Forcing of the cold event of 8,200 years ago by catastrophic drainage of Laurentide lakes

  title={Forcing of the cold event of 8,200 years ago by catastrophic drainage of Laurentide lakes},
  author={Donald C Barber and Arthur S. Dyke and Claude Hillaire‐Marcel and Anne E. Jennings and John T. Andrews and Michael W. Kerwin and G. Bilodeau and Roger McNeely and John Southon and Mark D. Morehead and Jonathan Gagnon},
The sensitivity of oceanic thermohaline circulation to freshwater perturbations is a critical issue for understanding abrupt climate change. Abrupt climate fluctuations that occurred during both Holocene and Late Pleistocene times have been linked to changes in ocean circulation, but their causes remain uncertain. One of the largest such events in the Holocene occurred between 8,400 and 8,000 calendar years ago,, (7,650–7,200 14C years ago), when the temperature dropped by 4–8 °C in central… 
Importance of freshwater injections into the Arctic Ocean in triggering the Younger Dryas cooling
  • J. Teller
  • Environmental Science, Geography
    Proceedings of the National Academy of Sciences
  • 2012
A number of climate fluctuations have been linked to changes in the flux of freshwater to the oceans that, if large enough, might have impacted on ocean circulation and, in turn, have resulted in a change in climate.
Freshwater input and abrupt deglacial climate change in the North Atlantic
Greenland ice-core records indicate that the last deglaciation (~7 - 21 ka) was punctuated by numerous abrupt climate reversals, involving temperature changes of up to 5-10oC within decades.
A subtropical fate awaited freshwater discharged from glacial Lake Agassiz
The 8.2 kyr event is the largest abrupt climatic change recorded in the last 10,000 years, and is widely hypothesized to have been triggered by the release of thousands of kilometers cubed of
Freshwater Outburst from Lake Superior as a Trigger for the Cold Event 9300 Years Ago
Reconstructing lake-level changes in the Superior basin suggests that a rapid fall of lake level of about 45 meters occurred 9300 years ago, possibly due to the sudden failure of a drift dam, and ascribes the widespread climate anomaly ~9300 years ago to this freshwater outburst delivered to the North Atlantic Ocean through the Lake Huron–North Bay–Ottawa River–St.
Abrupt changes in North American climate during early Holocene times
Recent studies of the Greenland ice cores have offered many insights into Holocene climatic dynamics at decadal to century timescales. Despite the abundance of continental records of Holocene
The influence and chronological uncertainties of the 8.2 ka cooling event on continental climate records in China
A compilation of early-Holocene terrestrial records from lacustrine sediments, ice cores, peat bog, palaeosols, stalagmites and flood sediments from China indicates that the early-Holocene climate
Freshwater Discharge, Sediment Transport, and Modeled Climate Impacts of the Final Drainage of Glacial Lake Agassiz
A cold event at around 8200 calendar years BP and the release, at around that time, of a huge freshwater outburst from ice-dammed glacial Lake Agassiz have lent support to the idea that the flood
Abrupt climate changes of Holocene
This paper is a review of studies of abrupt climate changes (ACCs) during the Holocene published during the past ten years. North Atlantic cold events are indicators of ACCs. As indicated by North
Routing of western Canadian Plains runoff during the 8.2 ka cold event
The collapse of the Laurentide Ice Sheet over Hudson Bay ∼8.47 ka allowed the rapid drainage of glacial Lake Agassiz into the Labrador Sea, an event identified as causing a reduction in Atlantic


Rapid climate changes in the tropical Atlantic region during the last deglaciation
THE climate system is capable of changing abruptly from one stable mode to another1–3. Rapid climate oscillations—in particular the Younger Dryas cold period during the last deglaciation—have long
The cold event 8200 years ago documented in oxygen isotope records of precipitation in Europe and Greenland
Abstract Stable oxygen isotope ratios of ostracod valves in Late Glacial and Holocene sediments of core AS 92-5 from deep lake Ammersee (southern Germany) reflect variations of mean oxygen isotope
A Pervasive Millennial-Scale Cycle in North Atlantic Holocene and Glacial Climates
Evidence from North Atlantic deep sea cores reveals that abrupt shifts punctuated what is conventionally thought to have been a relatively stable Holocene climate. During each of these episodes,
A regional 8200 cal. yr BP cooling event in northwest Europe, induced by final stages of the Laurentide ice-sheet deglaciation?
The most notable change in δ18O in Greenland ice cores during the Holocene occurs at 8200 cal. yr BP. Here we present a new high-resolution marine record from the northern North Sea, along with
Coupled ocean‐atmosphere model response to freshwater input: Comparison to Younger Dryas Event
This study explores the responses of a coupled ocean-atmosphere model to the discharge of freshwater into the North Atlantic Ocean. In the first numerical experiment in which freshwater is discharged
Holocene climatic instability: A prominent, widespread event 8200 yr ago
The most prominent Holocene climatic event in Greenland ice-core proxies, with approximately half the amplitude of the Younger Dryas, occurred ∼8000 to 8400 yr ago. This Holocene event affected
Abrupt climate fluctuations in the tropics: the influence of Atlantic Ocean circulation
Several prolonged droughts in the Sahel and tropical Mexico during the past 14,000 years were coincident with large injections of fresh water into the northern North Atlantic Ocean. The link between
Temporal‐geographical meltwater influences on the North Atlantic conveyor: Implications for the Younger Dryas
The temporal and geographical roles of meltwater discharge (from the Laurentide ice sheet) on North Atlantic Deep Water (NADW) production are investigated utilizing a global, realistic geometry,
The GISP2 δ18O Climate Record of the Past 16,500 Years and the Role of the Sun, Ocean, and Volcanoes
Abstract Measured 18O/16O ratios from the Greenland Ice Sheet Project 2 (GISP2) ice core extending back to 16,500 cal yr B.P. provide a continuous record of climate change since the last glaciation.