A Prediction Method of Urban Heat Island Effect

Abstract

The invention discloses a method for forecasting urban heat island effect. The method includes the steps of performing temperature inversion for remote sensing image data using a single window algorithm to obtain urban surface temperature data; grading the urban surface temperature data according to mean parameters and standard deviation parameters; conducting statistics of heat island area data of different grades; and calculating an initial state matrix S(0) based on the heat island region data of different grades at the first moment, calculating a transition matrix P based on the heat island region data of different grades at the second moment and the initial state matrix S(0), and calculating the evolution state data of heat island regions in the subsequent required time based on the initial state matrix S(0) and the transition matrix P. The invention constructs the state transition matrix and the initial state matrix by utilizing the temperature inversion grading results, and forecasts the next evolution trend of the heat island based on Markov chain transition probabilities. The invention is high in forecasting accuracy and has a great practical significance.

Description

technical field [0001] The invention relates to a remote sensing data processing method, in particular to a method for predicting urban heat island effect. Background technique [0002] The heat island effect means that when a city develops to a certain scale, due to changes in the nature of the underlying surface of the city, air pollution, and artificial waste heat emissions, the temperature in the city is significantly higher than that in the suburbs, forming a phenomenon similar to a high-temperature island. The underlying surface refers to the earth's surface in direct contact with the lower atmosphere, which includes topography, geology, soil, rivers and vegetation, etc., and is one of the important factors affecting climate. Since the heat island effect was recorded in writing, many scientists have observed many large and small cities around the world. According to statistics, by 2012, there were more than 1,000 cities of different sizes in the world. Throughout the ...

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Problems solved by technology

The advantage of the conventional method is that the description and revelation of the urban heat island effect is simple and concise, but it is basically a point-scale or purely conceptual research, and it is difficult to extend it to the surface in a real and effective way. Therefore, it is very important for the research There are great difficulties in the flat layout and internal structure of urban heat islands

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