天氣小觀:模式下週1040百帕以上蒙古冷高壓 - 颱風討論
By Jessica
at 2022-09-29T17:24
at 2022-09-29T17:24
Table of Contents
天氣小觀:模式下週1040百帕以上蒙古冷高壓
時序來到九月底,冬季系統威力已經到了不容小覷的情勢,
今年的冬季系統入秋後攻勢偏猛,
模式預報未來一週1040百帕以上的蒙古冷高壓出現,
下週東亞第一波冷氣團出現,有趣的是
1. 華北降至10度上下
2. 華中降至15度以下
3. 華南到台灣卻20度有撐,南嶺以南沿岸甚至不受影響還有25度
可見太平洋高壓守住南嶺以南到台灣高空場。
事實上,這波強大的攻勢主要是由中亞西風帶阻塞高壓開始崩潰後,
北大西洋暖脊又適時入侵北極,讓北極渦旋中心偏向西伯利亞,
於是大量的冷氣團衝向中亞,但在九月底的南方,
高空還有南亞高壓勢力能阻擋,
於是,地面冷空氣/冷氣團向南衝至華南時,高空缺乏西風槽偏北氣流沉降支援,
導致地面冷空氣/冷氣團厚度不夠,受地形阻擋卡在南嶺以北。
對台灣來說,冷空氣走海路,雖不受地形影響,
但暖海面影響下增溫變性更明顯,
因此,
下週三以後氣溫一整個涼爽,北部東北部則濕濕涼涼了。
目前看來,不是冬將軍,不是秋老虎,真的是難得的秋天感。
在文學之秋的時節,
文人總以為,
春夏秋冬的雨,還是秋雨別有一番滋味,是愁緒,懷念,迷惘,絲絲縈繞在心頭。
(簡單說說囉)
--
時序來到九月底,冬季系統威力已經到了不容小覷的情勢,
今年的冬季系統入秋後攻勢偏猛,
模式預報未來一週1040百帕以上的蒙古冷高壓出現,
下週東亞第一波冷氣團出現,有趣的是
1. 華北降至10度上下
2. 華中降至15度以下
3. 華南到台灣卻20度有撐,南嶺以南沿岸甚至不受影響還有25度
可見太平洋高壓守住南嶺以南到台灣高空場。
事實上,這波強大的攻勢主要是由中亞西風帶阻塞高壓開始崩潰後,
北大西洋暖脊又適時入侵北極,讓北極渦旋中心偏向西伯利亞,
於是大量的冷氣團衝向中亞,但在九月底的南方,
高空還有南亞高壓勢力能阻擋,
於是,地面冷空氣/冷氣團向南衝至華南時,高空缺乏西風槽偏北氣流沉降支援,
導致地面冷空氣/冷氣團厚度不夠,受地形阻擋卡在南嶺以北。
對台灣來說,冷空氣走海路,雖不受地形影響,
但暖海面影響下增溫變性更明顯,
因此,
下週三以後氣溫一整個涼爽,北部東北部則濕濕涼涼了。
目前看來,不是冬將軍,不是秋老虎,真的是難得的秋天感。
在文學之秋的時節,
文人總以為,
春夏秋冬的雨,還是秋雨別有一番滋味,是愁緒,懷念,迷惘,絲絲縈繞在心頭。
(簡單說說囉)
--
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