高空环流 meaning in Chinese

upper air circulation
upper-air circulation

Diagnostic analysis are carried out in the meiyu storm rainfall process from 00ut of 20th july to 00ut of 01st august 1998 in this study . results showed that the patterns in high benifit to this rainfall process
本文首先对98年7月20日00时~ 8月1日00时的梅雨暴雨的环流形势和降水要素进行了实况的诊断分析，结果表明：高空环流形势有利于该段降水。
3 ) the upper air stream circumstances along with strong ssw event mainly was separated to three kinds : the northern advance of aleutian high pressure , the northern advance of north atlantic high pressure , the northern advance of aleutian high pressure and north atlantic high pressure at the same time . their final effect was to make polar region vortex collapse and to increase polar region temperature
3 )伴随强ssw事件的高空环流形势主要有3种：阿留申高压北进，北大西洋高压北进，北大西洋高压和阿留申高压共同北进，它们的最终效果是使极涡崩溃、极区增温。