subsidence zone meaning in English

沉降带
沉陷带

Generally under 300hpa the subsidence zone of the potential vorticity lies above cyclone at the violent stage of the development of the cyclone , however , the center of cyclone still lies near the potential vorticity of large value above 300hpa
气旋强烈发展期，一般300hpa以下，位涡的下沉区在气旋的上空， 300hpa以上气旋中心仍位于大值位涡后部。
It contributes to the development of the cyclone when the center of the potential vorticity is behind the cyclone at initial stages of the development of the cyclone and there is a manifest inverted conical subsidence zone under the 200hpa , which lies in the rear of cyclone
气旋的发展初期，位涡中心位于气旋的后部， 200hpa以下有明显的倒圆锥形下沉区，该下沉区位于气旋的后部。这种形势有利于气旋上空的位涡增长。
Taking the typical cities in subsidence zone in yangtze river delta as an example , the concrete identification method of disaster causal critical water table of land subsidence is brought forward according to the monitoring data of land subsidence and the critical water table is identified
以长江三角洲地面沉降区代表城市为例，给出了根据已发生地面沉降灾害城市的地面沉降监测数据确定地面沉降成灾临界水位的具体方法，并确定了该地区地面沉降成灾临界水位。