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4. AAS_4537_Law_Dome_2k_SST_Reconstruction

Description

This dataset contains a 2000 year sea surface reconstruction and Atlantic Meridional Overturning Circulation (AMOC) index reconstruction based on proxy records from the Law Dome ice core record (see https://data.aad.gov.au/metadata/DSS_2k_data_compilation).

The calibration target for the sea surface reconstruction is the ERSSTv5 reanalysis sea surface temperature anomaly for the period 1854-2015CE, with the anomalies calculated relative to the 1971-2000 climatology. The monthly SSTA data were averaged over the calendar year (January- December) to give an annual value used in the reconstruction. For reconstructing the AMOC, the HadISST reanalysis was used.

The sea surface temperature reconstruction for each two degree of longitude and latitude cell has been calculated using a multi-variate linear regression including sea salt and snow accumulation records from the Law Dome ice core. The 95% confidence interval was constructed using a circular bootstrapping method. The SST dataset comprises the reconstructed SSTA value, and upper and lower confidence interval values over the last 2000 years for each two degree by two degree cell. The AMOC reconstruction dataset consists of the calculated AMOC index with a 2-year and 50-year Gaussian smooth applied over the 2000 years

More information on the reconstructions can be found in the accompanying publication: L.M. Jong, J. L. Roberts, A. D. Moy, M. A. J. Curran,: Reconstructing 2000 years of sea surface temperatures from an East Antarctic ice core: A volcanic end to the Medieval Climate Anomaly Law Dome, East Antarctica [submitted], Geophysical Research Letters

The two files in this dataset are:
sst_reconstruction_2000years.nc
AMOC_reconstruction_2000years.csv

Access

These data are not yet publicly available for download.

Temporal Coverages

• Start date: 2001-01-01 - Stop date: 2015-12-31

Spatial Coverages

Data Resolution

Science Keywords

• EARTH SCIENCE > CLIMATE INDICATORS > PALEOCLIMATE INDICATORS > PALEOCLIMATE RECONSTRUCTIONS > SEA SURFACE TEMPERATURE RECONSTRUCTION
• EARTH SCIENCE > CLIMATE INDICATORS > PALEOCLIMATE INDICATORS > ICE CORE RECORDS
• EARTH SCIENCE > OCEANS > OCEAN TEMPERATURE > SEA SURFACE TEMPERATURE > SEA SURFACE TEMPERATURE ANOMALY
• EARTH SCIENCE > OCEANS > OCEAN TEMPERATURE > SEA SURFACE TEMPERATURE

Use Constraints

This data set conforms to the CCBY Attribution License (http://creativecommons.org/licenses/by/4.0/).

Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=AAS_4537_Law_Dome_2k_SST_Reconstruction when using these data.