Method for correcting forecast wind speed of site

A wind speed correction and station technology, which is applied in the direction of measuring devices, meteorology, and the use of multiple variables to indicate weather conditions, etc., can solve the problems of large wind speed forecast errors and poor consideration of the ambient temperature, air pressure, and humidity of weather stations. Achieve the effects of reducing wind speed error, accurate wind speed forecast results, and improving wind speed accuracy

Inactive Publication Date: 2019-02-19
浙江省气象科学研究所 +1
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Problems solved by technology

[0002] The wind speed forecast is mainly based on grid-based numerical weather forecast, while the wind speed forecast at the station is interpolated to the site through the grid forecast, which does not take into account the ambient temperature, air pressure, humidity and other influencing factors near the meteorological station, resulting in the current The forecast wind speed error of automatic weather stations is relatively large

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  • Method for correcting forecast wind speed of site
  • Method for correcting forecast wind speed of site

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[0015] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0016] refer to figure 1 Shown, the present invention provides a kind of site forecast wind speed correction method, comprises the following steps:

[0017] Step 1, start reporting time t 0 The forecast data and monitoring data of the previous few days are taken as samples, and the meteorological station is i Forecast data for : 2m temperature, surface pressure, 2m humidity, 10m zonal wind and 10m radial wind as independent variables x m (m=1,2,3,4,5), put the meteorological station at the forecast time t i The monitoring data: air temperature, local air pressure, relative humidity and 2-minute average wind speed are used as the dependent variables of the corresponding forecast data y p (p=1,2,3,4), establish the statistical equation of the dependent variable and the corresponding independent variable: y p =∑b m,t x m,t +ε p ;...

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Abstract

The invention provides a method for correcting a forecast wind speed of a site. The method comprises the following steps: Step 1, setting an independent variable xm and a dependent variable yp, establishing a statistical equation: yp=[sigma]bm, txm, t+[epsilon]p; Step 2, extracting a first component [mu]1 of the independent variable in a set X of the independent variable xm, establishing a regression equation: X=B1[mu]1, Y=B1[mu]1, and stopping calculation if the regression equation passes through cross validation, otherwise performing Step 3; Step 3, performing a second component extraction on residual information eX after X is interpreted by [mu]1 to obtain a second regression equation: X=B1[mu]1+B2[mu]2, Y=B1[mu]1+B2[mu]2, and stopping calculation if the regression equation passes through the cross validation, otherwise performing a next extraction until passing through the cross-validation; and Step 4, obtaining a final regression equation of Y (as shown in the specification), andcorrecting the forecast wind speed at time t0 with the regression equation. According to the method for correcting the forecast wind speed of the site, more accurate wind speed forecast results can beprovided for the automatic meteorological site.

Description

technical field [0001] The invention relates to a meteorological data processing method, in particular to a station forecast wind speed correction method. Background technique [0002] The wind speed forecast is mainly based on grid-based numerical weather forecast, while the wind speed forecast at the station is interpolated to the site through the grid forecast, which does not take into account the ambient temperature, air pressure, humidity and other influencing factors near the meteorological station, resulting in the current The wind speed forecast errors of automatic weather stations are relatively large. Contents of the invention [0003] The purpose of the present invention is to provide a kind of station forecast wind speed correction method, to reduce station forecast wind speed error, provide more accurate wind speed forecast result for automatic meteorological station. [0004] In order to achieve the above object, the present invention adopts following techni...

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Application Information

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IPC IPC(8): G01W1/02
CPCG01W1/02Y02A90/10
Inventor 杨程姜瑜君姜文东刘岩
Owner 浙江省气象科学研究所
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