Time predicting method when typhoon front reaches earth surface

A technology for forecasting the earth's surface and time. It is used in weather forecasting, measuring devices, meteorology, etc. It can solve problems such as lack of mature experience, and achieve the effect of protecting life and property, protecting engineering safety, and being easy to achieve.

Inactive Publication Date: 2010-07-14
HOHAI UNIV
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  • Time predicting method when typhoon front reaches earth surface
  • Time predicting method when typhoon front reaches earth surface

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[0013] In the meteorological survey, the initial data of the spatial distribution of atmospheric density in the atmosphere (medium-scale space) was obtained through satellite remote sensing, image processing, and on-site measurements, and the heavier gas density ρ on the interface side under the initial interface condition of the typhoon was measured 1 (I.e. the initial density of typhoon formation) and its thickness h 1 And the lighter gas density ρ on the other side of the interface 2 (That is, the density of the atmosphere when a typhoon is not formed), the first peak time T of the typhoon centroid perturbation (Root meansquare) in the measured data 1 , And its time unit scale is usually measured in days in mesoscale space. Define a finite time unit: day(0). Define the typhoon time scale scalar t with reference to the patent for the measurement method of limited time blasting s1 ,which is:

[0014] t s1 =(h 1 / [2g(ρ 1 -ρ 2 ) / (ρ 1 +ρ 2 )]) 1 / 2 , Where g is the acceleration of gr...

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Abstract

The invention discloses a time predicting method when typhoon front reaches the earth surface, which is characterized by comprising the following steps: 1) measuring the initial density rho1 and the thickness h1 when the typhoon is formed, and the density rho2 of the atmosphere layer on the other side of an interface when the typhoon is not formed; 2), measuring a first peak time T1 of typhoon mass centre disturbance root mean square (namely RMS) in the acquired data; 3), calculating a time scale ts1 of a mesoscale space, wherein ts1=(h1/[2g(rho1-rho2)/(rho1+rho2)])<1/2>; and g is gravity acceleration; and 4), calculating the time Tf when the typhoon front reaches the earth surface, wherein Tf=T1/ts1=Tf/day(0), and day(0) approaches 1. In the time predicting method when the typhoon front reaches the earth surface, the time Tf when the typhoon front reaches the earth surface is calculated by measuring the initial density rho1 and the thickness h1 when the typhoon is formed, and the density rho2 of the atmosphere layer on the other side of the interface when the typhoon is not formed, and the first peak time T1 of the typhoon mass centre disturbance root mean square; and the time predicting method is easy to realize, can predict the time effect when the density of the typhoon is dispersed in a gravity field, and has the great significance of protecting life and property and the engineering safety and the like.

Description

technical field [0001] The invention relates to a method for forecasting the time when a typhoon front reaches the earth's surface, which belongs to the time process related to typhoon vertical mixing in engineering. Background technique [0002] Predicting the time when the typhoon front reaches the earth's surface and predicting the time effect of the typhoon's density spreading in the gravitational field is of great significance in protecting life, property and engineering safety. However, there is no mature experience in this area of ​​research. The application number is 200710019989.0. The invention patent application discloses a measurement method of finite time blasting, which includes the following steps: (1) turning over the stable stratified liquid, and a turbulent mixing process occurs; (2) measuring two characteristic times: the front peak Time T to touch the lower boundary f and centroid perturbation rms first peak time T 1 ; (3) define the scalar t s1 , whi...

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Application Information

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IPC IPC(8): G01W1/10
Inventor 李熙严以新张素香
Owner HOHAI UNIV
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