Spatio-temporal Differences In Climate Comfort Of Human Settlements In The Three Provinces Of Northeast China And Influencing Factors

As the basic elements of the human settlement,the evolution of the climate affects the climate comfort of the human settlement.Intensified human activities have changed the underlying surface and affected the climate comfort of human settlements,therefore,people began to pay attention to the impact of climate change on the human settlement,and the human settlement climate has also become one of the academic research hot spots.In the past 100 years,human activities have increased the vulnerability of the climate in the three northeastern provinces.At the same time,the resource-based industrial structure is single,and it is of some significance to explore the spatial and temporal differentiation rules of the climate comfort of the human settlement.Based on the monthly data of 80 stations in the three provinces of Northeast China from 1988 to 2018,the human settlement was characterized by comprehensively using the methods of MK mutation test,human settlement climate comfort model,geographic area weighting,geographic detector,R/S method,etc.The differentiation rules and influencing factors of climate comfort degree in human settlements,the following conclusions are drawn:(1)The differentiation law of meteorological elements.In terms of time change,the interannual trends of temperature,humidity,wind speed,and sunshine hours are 0.016?/10 a,-0.216%/10 a,-0.13m/s/10 a,and-4.317h/m/10 a,respectively;season In terms of changes,the temperature difference is the largest in winter and the summer is small: the difference in wind speed in spring is greater than that in summer and autumn;in winter,the spatial difference in relative humidity is the largest,and the summer is the smallest;the spatial difference in sunshine hours between spring and summer is greater than that in autumn and winter.In terms of spatial differentiation,the temperature has a decreasing trend from south to north.The wind speeds in inland areas and plain areas are smaller than those in coastal areas and mountain areas.The relative humidity and sunshine hours show that the eastern area is higher than the western and western values,respectively.The characteristics of the central and eastern parts.(2)The differentiation law of climate comfort degree of human settlement.In terms of time,from June to August,the overall comfort is higher,from January to February,the overall comfort is lower,and the comfort from south to north is reduced;the difference between the two stages of comfort is mainly positive,and the human environment climate The comfort level is generally good;the overall comfort level in spring,summer and autumn is increasing,and the winter comfort level is becoming worse.Spatially,it is divided into 5 categories: the first category is characterized by warm and wet comfort,mainly distributed in most parts of Liaoning(except Fuxin)and the part of Jilin(Liaoyuan,Tonghua,Baishan);the second category is warm and dry and comfortable,distributed in Liaoning Fuxin and Jilin provinces(Siping,Changchun,Jilin,etc.)and Mudanjiang in Heilongjiang;Category III is cold and comfortable including Jixi in Heilongjiang;Category IV is dry and uncomfortable,distributed in Songyuan and Baicheng of Jilin,except Daxinganling area Part;Category V is dry and uncomfortable,mainly in the Greater Xing'an Mountains area of Heilongjiang.(3)Influencing factors and predictions of climate comfort of human settlements.The main influencing factors in summer and winter are temperature and wind speed.Air quality index and urban development level are negatively correlated and weakly positively correlated with the climate comfort of human settlements,respectively;the vegetation coverage has a periodic relationship with it.Forecast: The continuity in the summer half year is stronger than that in the winter half year;the climate comfort level of the provinces and the overall human settlement environment in the summer half year has an upward trend,and the change in the winter half year will be relatively stable.Forecast of the future cycle: The summer half-year in Heilongjiang Province is 9 years,and the winter half-year is 8 years.The summer and winter half-year cycles in Jilin Province are 9 years;the summer and winter half-year in Liaoning Province are 11 years and 16 years;In the past,the average half-year cycles of summer and winter were 5 and 8 years respectively.