Large groups of icebergs traverse the North Atlantic.
A reconstruction of how Heinrich events would have likely proceeded, with the Laurentide ice sheet first growing to an unsustainable position, where the base of its periphery becomes too warm, and then rapidly losing ice until it is reduced to sustainable size[1]
A Heinrich event is a natural phenomenon in which large groups of icebergs break off from the Laurentide Ice Sheet and traverse the Hudson Strait into the North Atlantic.[2] First described by marine geologist Hartmut Heinrich,[3] they occurred during five of the last seven glacial periods over the past 640,000 years.[4] Heinrich events are particularly well documented for the last glacial period but notably absent from the penultimate glaciation.[5] The icebergs contained rock mass that had been eroded by the glaciers, and as they melted, this material was dropped to the sea floor as ice rafted debris (abbreviated to "IRD") forming deposits called Heinrich layers.
The icebergs' melting caused vast quantities of fresh water to be added to the North Atlantic. Such inputs of cold and fresh water may well have altered the density-driven, thermohaline circulation patterns of the ocean, and often coincide with indications of global climate fluctuations.
Various mechanisms have been proposed to explain the cause of Heinrich events, most of which imply instability of the massive Laurentide Ice Sheet, a continental ice sheet covering most of northeastern North America during the last glacial period. Other northern hemisphere ice sheets were potentially involved as well, such as the (Fennoscandic and Iceland/Greenland). However, the initial cause of this instability is still debated.
^Schannwell, Clemens; Mikolajewicz, Uwe; Kapsch, Marie-Luise; Ziemen, Florian (5 April 2024). "A mechanism for reconciling the synchronisation of Heinrich events and Dansgaard-Oeschger cycles". Nature Communications. 15. doi:10.1038/s41467-024-47141-7. PMC 10997585.
^Cite error: The named reference Rodríguez-TovarDoradorHodell2019 was invoked but never defined (see the help page).
^Heinrich, H. (1988). "Origin and consequences of cyclic ice rafting in the northeast Atlantic Ocean during the past 130,000 years". Quaternary Research. 29 (2): 142–152. Bibcode:1988QuRes..29..142H. doi:10.1016/0033-5894(88)90057-9. S2CID 129842509.
^Hodell, David A.; Channell, James E. T.; Curtis, Jason H.; Romero, Oscar E.; Röhl, Ursula (2008-12-01). "Onset of "Hudson Strait" Heinrich events in the eastern North Atlantic at the end of the middle Pleistocene transition (~640 ka)?". Paleoceanography and Paleoclimatology. 23 (4): PA4218. Bibcode:2008PalOc..23.4218H. CiteSeerX 10.1.1.475.7471. doi:10.1029/2008PA001591. ISSN 1944-9186.
^Obrochta, S. P.; Crowley, T. J.; Channell, J. E. T.; Hodell, D. A.; Baker, P. A.; Seki, A.; Yokoyama, Y. (2014). "Climate variability and ice-sheet dynamics during the last three glaciations". Earth and Planetary Science Letters. 406: 198–212. Bibcode:2014E&PSL.406..198O. doi:10.1016/j.epsl.2014.09.004.
A Heinrichevent is a natural phenomenon in which large groups of icebergs break off from the Laurentide Ice Sheet and traverse the Hudson Strait into...
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200 years B.P. and represented temperature drops. Ice-sheet dynamics Heinrichevent Bond, G.; et al. (2001). "Persistent Solar Influence on North Atlantic...
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(March 2004). "Heinrichevents: Massive late Pleistocene detritus layers of the North Atlantic and their global climate imprint: HEINRICHEVENTS". Reviews...
Paleolithic transition, Neanderthal disappearance, and the onset of Heinrichevent 4 (HE-4) drew considerable scholarly attention. In climatostratigraphy...
known as ice rafted debris. These so-called Heinrichevents, named after their discoverer Hartmut Heinrich, appear to have a 7,000–10,000-year periodicity...
due to ice loss from Laurentide ice sheet, similar to Heinrichevents. Unlike true Heinrichevents, though, there was an enormous flow of meltwater through...
years ago Preboreal oscillation - Cooling episode within the preboreal Heinrichevent – Large groups of icebergs traverse the North Atlantic. Little Ice Age –...
The humid period began about 14,600–14,500 years ago at the end of Heinrichevent 1, simultaneously to the Bølling–Allerød warming. Rivers and lakes such...
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Christian Johann Heinrich Heine (German: [ˈhaɪnʁɪç ˈhaɪnə] ; born Harry Heine; 13 December 1797 – 17 February 1856) was a German poet, writer and literary...
in the history of the Earth, which have since been named after him, Heinrichevents. Since October 2017 he is freelancer (10°E maritime consulting) for...
Seismic stratigraphy of the Finger Lakes: a continental record of Heinrichevent H-1 and Laurentide ice sheet instability. Geological Society of America...
Heinrich Rudolf Hertz (/hɜːrts/ HURTS; German: [ˈhaɪnʁɪç ˈhɛʁts]; 22 February 1857 – 1 January 1894) was a German physicist who first conclusively proved...
Bernd Heinrich Wilhelm von Kleist (18 October 1777 – 21 November 1811) was a German poet, dramatist, novelist, short story writer and journalist. His best...
Heinrich Harrer (German: [ˈhaɪnʁɪç ˈhaʁɐ]; 6 July 1912 – 7 January 2006) was an Austrian SS sergeant, mountaineer, explorer, writer, sportsman, and geographer...
(2015-01-01). "The influence of meltwater on the Labrador Current in Heinrichevent 1 and the Younger Dryas". Quaternary Science Reviews. 107: 129–137....
Johann Ludwig Heinrich Julius Schliemann (German: [ˈʃliːman]; 6 January 1822 – 26 December 1890) was a German businessman and an influential amateur archaeologist...
15 kya. The sudden subsequent movement of the ITCZ southwards with a Heinrichevent (a sudden cooling followed by a slower warming), linked to changes with...
with the first Heinrichevent, the Younger Dryas may be associated with the Coipasa highstand and the second Central Andean Pluvial Event although the Younger...
southward. A highstand around 23,000 years ago appears to coincide with Heinrichevent 2, an episode in the North Atlantic where ice discharge into the ocean...
margin may in turn accelerate ice calving and may account for the Heinrichevents. As more ice is removed near the ice margin, more intraplate earthquakes...
stage from 75 to 58 kya. Near the end of this cold phase the first Heinrichevent (H6) occurred, releasing a mass of ice into the north Atlantic 66 kya...
strength, but it has been suggested to have decreased in strength during Heinrichevents. The EASM expanded its influence deeper into the interior of Asia as...
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Laurin Heinrich (born 26 September 2001) is a German racing driver who competes in the Deutsche Tourenwagen Masters and GT World Challenge Europe. He was...
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