热谱指纹空间变化模式构建及其特征分析

Establishment and characteristic analysis of spatial variation pattern of thermal spectrum fingerprint

热谱地图是利用道路的热谱指纹反映不同天气类型冬季夜间道路路面温度空间变化的模式。本文采用热谱地图技术对包茂高速公路桃花源至黑水路段的道路路面状况和2015年冬季(2015年12月至2016年2月)夜间路面温度数据进行处理,构建了桃花源至黑水路段3种天气类型热谱指纹空间变化的模式,并重点分析3种典型天气类型热谱指纹的特征及其相关性、相似性和可靠性。结果表明:2015年冬季包茂高速公路桃花源至黑水路段不同天气类型的夜间热谱指纹变化幅度存在明显的差异,路面温度标准差可作为热谱指纹类型划分的重要指标;不同天气类型热谱指纹的相似度较高(0.78—0.92),且各天气类型的热谱指纹高度相关(显著性水平达0.01);相同天气类型热谱指纹的相似度和相关度均高于不同天气类型的热谱指纹。热谱指纹空间变化模式可有效的描述区域路网冬季夜间路面温度的变化,可为高速公路气象监测站的规划和冬季道路的管护决策提供参考。

Thermal spectrum mapping is a kind of methods that utilizes thermal spectrum fingerprint of the road to reflect the spatial variation of road surface temperature at winter night under different weather conditions. In this paper,a spatial variation model of thermal spectrum fingerprint under three weather conditions from Taohuayuan to Heishui road section was established based on the data of road surface conditions and road surface temperature at winter night at the road section from Taohuayuan to Heishui in Baomao highway in 2015. The characteristics of thermal spectrum fingerprint under three weather conditions and their correlation, similarity and reliability,were analyzed.The results show that there is a clear difference in the change range of thermal spectrum fingerprint under different weather types at the road section from Taohuayuan to Heishui in Baomao highway in 2015. The standard difference of road surface temperature is an important indicator to distinguish the types of thermal spectrum fingerprint.The similarity degree of thermal spectrum fingerprint under different weather types is high,with similarity coefficient in a range from 0. 78 to 0. 92. There are strong correlation in the thermal spectrum fingerprints under different weather types,with the significant level of 0. 01. The similarity and correlation degrees of thermal spectrum fingerprint under the same kind of weather are higher than those under different weather types. The pattern of spatial variation in thermal spectrum fingerprint can be used to effectively describe the change in surface temperature of regional road networks in winter night. It provides a reference for meteorological station planning in highway and winter road management and control decision.