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| Titel |
Implication of methodological uncertainties for mid-Holocene sea surface temperature reconstructions |
| VerfasserIn |
I. Hessler, S. P. Harrison, M. Kucera, C. Waelbroeck, M.-T. Chen, C. Anderson, A. de Vernal, B. Fréchette, A. Cloke-Hayes, G. Leduc, L. Londeix |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1814-9324
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| Digitales Dokument |
URL |
| Erschienen |
In: Climate of the Past ; 10, no. 6 ; Nr. 10, no. 6 (2014-12-17), S.2237-2252 |
| Datensatznummer |
250117088
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| Publikation (Nr.) |
 copernicus.org/cp-10-2237-2014.pdf |
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| Zusammenfassung |
| We present and examine a multi-sensor global compilation of mid-Holocene
(MH) sea surface temperatures (SST), based on Mg/Ca and alkenone
palaeothermometry and reconstructions obtained using planktonic foraminifera
and organic-walled dinoflagellate cyst census counts. We assess the
uncertainties originating from using different methodologies and evaluate
the potential of MH SST reconstructions as a benchmark for climate-model
simulations. The comparison between different analytical approaches (time
frame, baseline climate) shows the choice of time window for the MH has a
negligible effect on the reconstructed SST pattern, but the choice of
baseline climate affects both the magnitude and spatial pattern of the
reconstructed SSTs. Comparison of the SST reconstructions made using
different sensors shows significant discrepancies at a regional scale, with
uncertainties often exceeding the reconstructed SST anomaly. Apparent
patterns in SST may largely be a reflection of the use of different sensors
in different regions. Overall, the uncertainties associated with the SST
reconstructions are generally larger than the MH anomalies. Thus, the SST
data currently available cannot serve as a target for benchmarking model
simulations. Further evaluations of potential subsurface and/or seasonal
artifacts that may contribute to obscure the MH SST reconstructions are
urgently needed to provide reliable benchmarks for model evaluations. |
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