Is there evidence for a 4.2 ka BP event in the northern North Atlantic region?
-
Published:2019-09-02
Issue:5
Volume:15
Page:1665-1676
-
ISSN:1814-9332
-
Container-title:Climate of the Past
-
language:en
-
Short-container-title:Clim. Past
Author:
Bradley Raymond S.ORCID, Bakke JosteinORCID
Abstract
Abstract. We review paleoceanographic and paleoclimatic records from the northern North Atlantic to assess the nature of climatic conditions at 4.2 ka BP, which has been identified as a time of exceptional climatic anomalies in many parts of the world. The northern North Atlantic region experienced relatively warm conditions from 6 to 8 ka BP, followed by a general decline in temperatures after ∼5 ka BP, which led to the onset of neoglaciation. Over the last 5000 years, a series of multi-decadal- to century-scale fluctuations occurred, superimposed on an overall decline in temperature. Although a few records do show a glacial advance around 4.2 ka BP, because they are not widespread we interpret them as local events – simply one glacial advance of many that occurred in response to the overall climatic deterioration that characterized the late Holocene.
Publisher
Copernicus GmbH
Subject
Paleontology,Stratigraphy,Global and Planetary Change
Reference106 articles.
1. Aagaard-Sørensen, S., Husum, K., Hald, M., Marchitto, T., and Godtliebsen, F.: Sub-sea surface temperatures in the Polar North Atlantic during the Holocene: Planktic foraminiferal Mg∕Ca temperature reconstructions, Holocene, 24, 93–103, 2014. 2. Alley, R. B. and Anandakrishnan, S.: Variations in melt-layer frequency in the GISP2 ice core: implications for Holocene summer temperatures in central Greenland, Ann. Glaciol., 21, 64–70, 1995. 3. Andersen, C., Koc, N., Jennings, A., and Andrews, J. T.: Nonuniform response of the major surface currents in the Nordic Seas to insolation forcing: implications for the Holocene climate variability, Paleoceanogr. Paleocl., 19, PA2003, https://doi.org/10.1029/2002P, 2004. 4. Andersson, C., Pausata, F. S. R., Jansen, E., Risebrobakken, B., and Telford, R. J.: Holocene trends in the foraminifer record from the Norwegian Sea and the North Atlantic Ocean, Clim. Past, 6, 179–193, https://doi.org/10.5194/cp-6-179-2010, 2010. 5. Andresen, C. S., Björck, S., Bennike, O., and Bond, G.: Holocene climate changes in southern Greenland: evidence from lake sediments, J. Quaternary Sci., 19, 783–795, 2004.
Cited by
38 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献
|
|