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Short temporary rainfall forecasting method and device

A short-term and data-based technology, applied in the field of short-term precipitation forecasting methods and devices, can solve the problems of large flow field error, complex radar echo transformation, and inability to estimate the flow field at the forecast time, so as to reduce the false alarm rate and improve the hit rate effect

Active Publication Date: 2018-09-14
青岛心中有数科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the complex transformation of radar echoes at adjacent moments, for example: the echo motion is non-rigid deformation motion, there are echoes that appear suddenly or dissipate, etc., the problem of observing echoes causes large errors in the flow field calculated by the traditional optical flow method
Due to the inherent defects of the optical flow method, the traditional optical flow method cannot estimate the flow field in areas without radar echoes, nor can it estimate the flow field at the forecast time

Method used

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  • Short temporary rainfall forecasting method and device

Examples

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Effect test

Embodiment 1

[0032] Such as figure 1 As shown, it is a flow chart of a short-imminent precipitation forecasting method provided by an embodiment of the present invention, consisting of figure 1 It can be seen that the steps of the short-imminent precipitation forecasting method include:

[0033] Step S101: Obtain combined reflectivity factor data at time T and non-divergence laminar flow field data at time T+t.

[0034] Here, combined reflectivity factor (dBZ) data can be obtained from weather radar measurements, and non-divergence laminar flow field data can be obtained from numerical weather prediction methods. Among them, weather radar is a kind of meteorological radar, and it is the main tool for monitoring and early warning of strong convective weather. Detect the spatial distribution and vertical structure of precipitation, and use this as an alert to track the precipitation system. Numerical weather prediction (numerical weather prediction) refers to solving the equations of flui...

Embodiment 2

[0052] The embodiment of the present invention also provides a short-term precipitation forecasting device, such as image 3 As shown, it is a schematic structural diagram of a short-imminent precipitation forecasting device provided by an embodiment of the present invention. image 3 It can be seen that the short-imminent precipitation forecasting device includes a data acquisition module 31 , an interpolation module 32 and an extrapolation module 33 connected in sequence. Among them, the functions of each module are as follows:

[0053] The data acquisition module 31 is configured to acquire combined reflectivity factor data at time T and non-divergence laminar flow field data at time T+t.

[0054] The interpolation module 32 is configured to interpolate the non-divergence layer flow field data into the two-dimensional grid points of the combined reflectivity factor data to obtain interpolated flow field data.

[0055] The extrapolation module 33 is configured to extrapola...

Embodiment 3

[0059] see Figure 5 , the embodiment of the present invention also provides a short-imminent precipitation forecasting device, including: a processor 50, a memory 51, a bus 52 and a communication interface 53, the processor 50, the communication interface 53 and the memory 51 are connected through the bus 52; Executable modules, such as computer programs, stored in the execution memory 51 .

[0060] Wherein, the memory 51 may include a high-speed random access memory (RAM, Random Access Memory), and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory. The communication connection between the system network element and at least one other network element is realized through at least one communication interface 53 (which may be wired or wireless), and the Internet, wide area network, local network, metropolitan area network, etc. can be used.

[0061] The bus 52 can be an ISA bus, a PCI bus or an EISA bus, etc. The bus can be divided ...

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Abstract

The invention provides a short temporary rainfall forecasting method and device, and relates to the technical field of meteorologic weather forecast. The short temporary rainfall forecasting method comprises the following steps: obtaining combined reflectivity factor data at T moment and non-divergent level flow field data within T+t; interpolating the non-divergent level streamline flow data intoa combined reflectivity factor coordinate system to obtain interpolation flow field data; and obtaining weather radar reflectivity factor data within T+t according to the extrapolation of the interpolation flow field data and the combined reflectivity factor data. According to the short temporary rainfall forecasting method and device provided by the embodiment of the invention, the rainfall forecasting hit rate can be improved, and the false alarm rate is reduced.

Description

technical field [0001] The invention relates to the technical field of meteorological weather forecasting, in particular to a short-imminent precipitation forecasting method and device. Background technique [0002] Short-term weather forecast refers to the weather forecast for 0-3 hours, especially the precipitation forecast for 0-3 hours. There are currently two objective methods for short-term precipitation forecasting: [0003] The first is the numerical weather model forecasting method. Although the resolution and accuracy of the current numerical weather prediction models are already very high, especially the accuracy of the medium and short-term flow field and situation field predicted by the numerical weather prediction The short-term precipitation forecast by the numerical weather model has a large error. [0004] The second is the weather radar echo map extrapolation method. Weather radar is the main tool for monitoring severe convective weather and estimating ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/95G01S7/41
CPCG01S7/418G01S13/958Y02A90/10
Inventor 甄二丽李方星刘光胜
Owner 青岛心中有数科技有限公司
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