A shift in heavy and clay mineral provenance indicates a middle Miocene onset of a perennial sea ice cover in the Arctic Ocean

Krylov, Alexey; Andreeva, I. A.; Vogt, Christoph; Backman, Jan; Krupskaya, V. V.; Grikurov, G. E.; Moran, Kathryn; Hirano, Shoji

doi:10.1029/2007pa001497

Cited by 107 publications

(90 citation statements)

References 46 publications

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“…Assuming that source areas for sediments analyzed in the ACEX record were geographically too far away to be rafted by seasonal sea ice, it is suggested that a perennial sea ice cover was established 14e13 Ma (Darby, 2008;Krylov et al, 2008). However, because of the relatively poor resolution of the ACEX core, no studies have yet resolved whether or not there have been periods when perennial sea ice cover disintegrated.…”

Section: Arctic Ocean Sea Icementioning

confidence: 99%

New insights on Arctic Quaternary climate variability from palaeo-records and numerical modelling

Jakobsson

Long

Inǵólfsson

et al. 2010

Quaternary Science Reviews

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a b s t r a c tTerrestrial and marine geological archives in the Arctic contain information on environmental change through Quaternary interglacialeglacial cycles. The Arctic Palaeoclimate and its Extremes (APEX) scientific network aims to better understand the magnitude and frequency of past Arctic climate variability, with focus on the "extreme" versus the "normal" conditions of the climate system. One important motivation for studying the amplitude of past natural environmental changes in the Arctic is to better understand the role of this region in a global perspective and provide base-line conditions against which to explore potential future changes in Arctic climate under scenarios of global warming. In this review we identify several areas that are distinct to the present programme and highlight some recent advances presented in this special issue concerning Arctic palaeo-records and natural variability, including spatial and temporal variability of the Greenland Ice Sheet, Arctic Ocean sediment stratigraphy, past ice shelves and marginal marine ice sheets, and the Cenozoic history of Arctic Ocean sea ice in general and Holocene oscillations in sea ice concentrations in particular. The combined sea ice data suggest that the seasonal Arctic sea ice cover was strongly reduced during most of the early Holocene and there appear to have been periods of ice free summers in the central Arctic Ocean. This has important consequences for our understanding of the recent trend of declining sea ice, and calls for further research on causal links between Arctic climate and sea ice.

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Section: Arctic Ocean Sea Icementioning

confidence: 99%

New insights on Arctic Quaternary climate variability from palaeo-records and numerical modelling

Jakobsson

Long

Inǵólfsson

et al. 2010

Quaternary Science Reviews

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“…However, this does not fit with other data from ACEX. For example, reconstructions of ice-drift paths and provenance indicate that a perennial ice-cover was first established in the Arctic Ocean before 12 Ma (Krylov et al, 2008;Darby, 2008;Haley et al, 2008aHaley et al, , 2008b. While some of this evidence is based upon assumptions of ice-drift speeds that may not be correct, it should also be noted that a perennial ice coverage is also inferred from the generally smooth but coarse resolution exponential decrease of 10 Be/ 9 Be with depth in the Neogene/Quaternary ACEX sediments .…”

Section: Plio-pleistocene Ird Recordsmentioning

confidence: 99%

Plio-Pleistocene trends in ice rafted debris on the Lomonosov Ridge

O’Regan

John

Moran

et al. 2010

Quaternary International

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a b s t r a c tAlthough more than 700 sediment cores exist from the Arctic Ocean, the Plio-Pleistocene evolution of the basin and its marginal seas remains virtually unknown. This is largely due the shallow penetration of most of these records, and difficulties associated with deriving chronologies for the recovered material. The Integrated Ocean Drilling Program's (IODP) Expedition 302 (Arctic Coring Expedition, ACEX) recovered 197 m of Neogene/Quaternary sediment from the circumpolar regions of the Lomonosov Ridge. As detailed analyses of this material emerge, research is beginning to formulate a long-term picture of paleoceanographic changes in the central Arctic Ocean. This paper reviews the ACEX PlioPleistocene age model, identifies uncertainties, and addresses ways in which these may be eliminated. Within the established stratigraphic framework, a notable reduction in the abundance of ice rafted debris (IRD) occurs in the early part of the Pleistocene and persists until Marine Isotope Stage 6 (MIS 6). Therefore, while global oceanographic proxies indicate the gradual growth of terrestrial ice-sheets during this time, IRD delivery to the central Arctic Ocean remained comparatively low and stable. Within the resolution of existing data, the Pleistocene reduction in IRD is synchronous with predicted changes in both the inflow of North Atlantic and Pacific waters, which in modern times are known to exert a strong influence on sea ice stability.

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“…In the Neogene, the onset of a perennial sea-ice pack in the Arctic Ocean has been suggested, using different analytical approaches, to have occurred sometime between 15 Ma and 13 Ma [100,[102][103][104]. This spans the time of major growth of the East Antarctic ice sheet [105] and may point to a paleoclimatic teleconnection between the two poles during the middle Miocene [105,106].…”

Section: Early Arctic Ice and Northern Hemisphere Glaciation -mentioning

confidence: 99%

Expanding the Cenozoic paleoceanographic record in the Central Arctic Ocean: IODP Expedition 302 Synthesis

Backman

Moran

2009

Open Geosciences

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Abstract:The Arctic Coring Expedition (ACEX) proved to be one of the most transformational missions in almost 40 year of scientific ocean drilling. ACEX recovered the first Cenozoic sedimentary sequence from the Arctic Ocean and extended earlier piston core records from ∼1.5 Ma back to ∼56 Ma. The results have had a major impact in paleoceanography even though the recovered sediments represents only 29% of Cenozoic time. The missing time intervals were primarily the result of two unexpected hiatuses. This important Cenozoic paleoceanographic record was reconstructed from a total of 339 m sediments. The wide range of analyses conducted on the recovered material, along with studies that integrated regional tectonics and geophysical data, produced surprising results including high Arctic Ocean surface water temperatures and a hydrologically active climate during the Paleocene Eocene Thermal Maximum (PETM), the occurrence of a fresher water Arctic in the Eocene, ice-rafted debris as old as middle Eocene, a middle Eocene environment rife with organic carbon, and ventilation of the Arctic Ocean to the North Atlantic through the Fram Strait near the early-middle Miocene boundary. Taken together, these results have transformed our view of the Cenozoic Arctic Ocean and its role in the Earth climate system.

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A shift in heavy and clay mineral provenance indicates a middle Miocene onset of a perennial sea ice cover in the Arctic Ocean

Cited by 107 publications

References 46 publications

New insights on Arctic Quaternary climate variability from palaeo-records and numerical modelling

New insights on Arctic Quaternary climate variability from palaeo-records and numerical modelling

Plio-Pleistocene trends in ice rafted debris on the Lomonosov Ridge

Expanding the Cenozoic paleoceanographic record in the Central Arctic Ocean: IODP Expedition 302 Synthesis

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