noaa-ocean-12895
Golfo Elefantes, Chile 5400 Year Glaciomarine Sediment Data
Bertrand, S.; Hughen, K.A.; Lamy, F.; Stuut, J.-B.W.; Torrejón, F.; Lange, C.B.
Golfo Elefantes, Chile 5400 Year Glaciomarine Sediment Data
2012-04-05
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/12895
Investigator
S.
Bertrand
Investigator
K.A.
Hughen
Investigator
F.
Lamy
Investigator
J.-B.W.
Stuut
Investigator
F.
Torrejón
Investigator
C.B.
Lange
earth science
paleoclimate
paleoceanography
zirconium/aluminum,sediment,null,dimensionless,null,paleoceanography,null,inductively-coupled plasma mass spectrometry,N,null
earth science
paleoclimate
paleoceanography
age,null,null,calendar year before present,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleoceanography
clay,sediment,null,percent,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleoceanography
zirconium,sediment,null,count per second,null,paleoceanography,null,x-ray fluorescence spectroscopy,N,null
earth science
paleoclimate
paleoceanography
sand,sediment,null,percent,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleoceanography
grain size mean,sediment,null,micrometer,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleoceanography
depth,null,null,centimeter,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleoceanography
silt,sediment,null,percent,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleoceanography
magnetic susceptibility,sediment,null,dimensionless (SI system),null,paleoceanography,null,magnetic susceptibility measurement,N,x10-6 units
earth science
paleoclimate
paleoceanography
silicon/aluminum,sediment,null,dimensionless,null,paleoceanography,null,inductively-coupled plasma mass spectrometry,N,null
earth science
paleoclimate
paleocean
geochemistry
earth science
paleoclimate
paleocean
magnetic susceptibility
geoscientificInformation
5391 cal yr BP
-57 cal yr BP
Complete
-46.449
-46.449
-73.798
-73.798
-129
-129
Ocean
Pacific Ocean
Eastern Pacific Ocean
JPC14>LATITUDE -46.449>LONGITUDE -73.798
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
Bertrand, S., K.A. Hughen, F. Lamy, J.-B.W. Stuut, F. Torrejón,
and C.B. Lange. 2012.
Precipitation as the main driver of Neoglacial fluctuations
of Gualas glacier, Northern Patagonian Icefield.
Climate of the Past, Vol. 8, pp. 519-534.
www.clim-past.net/8/519/2012/
doi:10.5194/cp-8-519-2012
Glaciers are frequently used as indicators of climate change.
However, the link between past glacier fluctuations and climate
variability is still highly debated. Here, we investigate the
mid- to late-Holocene fluctuations of Gualas Glacier, one of
the northernmost outlet glaciers of the Northern Patagonian
Icefield, using a multi-proxy sedimentological and geochemical
analysis of a 15m long fjord sediment core from Golfo Elefantes,
Chile, and historical documents from early Spanish explorers.
Our results show that the core can be sub-divided into three
main lithological units that were deposited under very different
hydrodynamic conditions. Between 5400 and 4180 cal yr BP and after
750 cal yr BP, sedimentation in Golfo Elefantes was characterized
by the rapid deposition of fine silt, most likely transported by
fluvio-glacial processes. By contrast, the sediment deposited
between 4130 and 850 cal yr BP is composed of poorly sorted sand
that is free of shells. This interval is particularly marked
by high magnetic susceptibility values and Zr concentrations,
and likely reflects a major advance of Gualas glacier towards
Golfo Elefantes during the Neoglaciation. Several thin silt
layers observed in the upper part of the core are interpreted
as secondary fluctuations of Gualas glacier during the Little
Ice Age, in agreement with historical and dendrochronological
data. Our interpretation of the Golfo Elefantes glaciomarine
sediment record in terms of fluctuations of Gualas glacier
is in excellent agreement with the glacier chronology proposed
for the Southern Patagonian Icefield, which is based on
terrestrial (moraine) deposits. By comparing our results
with independent proxy records of precipitation and sea surface
temperature, we suggest that the fluctuations of Gualas glacier
during the last 5400 yr were mainly driven by changes in
precipitation in the North Patagonian Andes.
STUDY NOTES: Sedimentological and geochemical data obtained on sediment core
JPC14, collected in Golfo Elefantes, Chile, during cruise NBP0505.
The data include magnetic susceptibility (Bartington MS2E point sensor),
grain-size of the lithogenic fraction, Zr/Al and Si/Al (ICP-AES
measurements), and Zr XRF core scanner counts (ITRAX core scanner).
These data are used to reconstruct the fluctuations of Gualas Glacier
(Northern Patagonian Icefield) during the last 5400 years.
Core JPC14, Golfo Elefantes, Northern Chilean Patagonia:
46.449°S, 73.798°W, 129m water depth
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/bertrand2012/bertrand2012.xls
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/bertrand2012/bertrand2012.txt
USA/NOAA
DIF
Version 9.8.4
2018-12-11
2018-12-11