 |
| Titel |
Southern westerlies in LGM and future (RCP4.5) climates |
| VerfasserIn |
Y. Chavaillaz, F. Codron, M. Kageyama |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1814-9324
|
| Digitales Dokument |
URL |
| Erschienen |
In: Climate of the Past ; 9, no. 2 ; Nr. 9, no. 2 (2013-03-01), S.517-524 |
| Datensatznummer |
250018003
|
| Publikation (Nr.) |
 copernicus.org/cp-9-517-2013.pdf |
|
|
|
|
|
| Zusammenfassung |
| Mid-latitude westerlies are a major component of the atmospheric
circulation and understanding their behaviour under climate change
is important for understanding changes in precipitation, storms and
atmosphere–ocean momentum, heat and CO2 exchanges. The Southern
Hemisphere westerlies have been particularly studied in terms of the
latter aspects, since the Southern Ocean is a key region for the
global oceanic circulation as well as for CO2 uptake. In this
study, we analyse, mainly in terms of jet stream position, the
behaviour of the southern westerlies for the Last Glacial Maximum
(LGM, 21 000 yr ago, which is the last past cold extreme) and for
a future climate, obtained after stabilisation of the RCP4.5
scenario. The a priori guess would be that the behaviour of the
westerly jet stream would be similar when examining its changes from
LGM to pre-industrial (PI) conditions and from PI to RCP4.5, i.e. in
both cases a poleward shift in response to global warming. We show
that this is in fact not the case, due to the impact of altitude
changes of the Antarctic ice sheet and/or to sea ice cover
changes. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|