地面锋

地面锋附近重力流的产生及其锋生作用

The genesis of gravity current in surface front and its effects on Frontogenesis

冷锋移动较慢时，其冷域远离地面锋的这支顺时针环流主体可被地形完全阻塞在迎风坡。

The clockwise circulation in the cold air can be obstructed wholly in the upward side by orography for the moving slowly steady cold front .

研究结果表明，暴雨天气是在有利的东高西低降水形势下产生的，其主要的触发天气系统是500hPa冷槽、700hPa高原低涡及地面锢囚锋。

The results show that the rainstorm weather was generated under the favorable " high east and low west " rainfall situation . The main triggering weather system is the 500 hPa cold trough , 700 hPa plateau low vortex and ground occluded front .

主要影响系统来自低层切变线、高空低槽和地面静止锋；

The major systems come from the shear line of low-layer , the low trough of upper air and the ground stationary front .

造成6月华南地区强降雨的影响天气系统为切变线和地面静止锋，主要为从东北和西北来的冷空气与暖湿气流交汇于华南地区而形成。

The severe heavy rainfall over South China was caused by the shear line at lower troposphere and stationary front at surface , which was associated with the convergence of cold air from northwestern and northeastern China and warm-wet air from South China Sea .

在弱流场型（R）下，其前一天天气形势是中低层有足够水汽输入条件或存在中尺度低值系统，对应地面存在静止锋或为均压场。

While in the case of Pattern R , there exists sufficient inflow of water vapor or a mesoscale low-pressure system in the lower and middle troposphere , associated with a stationary front or homogeneous distribution of sea surface level pressure .