8.2 kiloyear event
E87434
The 8.2 kiloyear event was a sudden, short-lived global cooling episode during the early Holocene, likely triggered by massive meltwater outbursts disrupting North Atlantic ocean circulation.
Aliases (1)
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
Holocene cooling event
→
abrupt climate change event → climatic event → paleoclimatic anomaly → |
| alsoKnownAs |
8.2 ka event
→
8.2 kyr event → 8.2 thousand years ago cooling event → |
| approximateAgeBeforePresent |
8200 years
→
|
| associatedWith |
Laurentide Ice Sheet decay
→
drainage of proglacial lakes Agassiz and Ojibway → |
| cause |
disruption of North Atlantic thermohaline circulation
→
freshwater influx into North Atlantic Ocean → massive meltwater outburst → |
| characteristic |
global or near-global impact
→
short-lived cooling → sudden onset → |
| chronologicalPosition |
approximately 6200 BCE
→
|
| duration |
about 100 to 200 years
→
|
| effect |
changes in atmospheric circulation patterns
→
changes in monsoon systems → cooling in North Atlantic region → hydrological changes in many regions → reduction in Northern Hemisphere temperatures → |
| evidenceFrom |
Greenland ice cores
→
lake sediment records → marine sediment cores → pollen records → speleothem records → |
| follows |
Younger Dryas termination
→
|
| geographicExtent |
Northern Hemisphere
→
global climate system → primarily North Atlantic region → |
| impactOn |
agricultural development in the Near East
→
early Neolithic societies in some regions → |
| linkedTo |
temporary weakening of North Atlantic Deep Water formation
→
|
| partOf |
Holocene climate variability
→
|
| precedes |
4.2 kiloyear event
→
|
| relatedTo |
Atlantic Meridional Overturning Circulation
→
freshwater forcing experiments in climate models → |
| significance |
constraint on climate model sensitivity to freshwater input
→
natural analogue for abrupt climate change → |
| studiedIn |
Holocene climate research
→
Quaternary science → paleoclimatology → |
| temperatureAnomaly |
cooling of about 1 to 3 degrees Celsius in some regions
→
|
| timePeriod |
early Holocene
→
|
Referenced by (2)
| Subject (surface form when different) | Predicate |
|---|---|
|
8.2 kiloyear event
("8.2 kyr event")
→
|
alsoKnownAs |
|
Holocene
→
|
containsEvent |