南岭山地高速公路路面温度变化特征分析  

Characteristics of Road Surface Temperature on Freeway over Nanling Hilly Region

作　　者：吴晟[1] 吴兑[2] 邓雪娇[2] 谭浩波[2] 

机构地区：[1]香港科技大学工学院 [2]中国气象局广州热带海洋气象研究所,广州510080

出　　处：《气象科技》2006年第6期783-787,共5页Meteorological Science and Technology

基　　金：国家自然科学基金项目(49975001)资助

摘　　要：使用2003年3月至2005年8月南岭山地京珠高速公路粤境北段云岩路段3套自动气象站的逐分钟路面温度、地温、气温、湿度、风向、风速等气象资料,分析研究了南岭山地高速公路的路面温度特征及其与天气状况、气温、风速等气象条件的关系,并讨论了地形对南岭山地高速公路路面温度的影响。研究结果表明,南岭山地高速公路晴天和多云时的路面温度日变化明显,与辐射过程密切相关。路温与气温、地温的差异在晴天午后最为明显。晴天时路温、地温、气温的年变化趋势比较一致,路温与地温之间保持着明显的温差;多云天气时路温与地温的差值明显缩小,阴天时路温与地温的差值非常小。地形对路面温度有明显影响,高海拔地区路面温度相对较低,南岭北坡路面温度明显高于南坡,与局地小地形有关。高温过程时路面温度最高接近60℃,地温也超过50℃,持续高温对行车安全、路面和路基结构均有很大威胁。By using the minutely road surface temperature, ground temperature, air temperature, humidity, wind direction, and wind speed data from March 2003 to August 2005 from three automatic meteorological stations located to the north of the Jingzhu Freeway over the Nanling mountainous region of Guangdong Province, an analysis is made of the characteristics of freeway surface temperature in the Nanling hilly region and its relationship with meteorological factors such as weather conditions, ground and air temperature, wind speed, etc., as well as the effect of topography on road surface temperature. The results shows that the diurnal variation of road surface temperature is obvious in sunny and cloudy days; the discrepancy among road surface temperature and ground and air temperature is the most obvious in the sunny afternoon; the annual change tendencies of road surface temperature, ground and air temperature are about the same; the differences between road surface temperature and ground temperature is obvious in fine days, while obviously small in cloudy days and very small in overcast days; the topography has obvious effect on road surface temperature with the road surface temperature at north slope being obviously higher than that at south slope; the maximum road surface temperature in high temperature process can reach almost 60 ℃ and ground temperature also over 50 ℃. The continued high temperature threatens vehicle safety, as well as road surface and roadbed.

关 键 词：南岭山地 高速公路 路面温度 地温 气温 

分 类 号：P467[天文地球—大气科学及气象学]