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地表温度的时空尺度对热岛研究有很大的影响,利用2003-2015年MODIS地表温度和植被指数产品,TsHARP算法,计算出250m空间分辨率的地表温度,用以分析北京的城...
地表温度的时空尺度对热岛研究有很大的影响,利用2003-2015年MODIS地表温度和植被指数产品,TsHARP算法,计算出250m空间分辨率的地表温度,用以分析北京的城市热岛效应。结果表明,研究区热岛主要分布在丰台、朝阳、石景山、海淀等核心都市圈,另零散分布在房山、昌平、密云、平谷、大兴等区县县城附近,其它如延庆、怀柔等县受地形和水体影响则少有分布。研究区SUHI的时间变化非常显著,6、7月份可达35-40℃,1、2月则只有-5-5℃。其整体上在缓慢增加,上午时刻和下午时刻增加的幅度分别是0.1032℃/a和0.048℃/a。降水和风速对热岛效应有削弱效果,气温和气压具有明显的增强效果,总体上影响的程度从高到低是气温、风速、降水、气压。研究区城区地表温度以0.05/a的速度上升,乡村以0.14/a的速度减少,热岛效应不断增强。
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地表温度的时空尺度对热岛研究有很大的影响,利用2003-2015年MODIS地表温度和植被指数产品,TsHARP算法,计算出250m空间分辨率的地表温度,用以分析北京的城市热岛效应。结果表明,研究区热岛主要分布在丰台、朝阳、石景山、海淀等核心都市圈,另零散分布在房山、昌平、密云、平谷、大兴等区县县城附近,其它如延庆、怀柔等县受地形和水体影响则少有分布。研究区SUHI的时间变化非常显著,6、7月份可达35-40℃,1、2月则只有-5-5℃。其整体上在缓慢增加,上午时刻和下午时刻增加的幅度分别是0.1032℃/a和0.048℃/a。降水和风速对热岛效应有削弱效果,气温和气压具有明显的增强效果,总体上影响的程度从高到低是气温、风速、降水、气压。研究区城区地表温度以0.05/a的速度上升,乡村以0.14/a的速度减少,热岛效应不断增强。
The surface temperature of the surface temperature has a great influence on the heat island research. Using the MODIS surface temperature and vegetation index product, TsHARP algorithm, the surface temperature of 250m spatial resolution is calculated to analyze the urban heat island effect in Beijing. The results show that the study area is mainly distributed in Fengtai, Chaoyang, Shijingshan, Haidian and other core metropolitan areas, and scattered in Fangshan, Changping, Miyun, Pinggu, Daxing and other counties near the county, such as Yanqing, Huairou County by terrain and Water is less affected. The time variation of SUHI in the study area is very significant, and can reach 35-40 ℃ in June and July, and only -5-5 ℃ in January and February. Its overall increase in the slow increase in the morning and afternoon hours, respectively, the increase in the range of 0.1032 ℃ / a and 0.048 ℃ / a. Precipitation and wind speed have a weakening effect on the heat island effect. The temperature and air pressure have obvious enhancement effect. The overall effect is from high to low temperature, wind speed, precipitation and pressure. The surface temperature of the study area is increased by 0.05 / a, and the rate of the island is decreasing at 0.14 / a, and the heat island effect is increasing.
The surface temperature of the surface temperature has a great influence on the heat island research. Using the MODIS surface temperature and vegetation index product, TsHARP algorithm, the surface temperature of 250m spatial resolution is calculated to analyze the urban heat island effect in Beijing. The results show that the study area is mainly distributed in Fengtai, Chaoyang, Shijingshan, Haidian and other core metropolitan areas, and scattered in Fangshan, Changping, Miyun, Pinggu, Daxing and other counties near the county, such as Yanqing, Huairou County by terrain and Water is less affected. The time variation of SUHI in the study area is very significant, and can reach 35-40 ℃ in June and July, and only -5-5 ℃ in January and February. Its overall increase in the slow increase in the morning and afternoon hours, respectively, the increase in the range of 0.1032 ℃ / a and 0.048 ℃ / a. Precipitation and wind speed have a weakening effect on the heat island effect. The temperature and air pressure have obvious enhancement effect. The overall effect is from high to low temperature, wind speed, precipitation and pressure. The surface temperature of the study area is increased by 0.05 / a, and the rate of the island is decreasing at 0.14 / a, and the heat island effect is increasing.
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Temporal and spatial scales of land surface temperature has great influence on the research of heat island, using 2003-2015 MODIS land surface temperature and vegetation index products, TsHARP algorithm, calculate the surface temperature of 250m spatial resolution, for the analysis of Beijing urban heat island effect. The results show that the study area of heat island is mainly distributed in Fengtai, Chaoyang, Shijingshan, Haidian and other core metropolitan area, other scattered in the vicinity of Fangshan, Changping, Miyun County, Pinggu, Daxing County, such as Yanqing, Huairou and other counties affected by terrain and water distribution is less. The time variation of SUHI in the study area is very significant. It can reach 35-40 DEG C in 6 and July. In February, is only -5-5. The overall increase in the slow, morning and afternoon time to increase the amplitude of 0.1032 /a and 0.048 /a. The effect of precipitation and wind speed on the heat island effect is obvious, and the air temperature and air pressure have obvious enhancement effect. The surface temperature of the study area increased with the speed of 0.05/a, and the rate of 0.14/a decreased with the increasing of heat island effect.
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