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  Quantifying Southern Annular Mode paleo-reconstruction skill in a model framework

Huiskamp, W. N., McGregor, S. (2021): Quantifying Southern Annular Mode paleo-reconstruction skill in a model framework. - Climate of the Past, 17, 5, 1819-1839.
https://doi.org/10.5194/cp-17-1819-2021

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 Urheber:
Huiskamp, Willem Nicholas1, Autor              
McGregor, Shayne2, Autor
Affiliations:
1Potsdam Institute for Climate Impact Research, ou_persistent13              
2External Organizations, ou_persistent22              

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 Zusammenfassung: Past attempts to reconstruct the Southern Annular Mode (SAM) using paleo archives have resulted in records which can differ significantly from one another prior to the window over which the proxies are calibrated. This study attempts to quantify not only the skill with which we may expect to reconstruct the SAM, but also assess the contribution of regional bias in proxy selection and the impact of non-stationary proxy-SAM teleconnections on a resulting reconstruction. This is achieved using a pseudo-proxy framework with output from the CM2.1 global climate model. Reconstructions derived from precipitation fields perform better, with 89 % of reconstructions calibrated over a 61 year window able to reproduce at least 50 % of inter-annual variance in the SAM, as opposed to just 25 % for surface temperature (SAT) derived reconstructions. Non-stationarity of proxy-SAM teleconnections, as defined here, plays a negligible role in reconstructions, however the range in reconstruction skill is not negligible. Reconstructions were most likely to be skilful when proxies are sourced from a geographically broad region, with a network size of 70 proxies.

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Sprache(n): eng - Englisch
 Datum: 2021-08-022021-09-132021-09-20
 Publikationsstatus: Final veröffentlicht
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: DOI: 10.5194/cp-17-1819-2021
MDB-ID: No data to archive
Organisational keyword: RD1 - Earth System Analysis
PIKDOMAIN: RD1 - Earth System Analysis
Research topic keyword: Paleoclimate
Regional keyword: Oceania/Australia
Regional keyword: South America
Regional keyword: Arctic & Antarctica
Working Group: Long-Term Dynamics of the Earth System
OATYPE: Gold Open Access
 Art des Abschluß: -

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Titel: Climate of the Past
Genre der Quelle: Zeitschrift, SCI, Scopus, p3, oa
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Ort, Verlag, Ausgabe: -
Seiten: - Band / Heft: 17 (5) Artikelnummer: - Start- / Endseite: 1819 - 1839 Identifikator: CoNE: https://publications.pik-potsdam.de/cone/journals/resource/journals78
Publisher: Copernicus