可能还是不可能?飓风穿越赤道,地球科学堆栈交换江南电子竞技平台江南体育网页版 最近30从www.hoelymoley.com 2023 - 07 - 06 - t23:31:16z //www.hoelymoley.com/feeds/question/239 https://creativecommons.org/licenses/by-sa/4.0/rdf //www.hoelymoley.com/q/239 89年 可能还是不可能?飓风穿越赤道 DrewP84 //www.hoelymoley.com/users/38 2014 - 04 - 17 - t00:18:11z 2019 - 08年- 08 - t09:10:03z < p >没有已知的飓风越过赤道。飓风通常需要开发和科里奥利力形式至少5°远离赤道由于科里奥利力是零。< / p > < p >是地球物理学和热带系统这样是不可能跨越赤道后形成飓风,或工作在此发生的力量如此强大,赤道穿越飓风是一个极其罕见的事件我们可能不会见证1000年+年?< / p > < p > < a href = " https://i.stack.imgur.com/cECCC.png " > < img src = " https://i.stack.imgur.com/cECCC.png " alt = "追踪和强度的热带风暴" > < / > < / p > //www.hoelymoley.com/questions/239/-/285 # 285 70年 凯西回答的可能还是不可能?飓风穿越赤道 凯西 //www.hoelymoley.com/users/64 2014 - 04 - 17 - t15:09:38z 2016 - 03 - 29 - t13:44:04z < p >不可能。< / p > < p >众所周知,科里奥利力是需要形成一个飓风,和图5 <一口> o < /一口> N / S的最低形成广泛宣传。你还可以找到附近的热带风暴形成的记录印度南至1.4 <一口> o < /一口> N。< / p > < p >穿越赤道的问题不是一个飓风的形成,这是飓风运动之一。最初由于科里奥利,飓风移动平行于赤道将开始获得向极运动组件,因此移动远离赤道。但是,因为这是由于科里奥利,如果你能得到一个风暴足够接近赤道,这种效果不会那么强。这将是一个几乎不可能的,但我不愿意叫它是不可能的。长时间我们都没有卫星,我们能说的是,它还没有发生以来我们一直看。< / p > < p >如果风暴确实穿过赤道,它会做什么?没有,但它进一步深入相反的半球,科里奥利会了抵御风暴的准备工作,将自旋下来,变得杂乱无章,不再是一个飓风,可能成为一个遗迹低。

A tropical disturbance has crossed the equator. One such disturbance occurred June 27, 2008 in the Atlantic basin (south to north) that retained its clockwise motion for some time:

animated satellite loop

//www.hoelymoley.com/questions/239/-/10613 # 10613 7 杰克Denur回答的可能还是不可能?飓风穿越赤道 杰克Denur //www.hoelymoley.com/users/8382 2017 - 06 - 18岁t09:00:32z 2017 - 12 - 07 - t07:42:11z < p >科里奥利效应形成的必要条件,但不是为了维护一个热带气旋。< / p > < p >一旦形成,在一个成熟的热带气旋强度飓风风平衡旋转,压力梯度和离心力,科里奥利效应相比可以忽略不计。< / p > < p >尤其如此,如果热带气旋虽小,但是激烈。这样一个成熟的热带气旋强度飓风不会遇到困难如果越过赤道。< / p > < p >其发行量将归类为气压前穿越赤道,后来反压。这样一个成熟的热带气旋强度飓风不会削弱跨越赤道后由于逆转科里奥利效应(虽然它可能会削弱或加强由于其他原因)。< / p > < p >反压旋风是完全符合运动定律。除了最小的尺度,如尘暴或漩涡很难启动,但一旦启动就可以稳定。< / p > < p >跨越赤道热带气旋可能只有这样,天气尺度可以发起反压旋风。如果一个热带气旋,尤其是一个大,横跨赤道,达到明显的纬度相反的半球,说外热带或更低的中纬度地区,然后梯度风近似而不是旋转风近似适用。

But antibaric gradient wind is still a stable flow. See for example James R. Holton and Gregory J. Hakim, Dynamic Meteorology Fifth Edition Section 3.2.5 on pp. 74-77.

In baric gradient flow the Coriolis and centrifugal forces acting outwards balance the pressure-gradient force acting inwards.

In antibaric flow the centrifugal force acting outwards balances the pressure gradient and Coriolis forces acting inwards.

Thus for a given pressure gradient and radius of curvature of the isobars, the centrifugal force must be stronger, and hence the wind speed higher, for an antibaric tropical cyclone than for a baric one.

This does not mean that a tropical cyclone must intensify if it crosses the equator. Whether baric or anitbaric, its intensity is determined by the available energy or exergy corresponding to the sea-surface and tropopause temperatures (with possible deductions for wind shear, entrainment of dry air, land interaction, etc.)

The First and Second Laws of Thermodynamics require that the pressure gradient and radius of curvature of the isobars must adjust to the exergy supply --- not vice versa.

According to Holton and Hakim, an antibaric (synoptic-scale) hurricane can easily exist if it is centered say only a few degrees from the Equator in the opposite hemisphere, but this becomes more and more difficult and hence more and more unlikely with increasing latitude in the opposite hemisphere.

Whether at some latitude in the opposite hemisphere it becomes absolutely impossible may be an open question.

Small-scale antibaric cyclones (dust devils, whirlpools, waterspouts, and to a lesser extent tornadoes) can easily exist at any any latitude where sufficient exergy exists to generate and maintain them.

//www.hoelymoley.com/questions/239/-/17692 # 17692 1 回答1 V H Luthman不可能还是不可能?飓风穿越赤道 Jan V H Luthman //www.hoelymoley.com/users/17595 2019 - 08年- 08 - t09:10:03z 2019 - 08年- 08 - t09:10:03z < p >这是一个归档NASA地球天文台网站上发表评论,对在100 - 400年估计一次赤道热带风暴,台风Varmei 2001年12月。< / p > < p > < a href = " https://earthobservatory.nasa.gov/images/3441/a-rare-cyclone-on-the-equator " rel = " nofollow noreferrer " > https://earthobservatory.nasa.gov/images/3441/a-rare-cyclone-on-the-equator < / > < / p >
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