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| Titel |
Last interglacial model-data mismatch of thermal maximum temperatures partially explained |
| VerfasserIn |
P. Bakker, H. Renssen |
| 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. 4 ; Nr. 10, no. 4 (2014-08-29), S.1633-1644 |
| Datensatznummer |
250117032
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| Publikation (Nr.) |
 copernicus.org/cp-10-1633-2014.pdf |
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| Zusammenfassung |
| The timing of the last interglacial (LIG) thermal maximum across the globe
remains to be precisely assessed. Because of difficulties in establishing a
common temporal framework between records from different palaeoclimatic
archives retrieved from various places around the globe, it has not yet been
possible to reconstruct spatio-temporal variations in the occurrence of the
maximum warmth across the globe. Instead, snapshot reconstructions of warmest
LIG conditions have been presented, which have an underlying assumption that
maximum warmth occurred synchronously everywhere. Although known to be an
oversimplification, the impact of this assumption on temperature estimates
has yet to be assessed. We use the LIG temperature evolutions simulated by
nine
different climate models to investigate whether the assumption of
synchronicity results in a sizeable overestimation of the LIG thermal
maximum. We find that for annual temperatures, the overestimation is small,
strongly model-dependent (global mean 0.4 ± 0.3 °C)
and cannot explain the recently published 0.67 °C difference
between simulated and reconstructed annual mean temperatures during the LIG
thermal maximum. However, if one takes into consideration that temperature
proxies are possibly biased towards summer, the overestimation of the LIG
thermal maximum based on warmest month temperatures is non-negligible with a
global mean of 1.1 ± 0.4 °C. |
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