Sea surface temperature-induced cyclogenesis in the Antarctic circumpolar wave

Abstract

An Antarctic circumpolar wave (ACW) of 3‐ to‐4‐year period propagated eastward around the Southern Ocean in covarying sea surface temperature (SST) and sea level pressure (SLP) anomalies from 1983 through 1992, composed of two wavelengths that circled most of the global ocean along the midlatitude storm track near 40°S. In this ACW, positive SST anomalies drove upward latent heat flux, positive precipitation (PCP), and mid to upper level diabatic heating anomalies in the troposphere, the latter balanced principally by the cooling tendency from deep convection (White and Chen, 2002). One hypothesis has the anomalous PCP and deep convection in this ACW arising from that in more frequent and/or..