Re: [討論] 對Sepat雙眼牆的見解(From國外學者)

[IanLi (IanLi)]

※ 引述《ryanlin311 (ryan)》之銘言：
: 國外也注意到聖帕持續很長一段的雙眼牆觀測
: 以下是NRL(Naval Research Laboratory, Monterey, USA)
: 的一些看法,其中聖帕內眼牆是否完全崩潰,在強度上可能也些
: 有不同的變化.其中Katrina就是很好的例子
: ----------------------------------------------------------------------
: Sepat provides another stunning example of the quandary facing the TC
: warning community.
面對熱帶氣旋警報上，有關令人困惑的現象，Sepat提供了另一個漂亮的例子
: 1. Double eyewalls create a secondary wind max, potentially at a much
: larger radius than the original single eyewall.
在雙眼牆結構上，在風力分布上有另一個強風區，可能在原來的眼牆外
有另一個半徑更大眼牆
: 2. If the inner eye collapses, the radius of max winds makes a step jump
: to a much larger radius.
若內眼牆崩潰，強風區的分布半徑會跳躍到外眼牆上
: 3. Even if the inner eye does not collapse, it typically becomes much
: weaker.
即使內眼牆沒崩潰，也會趨於減弱
:   In both scenarios, the secondary eyewall and its associated high winds
: present a radically expanded wind field for those in its path during
: landfall. Coastal warnings, preparations and the expectations of all
: folks in the landfall region must realize that max winds will NOT be
: contained within the "typical" small inner core that encompasses 10s of
: km, but now can be multiple times larger in size.
在這兩個案例中，外眼牆和伴隨的環狀風場在登錄過程中，會讓警報和登陸地區的
民眾會發現到，最強的風力並不是環繞在數十公里大的內眼牆上，而是原先預期數
倍大
: Hurricane Katrina is the classic case, since it was in double eyewall
: mode at landfall and did NOT collapse the inner eye AND shrink the 2nd
: eyewall back to replace the inner eye prior to landfall.
颶風Katrina是一精典例子，在登陸時，內眼牆並沒崩潰且外眼牆也沒收縮而取代原
先的眼牆
: Thus, not only are we faced with the usual landfall timing and max
: intensity dilemmas, our need has now advanced to "what eyewall cycle
: stage will the storm be in at landfall"?  This presents fascinating
: opportunities for research efforts on multiple fronts.
因此，不只我們要面對登陸的時機和強度的難題，並要思考在登陸時眼牆的結構
是哪樣？這議題是個迷人的機會去研究相關效應
: Best wishes to our friends in Taiwan.

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推 ipspro:氣象局圖很像在畫太極 雙P眼可怕
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XD手滑了 按錯了
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→ seeback:接觸陸地造成眼牆崩潰？
※ 編輯: IanLi           來自: 140.115.205.209      (08/18 02:36)