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Influence of Mean Climate Change on Climate Variability from a 155-year Tropical Pacific Coral Record from WDC/Paleoclimatology Entry ID: NOAA_NGDC_PALEO_URBAN_CORAL |
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Summary
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Abstract:
[Summary from the online data description "ftp://ftp.ngdc.noaa.gov/paleo/coral/west_pacific/readme_maiana.txt"] This data set is a 155-year ENSO reconstruction from a central tropical Pacific coral that provides new evidence for long-term changes in the regional mean climate and its variability. A gradual transition in the early 20th century and the abrupt change in 1976, both towards warmer/wetter conditions, co-occur with changes in variability. In the mid-late 19th century, cooler/drier background conditions coincided with prominent decadal variability; in the early 20th century, shorter-period (~2.9 years) variability intensified. After 1920, variability weakens and becomes focused at interannual time scales; with the shift in 1976, variability with a period of about 4 years becomes prominent. Our results suggest that variability in the tropical Pacific is linked to the region's mean climate, and that changes in both have occurred during periods of natural as well as anthropogenic climate forcing. Sampling and isotopic analysis: Cores (8.5 cm diameter) drilled from living coral colonies were slabbed and X-rayed to identify annual density bands and optimal sampling transects. Samples were drilled along the growth axis continuously at 1mm resolution. Stable isotopic analysis (d18O and d13C) of powdered samples was performed on a Micromass Optima with Isocarb automated preparation system at the University of Colorado's Institute for Arctic and Alpine Research. Analytical precision is =10.08 d18O and =10.05 d13C. The Maiana record is continuous except for a gap from 1901-1905, which we bridged through straight forward comparison and splicing of data from a coral record from nearby Tarawa Atoll. |
Related URL
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Link:
GET DATA
Description: Description of tropical coral data Link: GET DATA Description: Bimonthly del 18O data |
Geographic Coverage
| N: 1.0 | S: 1.0 | E: 173.0 | W: 173.0 |
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Data Set Citation
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Dataset Originator/Creator:
Urban, F.E., J.E. Cole, and J.T. Overpeck
Dataset Title: Maiana Coral Oxygen Isotope Data Dataset Release Date: 2000 Dataset Release Place: Boulder, CO Dataset Publisher: NOAA/NCDC Paleoclimatology Program Issue Identification: IGBP PAGES/WDC Data Contribution Series #2000-063 Online Resource: http://www.ngdc.noaa.gov/paleo/pubs/urban2000/ |
Temporal Coverage
| Start Date: 1840-01-01 |
| Stop Date: 1995-12-31 |
Location Keywords
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OCEAN
> ARCTIC OCEAN
OCEAN > PACIFIC OCEAN GEOGRAPHIC REGION > POLAR |
Data Resolution
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Temporal Resolution:
bimonthly
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Science Keywords
| OCEANS >COASTAL PROCESSES >CORAL REEFS [Definition] |
| OCEANS >OCEAN CHEMISTRY >OXYGEN >DEL 18O [Definition] |
| OCEANS >OCEAN CHEMISTRY >STABLE ISOTOPES >OXYGEN ISOTOPES [Definition] |
| OCEANS >OCEAN TEMPERATURE >SEA SURFACE TEMPERATURE [Definition] |
| CLIMATE INDICATORS >ATMOSPHERIC/OCEAN INDICATORS >TELECONNECTIONS >EL NINO SOUTHERN OSCILLATION (ENSO) >ENSO [Definition] |
ISO Topic Category
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CLIMATOLOGY/METEOROLOGY/ATMOSPHERE
GEOSCIENTIFIC INFORMATION OCEANS |
Project
| IGBP >International Geosphere-Biosphere Programme [Information] |
| PAGES >Past Global Changes, IGBP [Information] |
Access Constraints
| None |
Use Constraints
| None |
Keywords
| CLIMATE VARIABILITY |
| DEL 18O |
| EL NINO SOUTHERN OSCILLATION |
| ENSO |
| MAIANA ATOLL |
| OXYGEN ISOTOPES |
Data Set Progress
| COMPLETE |
Originating Center
| NOAA/NESDIS/NGDC |
Data Center
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World Data Center for Paleoclimatology, Boulder
[Information]
Data Center URL: http://www.ncdc.noaa.gov/paleo/
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Distribution
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Distribution_Media:
online ftp, www
Distribution_Format: ascii Fees: None |
Personnel
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JULIA
E.
COLE Role: INVESTIGATOR Phone: (303) 492-0595 Fax: (303) 492-6388 Contact Address: Department of Geosciences University of Arizona City: Tucson Province or State: AZ Country: USA |
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JONATHAN
T.
OVERPECK Role: INVESTIGATOR Email: jto at email.arizona.edu Contact Address: Institute of the Environment Department of Geosciences University of Arizona City: Tucson Province or State: AZ Postal Code: 85721-0077 Country: USA |
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F.
E.
URBAN Role: INVESTIGATOR Contact Address: University of Colorado Institute of Arctic and Alpine Research City: Boulder Province or State: CO Country: USA |
Publications/References
Urban, F.E., J. E. Cole, and J.T. Overpeck, 2000, Influence of mean
climate change on climate variability from a 155-year tropical Pacific
coral record. Nature 407, 989-993
climate change on climate variability from a 155-year tropical Pacific
coral record. Nature 407, 989-993
Creation and Review Dates
DIF Creation Date:
2000-12-08
Last DIF Revision Date:
2012-08-31
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