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| Titel |
Testing GeoMIP |
| VerfasserIn |
Alan Robock, Ben Kravitz |
| Konferenz |
EGU General Assembly 2010
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 12 (2010) |
| Datensatznummer |
250041646
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| Zusammenfassung |
| To investigate the climate response to stratospheric geoengineering, particularly in the
hydrological cycle, standardized experiments for climate models have been proposed as part
of a project called GeoMIP. Proposals for sulfate or other aerosols have been widely
discussed, but GeoMIP proposes one experiment to simply reduce the solar constant to
compensate for increased radiative forcing from carbon dioxide as a simpler test that will be
easier to implement and interpret in different climate models. There are two such proposals,
building on experiments that will already be conducted as part of the CMIP5 suite of
experiments. In one, the solar constant will be reduced so as to keep global average surface
air temperature constant as CO2 increases at 1% per year starting from a control run. In the
other, the solar constant will be reduced so as to keep global average surface air temperature
constant in response to a step change of 4 times CO2. Each experiment has advantages
and disadvantages. Here we will perform both experiments with the new NASA
GISS climate model, the next version of ModelE, that will be used for the CMIP5
experiments, and diagnose the results to both compare them to each other, but also
to learn how representative they are as compared to more realistic experiments
that actually produce stratospheric aerosols and calculate the climate response. |
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