广东省裸地和草地地表温度时空分布特征  

Temporal and Spatial Distribution Characteristics of Bare Land and Grass Surface Temperature

作　　者：刘霞[1] 景元书[1] 王春林[2] 

机构地区：[1]南京信息工程大学应用气象学院,南京210044 [2]广东省气候中心,广州510080

出　　处：《中国农业气象》2011年第1期28-34,共7页Chinese Journal of Agrometeorology

基　　金：基于模型的干旱动态监测评估方法和业务系统项目(CMATG2009MS22);江苏省科技项目(BS2006059)

摘　　要：利用广东省86个站点裸地和草地2006-2008年自动观测资料,分析了两种下垫面地表温度日、年变化特征及其空间分布规律。结果表明:(1)裸地和草地温度(0cm)的日变化趋势一致,其日最高温度出现时间较日最高气温分别提前1.18±0.95h和1.37±1.05h,日最低温度出现时间比日最低气温分别提前0.20±0.66h和0.45±0.80h。(2)裸地和草地作为透水性下垫面,其日平均温度、日最高温度、日最低温度和日较差具有相同的温度变化趋势,但草地有草皮覆盖,日较差低于裸地。(3)广东裸地和草地日平均温度、日最高温度和日最低温度均有明显的纬向分布特征,日平均温度和日最高温度在夏半年由南向北递增,冬半年相反;受城市热环境的影响,广州及其附近的站点裸地和草地的温度指标也相应高于周边地区。By means of the ground in situ document from Guangdong 86 weather stations,the temporal and spatial distribution characteristics of bare land and grass land surface temperatures were analyzed.Results demonstrated that the bare land and grass land surface temperatures had the same tendency upon diurnal surface temperature,which was basically synchronized with the pattern of air temperature.The maximum temperature of bare land and grass surfaces occurred earlier than air temperature for about 1.18±0.95h and 1.37±1.05h,respectively,while the intervals between the minimum temperature with air temperature were about 0.20±0.66h and 0.45±0.80h,respectively.The annual variation of lands diurnal maximum,minimum and average temperature,as well as the temperature daily-range had the similar tendency as the permeability land surface,but the temperature daily-range of grass land was less than bare land.The average diurnal temperature,diurnal maximum temperature and diurnal minimum temperature for the bare land and grass surfaces presented obvious feature of latitudinal distribution.Daily average temperature and daily maximum temperature of bare land and grass increased from south to north in the summer half year and had opposite situation in the winter half year.Due to the urban heat island,the bare and grass land surface temperatures in Guangzhou as well as in the nearby stations were relatively higher than that of the around areas.

关 键 词：裸地和草地 地表温度 时空分布特征 

分 类 号：S161.2[农业科学—农业气象学]