Abstract
AbstractHeight‐time domain empirical orthogonal function (EOF) analysis is conducted to extract the dominant variations in the evolution of sudden stratospheric warming events (SSWs). The EOF1 corresponds to weak (I+) and strong (I−) polar vortex before the onset of SSWs and EOF2 indicates strong (W+) and weak (W−) warming during SSWs. The development of I− SSWs is associated with stronger eddy heat flux contributed by planetary wavenumbers 1 and 2, whereas the I + SSWs is related to wavenumber 1. W + SSWs are linked to both wavenumbers 1 and 2, while the happening of W− SSWs is associated with wavenumber 1. SSWs of I+ and W+ can exert influence on the surface such as negative phase of the North Atlantic Oscillation, which indicates that SSWs with different initial polar vortex states and warming intensities lead to different surface influence. This could help to better predict the tropospheric response following SSWs.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
