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| Titel |
Thermal log analysis for recognition of ground surface temperature change and water movements |
| VerfasserIn |
M. Verdoya, P. Chiozzi, V. Pasquale |
| 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 ; 3, no. 2 ; Nr. 3, no. 2 (2007-06-15), S.315-324 |
| Datensatznummer |
250000900
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| Publikation (Nr.) |
 copernicus.org/cp-3-315-2007.pdf |
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| Zusammenfassung |
| A joint analysis of surface air temperature series recorded at
meteorological stations and temperature-depth profiles logged in nearby
boreholes was performed to estimate conditions existing prior to the
beginning of the instrumental record in central-northern Italy. The adopted
method considers conductive and advective heat transport in a layered medium
and provides simultaneous estimates of the pre-observational temperatures
and the Darcy velocities. The reconstruction of the ground surface
temperature history using a generalised least-squares inversion method was
performed for boreholes where hydrological disturbances to measured
temperature logs were proved negligible. Both methods revealed generally
coherent climatic changes in the whole investigated area. Climatic
conditions were generally warm and comparable with the reference period
1960–1990. The absence of the Little Ice Age seems to be a generic feature
of the climate in central-northern Italy. Climate change of the 19th
century was generally insignificant with well-balanced periods of cold and
warmth. The investigated area became significantly colder only at the end of
the 19th century. Cooling culminated around 1950 when it was replaced
by rapid warming. Recent warming was not inferred only for one of the
investigated holes. |
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