| タイトル | The Arctic Vortex in March 2011: A Dynamical Perspective |
| 本文（外部サイト） | http://hdl.handle.net/2060/20110015364 |
| 著者（英） | Hurwitz, Margaret M.; Garfinkel,Chaim I.; Newman, Paul A. |
| 著者所属（英） | NASA Goddard Space Flight Center |
| 発行日 | 2011-07-01 |
| 言語 | eng |
| 内容記述 | Despite the record ozone loss observed in March 2011, dynamical conditions in the Arctic stratosphere were unusual but not unprecedented. Weak planetary wave driving in February preceded cold anomalies in t he polar lower stratosphere in March and a relatively late breakup of the Arctic vortex in April. La Nina conditions and the westerly phas e of the quasi-biennial oscillation (QBO) were observed in March 201 1. Though these conditions are generally associated with a stronger vortex in mid-winter, the respective cold anomalies do not persist t hrough March. Therefore, the La Nina and QBO-westerly conditions cannot explain the observed cold anomalies in March 2011. In contrast, po sitive sea surface temperature anomalies in the North Pacific may ha ve contributed to the unusually weak tropospheric wave driving and s trong Arctic vortex in late winter 2011. |
| NASA分類 | Meteorology and Climatology |
| レポートNO | GSFC.JA.4757.2011 |
| 権利 | Copyright, Distribution as joint owner in the copyright |
