noaa-lake-10434
Laguna de Los Anteojos, Venezuela Younger Dryas Sediment Data
Stansell, N.D.; Abbott, M.B.; Rull, V.; Rodbell, D.; Bezada, M.; Montoya, E.
Laguna de Los Anteojos, Venezuela Younger Dryas Sediment Data
2010-04-24
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/10434
Investigator
N.D.
Stansell
Investigator
M.B.
Abbott
Investigator
V.
Rull
Investigator
D.
Rodbell
Investigator
M.
Bezada
Investigator
E.
Montoya
earth science
paleoclimate
paleolimnology
carbon/nitrogen,sediment,null,dimensionless,null,paleolimnology,null,null,N,null
earth science
paleoclimate
paleolimnology
depth,null,null,centimeter,null,paleolimnology,null,null,N,null
earth science
paleoclimate
paleolimnology
biogenic silica,sediment,null,weight percent,null,paleolimnology,smoothed,spectrophotometry,N,smoothed using lowess 0.01
earth science
paleoclimate
paleolimnology
density,sediment,null,gram per cubic centimeter,null,paleolimnology,null,null,N,null
earth science
paleoclimate
paleolimnology
volume magnetic susceptibility,sediment,null,dimensionless (SI system),null,paleolimnology,null,magnetic susceptibility measurement with point or surface sensor,N,x10-6 units
earth science
paleoclimate
paleolimnology
titanium,sediment,null,count per second,null,paleolimnology,null,x-ray fluorescence spectroscopy,N,null
earth science
paleoclimate
paleolimnology
biogenic silica,sediment,null,weight percent,null,paleolimnology,null,spectrophotometry,N,null
earth science
paleoclimate
paleolimnology
age,null,null,calendar year before present,null,paleolimnology,null,null,N,null
earth science
paleoclimate
paleolimnology
titanium,sediment,null,count per second,null,paleolimnology,smoothed,x-ray fluorescence spectroscopy,N,smoothed using lowess 0.01
earth science
paleoclimate
paleolimnology
mineral matter,sediment,null,weight percent,null,paleolimnology,null,null,N,calculated as 100% minus organic matter minus Biogenic silica
earth science
paleoclimate
paleolimnology
organic matter,sediment,null,weight percent,null,paleolimnology,null,loss on ignition,N,550 degrees C
earth science
paleoclimate
paleolimnology
magnetic susceptibility
earth science
paleoclimate
paleolimnology
physical properties
earth science
paleoclimate
paleolimnology
geochemistry
geoscientificInformation
PAGES 2k Network
PAGES LOTRED SA2k
Younger Dryas
abrupt climate change
14737 cal yr BP
9501 cal yr BP
Complete
8.5383
8.5383
-71.0737
-71.0737
3920
3920
Continent
South America
Venezuela
Laguna de Los Anteojos>LATITUDE 8.5383>LONGITUDE -71.0737
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
Stansell, N.D., M.B. Abbott, V. Rull, D.T. Rodbell, M. Bezada,
and E. Montoya. 2010.
Abrupt Younger Dryas cooling in the northern tropics recorded
in lake sediments from the Venezuelan Andes.
Earth and Planetary Science Letters, Vol. 293, pp. 154-163.
doi:10.1016/j.epsl.2010.02.040
A radiocarbon dated sediment record from Laguna de Los Anteojos,
a cirque lake in the Mérida Andes of Venezuela, indicates that
warmer and wetter atmospheric conditions occurred in the northern
tropics at the onset of the Bølling (~14,600 cal yr BP), and
abruptly colder and drier conditions around the time of the
Younger Dryas (YD). Geochemical and clastic sediment analyses
from Los Anteojos show that glaciers advanced at ~12,850 cal yr BP,
reached their YD maximum extent at ~12,650 cal yr BP, and then
retreated until complete deglaciation of the watershed at ~11,750
cal yr BP. The onset of warmer conditions that ended the coldest
phase of the YD occurred several hundred years earlier at Los
Anteojos than in the high latitudes of the Northern Hemisphere.
During the peak YD glacial advance, glacier equilibrium-line
altitudes in the region were ~360 to 480 m lower, and temperature
was ~2.2 to 2.9°C colder than modern. Independent palynological
evidence from the Los Anteojos sediment core indicates that the
northern Andes were more arid and at least 2.3°C colder during
the YD. The direction and timing of glacial fluctuations in
Venezuela are consistent with observations of marine sediment
records from the Cariaco Basin that suggest abrupt cooling
occurred at ~12,850 cal yr BP, followed by a shift to higher
temperature after ~12,300 cal yr BP. The timing and pattern
of climatic changes in northern South America are also consistent
with paleoclimate records from the southern Tropical Andes that
suggest a southward shift in the position of the Intertropical
Convergence Zone occurred at the start of the cooling event,
followed by a return to wetter conditions in northern South
America during the late stages of the YD. The early warming
of the tropical atmosphere and invigoration of the hydrologic
cycle likely contributed to the shift to increased temperature
in the higher latitudes of the Northern Hemisphere at the end
of the late glacial stage.
STUDY NOTES: Multiproxy lake sediment data from Laguna de Los Anteojos
in the Mérida Andes of Venezuela, covering the Younger Dryas
climate event.
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/southamerica/venezuela/los-anteojos2010.xls
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/southamerica/venezuela/los-anteojos2010.txt
USA/NOAA
DIF
Version 9.8.4
2018-12-11
2018-12-11