The Change Trend And Influence Factor Analysis Of Frozen Soil In Heilongjiang Province

With the increase of human activities,global warming has been recognized,climate change has caused a variety of ecological problems.The changes of permafrost have a great influence on the ecological environment.Scientists believe that the permafrost changes in the past few decades are the result of climate warming,and the study of permafrost has important implications and implications for our lives.The permafrost in northeast China is one of the most affected areas,and the permafrost region in Heilongjiang Province has a significant degradation in recent years.Using the statistical methods of spatial statistical analysis and climatic tendency of Arc GIS,this paper analyzes the 0 cm surface temperature data of 83 meteorological stations in Heilongjiang province and the variation trend of permafrost in 8 different depths in the 1961-2010 years of 5 cm-320 cm,analyzes the time and Space and other changing trends.The variation characteristics of permafrost temperature in this area were obtained under the background of climate warming.The relationship between the ground temperature and the temperature and precipitation in Heilongjiang Province is analyzed in detail.The study found that latitudinal location is one of the main causes of the temperature difference of frozen soils.The distribution of frozen soils has obvious latitudinal pattern.With the increase of latitude,the average annual surface temperature of Heilongjiang Province gradually decreases from south to north,and most of the isotherm of the area is basically parallel to the parallel line.Except for the summer,the variation of surface temperature with latitude in each season shows similar characteristics to the annual average.The freezing date and latitude of frozen soil in Heilongjiang Province also have a great relationship.The freezing date of high-latitude weather stations is earlier than the freezing date of weather stations at low latitudes.The spatial distribution patterns of the nine geopotential temperatures at the depth of 5 to September are basically the same,and the distribution of isotherms in some regions is still along the latitude direction.Analysis of the characteristics of the frozen land temperature over the past 50 years shows that the sinusoidal changes in the surface temperature at various sites in Heilongjiang Province indicate that the surface temperature in Heilongjiang Province and each site has increased for the past 50 years.Winter>spring>autumn>summer.The climate trend rates are: 0.470°C/year,0.032°C/year,0.028°C/year,and 0.026°C/year.The annual average surface temperature is 0.034°C/year.The 9-depth average temperature in May-September in Heilongjiang province showed a trend of warming during 1961-2010.The surface temperature and temperature of Heilongjiang Province in the past 1061-2010 years are on the rise.Spring temperature and surface temperature rise are more obvious,summer and autumn temperature and surface temperature growth trend are slightly smaller than in spring,winter temperature and surface temperature rise the most amplitude.On the whole,the temperature rise is higher than the surface temperature,which accords with the law of temperature and geothermal growth.The relationship between the temperature and the 0 cm-320 cm was positively correlated with the increase of the depth,the relativity of average ground temperature decreased,and the influence of temperature on the geothermal was gradually weakened.In addition to 160 cm and 320 cm geothermal,the correlation between average ground temperature and mean precipitation was significant and positive correlation.With the increase of the depth,the correlation between average and moderate average precipitation decreases gradually.