day levels, eolian dusts from the Arabian Peninsula began to dominate terrigenous sedimentation on the middle fan (Prins et al, 2000a). Indus sediments are presently deposited on the inner shelf and in the Ranns of Kutch, a subaerially exposed region within the southeast corner of the Indus Delta (Wells and Coleman, 1984;von Rad and Tahir, 1997).…”

Section: Sedimentation In the Arabian Seamentioning

confidence: 99%

“…Because these three sites are clearly affected by fluvial sedimentation, they are unlikely to be useful locations for eolian reconstructions. Given the current state of knowledge regarding present-day sedimentation in the Arabian Sea, however, plant waxes at the remaining sites are likely delivered by winds (Wells and Coleman, 1984;Sirocko and Sarnthein, 1989;von Rad and Tahir, 1997;Prins et al, 2000a).…”

Section: Accumulation Ratesmentioning

confidence: 99%

“…One potential complication in the interpretation of temporal changes in plant wax accumulation rate is the uncertainty of the magnitude of fluvial inputs through time. In the Arabian Sea, lowered sea level during the Last Glacial Maximum allowed for the sedimentation of Indus-derived material as far from the continent as the middle fan, where lithogenic sedimentation today is eolian (Prins et al, 2000a).…”

Section: Controls On the Deposition Of Plant Waxes In The Arabian Seamentioning

confidence: 99%

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Terrigenous plant wax inputs to the Arabian Sea: Implications for the reconstruction of winds associated with the Indian Monsoon

Dahl

Oppo

Eglinton

et al. 2005

Geochimica et Cosmochimica Acta

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We have determined the accumulation rates and carbon isotopic compositions (δ 13 C) of longchain (C 24 -C 32 ) terrigenous plant wax fatty acids in 19 surface sediment samples geographically distributed throughout the Arabian Sea in order to assess the relationship between plant wax inputs and the surrounding monsoon wind systems. Both the accumulation rate data and the δ 13 C data show that there are three primary eolian sources of plant waxes to the Arabian Sea: Africa, Asia, and the Arabian Peninsula. These sources correspond to the three major wind systems in this region: the summer (Southwest) monsoon, the winter (Northeast)

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Weakening and strengthening of the Indian monsoon during Heinrich events and Dansgaard-Oeschger oscillations

et al. 2014

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The Dansgaard-Oeschger oscillations and Heinrich events described in North Atlantic sediments and Greenland ice are expressed in the climate of the tropics, for example, as documented in Arabian Sea sediments. Given the strength of this teleconnection, we seek to reconstruct its range of environmental impacts. We present geochemical and sedimentological data from core SO130-289KL from the Indus submarine slope spanning the last~80 kyr. Elemental and grain size analyses consistently indicate that interstadials are characterized by an increased contribution of fluvial suspension from the Indus River. In contrast, stadials are characterized by an increased contribution of aeolian dust from the Arabian Peninsula. Decadal-scale shifts at climate transitions, such as onsets of interstadials, were coeval with changes in productivity-related proxies. Heinrich events stand out as especially dry and dusty events, indicating a dramatically weakened Indian summer monsoon, potentially increased winter monsoon circulation, and increased aridity on the Arabian Peninsula. This finding is consistent with other paleoclimate evidence for continental aridity in the northern tropics during these events. Our results strengthen the evidence that circum-North Atlantic temperature variations translate to hydrological shifts in the tropics, with major impacts on regional environmental conditions such as rainfall, river discharge, aeolian dust transport, and ocean margin anoxia.

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Controls on terrigenous sediment supply to the Arabian Sea during the late Quaternary: the Indus Fan

Cited by 127 publications

References 23 publications

Hyperstratification following glacial overturning events in the northern Arabian Sea

Hyperstratification following glacial overturning events in the northern Arabian Sea

Terrigenous plant wax inputs to the Arabian Sea: Implications for the reconstruction of winds associated with the Indian Monsoon

Weakening and strengthening of the Indian monsoon during Heinrich events and Dansgaard-Oeschger oscillations

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