Based On The Temperature Sensing And Landsat-TM Images Of Urban Thermal Environment In Dalian

With more and more obvious changes in global temperatures,combined with the acceleration of urbanization, people living in the urban environment has been severe impact, as opposed to the suburbs,city heat within the region gathered to form a very significant urban high temperature environments.The concept of urban heat island effect in 1833 for the first time proposed by the British scholar Lake Howard,would then become a prominent urban environment issues.For the city, the urban heat island effect is not only a serious threat to human health, but also lead to poor rural and urban pressure, causing urban and rural air circulation, increasing the city’s air pollution.Therefore,the master and the mechanism of variation of the urban heat island, and for the optimization of human living environment, rational planning of urban development has important practical significance to the study of global and regional climate change also has important theoretical significance. Especially after entering the new century, the global climate has changed dramatically,the rise of the social philosophy of low-carbon life and the process of rapid urbanization with Chinese characteristics, intertwined, no doubt the majority of our urban construction and evolution of the thermal environment had a very profound long-term impact. Remote Sensing of urban space to carry out thermal environment, its meaning is self-evident.This paper studies abroad remote sensing of surface-based temperature inversion, the urban heat island research background, urban heat island research advances and methods through a comprehensive summary. In our modern northeastern coastal city of Dalian, for example, the use of 1960 to 2010 meteorological data for weather temperatures Dalian area were analyzed and compared. Found that nearly 50 years in Dalian With the acceleration of urbanization, the urban heat island effect increased significantly, with temperatures slowly increased year by year. And 1986, respectively, landsat-TM remote sensing phase four in 1995 and 2010 when the data source, through a single window inversion algorithm using its thermal infrared band 6 band ground atmospheric temperature inversion effect.Combining visual interpretation,the heat island effect in the study area were analyzed,and analyze their causes. Found that the effect of temperature on the air in the city of Dalian factory, commercial,residential temperature significantly higher than over the surrounding mountains, suburbs and other marginal areas 10 ℃, where the water temperature minimum. Integrated temperature changes over the years and years of random surface temperature inversion, can be seen in Dalian urban heat island effect is more obvious, but the high temperature zone of the building with the big Dalian, is expanding northward and metastasis.In recent years.focusing on the rational development of the city, the urban thermal environment of slow growth.So I hope this can provide a reference for the future city of Dalian rational planning and development.