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Climate change prediction method and system for fitting various climate modes based on modified BP neural network

A BP neural network, climate change technology, applied in biological neural network models, climate change adaptation, neural learning methods, etc., can solve problems such as large deviation, inability to extend forecast sequence values, and inability to correctly reflect the temporal and spatial distribution of climate change, etc. Achieve the effect of improving input and output data processing and increasing reliability

Active Publication Date: 2016-07-06
HOHAI UNIV
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Problems solved by technology

However, when a single model evaluates the climate change trend of a specific watershed, there is often a large deviation; when using a multi-model set, using the same set of weight values ​​for a watershed does not take into account the spatial inhomogeneity of the watershed, and cannot correctly reflect the temporal and spatial distribution of climate change.
[0004] In addition, when BP neural network is used for forecasting, the forecast sequence value cannot be extended, which limits the application of BP neural network in climate prediction

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  • Climate change prediction method and system for fitting various climate modes based on modified BP neural network
  • Climate change prediction method and system for fitting various climate modes based on modified BP neural network
  • Climate change prediction method and system for fitting various climate modes based on modified BP neural network

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[0066] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without one or more of these details. In other instances, some technical features known in the art have not been described in order to avoid obscuring the present invention.

[0067] The applicant believes that the use of climate models to predict climate change is essentially the use of simulated data and measured data of climate models to conduct control experiments, and to select climate models or sets of climate models with good evaluation effects for future climate prediction. The study found that the existing climate model forecasting future climate change plans using a single model or a weighted multi-model ensemble method to predict future trends will have problems such as large deviations and no consideration of spatial...

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Abstract

The present invention discloses a climate change prediction method and system for fitting various climate modes based on a modified BP neural network. The method comprises the following steps: collecting rainfall data that characterizes a climate change feature; performing downscaling processing on climate mode prediction grid data, so as to obtain a long series of data with the same resolution as measured data; performing average correction on a downscaled climate mode prediction series; establishing a modified BP neural network model and determining a network model structure; training and inspecting the established BP neural network model; and predicting a future climate spatial-temporal change using a model output. According to the method and system disclosed by the present invention, output / input data processing of the BP neural network is modified, and various climate modes are fit to predict the future climate change, so that reliability of the prediction result is increased, and the defects that the deviation of a single mode is relatively large during an assessment and that basin space nonuniformity is not considered during a multi-mode collection assessment and the like are made up.

Description

technical field [0001] The invention belongs to the application field of climatology and hydrology and water resources, in particular to a method for predicting future climate change by using a climate model. Background technique [0002] Future climate projection in the context of climate change is one of the major scientific issues of global climate change. Objectively evaluating the future climate change trend, strengthening the adaptive management of water resources, seeking benefits and avoiding disadvantages are the major strategic needs of the country to deal with climate change. Global climate models are considered to be the primary tools for understanding and attributing past climate change and making projections for the future. Therefore, it is very important to choose a model with high performance. Whether the model can reasonably simulate the past climate change will directly affect whether the model can evaluate the "reproducibility" of the current climate deca...

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Application Information

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IPC IPC(8): G06Q10/04G06Q50/26G06N3/08
CPCG06N3/08G06Q10/04G06Q50/26Y02A10/40Y02A90/10
Inventor 钟平安吴业楠朱非林徐斌李天成付吉斯
Owner HOHAI UNIV
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