Harunur Rashid

Shanghai Ocean University

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Co-Authors

David J. W. Piper

Dalhousie University

Brittany Marche

Memorial University of Newfoundland

Yunping Xu

Shanghai Ocean University

Reinhard Hesse

McGill University

M. Vermooten

Stellenbosch University

Min Zeng

Xinyu University

Harue Masuda

Osaka City University

Francky Saint‐Ange

Beicip Franlab (France)

Wenjie Xiao

Central South University

Toshiya Kanamatsu

Japan Agency for Marine-Earth Science and Technology

Cooperative Institutions

Chinese Academy of Sciences

International Ocean Discovery Program

The Ohio State University

Japan Agency for Marine-Earth Science and Technology

The University of Tokyo

Shanghai Ocean University

Centre National de la Recherche Scientifique

Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou)

University of Chinese Academy of Sciences

Lamont-Doherty Earth Observatory

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A high-resolution 25 ka sea-surface temperature record from the NW Atlantic Ocean: foraminiferal Mg/Ca compared to δ 18 O and sediment parameters.

AGU Fall Meeting Abstracts (2003)

Harunur Rashid E. A. Boyle Lloyd D Keigwin

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Supplementary material to "Spatiotemporal transformation of dissolved organic matter along an alpine stream flowpath on the Qinghai-Tibetan Plateau: importance of source and permafrost degradation"

Yinghui Wang Robert G. M. Spencer David C. Podgorski Anne M. Kellerman Harunur Rashid

Degradation

10.5194/bg-2018-182-supplement

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Effects of climate change and methane-rich fluid activity on sedimentary sulfur geochemical records in the northern South China Sea since mid-Pleistocene

Global and Planetary Change (2024)

Junxi Feng Yufei Zhang Niu Li Jianhou Zhou Jinqiang Liang

10.1016/j.gloplacha.2024.104644

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North Atlantic paleoceanography: The last five million years

Eos (2006)

Ruediger Stein Toshiya Kanamatsu Carlos A. Alvarez Zarikian Sean Higgins Jim E. T. Channell

In the North Atlantic, cold, relatively salty water sinks in the icy Labrador and Greenland seas, forming North Atlantic Deep Water (NADW).This circulates through the global ocean, driving ocean overturning and global heat transport and, thus, impacting global climate. As one of the most climatically sensitive regions on Earth, the North Atlantic has experienced abrupt changes to its oceanatmosphere‐cryosphere system, triggered by fluctuations in meltwater delivery to source areas of NADW formation. For about the past 100 thousand years, these abrupt jumps in climate state have manifested as ‘Dansgaard/Oeschger’ (D/O) oscillations (millennial‐scale warm‐cold oscillations) and 'Heinrich' events in ice and marine sediment cores, respectively [e.g., Dansgaard et al. , 1993; Bond and Lotti , 1995]. These Heinrich events are characterized as huge input of ice‐rafted debris (IRD) and meltwater pulses, documenting episodes of sudden instability and collapse of the current Greenland ice sheets and the Laurentide ice sheet, the latter of which covered northern North America several times during the Pleistocene Epoch.

Meltwater

Ice-sheet model

Gulf Stream

10.1029/2006eo130002

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Citations (23)

Evidence for an additional Heinrich event between H5 and H6 in the Labrador Sea

Paleoceanography (2003)

Harunur Rashid Reinhard Hesse David J. W. Piper

An additional Heinrich ice‐rafting event is identified between Heinrich events 5 and 6 in eight cores from the Labrador Sea and the northwest Atlantic Ocean. It is characterized by sediment rich in detrital carbonate (40% CaCO 3 ) with high concentration of floating dropstones, high coarse‐fraction (% > 150 μm) content, and has a sharp contact with the underlying but grades into the overlying hemipelagic sediment. It also shows lighter δ 18 O Npl values, indicating freshening due to iceberg rafting and/or meltwater discharge. This event is correlated with Dansgaard‐Oeschger event 14 and interpreted as an additional Heinrich event, H5a. The thickness of H5a in the Labrador Sea reaches up to 220 cm. This additional Heinrich event has also been reported in cores PS2644 and SO82‐5 from the northern North Atlantic. With the recognition of H5a the temporal spacing between Heinrich events 1 to 6 becomes more uniform (∼7 ka).

Iceberg

Meltwater

Sediment trap

10.1029/2003pa000913

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Citations (103)

Assessing changes in the upper water thermal structure variability in the northern Indian Ocean during the past 24 ka

Goldschmidt Abstracts (2023)

Yang Wang Harunur Rashid

10.7185/gold2023.19687

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Millennial-Scale Surface Water Mass Changes between the North Atlantic Subpolar and Subtropical Gyre Since the Last Glacial Cycle

Harunur Rashid Min Zeng S. Lodestro J. Grüetzner

Last Glacial Maximum

10.2139/ssrn.4956460

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Missing the forests for the trees: classical Pleistocene multiproxy records versus new geochemical tracers

AGUFM (2009)

P.J. Mudie A.E. Aksu Francine M.G. McCarthy Harunur Rashid

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(Table 2) Radiocarbon age determination from the polar planktonic foraminifera Neogloboquadrina pachyderma s for sediment core HU90-013-029

Harunur Rashid Reinhard Hesse David J. W. Piper

Sediment core

Table (database)

10.1594/pangaea.841370

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The Role of Hudson Strait Outlet in Younger Dryas Sedimentation in the Labrador Sea

Geophysical monograph (2011)

Harunur Rashid David J. W. Piper B. P. Flower

Abrupt Climate C Geophysical Mon Copyright 2011 b 10.1029/2010GM In the Younger Dryas (YD) the circum-North Atlantic region returned to near glacial conditions, widely attributed to the release of fresh water from the Laurentide Ice Sheet (LIS). Hudson Strait was a major outlet for fresh water, icebergs, and sediment from the LIS that deposited Heinrich (H) layers throughout the North Atlantic. Heinrich layer 0 (H0), the YD equivalent ice-rafting event, has been reported to be absent in deep water seaward of the mouth of Hudson Strait. We have identified meter-thick H0 carbonate-rich sediments of YD age seaward of Hudson Strait as nepheloid-flow deposits and as turbidites on the northeast Sohm Abyssal Plain. Otherwise, H0 is generally absent in cores from the Labrador Basin. The thick proximal H0 bed indicates an important supply of fresh water through the Hudson Strait outlet of the LIS during the YD. The sparse distal sediment distribution and values in the planktonic foraminiferal δO in the Labrador Sea, less depleted than during H1, were probably the result of the position of the ice margin, duration of freshwater discharge, and dilution of freshwater signature with the ambient seawater during H0. This change is interpreted to result from differences in the retreat of the ice margin at the mouth of Hudson Strait, resulting in different styles of sediment and freshwater transport during the H0 compared to earlier H events.

Sedimentation

10.1029/2010gm001011

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Citations (22)