Comparison of oxygen isotope records from the GISP2 and GRIP Greenland ice cores

Grootes, P. M.; Stuiver, Minze; White, James W. C.; Johnsen, S. J.; Jouzel, Jean

doi:10.1038/366552a0

Cited by 1,826 publications

(1,139 citation statements)

References 14 publications

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“…In most parts of the world, climate proxies show a prolonged period of warm conditions during the early Holocene, beginning around 10,000 years ago and continuing for at least 4000 years (Grootes et al 1993;Stager et al 1997;Zhou et al 2004). Mean annual temperatures probably peaked at c. 9500 years ago, with values 3 o C above modern values at mid-latitudes in the northern hemisphere (Foley et al 1994;Morgan et al 2002).…”

Section: Early Holocene Climate and Environmentmentioning

confidence: 99%

Altered Ecologies: Fire, climate and human influence on terrestrial landscapes: Terra Australis 32

Haberle¹,

Stevenson²,

Prebble³

2010

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terra australis 32Terra Australis reports the results of archaeological and related research within the south and east of Asia, though mainly Australia, New Guinea and island Melanesia -lands that remained terra australis incognita to generations of prehistorians. Its subject is the settlement of the diverse environments in this isolated quarter of the globe by peoples who have maintained their discrete and traditional ways of life into the recent recorded or remembered past and at times into the observable present.Since the beginning of the series, the basic colour on the spine and cover has distinguished the regional distribution of topics as follows: ochre for Australia, green for New Guinea, red for South-East Asia and blue for the Pacific Islands. From 2001, issues with a gold spine will include conference proceedings, edited papers and monographs which in topic or desired format do not fit easily within the original arrangements. All volumes are numbered within the same series. Copyright of the text remains with the contributors/authors, 2009. This book is copyright in all countries subscribing to the Berne convention. Apart from any fair dealing for the purpose of private study, research, criticism or review, as permitted under the Copyright Act, no part may be reproduced by any process without written permission. Inquiries should be made to the publisher. Among saltbush greyer than seaweed we boardwalk the yeasting waves of the old golden-perch pond. List of volumes in Terra AustralisRabbit dung dots a lake bottom dry since their coming -only once, last century, after seven inches of rain a farmer had to rescue his sheep by boat.The roo bounces down-slope, a brown branch crackling.The professor's eye, noting the local runoff and what the westerlies do, observes seas that rush in and out of a continent's middle, salt lakes spreading and emptying, hills pimpling up and down with cartoon-like speed, or gullying themselves into extinction, rainforests and deserts zipping back and forth like Tom and Jerry. A human mouse plague swiftly swarms, perhaps soon gone.Impermanent planet. Impermanent surface. All under air and water. The lunette is a wave, a dumper of sand, a collapsing tower in the mad rabbit years when its top blew off and old bones winked through, with a vault's worth of fine stone cores.Once so simply mislaid in sand, now so obligingly sluiced out to the un-subincised world that smiles at stone knives. terra australis 32Altered Ecologies: Fire, climate and human influence on terrestrial landscapes v You might as well offer your table knife to a carpenter.Cane grass and the Dreamtime's stone fight the eroding rivulets together. In today's rare downpour each lost core, or blunted scraper crowns some tiny eroding hillock, plops its anchor in the dissolving silts.The bettong whose skin took off the stone tool's edge has vanished -sacrifice to future fertility.Through the softening soil Homo sapiens's skeleton bumps up like a carp's back.Waits for the wind to shave it off in pieces.A D-section and a ti...

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Section: Early Holocene Climate and Environmentmentioning

confidence: 99%

Altered Ecologies: Fire, climate and human influence on terrestrial landscapes: Terra Australis 32

Haberle¹,

Stevenson²,

Prebble³

2010

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“…SSTs begin to rise from glacial to modern values ca. 12 Ka and only reached modern SSTs ca 5 Ka, much later than northern hemisphere warming indicated by Greenland ice sheets (Dansgaard et al, 1993 andGrootes et al, 1993), where the largest deglacial warming occurs at the onset of the Bolling-Allerød at ~14.7 Ka. In their study site at 4°S, several hundred kilometers south of this study site, Weldeab et al (2006) found the largest glacial-to-interglacial transition at the onset of Heinrich 1.…”

Section: Periods Of Anomalous Warmth In the Northern Tropical Atlantimentioning

confidence: 99%

“…Greenland ice cores (e.g., Dansgaard et al, 1993 andGrootes et al, 1993) and North Atlantic sediment cores (e.g., Heinrich, 1988 andLotti, 1995) distinguish the late Quaternary as a period of abrupt, large amplitude oceanic and atmospheric reorganizations, the Dansgaard-Oeschger and Heinrich events. These events seem to have strongly impacted South and Central American paleoclimate.…”

Section: Introductionmentioning

confidence: 99%

The role of North Brazil Current transport in the paleoclimate of the Brazilian Nordeste margin and paleoceanography of the western tropical Atlantic during the late Quaternary

Nace

Baker

Dwyer

et al. 2014

Palaeogeography, Palaeoclimatology, Palaeoecology

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“…Hence it seems unlikely that intensive NW European Ice Sheet disintegration events preceding H4 were responsible for weakening North Atlantic THC leading to a possible vertical shift in the water mass boundary between GNAIW and SSW at the Blake Ridge. (Grootes et al, 1993;Johnsen et al, 1997), the sortable silt record of Hoogakker et al (2007), IRD counts from Site 1060 (Vautravers et al, 2004), the Antarctic Vostok D/H record (Jouzel et al, 1987), and the percentages of the surface dwelling warm and cold species planktonic foraminifera from Site 1060 (Vautravers et al, 2004). The color code for the sortable silt record is the same as in Fig.…”

Section: Northwest European Iceberg Discharge Preceding H4mentioning

confidence: 99%

“…Authigenic FeeMn oxyhydroxide-derived Nd isotope evolution during MIS 3 (45e35 ka BP, this study) and in the transition from the LGM to the Holocene as seen in nearby core KNR140/12JPC (Gutjahr et al, 2008). The Nd isotope record is set in context with the GRIP oxygen isotope record (Grootes et al, 1993;Johnsen et al, 1997) and the sortable silt record from Site 1060 (Hoogakker et al, 2007). The MIS 3 SS data are smoothed following a (1e2e1) and (1e2e3e2e1) weighing scheme in order to better illustrate longer-term grain size trends.…”

Section: Based On High Benthic Foraminiferal D 13 C Values (Epifaunalmentioning

confidence: 99%

Changes in North Atlantic Deep Water strength and bottom water masses during Marine Isotope Stage 3 (45–35kaBP)

Gutjahr

Hoogakker

McCave

2010

Quaternary Science Reviews

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a b s t r a c tThe strength of the North Atlantic Meridional Overturning Circulation during climatically highly variable Marine Isotope Stage (MIS) 3 has attracted much attention in recent years. Here we present highresolution Nd isotope compositions of past seawater derived from authigenic FeeMn oxyhydroxides recovered from drift sediments on the Blake Ridge in the deep western North Atlantic (ODP Leg 172, Site 1060, 3481 m water depth). The data cover the period from 45 to 35 ka BP, tracing circulation changes during major Heinrich iceberg discharge event 4 (H4, w40e39 ka BP). The Nd isotope record suggests that there was no northern-source water (NSW) mass like modern NADW at the deeper part of Blake Ridge at any time between 45 and 35 ka. This is fundamentally different from the hydrographic situation during the Holocene where NADW extends below 4500 m at this location. The 3 Nd of past deep water recorded in the Blake Ridge sediments was least radiogenic during Dansgaard/Oeschger (D/O) Interstadial (IS) 8 (3 Nd ¼ À11.3) and most radiogenic immediately preceding IS 9 (3 Nd ¼ À9.8). More radiogenic compositions were also recorded during H4 (À10.2 3 Nd À9.9). The Nd isotope variability in MIS 3 matches that of a physical bottom current strength reconstruction from the same location. Neither record follows the pattern of Northern Hemisphere D/O climatic cycles. In our record, reduced mixing with northern source waters started in stadial 12 and lasted until after H4 in stadial 9, followed by a rapid increase in NSW contribution thereafter. This major change in the Nd isotope record predates the iceberg discharge event Heinrich 4 by more than 3 ka indicating a shallowing of the water mass boundary between Glacial North Atlantic Intermediate Water and Southern Source Water beneath. This early change in bottom water properties at the deep Blake Ridge suggests that North Atlantic deep water advection may already have decreased several thousand years before the actual iceberg discharge event and associated freshening of the surface waters in the North Atlantic. The change can thus not be attributed to climatic events in the North Atlantic but may be related to changes in flux of deep water from the South.

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Comparison of oxygen isotope records from the GISP2 and GRIP Greenland ice cores

Cited by 1,826 publications

References 14 publications

Altered Ecologies: Fire, climate and human influence on terrestrial landscapes: Terra Australis 32

Altered Ecologies: Fire, climate and human influence on terrestrial landscapes: Terra Australis 32

The role of North Brazil Current transport in the paleoclimate of the Brazilian Nordeste margin and paleoceanography of the western tropical Atlantic during the late Quaternary

Changes in North Atlantic Deep Water strength and bottom water masses during Marine Isotope Stage 3 (45–35kaBP)

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