题目内容

【题目】读“北半球某区域冬季某月地面天气形势图（单位:百帕）”，完成下列问题

（1）此时，A地受 气压控制,其天气状况是 。

（2）图中a、b、c、d中风向表示正确的是 地；关于甲乙两地叙述正确的是（ ）

A．甲处风力大于乙处 B．甲处气压高于乙处

C．乙处目前受冷气团控制 D．未来几天乙地会经历一次升温过程

（3）近日，将有 从①地过境。④地在锋面过境后，天气变化情况是 、 、 。

（4）暖空气在锋面上常有大规模的 （上升、下降）运动。在②④两地的暖空气中,被迫抬升的是 地。

【答案】（1）低 阴雨天气

（2）c A

（3）暖锋 气温下降、 气压上升、 天气转晴

（4）上升 ④

【解析】

试题分析：（1）从图中看A地气压较四周低，受低气压控制，低压控制下多阴雨天气。

（2）风向应从高压指向低压，a、d指向高压错；北半球风向向右偏，b风向较水平气压梯度力向左偏，错，c风向正确。甲地等压线较乙处密，风力大于乙处，A正确；甲处气压值是1005~1010之间，乙气压是1010~1015之间，乙的气压高于甲，B错；乙处位于暖锋锋后，冷锋锋前，暖气团控制，C正确；未来几天冷锋到达乙地，乙会经历一次冷锋过境过程，大风、降温、雨雪天气，D错。

（3）①地位于暖锋锋前，近日将有暖锋从①地过境。④位于冷锋锋前，将经有冷锋过境，冷锋过境后，气温下降，气压上升、天气转晴。

（4）暖空气在锋面上常有大规模的上升运动，②是暖锋，暖气团主动爬升，④是冷锋，冷气团主动向暖气团移动，暖气团被迫抬升。

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