noaa-tree-9910
South America 180 Year Tree Ring Stable Isotope Data
Ballantyne, A.; Baker, P.A.; Chambers, J.Q.; Villalba, R.; Argollo, J.
South America 180 Year Tree Ring Stable Isotope Data
2010-12-16
NCDC-Paleoclimatology
ONLINE Files
10.25921/p9f9-ck54
https://www.ncdc.noaa.gov/paleo/study/9910
Investigator
A.
Ballantyne
Investigator
P.A.
Baker
Investigator
J.Q.
Chambers
Investigator
R.
Villalba
Investigator
J.
Argollo
earth science
paleoclimate
tree ring
delta 18O,alpha cellulose,null,per mil SMOW,null,tree ring,null,isotope ratio mass spectrometry,N,null
earth science
paleoclimate
tree ring
delta 13C,alpha cellulose,null,per mil PDB,null,tree ring,null,isotope ratio mass spectrometry,N,null
earth science
paleoclimate
tree ring
age,null,null,year Common Era,null,tree ring,null,null,N,null
earth science
paleoclimate
tree-ring
carbon isotopes
earth science
paleoclimate
tree-ring
oxygen isotopes
geoscientificInformation
Monsoon
PAGES 2k Network
PAGES LOTRED SA2k
Tropics
drought
CEOD
Cedrela odorata L.
1820 AD
2004 AD
130 cal yr BP
-54 cal yr BP
Complete
-22
-12.6
-69.2
-66
265
3500
Continent
South America
Peru
Puerto Maldonado>LATITUDE -12.6>LONGITUDE -69.2
Continent
South America
Argentina
Volcan Granada>LATITUDE -22>LONGITUDE -66
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
Ballantyne, A.P., P.A. Baker, J.Q. Chambers, R. Villalba,
and J. Argollo. 2011.
Regional differences in South American monsoon precipitation
inferred from the growth and isotopic composition of tropical trees.
Earth Interactions. doi: 10.1175/2010EI277.1
We present results on the relationship between tree ring proxies
and regional precipitation for several sites in tropical South
America. The responsiveness of oxygen isotopes (d18O) and seasonal
growth as precipitation proxies was first validated by high-
resolution sampling of a Tachigali myrmecophila from Manaus,
Brazil (3.1ºS, 60.0ºW). Monthly growth of Tachigali spp. was
significantly correlated with monthly precipitation. Intra-annual
measurements of cellulose d18O in Tachigali spp. were also
significantly correlated with monthly precipitation at a lag of
approximately one month. The annual ring-widths of two tropical
tree taxa, Cedrela odorata growing in the Amazon (12.6ºS, 69.2ºW)
and Polylepis tarapacana growing in the Altiplano (22.0ºS, 66.0ºW),
were validated using bomb-derived radiocarbon 14C. Estimated dates
were within two to three years of bomb inferred 14C dates,
indicating that these species exhibit annual rings but uncertainties
in our chronologies remain. A multi-proxy record spanning 180 years
from Cedrela spp. showed a significant negative relationship between
cellulose d18O and January precipitation. A 150-year record obtained
from Polylepis spp. also showed a significant negative relationship
between d18O and March precipitation, whereas annual ring width
showed a significant positive correlation with December precipitation.
These proxies were combined in a multivariate framework to reconstruct
past precipitation, revealing a significant increase in monsoon
precipitation at the Amazon site since 1890 and a significant decrease
in monsoon precipitation at the Altiplano since 1880. Proxy time
series also showed spatial and temporal coherence with precipitation
variability due to El Niño forcing, suggesting that oxygen isotopes
and ring widths in tropical trees may be important diagnostics for
identifying regional differences in the response of the tropical
hydrologic cycle to anthropogenic warming.
STUDY NOTES: Tree ring isotope data from two South American locations and species,
Cedrela odorata from the upper Amazon Basin and Polylepis tarapacana
from the Altiplano. The isotope data correlate with seasonal
precipitation and provide a monsoon strength signal for the Amazon
and Altiplano for the past 180 years.
IITRDB006
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/treering/isotope/southamerica/ballantyne2011tr-iso.xls
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/treering/isotope/southamerica/ballantyne2011tr-iso.txt
USA/NOAA
DIF
Version 9.8.4
2019-03-01
2019-03-01