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| Titel |
Seasonal mean pressure reconstruction for the North Atlantic (1750–1850) based on early marine data |
| VerfasserIn |
D. Gallego, R. Garcia-Herrera, P. Ribera, P. D. Jones |
| 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 ; 1, no. 1 ; Nr. 1, no. 1 (2005-12-08), S.19-33 |
| Datensatznummer |
250000077
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| Publikation (Nr.) |
 copernicus.org/cp-1-19-2005.pdf |
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| Zusammenfassung |
| Measurements of wind strength and direction abstracted from European ships'
logbooks during the recently finished CLIWOC project have been used to
produce the first gridded Sea Level Pressure (SLP) reconstruction for the
1750–1850 period over the North Atlantic based solely on marine data. The
reconstruction is based on a spatial regression analysis calibrated by using
data taken from the ICOADS database. An objective methodology has been
developed to select the optimal calibration period and spatial domain of the
reconstruction by testing several thousands of possible models. The finally
selected area, limited by the performance of the regression equations and by
the availability of data, covers the region between 28° N and
52° N close to the European coast and between 28° N and
44° N in the open Ocean. The results provide a direct measure of the
strength and extension of the Azores High during the 101 years of the study
period. The comparison with the recent land-based SLP reconstruction by
Luterbacher et al. (2002) indicates the presence of a common signal. The
interannual variability of the CLIWOC reconstructions is rather high due to
the current scarcity of abstracted wind data in the areas with best response
in the regression. Guidelines are proposed to optimize the efficiency of
future abstraction work. |
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