[Parameters: Topic='PALEOCLIMATE', Term='ICE CORE RECORDS', Variable_Level_1='ISOTOPES']
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Law Dome d18O data 2100BP to 1996 as 4-year averages Entry ID: ASAC_757_LD_d18O |
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Summary
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Abstract:
LD2.1ky-grid4y - Law Dome d18O data 2100BP (Present=2000AD) to 1996 as 4-year averages. Data set used in: Jones, P.D. and M.E. Mann, Climate Over Past Millennia, Rev. Geo. 42(2), RG2002, doi:10.1029/2003RG000143, Mann, M.E. and Jones, P.D. Global Surface Temperatures over the Past Two Millennia, GRL 30(15), 1820, doi: 10.1029/2003GL017814 Records for this site are in active development: check with tas.van.ommen@aad.gov.au for information on updated or improved Law Dome isotope data sets. Notes: Ages older than 700BP estimated from flow-model constrained by layer-thickness data (similar to Morgan et al., J. Glaciol, 43(143), 3-10, 1997). Estimated error at 2ky BP on the order of a few decades. Ages younger than 700BP from layer counting. Estimated error +/-1 year at 700BP scaling to absolute (zero error) from 193-0BP. d18O values in permille. Approximate accuracy of individual measurements 0.1 permille, but each datum presented here is an integration of between 4 and 40 individual measurements, dependent upon age and sampling scheme. For conversion to temperature, values of ~0.2-0.3 permille/degreeC are deduced from short-term comparisons. Longer term comparison of seasonal amplitude (van Ommen and Morgan, JGR, 102(D8), 1997) indicates conversion coefficient of 0.44 permille/degree C. Spatially derived conversion coefficients are on the order of 0.6-0.7 permille/degree C, but are unlikely to be appropriate. Note on annual phasing: A year for the purposes of averaging of the resolved-annual cycles, is by convention marked by the isotope maximum. Thus, calendar year 1994, for example, starts with the isotope peak in the Austral summer of 1993/1994 and concludes at the 1994/1995 peak. Studies show that on the average, the isotope peak occurs around January 10 (van Ommen and Morgan, JGR, 102(D8), 9351-9357, 1997). This work was completed as part of ASAC/AAS project 757. |
Related URL
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Link:
GET DATA
Description: Download point for the text file of data. Link: VIEW PROJECT HOME PAGE Description: Public information for ASAC project 757 Link: VIEW RELATED INFORMATION Description: Citation reference for this metadata record and dataset |
Parent DIF
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This data set description is a member of a collection. The collection is described in ASAC_757 |
Geographic Coverage
| N: -66.7 | S: -66.8 | E: 112.9 | W: 112.8 |
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Temporal Coverage
| Start Date: 2010-04-08 |
| Stop Date: 2010-04-08 |
Paleo_Temporal_Coverage
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Paleo Start Date:
2100 YBP
Paleo Stop Date: 1996 Chrono Unit: |
Location Keywords
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CONTINENT
> ANTARCTICA
> Law Dome
GEOGRAPHIC REGION > POLAR |
Science Keywords
| ATMOSPHERE >ATMOSPHERIC TEMPERATURE >AIR TEMPERATURE [Definition] |
| ATMOSPHERE >ATMOSPHERIC TEMPERATURE [Definition] |
| PALEOCLIMATE >ICE CORE RECORDS >ISOTOPES [Definition] |
| PALEOCLIMATE >PALEOCLIMATE RECONSTRUCTIONS >AIR TEMPERATURE RECONSTRUCTION [Definition] |
| ATMOSPHERE >ATMOSPHERIC CHEMISTRY >OXYGEN COMPOUNDS [Definition] |
ISO Topic Category
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CLIMATOLOGY/METEOROLOGY/ATMOSPHERE
ENVIRONMENT |
Platform
| FIELD SURVEYS [Information] |
Quality
| This is an older dataset that is actively being updated. It is therefore recommended that users contact the investigator before using these data to check if a more up-to-date version is available. |
Access Constraints
| These data are publicly available for download from the provided URL. |
Use Constraints
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This data set conforms to the PICCCBY Attribution License (http://creativecommons.org/licenses/by/3.0/). Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=ASAC_757... when using these data. |
Keywords
| ice cores |
| DSS |
| isotopes |
| temperatures |
Data Set Progress
| COMPLETE |
Data Center
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Australian Antarctic Data Centre, Australia
[Information]
Data Center URL: http://data.aad.gov.au
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Distribution
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Distribution_Media:
HTTP
Distribution_Size: 4 kb Distribution_Format: text Fees: free |
Personnel
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TAS
VAN OMMEN Role: INVESTIGATOR Role: TECHNICAL CONTACT Phone: +61 3 6226 2981 Email: tas.van.ommen at utas.edu.au Contact Address: Antarctic Climate and Ecosystems CRC University of Tasmania Grosvenor St City: Sandy Bay Province or State: Tasmania Postal Code: 7005 Country: Australia |
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DAVE
CONNELL Role: DIF AUTHOR Phone: +61 3 6232 3244 Fax: +61 3 6232 3351 Email: dave.connell at aad.gov.au Contact Address: Australian Antarctic Division 203 Channel Highway City: Kingston Province or State: Tasmania Postal Code: 7050 Country: Australia |
Publications/References
Jones, P.D. and M.E. Mann (2004), Climate Over Past Millennia, Reviews of Geophysics, 42, 2, 42, doi:doi:10.1029/2003RG000143, RG2002
Mann, M.E. and Jones, P.D. (2003), Global Surface Temperatures over the Past Two Millennia, Geophysical Research Letters, 30, 15, 1820, doi:doi: 10.1029/2003GL017814
Mann, M.E. and Jones, P.D. (2003), Global Surface Temperatures over the Past Two Millennia, Geophysical Research Letters, 30, 15, 1820, doi:doi: 10.1029/2003GL017814
Creation and Review Dates
DIF Creation Date:
2010-04-08
Last DIF Revision Date:
2012-06-04
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