| タイトル | What Controls the Temperature of the Arctic Stratosphere during the Spring? |
| 本文（外部サイト） | http://hdl.handle.net/2060/20000116212 |
| 著者（英） | Rosenfield, Joan E.; Nash, Eric R.; Einaudi, Franco; Newman, Paul A. |
| 著者所属（英） | NASA Goddard Space Flight Center |
| 発行日 | 2000-01-01 |
| 言語 | eng |
| 内容記述 | Understanding the mechanisms that control the temperature of the polar lower stratosphere during spring is key to understanding ozone loss in the Arctic polar vortex. Spring ozone loss rates are directly tied to polar stratospheric temperatures by the formation of polar stratospheric clouds, and the conversion of chlorine species to reactive forms on these cloud particle surfaces. In this paper, we study those factors that control temperatures in the polar lower stratosphere. We use the National Centers for Environmental Prediction (NCEP)/NCAR reanalysis data covering the last two decades to investigate how planetary wave driving of the stratosphere is connected to polar temperatures. In particular, we show that planetary waves forced in the troposphere in mid- to late winter (January-February) are principally responsible for the mean polar temperature during the March period. These planetary waves are forced by both thermal and orographic processes in the troposphere, and propagate into the stratosphere in the mid and high latitudes. Strong mid-winter planetary wave forcing leads to a warmer Arctic lower stratosphere in early spring, while weak mid-winter forcing leads to cooler Arctic temperatures. |
| NASA分類 | Geophysics |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/226589 |
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