noaa-lake-14730
A 3000-year varved record of glacier activity and climate change from the proglacial lake Hvítárvatn, Iceland
Larsen, D.J.; Miller, G.H.; Geirsdóttir, A.; Thordarson, T.
A 3000-year varved record of glacier activity and climate change from the proglacial lake Hvítárvatn, Iceland
2013-03-11
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/14730
Investigator
D.J.
Larsen
Investigator
G.H.
Miller
Investigator
A.
Geirsdóttir
Investigator
T.
Thordarson
earth science
paleoclimate
paleolimnology
age,null,null,year Common Era,null,paleolimnology,null,null,N,null
earth science
paleoclimate
paleolimnology
carbon/nitrogen,sediment,null,dimensionless,null,paleolimnology,null,elemental analysis,N,null
earth science
paleoclimate
paleolimnology
varve thickness,null,null,centimeter,null,paleolimnology,null,null,N,null
earth science
paleoclimate
paleolimnology
organic carbon,sediment,null,weight percent,null,paleolimnology,null,elemental analysis,N,null
earth science
paleoclimate
paleolimnology
organic carbon,sediment,null,milligram per square centimeter per year,null,paleolimnology,null,elemental analysis,N,null
earth science
paleoclimate
paleolimnology
physical properties
earth science
paleoclimate
paleolimnology
geochemistry
geoscientificInformation
Arctic
Little Ice Age (LIA)
Medieval Warm Period
temperature
-1026 AD
2002 AD
2976 cal yr BP
-52 cal yr BP
Complete
64.63805
64.64305
-19.85912
-19.83995
422
422
Continent
Europe
Northern Europe
Iceland
Lake Hvítárvatn03-3>LATITUDE 64.63805>LONGITUDE -19.85912
Continent
Europe
Northern Europe
Iceland
Lake Hvítárvatn03-1>LATITUDE 64.64172>LONGITUDE -19.83995
Continent
Europe
Northern Europe
Iceland
Lake Hvítárvatn03-2>LATITUDE 64.64305>LONGITUDE -19.84928
None
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English
DOC/NOAA/NESDIS/NCEI
National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
https://www.ncdc.noaa.gov/data-access/paleoclimatology-data
DATA Center Contact
Bruce
Bauer
bruce.a.bauer@noaa.gov
paleo@noaa.gov
303-497-6280
303-497-6513
325 Broadway, E/NE31
Boulder
CO
80305-3328
USA
online
ASCII
Larsen, D.J., Miller, G.H., Geirsdóttir, Á., Thordarson, T., 2011. A 3000-year varved record of glacier activity and climate change from the proglacial lake Hvítárvatn. Quaternary Science Reviews 30, 2715-2731.
A suite of environmental proxies in annually laminated sediments from Hvítárvatn, a proglacial lake in the central highlands of Iceland, are used to reconstruct regional climate variability and glacial activity for the past 3000 years. Sedimentological analysis is supported by tephrostratigraphy to confirm the continuous, annual nature of the laminae, and a master varve chronology places proxies from multiple lake cores in a secure geochronology. Varve thickness is controlled by the rate of glacial erosion and efficiency of subglacial discharge from the adjacent Langjökull ice cap. The continuous presence of glacially derived clastic varves in the sediment fill confirms that the ice cap has occupied the lake catchment for the duration of the record. Varve thickness, varve thickness variance, ice rafted debris, total organic carbon (mass flux and bulk concentration), and C:N of sedimentary organic matter, reveal a dynamic late Holocene climate with abrupt and large-scale changes in ice-cap size and landscape stability. A first-order trend toward cooler summers and ice-cap expansion is punctuated by notable periods of rapid ice cap growth and/or landscape instability at ca 1000 BC, 600 BC, 550 AD and 1250 AD. The largest perturbation began ca 1250 AD, signaling the onset of the Little Ice Age and the termination of three centuries of relative warmth during Medieval times. Consistent deposition of ice-rafted debris in Hvítárvatn is restricted to the last 250 years, demonstrating that Langjökull only advanced into Hvítárvatn during the coldest centuries of the Little Ice Age, beginning in the mid eighteenth century. This advance represents the glacial maximum for at least the last 3 ka, and likely since regional deglaciation 10 ka. The multi-centennial response of biological proxies to the Hekla 3 tephra deposition illustrates the significant impact of large explosive eruptions on local environments, and catchment sensitivity to perturbations.
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/europe/iceland/hvitarvatn2011-3varvethickness.txt
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/europe/iceland/hvitarvatn2011-1geochem.txt
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/europe/iceland/hvitarvatn2011-1varvethickness.txt
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/europe/iceland/hvitarvatn2011-2geochem.txt
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/europe/iceland/hvitarvatn2011-2varvethickness.txt
USA/NOAA
DIF
Version 9.8.4
2018-12-11
2018-12-11