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| Titel |
A timescale analysis of the Northern Hemisphere temperature response to volcanic and solar forcing |
| VerfasserIn |
S. L. Weber |
| 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 (2005-12-05), S.9-17 |
| Datensatznummer |
250000076
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| Publikation (Nr.) |
 copernicus.org/cp-1-9-2005.pdf |
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| Zusammenfassung |
| The Northern Hemisphere temperature response
to volcanic and solar forcing in the time interval 1000–1850 AD is
studied using first a
set of simulations with an intermediate-complexity climate model, driven by
reconstructed forcings. Results are then compared with those obtained from
the seven high-resolution reconstructed temperature records for the last
millenium that are at present available. Focus of the
analysis is on the timescale dependence of the response. Results between the
model and the proxy-based reconstructions are remarkably
consistent. The response to solar forcing is found to equilibrate at
interdecadal timescales, reaching an equilibrium value for the regression
of 0.2–0.3°C per W/m2. The time interval between volcanic
eruptions is typically shorter than the dissipation timescale of the
climate system, so that the response to volcanic forcing
never equilibrates. As a result, the regression on the volcanic
forcing is always lower than the
equilibrium value and goes to zero for the longest temporal scales.
The trends over the pre-anthropogenic period are found to be relatively large
in all reconstructed temperature records, given the trends in the
reconstructed forcing and the equilibrium value for the regression.
This is at variance with a recent
claim that reconstructed temperature records underestimate climatic variations
at multi-centennial timescales. |
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