Abstract
The interannual variability of the east asian upper-tropospheric westerly jet (EAJ) in summer is characterized by the meridional displacement of its axis, or a seesaw pattern of zonal wind anomalie...
Highlights
The interannual variation of the East Asian upper-tropospheric westerly Jet (EAJ) in summer is mainly characterized by a meridional displacement of uppertropospheric zonal wind anomalies (e.g. Lu 2004; Lin and Lu 2005), which significantly affects precipitation and temperature in East Asia (Lau, Kim, and Yang 2000; Wang et al 2013)
Surface air temperature around the Russian Far East arises from the contribution of the northern flank of the EAJ
We focus on the summer interannual variation of the northern flank of the EAJ and investigate its relationship with underlying surface air temperature
Summary
The interannual variation of the East Asian upper-tropospheric westerly Jet (EAJ) in summer is mainly characterized by a meridional displacement of uppertropospheric zonal wind anomalies (e.g. Lu 2004; Lin and Lu 2005), which significantly affects precipitation and temperature in East Asia (Lau, Kim, and Yang 2000; Wang et al 2013). The present study reveals a close relationship between the northern, but not the southern, flank of the EAJ and surface air temperature in the Russian Far The meridional displacement of the EAJ index (EAJI) is defined as the difference in zonal wind anomalies at 200hPa averaged between the northern flank region (40°–50°N, 120°–150°E) and southern flank region (30°–40°N, 120°–150°E) of the EAJ, following Lu (2004) and Lin and Lu (2005).
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