基于TM影像的哈尔滨市主城区绿地降温作用研究

发布时间：2018-03-19 13:44

本文选题：哈尔滨市主城区　切入点：绿地降温　出处：《地理科学》2017年10期 　论文类型：期刊论文

【摘要】：选取2001年、2005年、2013年和2015年的4期同季TM影像为数据源,利用单窗算法反演哈尔滨市主城区地表温度,以SPOT影像为数据源提取30块城市绿地斑块,将地温空间格局与城市绿地斑块进行空间耦合分析,以揭示绿地对城市热岛地温格局的干扰影响。结果表明:从空间上看,哈尔滨市主城区热岛效应显著,主城区分布着大面积高温区和次高温区,极高温区则呈点状、面状或带状孤岛型分布特点;从动态上看,城市热岛的空间格局呈现从城市中心的老城区逐渐向外围新开发建设区域扩展的特点。绿地斑块内部平均温度除与自身特征有关外,还与其空间布局和周边景观格局相关。绿地斑块降温程度和降温范围与绿地斑块面积呈正相关关系,与绿地斑块形状指数呈负相关关系,绿地降温范围与绿地斑块周长呈正相关关系。当绿地斑块面积为0.055 km~2时,绿地斑块对周边温度的降温效率较好,当绿地斑块面积在0.070 km~2时,绿地斑块对周边降温的面积效率较好。
[Abstract]:The TM images of 2001, 2005, 2013 and 2013 were selected as data sources, and 30 urban green patches were extracted from SPOT images using single window algorithm to retrieve the surface temperature of the main urban area of Harbin. The spatial coupling analysis between the spatial pattern of geothermal and the patch of urban green space was carried out in order to reveal the interference effect of green space on the pattern of urban heat island. The results showed that the effect of heat island on the main urban area of Harbin was significant from a spatial point of view. In the main urban area, there are large areas of high temperature area and sub high temperature area, and the extremely high temperature area has the characteristics of dot, plane or strip island distribution, from the dynamic point of view, the distribution of the main urban area is characterized by a large area of high temperature area and a sub high temperature area. The spatial pattern of urban heat island is gradually expanding from the old urban area in the center of the city to the new development and construction area in the periphery. The average temperature of green patch is related to its own characteristics. It was also related to the spatial distribution and landscape pattern of green space. The degree and scope of green patch cooling were positively correlated with green patch area, and negatively correlated with green patch shape index. When the green patch area was 0.055 km ~ 2:00, the green patch had better cooling efficiency to the surrounding temperature, and when the green patch area was 0.070 km ~ 2:00, there was a positive correlation between the green space cooling range and the green patch perimeter. The green patch has better efficiency for cooling the surrounding area.
【作者单位】：哈尔滨师范大学黑龙江省普通高等学校地理环境遥感监测重点实验室;
【基金】：国家自然科学基金面上项目(41571199) 黑龙江省自然基金项目(QC2016050)资助~~
【分类号】：P407;P461.7;X16

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