工程地质学报Issue(5)：948-953,6.DOI:10.13544/j.cnki.jeg.2015.05.018
多年冻土区典型地面浅层地温对降水的响应
RESPONSE OF SHALLOW GROUND TEMPERATURE TO PRECIPITATION AT DIFFERENT GROUND COVERS IN PERMAFROST REGION
摘要
Abstract
There are complex hydrothermal processes in the atmosphere,the ground surface and the frozen soil. Precipitation is the main source of water supply on Qinghai-Tibetan Plateau,forms a discontinuous change layer of hydrothermal in the shallow ground.We analyze the temperature changes under the difference ground surface at different precipitation times.We use the in-situ monitoring data of precipitation and the temperature in the shallow ground from 0 to 80cm in depth under the engineering pavement(asphalt and gravel pavement)and the natural ground(alpine steppe and alpine meadow).The results show the follows.Annual precipitation is increased every year in Beiluhe area.The increase rate is 22.9mm·a-1 .Precipitation mainly concentrates in 5 ~9months.Response to temperature during daytime is intense than that at night for precipitation.Temperature change under engineering pavement is greater than that under natural ground at night.Under the same precipitation condition,temperature variations in 10:00 ~15:30 duration is greater than those in 16:00 ~18:00.As the precipitation increases,the decrease of temperature increases.The depth of temperature response to the precipitation is 0~30cm deep range of gravel pavement,alpine steppe,and alpine meadow.The influence depth of asphalt pavement is 0 ~20cm deep range.Affected by the impermeable layer of pavement,and magnitude of the temperature at 5cm depth is greater than that at the surface.This study provides data to divide the different heat transfer mode stratification under different ground surfaces.关键词
降水/地面温度/地温/影响范围Key words
Precipitation/Surface temperature/Ground temperature/Sphere of influence分类
天文与地球科学引用本文复制引用
张中琼,吴青柏,刘永智,侯彦东,高思如..多年冻土区典型地面浅层地温对降水的响应[J].工程地质学报,2015,(5):948-953,6.基金项目
国家青年自然科学基金（41301071），国家重点自然科学基金（41330634），中国科学院寒旱所青年人才基金，冻土工程国家重点实验室自主研究项目（SKLFSE－ZQ－19）资助． （）
