Analysis on Aerodynamic and Thermodynamic Parameters in the Semi －arid Rain Fed Field of Loess Plateau

doi:10．11755/j．issn．1006－7639(2014)－04－0547

Abstract

Abstract:

Based on data from the intensified observational period over spring wheat field area at the arid meteorology and ecological environment experimental station in Dingxi of Gansu Province from June to August 2003，which is located in the semi－arid rain fed agricultural region of Loess Plateau，the aerodynamic roughness Z_0m，the thermodynamic roughness Z_0h and the excess resistance to heat transfer kB ^－1were calculated and analyzed，firstly． Then，the spatial distributions of Z_0m and kB ^－1over eastern part of northwest China were obtained，accompanied by vegetation index I_ndv and surface temperature T_s derived by satellite，respectively． The above parameters can be used to estimate the heterogeneous land surface energy flux．

Key words: Loess Plateau, semi－arid rain fed field, aerodynamic roughness, thermodynamic roughness, excess resistance to heat transfer

摘要：

利用甘肃省定西干旱气象与生态环境试验基地2003年夏季加强观测期间的资料，计算动量粗燥长度热量粗糙长度和热量输送附加阻抗，结合卫星反演的差值植被指数Indv和表面温度Ts将其推广到中国西北区东部，可用于计算非均匀地表能量通量。

关键词: 黄土高原, 半干旱雨养农田, 动量粗糙长度, 热量粗糙长度, 热量输送附加阻抗

CLC Number:

P433

CHEN Qian，LI Baozi，CHEN Tianyu. Analysis on Aerodynamic and Thermodynamic Parameters in the Semi －arid Rain Fed Field of Loess Plateau[J]. Journal of Arid Meteorology, DOI: 10．11755/j．issn．1006－7639(2014)－04－0547.

陈乾，李宝梓，陈添宇. 黄土高原半干旱雨养农田空气动力和热力参数分析[J]. 干旱气象, DOI: 10．11755/j．issn．1006－7639(2014)－04－0547.

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