松嫩平原土地利用格局时空变化特征及其与气候因子的关系

Spatial-temporal Characteristics of Land Use Pattern and its Relationship with Climatic Factors in Songnen Plain

该文采用人机交互式方式及Matlab编程获取1985—2015年间松嫩平原土地利用信息、土地利用时空格局变化特征及区域气候因子的变化规律,重点探讨土地利用格局与气候因子的关系。研究表明:松嫩平原综合土地利用动态度及多样性均呈现出先增加后降低的趋势,而其土地利用强度则随着时间推进不断地加强;1980—2018年间松嫩平原平均年降水量呈现下降的趋势,其下降的变化率为-9.89 mm/10a,年平均温度变化呈现上升的趋势,其上升的变化率为0.256℃/10a;土地利用格局与降水呈显著的负相关,而与年平均温度则为正相关性;经偏相关负相关分析得出,土地利用强度对温度的影响程度明显高于其对降水的影响,且强度与降水、温度之间具有明显的负相关性(复相关系数平均值达0.87)。

This paper extracted land use information of songnen plain based on interactive interpretation.Matlab programming was used to obtain the land use pattern changes in the research area from 1985 to 2015.Using trend analysis method and correlation analysis method,this paper studies the spatial and temporal pattern change characteristics of land use and regional climate factors in Songnen Plain from 1985 to 2015,and focuses on the relationship between land use pattern and climate factors.Research shows∶The dynamic attitude of comprehensive land use in songnen plain showed a change trend of first increasing and then decreasing,land use intensity was continuously strengthened,and land use diversity showed a change trend of first increasing and then decreasing;From 1980 to 2018,the annual average precipitation in Songnen Plain decreased with a rate of-9.89 mm∕10a and the annual average temperature increased with a rate of 0.256℃∕10a;The land use pattern is negatively correlated with precipitation,but positively correlated with annual average temperature;According to the partial correlation multiple correlation analysis,the correlation between land use pattern and temperature is significantly stronger than that between land use pattern and precipitation.This shows that the contribution of land use intensity to temperature is greater than that to precipitation.The complex correlation between land use intensity and precipitation and temperature is obvious with an average complex correlation coefficient of 0.87 in most areas of Songnen Plain.