Rapid Communication
Multiproxy evidence of an early Holocene (8.2 kyr) climate oscillation in central Nova Scotia, Canada
Professor Ian Spooner,
Marianne S. V. Douglas,
Lisa Terrusi,
Corresponding Author
Professor Ian Spooner
Department of Geology, Acadia University, Wolfville, NS B0P 1X0, Canada
Department of Geology, Acadia University, Wolfville, NS B0P 1X0, Canada.Search for more papers by this authorMarianne S. V. Douglas
Department of Geology, University of Toronto, 22 Russell St. Toronto, ON M5S 3B1, Canada
Search for more papers by this authorLisa Terrusi
Department of Geology, University of Toronto, 22 Russell St. Toronto, ON M5S 3B1, Canada
Search for more papers by this authorProfessor Ian Spooner,
Marianne S. V. Douglas,
Lisa Terrusi,
Corresponding Author
Professor Ian Spooner
Department of Geology, Acadia University, Wolfville, NS B0P 1X0, Canada
Department of Geology, Acadia University, Wolfville, NS B0P 1X0, Canada.Search for more papers by this authorMarianne S. V. Douglas
Department of Geology, University of Toronto, 22 Russell St. Toronto, ON M5S 3B1, Canada
Search for more papers by this authorLisa Terrusi
Department of Geology, University of Toronto, 22 Russell St. Toronto, ON M5S 3B1, Canada
Search for more papers by this authorAbstract
An early Holocene lake sediment record from central Nova Scotia contains a minerogenic oscillation that is closely correlative with the 8.2 kyr event (ca. 8200 cal. yr BP), an event that has not been reported elsewhere in Atlantic Canada. A variety of biological and sedimentological indicators have been examined to characterise autochthonous and allochthonous changes that occurred during this time. The minerogenic upper oscillation (UO, ca. 8400 cal. yr BP) is marked by an increase in the chrysophyte:diatom ratio. Following the oscillation, the diatom community reflects a shift to more productive, less acidic conditions. The pollen record shows no major response to this short-lived event. Lithostratigraphic analyses indicates that the UO is characterised by an increase in clastic content, magnetic susceptibility and mean sediment grain size, all indicators of changing environmental conditions, most likely the result of regional cooling. The Taylor Lake record adds to a growing body of evidence for a widespread, hemispheric climate oscillation at 8.2 kyr. Copyright © 2002 John Wiley & Sons, Ltd.
REFERENCES
- Alley RB, Mayewski PA, Sowers T, Stuiver M, Taylor KC, Clark PU. 1997. Holocene climate instability: a prominent, widespread event 8200 yr ago. Geology 25: 483–486.
- Anderson TW, Lewis CFM. 1992. Climate influences on deglacial drainage changes in southern Canada at 10 to 8 ka suggested by pollen evidence. Geographie physique et Quaternaire 46: 255–272.
- Anderson TW, Macpherson JB. 1994. Wisconsinan Late-glacial environmental change in Newfoundland: a regional review. Journal of Quaternary Science 9: 171–178.
- Andrews JT, MacLean B, Kerwin M, Manley W, Jennings AE, Hall F. 1995. Final stages in the collapse of the Laurentide Ice Sheet, Hudson Strait, NWT, Canada: 14C dates, seismic stratigraphy, and magnetic susceptibility logs. Quaternary Science Reviews 14: 983–1004.
- Barber DC, Dyke A, Hillaire-Marcel C, Jennings AE, Andrews JT, Kerwin MW, Bilodeau G, McNeely R, Southon J, Morehead MD, Gagnon J-M. 1999. Forcing of the cold event of 8200 years ago by catastrophic drainage of Laurentide lakes. Nature 400: 344–348.
- Bassett IJ, Cromption CW, Parmelee JA. 1978. An Atlas of Airborne Pollen Grains and Common Fungus Spores of Canada. Monograph No. 18, Research Branch, Canada Department of Agriculture: Ottawa; 321 pp.
- Bond G, Showers W, Cheseby M, Lotti R, Almasi P, deMenocal P, Priore P, Cullen H, Hajdas I, Bonani G. 1997. A pervasive millennial-scale cycle in North Atlantic Holocene and glacial climates. Science 278: 1257–1266.
- Camburn KE, Charles DF. 2000. Diatoms of Low-Alkalinity Lakes in the Northeastern United States. Academy of Natural Sciences Publications: Philadelphia; 152 pp.
- Cwynar LC, Levesque AJ. 1995. Chironomid evidence for late-glacial climatic reversals in Maine. Quaternary Research 43: 405–413.
- Dean WE Jr. 1974. Determination of carbonate and organic matter in calcareous sediments and sedimentary rocks by loss on ignition: comparison with other methods. Journal of Sedimentary Petrology 44: 242–248.
- Donner L. 1995. Late-Pleistocene environments in Maine: the Younger Dryas dilemma. MSc thesis, University of Maine: Orono, Maine.
- Douglas MSV, Smol JP. 1987. Siliceous protozoan plates in lake sediments. Hydrobiologia 154: 13–23.
- Douglas MSV, Smol JP. 1995. Periphytic diatom assemblages from high Arctic ponds. Journal of Phycology 31: 60–69.
- Faegri K, Iverson J. 1975. Textbook of Pollen Analysis. Blackwell: Oxford.
- Francus P. 1998. An image-analysis technique to measure grain-size variation in thin sections of soft clastic sediments. Sedimentary Geology 121: 289–298.
- Gasse F, Van Campo E. 1994. Abrupt post-glacial events in West Asia and North Africa. Earth and Planetary Science Letters 126: 435–456.
- Grant DR. 1994. Quaternary Geology, Cape Breton Island, Nova Scotia. Geological Survey of Canada Bulletin 482: 159 pp.
- Hughen KA, Overpeck JT, Pewterson LC, Trumbore S. 1996. Rapid climate changes in the tropical Atlantic Region during the last deglaciation. Nature 366: 552–554.
- Jetté H, Mott RJ. 1995. Vegetation and climate of maritime Canada at 6000 years BP: a synthesis. Géographie physique et Quaternaire 49: 141–162.
- King LH. 1993. Proposed Younger Dryas glaciation of the eastern Scotian Shelf. Canadian Journal of Earth Science 31: 401–417.
- King LH. 1996. Late Wisconsinan ice retreat from the Scotian Shelf. Geological Society of America Bulletin 108: 1056–1067.
- Klitgaard-Kristensen D, Sejrup HP, Haflidason H, Johnsem S, Spurk M. 1998. A regional 8200 cal. yr BP cooling event in northwest Europe, induced by final stages of Laurentide ice-sheet deglaciation? Journal of Quaternary Science 13: 165–169.
- Kramer K, Lange-Bertalot H. 1986, 1988, 1991. Bacillariophyceae 1–3. In Die Susswasserflora von Mitteleuropa, H Ettl, J Gerloff, H Heynig, D Mollenhauer (eds). Fischer: Stuttgart.
- Kurek J, Cwynar L, Spear RW, Schulz M. 2002. A high resolution Holocene climate record from the White Mountains of Eastern North America. Geological Society of America Abstracts with Programs 34: 49.
- Levesque AJ, Mayle FE, Walker IR, Cwynar LC. 1993. The Amphi-Atlantic Oscillaton: a Late-Glacial climtic event. Quaternary Science Reviews 12: 629–643.
- Lim DSS C Kwan, Douglas MSV. 2001. Periphytic diatom assemblages from Bathurst Island, Nunavut, Canadian High Arctic—an examination of community relationships and habitat preferences. Journal of Phycology 37: 1–13.
- MacDonald IML, Spooner IS. 2001. Late-Glacial and Holocene stratigraphy of Piper Lake, Pictou County, Nova Scotia: evidence for Younger Dryas perennial ice cover and sustained landscape instability during the Early Holocene. Atlantic Geology 37: 116–117.
- Mayle FE, Cwynar LC. 1995. Multi-proxy data for the Younger Dryas in Atlantic Canada. Quaternary Science Reviews 14: 813–821.
- McAndrews JH, Berti AA, Noris G. 1973. Key to the Quaternary Pollen and Spores of the Great Lakes Region. Royal Ontario Museum Life Sciences Miscellaneous Publication, The University of Toronto Press: Toronto, Ontario; 64 pp.
- McDermott F, Mattey DP, Oex UK, Hawkesworth CJ. 2001. The impact of the ‘8200 year’ cooling event on the eastern Atlantic margin; evidence from an oxygen isotope speleothem record from S.W. Ireland. Geological Association of Canada–Mineralogical Association of Canada Joint Annual Meeting, St John's, Newfoundland, Abstracts; Vol. 26: 99.
- Miller RF. 1996. Late-glacial (Allerod–Younger Dryas) Coleoptera from central Cape Breton Island, Nova Scotia, Canada. Canadian Journal of Earth Science 34: 247–259.
- Moore PD, Webb JA, Collinson ME. 1991. Pollen Analysis, 2nd edn. Blackwell Scientific Publications: Cambridge, MA; 216 pp.
- Mott RJ. 1985. Late-glacial climate change in the maritime provinces. In Climate change in Canada 5: Critical Periods in the Quaternary Climatic History of North America, Harington CR (ed.). Syllogeus 55: 281–300.
- Mott RJ. 1994. Wisconsinan Late-glacial environmental change in Nova Scotia: a regional synthesis. Journal of Quaternary Science 9: 155–160.
- Mott RJ, Stea RR. 1993. Late Glacial (Allerod/Younger Dryas) buried organic deposits, Nova Scotia, Canada. Quaternary Science Reviews 12: 645–657.
- Patrick R, Reimer C. 1966, 1975. The Diatoms of the United States, Parts I and II. Monograph 13, Academy of Natural Sciences of Philadelphia: Philadelphia, PA; 1–688.
- Railton JB. 1973. Vegetational and climate history of western Nova Scotia in relation to a South Mountain ice cap. PhD thesis, Dalhousie University: Halifax, Nova Scotia; 146 pp.
- Rawlence DJ. 1988. The post-glacial diatom history of Splan Lake, New Brunswick. Journal of Paleolimnology 1: 51–60.
10.1007/BF00202193 Google Scholar
- Rawlence DJ, Senior A. 1988. A late-glacial diatom and pigment history of Little Lake, New Brunswick with particular reference to the Younger Dryas climatic oscillation. Journal of Paleolimnology 1: 163–177.
10.1007/BF00177763 Google Scholar
- Reasoner MA. 1993. Equipment and procedure improvements for a lightweight, inexpensive percussion core sampling system. Journal of Paleoclimatology 8: 273–281.
10.1007/BF00177859 Google Scholar
- Ricciardi A, Reiswig HM. 1993. Freshwater sponges (Porifera, Spongillidae) of eastern Canada: taxonomy, distribution and ecology. Canadian Journal of Zoology 71: 665–682.
- Ritchie JC. 1987. Postglacial Vegetation of Canada. Cambridge University Press: Cambridge; 178 pp.
- Siver PA, Kling H. 1997. Morphological observations of Aulacoseira using scanning electron microscopy. Canadian Journal of Botany 75: 1807–1835.
- Smol JP. 1983. Paleophycology of a high arctic lake near Cape Herschel, Ellesmere Island. Canadian Journal of Botany 61: 2195–2204.
- Smol JP. 1985. The ratio of diatom frustules to chrysophycean statospores: a useful paleolimnological index. Hydrobiologia 123: 199–208.
- Smol JP. 1988. Chrysophycean microfossils in paleolimnological studies. Palaeogeography, Palaeoclimate, Palaeoecology 62: 287–297.
- Spooner IS. 1998. Changes in lake-sediment stratigraphy associated with late glacial climate change: examples from western Nova Scotia. Atlantic Geology 34: 229–240.
- Spooner IS, MacDonald IML, Douglas MSV. 2001. Paleolimnological records of Late Glacial and Early Holocene environmental change from eastern Nova Scotia. Geological Association of Canada–Mineralogical Association of Canada Joint Annual Meeting, St John's, Newfoundland, Abstracts; Vol. 26: 143.
- Stea RR, Mott RJ. 1989. Deglaciation environments and evidence for glaciers of Younger Dryas age in Nova Scotia, Canada. Boreas 18: 169–187.
- Stea RR, Mott RJ. 1998. Deglaciation of Nova Scotia: stratigraphy and chronology of lake sediment cores and buried peat sections. Geographie physique et Quaternaire 52: 3–21.
- Stuiver M, Reimer PJ. 1998. University of Washington Quaternary Isotope Laboratory Radiocarbon Calibration Program Rev 4.1 Beta 3. Radiocarbon 35: 215–230.
10.1017/S0033822200013904 Google Scholar
- Tinner W, Lotter AF. 2001. Central European vegetation response to abrupt climate change at 8.2 ka. Geology 29(6): 551–554.
- Traverse A. 1988. Paleopalynology. Unwin Hyman: Boston, MA; 600 pp.
- Von Grafenstein U, Erlenkeuser H, Muller J, Jouzel J, Johnsen S. 1998. The cold event 8200 years ago documented in oxygen isotope records of precipitation in Europe and Greenland. Climate Dynamics 14: 73–81.
- Yu Z, Eicher U. 1998. Abrupt climate oscillations during the last deglaciation in central North America. Science 282: 2235–2238.
