Unbalanced Low-Level Jet and Solenoidal Circulation Associated with

Abstract

A southerly low-level jet appeared over Kyushu on July 7, 1970 when a large amount of precipitation was observed to the west of jet axis. The mesoscale thermal structure around the jet core shows an indirect indication of adjustment with the wind field but it is found to be highly unbalanced. The warmer area appearing below the jet core to the east is characterized by dryness, which is possibly generated by an indirect solenoidal circulation.
Similar relationship among wind, temperature and relative humidity field is found in the lower troposphere even for the monthly mean values of June 1970.