Response of marine palynomorphs to Neogene climate cooling in the Iceland Sea (ODP Hole 907A)

Schreck, Michael; Méheust, Marie; Stein, Rüdiger; Matthießen, Jens

doi:10.1016/j.marmicro.2013.03.003

Cited by 42 publications

(46 citation statements)

References 144 publications

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“…Dinocyst distribution in marine surface sediments has shown to reflect changes in the sea surface water properties, mostly responding to temperature (e.g., Rochon et al, 1999;Zonneveld et al, 2013). Down-core changes in dinocyst assemblages are widely used in reconstructing past environmental changes in the Quaternary (e.g., de Vernal et al, 2009), but also in the Neogene and Paleogene (e.g., Versteegh and Zonneveld, 1994;Head et al, 2004;Pross and Brinkhuis, 2005;Sluijs et al, 2005;Schreck et al, 2013;De Schepper et al, 2011, 2013Hennissen et al, 2017).…”

Section: Palynological Proxiesmentioning

confidence: 99%

Land–sea coupling of early Pleistocene glacial cycles in the southern North Sea exhibit dominant Northern Hemisphere forcing

et al. 2018

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Abstract. We assess the disputed phase relations between forcing and climatic response in the early Pleistocene with a spliced Gelasian ( ∼ 2.6-1.8 Ma) multi-proxy record from the southern North Sea basin. The cored sections couple climate evolution on both land and sea during the intensification of Northern Hemisphere glaciation (NHG) in NW Europe, providing the first well-constrained stratigraphic sequence of the classic terrestrial Praetiglian stage. Terrestrial signals were derived from the Eridanos paleoriver, a major fluvial system that contributed a large amount of freshwater to the northeast Atlantic. Due to its latitudinal position, the Eridanos catchment was likely affected by early Pleistocene NHG, leading to intermittent shutdown and reactivation of river flow and sediment transport. Here we apply organic geochemistry, palynology, carbonate isotope geochemistry, and seismostratigraphy to document both vegetation changes in the Eridanos catchment and regional surface water conditions and relate them to early Pleistocene glacial-interglacial cycles and relative sea level changes. Paleomagnetic and palynological data provide a solid integrated timeframe that ties the obliquity cycles, expressed in the borehole geophysical logs, to Marine Isotope Stages (MIS) 103 to 92, independently confirmed by a local benthic oxygen isotope record. Marine and terrestrial palynological and organic geochemical records provide high-resolution reconstructions of relative terrestrial and sea surface temperature (TT and SST), vegetation, relative sea level, and coastal influence.During the prominent cold stages MIS 98 and 96, as well as 94, the record indicates increased non-arboreal vegetation, low SST and TT, and low relative sea level. During the warm stages MIS 99, 97, and 95 we infer increased stratification of the water column together with a higher percentage of arboreal vegetation, high SST, and relative sea level maxima. The early Pleistocene distinct warm-cold alterations are synchronous between land and sea, but lead the relative sea level change by 3000-8000 years. The record provides evPublished by Copernicus Publications on behalf of the European Geosciences Union. 398T. H. Donders et al.: Land-sea coupling of early Pleistocene glacial cycles idence for a dominantly Northern Hemisphere-driven cooling that leads the glacial buildup and varies on the obliquity timescale. Southward migration of Arctic surface water masses during glacials, indicated by cool-water dinoflagellate cyst assemblages, is furthermore relevant for the discussion on the relation between the intensity of the Atlantic meridional overturning circulation and ice sheet growth.

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Section: Palynological Proxiesmentioning

confidence: 99%

Land–sea coupling of early Pleistocene glacial cycles in the southern North Sea exhibit dominant Northern Hemisphere forcing

et al. 2018

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“…Al ter na tively, it also may be re ferred to sea wa ter tem per a ture. The prasinophycean Cymatiosphaera is com monly treated as an in di ca tor of cold-and/or re duced sa linity wa ters (Schreck et al, 2013 and ref er ences therein). Quaijtaal et al (2015) sug gested cold-wa ter pref er ences of the Miocene spe cies Cymatiosphaera?…”

Section: Discussionmentioning

confidence: 99%

“…from the top of the Anadoly sec tion may re flect warmer-wa ter con di tions (see Schreck et al, 2013: p. 55) in com par i son to wa ter tem per a ture just af ter de po si tion of the Ratyn Lime stone (i.e., the low er most part of the Anadoly sec tion). Nannobarbophora gedlii (ex Svenkodinium versteeghii, see Head, 2003), pre sum ably a warm-wa ter spe cies (see Gedl, 1996;Schreck et al, 2013), is ab sent at Anadoly, but it was noted from the up per parts of the Kudryntsi and Shchyrets sec tions (Gedl and Peryt, 2011;Peryt et al, 2014); its oc cur rence can be cor re lated with the Micrhystridium? sp.…”

Section: Discussionmentioning

confidence: 99%

Foraminiferal and palynological organic matter records of the Upper Badenian (Middle Miocene) deposits at Anadoly (marginal part of the Ukrainian Carpathian Foredeep Basin)

Gedl

Peryt

2016

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This study in di cates the oc cur rence of over 54 spe cies of ben thic foraminifers and 10 spe cies of planktonics. Ben thic foraminifera are rep re sented mainly by cal car e ous forms; ag glu ti nated tests are very rare. Plank tonic foraminifera ap pear in the up per part of the suc ces sion stud ied. Five ben thic foraminiferal assem blages are rec og nized: A (Elphi dium/Lobatula/Astrononion) B (Hauerinidae), C (Cibicidoides/Lobatula), D (Porosononion) and E (Uvigerina/Bulimina). The foraminiferal re cord in di cates de po si tion in a shal low subtidal en vi ron ment (20 m depth) of nor mal ma rine sa lin ity and tem per ate wa ters fol lowed by grad ual deep en ing of the ba sin to >50 m. Anal y sis of foraminiferal as sem blages in di cates that bot tom wa ters were highly ox y gen ated dur ing de po si tion of the lower and mid dle parts of the Anadoly se quence. Dur ing de po si tion of the up per part of the se quence the ox y gen a tion of bot tom wa ter grad ually de creased, as ex pressed by a large de crease in the pro por tion of oxic spe cies and an in crease in dysoxic ones. The same set of sam ples yielded low amounts of palynological or ganic mat ter rep re sented by dom i nant black opaque phytoclasts; bisaccate pol len grains and dinoflagellate cysts are rare. Tax o nom i cally im pov er ished as sem blages of the lat ter con sist of dom i nant Polysphaeridium and Cleistosphaeridium placacanthum as so ci ated with Lingulodinium machaerophorum and a few other taxa. The tax o nom i cally rich est as sem blage was found in the top most sam ple. These changes were in ter preted as in dic a tive for in creased sa lin ity in the sur face wa ter layer, with its max i mum in the mid dle part of the sec tion; the as sem blage from the top most part is char ac ter is tic for nor mal ma rine sa lin ity.

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“…Proxy data temperature estimates for SATs are based on palaeobotanical data (Salzmann et al, 137 2008(Salzmann et al, 137 , 2013 and for SSTs from planktonic foraminiferal assemblages, and Mg/Ca and alkenone 138 paleothermometry (Dowsett et al, 2010Schreck et al, 2013;Knies et al, 2014).…”

mentioning

confidence: 99%

“…In addition to the sites used in Howell et al (2014), mid-Pliocene Arctic SST estimates from 146 Schreck et al (2013) and Knies et al (2014), are included. The SST estimate for ODP 911 from…”

mentioning

confidence: 99%

Sensitivity of Pliocene Arctic climate to orbital forcing, atmospheric CO2 and sea ice albedo parameterisation

Howell

Haywood

Dowsett

et al. 2016

Earth and Planetary Science Letters

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Arctic conditions. Given the strong influence that sea ice exerts on high latitude temperatures, an 8 enhanced understanding of the nature of mPWP Arctic sea ice would be highly beneficial. 9Using the HadCM3 GCM, this paper explores the impact of various combinations of potential 10 mPWP orbital forcing, atmospheric CO 2 concentrations and minimum sea ice albedo on sea ice 11 extent and high latitude warming. The focus is on the Northern Hemisphere, due to availability 12 of proxy data, and the large data-model discrepancies in this region. Changes in orbital forcings 13 are demonstrated to be sufficient to alter the Arctic sea ice simulated by HadCM3 from perennial 14 to seasonal. However, this occurs only when atmospheric CO 2 concentrations exceed 300 ppm. 15Reduction of the minimum sea ice albedo from 0.5 to 0.2 is also sufficient to simulate seasonal sea

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Response of marine palynomorphs to Neogene climate cooling in the Iceland Sea (ODP Hole 907A)

Cited by 42 publications

References 144 publications

Land–sea coupling of early Pleistocene glacial cycles in the southern North Sea exhibit dominant Northern Hemisphere forcing

Land–sea coupling of early Pleistocene glacial cycles in the southern North Sea exhibit dominant Northern Hemisphere forcing

Foraminiferal and palynological organic matter records of the Upper Badenian (Middle Miocene) deposits at Anadoly (marginal part of the Ukrainian Carpathian Foredeep Basin)

Sensitivity of Pliocene Arctic climate to orbital forcing, atmospheric CO2 and sea ice albedo parameterisation

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