【題目】下圖為“某區(qū)域某季節(jié)季風(fēng)環(huán)流圖”。讀圖回答下列問題。

(1)我國東部地區(qū)季風(fēng)環(huán)流形成的根本原因是 ，該圖反映了北半球 (季節(jié))的季風(fēng)環(huán)流。

(2)該季節(jié)甲處形成了 (高或低)氣壓中心，在其控制下多出現(xiàn) （晴朗、陰雨）天氣。

(3)此季節(jié)，圖中赤道低壓帶處于一年中偏 (南或北)的位置，受該氣壓帶影響，丁地氣候特征為 。

【答案】

(1)海陸熱力性質(zhì)差異 冬季(4分)。(2)高 晴朗(或干冷)(4分)。 (3)南 高溫多雨(4分)。

【解析】

試題分析：

（1）我國位于世界最大大陸-亞歐大陸東部，世界最大大洋-太平洋西岸，海陸熱力性質(zhì)差異顯著，冬季亞歐大陸降溫快，氣溫低，形成高壓，海洋降溫慢，氣溫高，受低壓控制，我國東部地區(qū)盛行西北季風(fēng)。夏季海洋上升溫慢，氣溫低，形成高壓，陸地升溫快，氣溫高，形成低壓，我國東部盛行西南季風(fēng)。圖示季節(jié)我國東部地區(qū)盛行西北季風(fēng)，故為冬季。

（2）讀圖可知，甲位于蒙古-西伯利亞地區(qū)，該地冬季氣溫低，形成高壓中心。高壓中心盛行下沉氣流，天氣晴朗。

（3）氣壓帶風(fēng)帶的位置隨著太陽直射點(diǎn)的移動而移動，就北半球而言，夏季北移，冬季南移。圖示季節(jié)為北半球冬季，氣壓帶風(fēng)帶位置偏南。常年受赤道低氣壓帶控制地區(qū)，盛行上升氣流，多對流雨，緯度低，所以形成全年高溫多雨的氣候特征。

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