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| Titel |
New insights into the reconstructed temperature in Portugal over the last 400 years |
| VerfasserIn |
J. A. Santos, M. F. Carneiro, A. Correia, M. J. Alcoforado, E. Zorita, J. J. Gómez-Navarro |
| 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 ; 11, no. 6 ; Nr. 11, no. 6 (2015-06-05), S.825-834 |
| Datensatznummer |
250117316
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| Publikation (Nr.) |
 copernicus.org/cp-11-825-2015.pdf |
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| Zusammenfassung |
| The consistency of an existing reconstructed annual (December–November)
temperature series for the Lisbon region (Portugal) from 1600 onwards, based
on a European-wide reconstruction, with (1) five local borehole
temperature–depth profiles; (2) synthetic temperature–depth profiles,
generated from both reconstructed temperatures and two regional paleoclimate
simulations in Portugal; (3) instrumental data sources over the twentieth
century; and (4) temperature indices from documentary sources during the late
Maunder Minimum (1675–1715) is assessed. The low-frequency variability in
the reconstructed temperature in Portugal is not entirely consistent with
local borehole temperature–depth profiles and with the simulated response of
temperature in two regional paleoclimate simulations driven by
reconstructions of various climate forcings. Therefore, the existing
reconstructed series is calibrated by adjusting its low-frequency variability
to the simulations (first-stage adjustment). The annual reconstructed series
is then calibrated in its location and scale parameters, using the
instrumental series and a linear regression between them (second-stage
adjustment). This calibrated series shows clear footprints of the Maunder and
Dalton minima, commonly related to changes in solar activity and explosive
volcanic eruptions, and a strong recent-past warming, commonly related to
human-driven forcing. Lastly, it is also in overall agreement with annual
temperature indices over the late Maunder Minimum in Portugal. The series
resulting from this post-reconstruction adjustment can be of foremost
relevance to improve the current understanding of the driving mechanisms of
climate variability in Portugal. |
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