noaa-cave-13670
Diva de Maura Cave, Brazil 2700 Year Stalagmite Oxygen Isotope Data
Novello, V.F.; Cruz, F.W.; Karmann, I.; Burns, S.J.; Stríkis, N.M.; Vuille, M.; Cheng, H.; Edwards, R.L.; Santos, R.V.; Frigo, E.; Barreto, E.A.S.
Diva de Maura Cave, Brazil 2700 Year Stalagmite Oxygen Isotope Data
2012-12-26
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/13670
Investigator
V.F.
Novello
Investigator
F.W.
Cruz
Investigator
I.
Karmann
Investigator
S.J.
Burns
Investigator
N.M.
Stríkis
Investigator
M.
Vuille
Investigator
H.
Cheng
Investigator
R.L.
Edwards
Investigator
R.V.
Santos
Investigator
E.
Frigo
Investigator
E.A.S.
Barreto
earth science
paleoclimate
speleothems
delta 18O,calcium carbonate,null,per mil VPDB,null,speleothems,raw,isotope ratio mass spectrometry,N,null
earth science
paleoclimate
speleothems
age,null,null,year Common Era,null,speleothems,null,null,N,null
earth science
paleoclimate
speleothems
oxygen isotopes
geoscientificInformation
Monsoon
-815 AD
1911 AD
2765 cal yr BP
39 cal yr BP
Complete
-12.3667
-12.3667
-41.5667
-41.5667
680
680
Continent
South America
Brazil
Diva de Maura Cave>LATITUDE -12.3667>LONGITUDE -41.5667
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
Valdir F. Novello, Francisco W. Cruz, Ivo Karmann, Stephen J. Burns, Nicolás M. Stríkis, Mathias Vuille, Hai Cheng, R. Lawrence Edwards, Roberto V. Santos, Everton Frigo, and Eline A.S. Barreto. 2012.
Multidecadal climate variability in Brazil's Nordeste during the last 3000 years based on speleothem isotope records.
Geophysical Research Letters, Vol. 39, L23706.
DOI: 10.1029/2012GL053936
We present the first high resolution, approximately ~4 years sample spacing, precipitation record from northeastern Brazil (hereafter referred to as 'Nordeste') covering the last ~3000 yrs from 230Th-dated stalagmites oxygen isotope records. Our record shows abrupt fluctuations in rainfall tied to variations in the intensity of the South American summer monsoon (SASM), including the periods corresponding to the Little Ice Age (LIA), the Medieval Climate Anomaly (MCA) and an event around 2800 yr B.P. Unlike other monsoon records in southern tropical South America, dry conditions prevailed during the LIA in the Nordeste. Our record suggests that the region is currently undergoing drought conditions that are unprecedented over the past 3 millennia, rivaled only by the LIA period. Using spectral, wavelet and cross-wavelet analyses we show that changes in SASM activity in the region are mainly associated with variations of the Atlantic Multidecadal Oscillation (AMO) and to a lesser degree caused by fluctuations in tropical Pacific SST. Our record also shows a distinct periodicity around 210 years, which has been linked to solar variability.
STUDY NOTES: Stalagmite oxygen isotope (d18O) collected in the Diva de Maura, Torrinha and Lapa Doce cave systems, located near Iraquara City in Bahia State, in the southern portion of the Nordeste region of Brazil.
The DV2 sample is a 25-cm-long stalagmite collected in Diva Cave which grew continuously during most of the last 2850 years except for the last century.
The missing modern portion of the DV2 isotope record is complemented with the stalagmites TR5 and LD12 (12°20’S, 41°36’W) that cover the last 130 years.
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/southamerica/brazil/diva2012.txt
USA/NOAA
DIF
Version 9.8.4
2018-12-11
2018-12-11