| 摘要: |
| 基于Landsat 8卫星的热红外波段，通过劈窗反演
算法获取了2015、2016、2017和2019年的北京通州区(含
北京城市副中心)地表温度，分析发现如下结论。1)2015年
的夏季和秋季，西北部和东南部的建成区地表温度明显高于周
边林地和农田区域，总体呈现出片状和零星热岛共存的空间分
布特征；而北京城市副中心的热岛分布格局则呈明显的多中
心，不仅在老城区，位于郊区的宋庄、姚辛庄因建筑面积较
大，也出现了明显的高温区域。随着城市副中心绿化建设的持
续推进，2019年北京城市副中心的局部区域夏季地表温度有
所下降。2)北京城市副中心的老城区冬季“地表冷岛效应”
的出现并不是偶然现象，其原因可能是冬季上午时段，因空气
污染物的影响，太阳辐射强度较弱，下垫面能量输出大于输
入，在传递热量至大气的过程中，郊区的裸露土壤因比热容较
大，降温速度较慢，从而导致其地表温度高于城市下垫面。
3)地表温度与植被覆盖度之间具有明显的负相关关系，城市
绿化引起的植被面积增长有助于缓解整体热岛效应。 |
| 关键词: 风景园林 地表温度 遥感反演 时空分布 城
市副中心 北京通州 |
| DOI： |
|
| 基金项目: |
|
| Spatiotemporal Characteristics of SurfaceTemperature and Greening Role in TongzhouDistrict, Beijing |
| XIE Junfei,CONG Richen,WANG Yuerong,DUAN Minjie |
| Abstract: |
| Based on the thermal infrared band of Landsat 8 satellite,
the surface temperature of Tongzhou District of Beijing (including
Beijing sub-center) in 2015, 2016, 2017 and 2019 were obtained by
split-window inversion algorithm. The analysis found that: 1) in the
summer and autumn of 2015, the surface temperature of the built-
up areas in the northwest and southeast was significantly higher
than that of the surrounding woodland and farmland areas, and
the overall spatial distribution features of flaky and sporadic heat
island coexisted; while the heat island distribution pattern of
Beijing sub-center exhibited a clearly polycentric, not only in the
old city district, but also in Songzhuang and Yaoxinzhuang, which
are located in the suburbs; because of the large construction area,
there were also obvious high temperature areas. As the greening
of the urban sub-center continues to advance, the summer surface
temperature in the partial area of Beijing city sub-center declined in
2019. 2) The emergence of the "surface cold island effect" in winter
in the old city area of Beijing's sub-center is not an accidental
phenomenon, the possible reason is that in the morning of winter,
due to the influence of air pollutants, the solar radiation intensity
is weak, and the energy output of the lower surface is greater than
the input. In the process of transferring heat to the atmosphere, the
exposed soil in the suburbs has a slower cooling rate due to the
larger specific heat capacity, resulting in its surface temperature
being higher than that of the urban underlay. 3) There is a significant
negative correlation between surface temperature and vegetation
coverage, while the increase in vegetation area caused by urban
greening helps to alleviate the overall heat island effect. |
| Key words: landscape architecture surface temperature remote
sensing inversion spatiotemporal distribution urban sub-center Tongzhou District in Beijing |
