农田和草地下垫面上附加阻尼kB-1变化特征的分析  

Study on kB^(-1) on Farmland and Grass Underlying Surfaces

作　　者：鞠英芹[1,2,3] 徐自为[1] 刘绍民[1] 卢俐[4] 徐同仁[1] 刘寿东[3] 

机构地区：[1]北京师范大学遥感科学国家重点实验室/地理学与遥感科学学院,北京100875 [2]湖北省气象培训中心,武汉430074 [3]南京信息工程大学应用气象学院,南京210044 [4]北京市气象局气象信息中心,北京100089

出　　处：《高原气象》2014年第1期55-65,共11页Plateau Meteorology

基　　金：国家自然科学基金重大研究计划(91125002);中央高校基本科研业务费专项资金

摘　　要：利用2010年阿柔站(草地)和馆陶站(农田)的观测资料,运用阻尼法估算不同下垫面的热传输附加阻尼(kB-1),分析日变化特征,探讨用一个固定kB-1值来估算感热通量,最后将估算值与M_1958、M_1963、M_1982、M_1989、M_1998、M_2002和M_2007七种参数化方案进行比较。结果表明,在不同下垫面上,kB-1变化明显。除玉米下垫面、玉米和裸地混合下垫面外,其余下垫面kB-1均有抛物线型日变化,与地气温差具有相关性。在植被下垫面,可用中值或均值的kB-1计算感热通量。将不同参数化方案计算的感热通量与观测值之间进行比较发现,在裸地下垫面,与观测值最接近的参数化方案是M_1998方案;在混合地表则为M_1958、M_1963和M_2007方案。Based on the data of Eddy Covariance （EC） system and Automatic Weather Station （AWS） collected at Guantao （farmland） and A＇ rou （grass） sites in 2010, the rnethod of estimating kB -1 is impedance method. The results have been used to analyze the daily variation characteristics of kB -1 and to explore the possibility of using a fixed value to estimate sensible heat flux. And then, the estimates are compared with the values from the value of using seven parameterization schemes of M_1958, M 1963, M_1982, M_1989, M_1989, M 2002, and M_2007. The result shows that the values of kB-1have a obvious range on different underlying surfaces. kB- 1 has a diurnal variation and also a good correlation with sul-face-air temperature difference, except maize and maize/bare soil. On the vegetation, the sensible heat flux is e, stimated with a median or mean value of kB- Comparing sensible heat flux using different parameterization schemes with the observed values, results of M_ 1998 are most close to the observe value on bare soil while in mixed terrain surface, M_1958, M_1963, and M _2007 are close to the observe value.

关 键 词：热力学附加阻尼 涡动相关仪 参数化方案 感热 通量 

分 类 号：P404[天文地球—大气科学及气象学]