Tropical-Extratropical Interactions Associated with East Asian Cold Air Outbreaks. Part I: Interannual Variability
Abstract
Interannual variability of winter-mean East Asian cold air outbreaks (CAOs) and its relationship with the tropical climate system during 56 boreal winters (DJF) are investigated. The magnitude of CAO is quantified as winter-mean equatorward cold airmass (CAM) flux below 280-K potential temperature across the 45°N latitude. EOF analysis shows that the interannual variation of East Asian CAOs is attributed mainly to the contributions from western and eastern CAOs. In particular, the western and eastern CAOs tend to be remotely forced by La Niña and El Niño events, respectively.
- Publication:
-
Journal of Climate
- Pub Date:
- April 2017
- DOI:
- 10.1175/JCLI-D-16-0152.1
- Bibcode:
- 2017JCli...30.2989A