 |
| Titel |
The Arctic Amplification and inter-relation between Arctic Sea-Ice, cloud greenhouse heating and atmospheric circulation in ERA-Interim and EC-Earth |
| VerfasserIn |
Ulrika Willen, Richard Bintanja, Joseph Sedlar, Torben Königk, Klaus Wyser |
| Konferenz |
EGU General Assembly 2013
|
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250079728
|
|
|
|
|
|
| Zusammenfassung |
| The Arctic is warming faster than the global average especially in autumn and winter and substantial reductions in summer and winter sea-ice have been observed recently. It is also the part of the globe where climate model scenarios show the largest spread. Many recent observational data sets report significant amounts of mixed-phase clouds over the Arctic in all seasons. The frequent occurrence of Arctic mixed-phase clouds has important implications for the cloud radiative forcing at the surface, since mixed-phase clouds tend to be optically thicker than ice-only clouds and emit more downward long-wave flux which increases the surface temperature and sea-ice melt. A number of studies have shown that models underestimate the amount of cloud water in Arctic mixed-phase clouds. In this study we investigate how the amount of cloud liquid water in mixed-phase clouds affect the Arctic warming and sea-ice retreat in the global coupled climate model EC-Earth for AMIP, double CO2 and transient experiments. We also investigate how the cloud-radiation and sea-ice interactions affect the circulation in EC-Earth and in ERA-Interim reanalysis data. |
|
|
|
|
|
|