Propagation of planetary-scale zonal mean wind anomalies and polar oscillations

• Published in: Chinese Science Bulletin
• Main Authors: Qian WeiHong, Liang HaoYuan
• Other Authors: Qian, WH (reprint author), Peking Univ, Sch Phys, Dept Atmospher & Ocean Sci, Beijing 100871, Peoples R China., Peking Univ, Sch Phys, Dept Atmospher & Ocean Sci, Beijing 100871, Peoples R China.
• Format: Journal/Newspaper
• Language: English
• Published: 科学通报 英文版 2012
• Subjects: physical decomposition; El Nino-Southern Oscillation; Arctic Oscillation; Antarctic Oscillation; planetary scale; intra-seasonal oscillations; TEMPERATURE; CIRCULATION; PACIFIC; Antarctic; Arctic; Pacific; The Antarctic; Antarc*
• Online Access: https://hdl.handle.net/20.500.11897/148402; https://doi.org/10.1007/s11434-012-5168-1

Global atmospheric variables can be physically decomposed into four components: (1) the zonal time averaged climate symmetric component, (2) the time averaged climate asymmetric, (3) the zonal-mean transient symmetric anomaly, and (4) the transient asymmetric anomaly. This study analyzes the relationships between the intra-seasonal and inter-annual variability of planetary scale decomposed zonal and meridional winds in the tropopause, and oscillations such as those from the El Nino-Southern Oscillation (ENSO), the Arctic Oscillation (AO) and the Antarctic Oscillation (AAO). The tropical inter-annual zonal mean wind anomalies in the tropopause are linked with the ENSO cycle and can propagate into the subtropics, mid-latitudes, and polar front regions via abnormal meridional vertical cells. Similarly, tropical intra-seasonal (40-60-d) zonal wind anomalies can reach the subtropics and mid-latitudes. The polar intra-seasonal zonal wind anomalies in the tropopause can propagate toward high-latitude areas. Thus, the AO and the AAO are the result of the interaction and propagation of these planetary scale zonal wind anomalies. http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000305916000015&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 Multidisciplinary Sciences SCI(E) 6 ARTICLE 20 2606-2614 57