FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2023162572> ?p ?o ?g. }

• W2023162572 endingPage "318" @default.
• W2023162572 startingPage "301" @default.
• W2023162572 abstract "A hypothesis is presented that late Quaternary 100 000-yr glacial cycles are driven by an asymmetric thermohaline–ice-sheet oscillator that emerged in the global climate system 650 000–950 000 yr ago, perhaps when the main source of Northern Hemisphere deep-water production shifted south from the Arctic into the Nordic seas. It is hypothesised that the asymmetry is due to the increasing difficulty after 950 000 years ago of resetting an interglacial mode of the critical Nordic limb of the salinity conveyor once it switches off and an ensuing iceberg flux enters the areas of downwelling. A possible reason for both a southward shift and the resulting asymmetry is uplift of the Greenland–Scotland submarine ridge from activity of the Iceland mantle plume. In this hypothesis an individual 100 000-yr glacial cycle begins when the northernmost limb of the salinity conveyor in the Nordic seas is curtailed, or even switched off, perhaps due to the growing strength of competing Antarctic Bottom Water (AABW) generated by interglacial recession of the West Antarctic Ice Sheet (WAIS) from the West Antarctic Rift System. Such recession produces southern marginal seas where dense shelf water can collect and overflow into the abyss. When northern ice sheets, nucleated by this circulation switch, develop marine components that calve icebergs into the Nordic seas, the salinity conveyor can no longer revert to an interglacial mode from orbital forcing, as it did prior to 950 000 yr ago. In order to reset an interglacial circulation mode of the conveyor, ice sheets must continue to grow for 100 000 years until they capture enough excess volume to produce a gravitational collapse of marine-based components, so massive that all grounded ice is flushed from North Atlantic continental shelves. The outburst of icebergs produced by this collapse cripples the glacial mode of overturning in the northern North Atlantic. Once this collapse ends, however, the Nordic seas become nearly free of icebergs for the first time in 100 000 years because of the depletion of adjacent marine-based components. As a consequence, North Atlantic salinity increases rapidly, switching the conveyor into a vigorous interglacial mode of operation and hence terminating the glacial cycle. By lowering sea-level, the prolonged growth of Northern Hemisphere ice sheets during each 100 000-yr cycle drives Antarctic grounding lines seaward across continental shelves, squeezing off the source of densified shelf waters that feed AABW. Sea-level rise and increased basal melting, however, caused by the subsequent collapse of northern ice sheets and the reintroduction of North Atlantic Deep Water into the Southern Ocean, reverses the process, forcing retreat of Antarctic grounding lines from their advanced last-glacial maximum positions. This retreat opens marginal seas for renewed formation of dense shelf water. By expanding marginal seas and hence the source of dense shelf water, ongoing recession of the WAIS strengthens AABW during the course of an interglaciation, eventually forcing a thermohaline circulation switch in the Nordic seas and initiating yet another 100 000-yr glacial cycle. The 100 000-yr duration of each cycle is set by two factors. Inertia is built into the system by the long time required for ice sheets to grow to the excess volume necessary for a marine collapse that resets the salinity conveyor into an interglacial mode. Eccentricity-driven changes in the amplitude of the precession or tropical half-precession signal give rise to warming events that trigger such a collapse of excess ice about each 100 000 yr." @default.
• W2023162572 created "2016-06-24" @default.
• W2023162572 creator A5064152938 @default.
• W2023162572 date "2000-01-01" @default.
• W2023162572 modified "2023-09-27" @default.
• W2023162572 title "Does an asymmetric thermohaline-ice-sheet oscillator drive 100 000-yr glacial cycles?" @default.
• W2023162572 cites W1496678316 @default.
• W2023162572 cites W1529264670 @default.
• W2023162572 cites W1538491726 @default.
• W2023162572 cites W1555013279 @default.
• W2023162572 cites W1556381284 @default.
• W2023162572 cites W1556773719 @default.
• W2023162572 cites W1580206559 @default.
• W2023162572 cites W1591668092 @default.
• W2023162572 cites W1608751539 @default.
• W2023162572 cites W1646758270 @default.
• W2023162572 cites W1662063040 @default.
• W2023162572 cites W1667328494 @default.
• W2023162572 cites W1678075960 @default.
• W2023162572 cites W1965454912 @default.
• W2023162572 cites W1965617573 @default.
• W2023162572 cites W1968721411 @default.
• W2023162572 cites W1969034213 @default.
• W2023162572 cites W1973227610 @default.
• W2023162572 cites W1973850832 @default.
• W2023162572 cites W1975637812 @default.
• W2023162572 cites W1975715178 @default.
• W2023162572 cites W1976156138 @default.
• W2023162572 cites W1976650585 @default.
• W2023162572 cites W1977706420 @default.
• W2023162572 cites W1978248369 @default.
• W2023162572 cites W1978582597 @default.
• W2023162572 cites W1980401510 @default.
• W2023162572 cites W1981028614 @default.
• W2023162572 cites W1985455002 @default.
• W2023162572 cites W1986901243 @default.
• W2023162572 cites W1987425355 @default.
• W2023162572 cites W1988104688 @default.
• W2023162572 cites W1988139802 @default.
• W2023162572 cites W1989570428 @default.
• W2023162572 cites W1994100601 @default.
• W2023162572 cites W1995923896 @default.
• W2023162572 cites W1997973087 @default.
• W2023162572 cites W2001134294 @default.
• W2023162572 cites W2002918431 @default.
• W2023162572 cites W2004120038 @default.
• W2023162572 cites W2004169859 @default.
• W2023162572 cites W2004359105 @default.
• W2023162572 cites W2004716959 @default.
• W2023162572 cites W2006652966 @default.
• W2023162572 cites W2007257396 @default.
• W2023162572 cites W2008682025 @default.
• W2023162572 cites W2008875043 @default.
• W2023162572 cites W2014565249 @default.
• W2023162572 cites W2018504988 @default.
• W2023162572 cites W2022545034 @default.
• W2023162572 cites W2033994827 @default.
• W2023162572 cites W2036783728 @default.
• W2023162572 cites W2040146963 @default.
• W2023162572 cites W2040261369 @default.
• W2023162572 cites W2041006844 @default.
• W2023162572 cites W2041265046 @default.
• W2023162572 cites W2043868979 @default.
• W2023162572 cites W2047056119 @default.
• W2023162572 cites W2047554914 @default.
• W2023162572 cites W2048414881 @default.
• W2023162572 cites W2051559013 @default.
• W2023162572 cites W2059108736 @default.
• W2023162572 cites W2062418387 @default.
• W2023162572 cites W2062888724 @default.
• W2023162572 cites W2063409788 @default.
• W2023162572 cites W2064444973 @default.
• W2023162572 cites W2066904459 @default.
• W2023162572 cites W2068859429 @default.
• W2023162572 cites W2068914234 @default.
• W2023162572 cites W2069212976 @default.
• W2023162572 cites W2073982634 @default.
• W2023162572 cites W2075173695 @default.
• W2023162572 cites W2076322211 @default.
• W2023162572 cites W2082052119 @default.
• W2023162572 cites W2083519852 @default.
• W2023162572 cites W2083987367 @default.
• W2023162572 cites W2084428435 @default.
• W2023162572 cites W2085592341 @default.
• W2023162572 cites W2086303915 @default.
• W2023162572 cites W2087625531 @default.
• W2023162572 cites W2087797429 @default.
• W2023162572 cites W2087918587 @default.
• W2023162572 cites W2090183139 @default.
• W2023162572 cites W2090767277 @default.
• W2023162572 cites W2091348587 @default.
• W2023162572 cites W2094170500 @default.
• W2023162572 cites W2094394939 @default.
• W2023162572 cites W2096919365 @default.
• W2023162572 cites W2110526008 @default.
• W2023162572 cites W2119689998 @default.
• W2023162572 cites W2128832472 @default.
• W2023162572 cites W2136923855 @default.

• next