noaa-lake-13080
Okpilak Lake, Alaska 14,500 Year Multiproxy Sediment Data
Oswald, W.; Gavin, D.G.; Anderson, P.M.; Brubaker, L.B.; Hu, F.S.
Okpilak Lake, Alaska 14,500 Year Multiproxy Sediment Data
2012-06-30
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/13080
Investigator
W.
Oswald
Investigator
D.G.
Gavin
Investigator
P.M.
Anderson
Investigator
L.B.
Brubaker
Investigator
F.S.
Hu
earth science
paleoclimate
paleolimnology
magnetic susceptibility,sediment,null,dimensionless (SI system),null,paleolimnology,null,null,N,null
earth science
paleoclimate
paleolimnology
age,null,null,calendar year before present,null,paleolimnology,null,null,N,null
earth science
paleoclimate
paleolimnology
organic matter,sediment,null,percent,null,paleolimnology,null,loss on ignition,N,null
earth science
paleoclimate
paleolimnology
magnetic susceptibility
earth science
paleoclimate
paleolimnology
population abundance
earth science
paleoclimate
paleolimnology
physical properties
geoscientificInformation
Arctic
Little Ice Age (LIA)
PAGES Arctic 2k
14428 cal yr BP
-47 cal yr BP
Complete
69.4081
69.4081
-144.0489
-144.0489
593
593
Continent
North America
United States Of America
Alaska
Okpilak Lake>LATITUDE 69.4081>LONGITUDE -144.0489
None
Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, title, online resource, and date accessed. The appearance of external links associated with a dataset does not constitute endorsement by the Department of Commerce/National Oceanic and Atmospheric Administration of external Web sites or the information, products or services contained therein. For other than authorized activities, the Department of Commerce/NOAA does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site.
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
Oswald, W.W., D.G. Gavin, P.M. Anderson, L.B. Brubaker,
and F.S. Hu. 2012.
A 14,500-year record of landscape change from Okpilak Lake,
northeastern Brooks Range, northern Alaska.
Journal of Paleolimnology, Vol. 48, No. 1, June 2012,
pp. 101-113. DOI: 10.1007/s10933-012-9605-6
Analyses of lithology, organic-matter content, magnetic
susceptibility, and pollen in a sediment core from Okpilak Lake,
located in the northeastern Brooks Range, provide new insights
into the history of climate, landscape processes, and vegetation
in northern Alaska since 14,500 cal year BP. The late-glacial
interval (>11,600 cal year BP) featured sparse vegetation cover
and the erosion of minerogenic sediment into the lake from nearby
hillslopes, as evidenced by Cyperaceae-dominated pollen assemblages
and high magnetic susceptibility (MS) values. Betula expanded
in the early Holocene (11,600-8,500 cal year BP), reducing mass
wasting on the landscape, as reflected by lower MS. Holocene
sediments contain a series of silt- and clay-dominated layers,
and given their physical characteristics and the topographic
setting of the lake on the braided outwash plain of the Okpilak
River, the inorganic layers are interpreted as rapidly deposited
fluvial sediments, likely associated with intervals of river
aggradation, changes in channel planform, and periodic overbank
flow via a channel that connects the river and lake. The episodes
of fluvial dynamics and aggradation appear to have been related
to regional environmental variability, including a period of
glacial retreat during the early Holocene, as well as glacial
advances in the middle Holocene (5,500-5,200 cal year BP)
and during the Little Ice Age (500-400 cal year BP).
The rapid deposition of multiple inorganic layers during
the early Holocene, including thick layers at 10,900-10,000
and 9,400-9,200 cal year BP, suggests that it was a particularly
dynamic interval of fluvial activity and landscape change.
STUDY NOTES: Multiproxy sediment data from Okpilak Lake, Alaska, for the past 14,500 years.
Paleoenvironmental proxies measured include lithology, organic-matter content,
magnetic susceptibility, and pollen taxa.
Okpilak Lake, Alaska: 69°24'29"N, 144°02'56"W, 593m elevation
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/alaska/okpilak2012.txt
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/alaska/okpilak2012.xls
USA/NOAA
DIF
Version 9.8.4
2018-12-11
2018-12-11