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(一) 我国地处西伯利亞干冷气团和太平洋湿暖气团进退交鋒地区,由于太平洋热空气团进退的早晚和西伯利亚冷空气团的强弱变化,再加上我国大部分地区受每年7、8月太平洋西部发生的台风登陆影响,使各地每年的雨季时間和降雨量变差很大。如果太平洋副热帶高气压北进较早,就会形成华南以至江南的旱象,若北进較晚,又会形成华北的早象。降水除在冷
(A) China is located in the Siberian dry-cold air regiment and the Pacific warm air regiment advance and retreat confrontation, due to the advance and retreat of the Pacific hot air regiment and the Siberian cold air regiment changes in strength, coupled with most of China by the July and August Pacific Ocean The typhoon landed in western China affected the annual rainy season time and rainfall greatly. If the Pacific subtropical high will move north earlier, it will form a drought in southern China and even in the south. If the northern advance is too late, the early elephant in northern China will form. Except in the cold precipitation