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| Titel |
Solar irradiance reduction to counteract radiative forcing from a quadrupling of CO2: climate responses simulated by four earth system models |
| VerfasserIn |
H. Schmidt, K. Alterskjær, D. Bou Karam, O. Boucher, A. Jones, J. E. Kristjánsson, U. Niemeier, M. Schulz, A. Aaheim, F. Benduhn, M. Lawrence, C. Timmreck |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
2190-4979
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| Digitales Dokument |
URL |
| Erschienen |
In: Earth System Dynamics ; 3, no. 1 ; Nr. 3, no. 1 (2012-06-06), S.63-78 |
| Datensatznummer |
250000850
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| Publikation (Nr.) |
 copernicus.org/esd-3-63-2012.pdf |
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| Zusammenfassung |
| In this study we compare the response of four state-of-the-art Earth system
models to climate engineering under scenario G1 of two model intercomparison
projects: GeoMIP (Geoengineering Model Intercomparison Project) and IMPLICC
(EU project "Implications and risks of engineering solar radiation to limit
climate change"). In G1, the radiative forcing from an instantaneous
quadrupling of the CO2 concentration, starting from the preindustrial
level, is balanced by a reduction of the solar constant. Model responses to
the two counteracting forcings in G1 are compared to the preindustrial
climate in terms of global means and regional patterns and their robustness.
While the global mean surface air temperature in G1 remains almost unchanged
compared to the control simulation, the meridional temperature gradient is
reduced in all models. Another robust response is the global reduction of
precipitation with strong effects in particular over North and South America
and northern Eurasia. In comparison to the climate response to a quadrupling
of CO2 alone, the temperature responses are small in experiment G1.
Precipitation responses are, however, in many regions of comparable magnitude
but globally of opposite sign. |
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