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| Titel |
A new feedback on climate change from the hydrological cycle |
| VerfasserIn |
P. D. Williams, E. Guilyardi, R Sutton, J. Gregory, G. Madec |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250019269
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| Zusammenfassung |
| An intensification of the hydrological cycle is a likely consequence of global warming. But
changes in the hydrological cycle could affect sea-surface temperature by modifying diffusive
ocean heat transports. We investigate this mechanism by studying a coupled general
circulation model sensitivity experiment in which the hydrological cycle is artificially
amplified. We find that the amplified hydrological cycle depresses sea-surface temperature by
enhancing ocean heat uptake in low latitudes. We estimate that a 10% increase in the
hydrological cycle will contribute a basin-scale sea-surface temperature decrease of around
0.1∘C away from high latitudes, with larger decreases locally. We conclude that an intensified
hydrological cycle is likely to contribute a weak negative feedback to anthropogenic climate
change. |
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