Antarctic Ice Sheet paleo-constraint database
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Published:2023-08-10
Issue:8
Volume:15
Page:3573-3596
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ISSN:1866-3516
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Container-title:Earth System Science Data
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language:en
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Short-container-title:Earth Syst. Sci. Data
Author:
Lecavalier Benoit S., Tarasov Lev, Balco Greg, Spector Perry, Hillenbrand Claus-Dieter, Buizert ChristoORCID, Ritz CatherineORCID, Leduc-Leballeur MarionORCID, Mulvaney RobertORCID, Whitehouse Pippa L.ORCID, Bentley Michael J.ORCID, Bamber JonathanORCID
Abstract
Abstract. We present a database of observational constraints on past
Antarctic Ice Sheet changes during the last glacial cycle intended to
consolidate the observations that represent our understanding of past
Antarctic changes and for state-space estimation and paleo-model calibrations.
The database is a major expansion of the initial work of Briggs and Tarasov
(2013). It includes new data types and multi-tier data quality assessment.
The updated constraint database, AntICE2 (https://theghub.org/resources/4884, Lecavalier et al.,
2022), consists of observations of past
grounded- and floating-ice-sheet extent, past ice thickness, past relative
sea level, borehole temperature profiles, and present-day bedrock
displacement rates. In addition to paleo-observations, the present-day ice
sheet geometry and surface ice velocities are incorporated to constrain the
present-day ice sheet configuration. The method by which the data are curated
using explicitly defined criteria is detailed. Moreover, the observational
uncertainties are specified. The methodology by which the constraint
database can be applied to evaluate a given ice sheet reconstruction is
discussed. The implementation of the AntICE2 database for Antarctic Ice
Sheet model calibrations will improve Antarctic Ice Sheet predictions during
past warm and cold periods and yield more robust paleo-model spin ups for
forecasting future ice sheet changes.
Publisher
Copernicus GmbH
Subject
General Earth and Planetary Sciences
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