巨爵颱風~2015/10/16 - 颱風討論

By Agnes
at 2015-10-16T10:28
at 2015-10-16T10:28
Table of Contents
經過這兩天的整理,巨爵颱風的結構已經從原本的高低層分離逐漸趨於垂直整合,
由多頻微波掃描的資料來看,巨爵的中心已經慢慢來到強對流區域的中心,
而且周圍的對流雨帶有開始組織對稱化的趨勢,
加上未來的路徑即將再度經過一個高OHC的區域,垂直風切偏弱,
高層輻散狀的雲型也逐漸出現,高空輻散正在加強,
整體來看似乎正在進入強度加強,甚至快速加強階段的徵兆,
未來這24~36小時內的強度變化值得密切觀察注意。
http://i.imgur.com/vxsnGzZ.jpg
路徑方面,目前巨爵仍是位於太平洋高壓脊南側的引導,
不過華北正有西風短波槽東移,高壓脊即將在台灣附近斷裂,
因此巨爵颱風周末靠近呂宋島後將會失去引導的力量而減速,
預估明天周六減速的狀況會比較明顯開始發生,
預估周日到下周一這兩天(18~19日)颱風會先通過呂宋島附近區域,
像巨爵這麼大一個渦漩遇到地形應該會自己試著繞過去或翻過去,
至於會以什麼樣的路徑型式經過呂宋島地形是很值得觀察的重點,
電腦模式也很難抓準(應該說很分歧),實際的追蹤觀察會比較有用。
下周二(20日)之後颱風應該會開始進入北轉的階段,
這時候巨爵颱風的位置以及北轉路徑的角度跟速度都很重要,
會連動影響到後面至少3天(21~23日)台灣的天氣如何,
目前的資料看起來還是不明朗,所以請大家繼續觀察,保持留意。
最近系集預報圖很紅(?),不過這種天女散花狀的圖該怎麼看?
http://i.imgur.com/ZpLErah.png
簡單來說,這麼多條線是針對初始場做各種不同的簡單微調設定後所跑出來的結果,
以這張圖來說,這是ECMWF(歐洲中期模式)做了50種調整後所跑出的50條路徑,
每一條都有些差異,隨著預報時間越後期,路徑之間分散程度越大,
以這張圖來看,巨爵在3天之後的路徑預測可以說是分常分散的,
不過利用電腦的計算還是可以從這50條路徑做總合分析去求出一個"系集平均路徑",
也就是圖中深藍色的那一條,
另外還有一條"決定性預報路徑",
這是以校驗分析後所得到最好的初始場設定條件所跑出來的一條預測路徑
(這張圖中未標示),
通常這兩條路徑若是很一致,表示可預報度較高,預報路徑準確度的信心也較高,
目前巨爵颱風的這兩條路徑的分歧度較大,表示可預報度低,特別是72小時之後,
因此一切還是處於觀察的階段,未來還需要繼續觀察預報結果的變化,
以及實際大氣狀況的轉變來調整颱風以及天氣的預測狀態,目前尚不宜多做猜測跟斷言。
周末期間台灣北部、東半部的天氣應該會逐漸受到颱風外圍環流的影響,
東北風也會隨著氣壓梯度加大而跟著加強,迎風面的水氣增多,
下雨的狀況漸趨明顯,特別是周日(18日)開始,另外就是台灣附近的風會變大,
海邊的浪也將顯著變強,有安排活動的朋友都要特別注意了。
以上先簡單供參考~
--
由多頻微波掃描的資料來看,巨爵的中心已經慢慢來到強對流區域的中心,
而且周圍的對流雨帶有開始組織對稱化的趨勢,
加上未來的路徑即將再度經過一個高OHC的區域,垂直風切偏弱,
高層輻散狀的雲型也逐漸出現,高空輻散正在加強,
整體來看似乎正在進入強度加強,甚至快速加強階段的徵兆,
未來這24~36小時內的強度變化值得密切觀察注意。
http://i.imgur.com/vxsnGzZ.jpg

路徑方面,目前巨爵仍是位於太平洋高壓脊南側的引導,
不過華北正有西風短波槽東移,高壓脊即將在台灣附近斷裂,
因此巨爵颱風周末靠近呂宋島後將會失去引導的力量而減速,
預估明天周六減速的狀況會比較明顯開始發生,
預估周日到下周一這兩天(18~19日)颱風會先通過呂宋島附近區域,
像巨爵這麼大一個渦漩遇到地形應該會自己試著繞過去或翻過去,
至於會以什麼樣的路徑型式經過呂宋島地形是很值得觀察的重點,
電腦模式也很難抓準(應該說很分歧),實際的追蹤觀察會比較有用。
下周二(20日)之後颱風應該會開始進入北轉的階段,
這時候巨爵颱風的位置以及北轉路徑的角度跟速度都很重要,
會連動影響到後面至少3天(21~23日)台灣的天氣如何,
目前的資料看起來還是不明朗,所以請大家繼續觀察,保持留意。
最近系集預報圖很紅(?),不過這種天女散花狀的圖該怎麼看?
http://i.imgur.com/ZpLErah.png

簡單來說,這麼多條線是針對初始場做各種不同的簡單微調設定後所跑出來的結果,
以這張圖來說,這是ECMWF(歐洲中期模式)做了50種調整後所跑出的50條路徑,
每一條都有些差異,隨著預報時間越後期,路徑之間分散程度越大,
以這張圖來看,巨爵在3天之後的路徑預測可以說是分常分散的,
不過利用電腦的計算還是可以從這50條路徑做總合分析去求出一個"系集平均路徑",
也就是圖中深藍色的那一條,
另外還有一條"決定性預報路徑",
這是以校驗分析後所得到最好的初始場設定條件所跑出來的一條預測路徑
(這張圖中未標示),
通常這兩條路徑若是很一致,表示可預報度較高,預報路徑準確度的信心也較高,
目前巨爵颱風的這兩條路徑的分歧度較大,表示可預報度低,特別是72小時之後,
因此一切還是處於觀察的階段,未來還需要繼續觀察預報結果的變化,
以及實際大氣狀況的轉變來調整颱風以及天氣的預測狀態,目前尚不宜多做猜測跟斷言。
周末期間台灣北部、東半部的天氣應該會逐漸受到颱風外圍環流的影響,
東北風也會隨著氣壓梯度加大而跟著加強,迎風面的水氣增多,
下雨的狀況漸趨明顯,特別是周日(18日)開始,另外就是台灣附近的風會變大,
海邊的浪也將顯著變強,有安排活動的朋友都要特別注意了。
以上先簡單供參考~
--
Tags:
颱風
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