noaa-lake-12199
Laguna Pumacocha, Peru, Holocene Stable Isotope Data
Bird, B.W.; Abbott, M.B.; Rodbell, D.; Vuille, M.
Laguna Pumacocha, Peru, Holocene Stable Isotope Data
2011-09-30
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/12199
Investigator
B.W.
Bird
Investigator
M.B.
Abbott
Investigator
D.
Rodbell
Investigator
M.
Vuille
earth science
paleoclimate
instrumental
collection date,null,null,null,null,instrumental,null,null,C,null
earth science
paleoclimate
paleolimnology
delta 18O,calcite,null,per mil VPDB,null,paleolimnology,null,isotope ratio mass spectrometry,N,sediment trap data
earth science
paleoclimate
instrumental
delta 18O,lake water,null,per mil VSMOW,null,instrumental,null,isotope ratio mass spectrometry,N,surface water
earth science
paleoclimate
instrumental
collection water depth,null,null,meter,null,instrumental,null,null,N,null
earth science
paleoclimate
instrumental
alkalinity,lake water,null,milligram per liter,null,instrumental,null,null,N,null
earth science
paleoclimate
paleolimnology
collection water depth,null,null,centimeter,null,paleolimnology,null,null,N,null
earth science
paleoclimate
paleolimnology
delta 13C,carbonate,null,per mil VPDB,null,paleolimnology,null,isotope ratio mass spectrometry,N,null
earth science
paleoclimate
paleolimnology
delta 13C,calcite,null,per mil VPDB,null,paleolimnology,null,isotope ratio mass spectrometry,N,sediment trap data
earth science
paleoclimate
instrumental
delta 2H,lake water,null,per mil VSMOW,null,instrumental,null,isotope ratio mass spectrometry,N,surface water
earth science
paleoclimate
paleolimnology
collection date,null,null,null,null,paleolimnology,null,null,C,null
earth science
paleoclimate
paleolimnology
age,null,null,calendar year before present,null,paleolimnology,null,null,N,null
earth science
paleoclimate
paleolimnology
delta 18O,carbonate,null,per mil VPDB,null,paleolimnology,null,isotope ratio mass spectrometry,N,null
earth science
paleoclimate
paleolimnology
oxygen isotopes
earth science
paleoclimate
paleolimnology
carbon isotopes
geoscientificInformation
Monsoon
PAGES 2k Network
PAGES LOTRED SA2k
11142 cal yr BP
-57 cal yr BP
Complete
-10.7002
-10.7002
-76.0605
-76.0605
4300
4300
Continent
South America
Peru
Laguna Pumacocha>LATITUDE -10.7002>LONGITUDE -76.0605
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
Bird, B.W., M.A. Abbott, D.T. Rodbell, and M. Vuille. 2011.
Holocene tropical South American hydroclimate revealed from
a decadally resolved lake sediment d18O record.
Earth and Planetary Science Letters, Vol. 310, Issues 3-4,
15 October 2011, pp. 192-202. doi: 10.1016/j.epsl.2011.08.040
Oxygen isotope ratios of authigenic calcite (d18Ocal) measured
at annual to decadal resolution from Laguna Pumacocha document
Andean precipitation variability during the last 11,200 years.
Modern limnological data show that Pumacocha d18Ocal reflects
the average annual isotopic composition of the lake's surface
waters (d18Olw), and that d18Olw tracks the isotopic composition
of precipitation (d18Oprecip), which is largely controlled by the
intensity of the South American summer monsoon (SASM). Based on
these relationships we use down-core d18Ocal measurements as
a proxy for d18Oprecip that varies with the intensity of SASM
precipitation. Pumacocha d18Ocal increased rapidly between 11,200
and 10,300 yr B.P. from -14.5‰ to -10.5‰, reaching a maximum of
-10.3‰ by 9800 yr B.P. After 9800 yr B.P., d18Ocal underwent a
long-term decrease that tracked increasing Southern Hemisphere
summer insolation, suggesting that enhanced SASM precipitation
was linked to precessional forcing. Higher-frequency trends did
not follow insolation and therefore represent other variability
in the climate system. Millennial-scale trends from Pumacocha
strongly resemble those from lower-resolution tropical Andean
ice and lake core isotopic records, particularly the Huascaran
ice core, and low elevation speleothems. These relationships
suggest that tropical Andean isotopic records reflect variations
in precipitation intensity related to precessional forcing rather
than tropical temperatures. They also demonstrate a coherent
pattern of SASM variability, although with differences between
low elevation and Andean records during the late Glacial to Holocene
transition and the late Holocene. Centennial and decadal SASM
precipitation variability is also apparent. Reduced SASM rainfall
occurred from 10,000-9200, 7000-5000, 1500-900 yr B.P. and during
the last 100 years. Intensifications of the SASM occurred at 5000,
2200-1500, and 550-130 yr B.P. with the amplitude of variability
increasing after 2200 yr B.P. These periods may represent SASM
responses to ocean-atmosphere variability related to orbital
and radiative forcing (e.g., El Niño-Southern Oscillation
and the Intertropical Convergence Zone).
STUDY NOTES: Stable isotope and limnological data from Laguna Pumacocha, Peru,
spanning the last 11,000 years. 0 yr B.P. = AD 1950
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/southamerica/peru/pumacocha2011b.txt
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/southamerica/peru/pumacocha2011b.xls
USA/NOAA
DIF
Version 9.8.4
2018-12-11
2018-12-11