| 简单生物圈模式 (SiB2) 中湍流能量通量对近地层两类阻抗系数的敏感性研究 |
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| 引用本文： | 张晓惠,高志球,魏东平.简单生物圈模式 (SiB2) 中湍流能量通量对近地层两类阻抗系数的敏感性研究[J].大气科学,2012,36(5):1053-1062. |
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| 作者姓名： | 张晓惠 高志球 魏东平 |
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| 作者单位： | 1.中国科学院研究生院地球科学学院,北京 100049;中国科学院计算地球动力学实验室,北京 100049;中国科学院大气物理研究所大气边界层物理与大气化学国家重点实验室,北京 100029 |
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| 基金项目： | 国家自然科学基金资助项目40874047、40975009,国家重点基础研究发展项目2012CB417203 |
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| 摘 要： | 陆—气之间的能量交换是通过近地层湍流热量和水汽通量来实现的.以往的研究表明近地层阻抗对湍流能量通量有着不同程度的影响,但是关于陆面模式中阻抗系数的取值范围却始终没有统一的标准.为了深入了解简单生物圈模式 (SiB2) 中近地层阻抗系数取值变化对湍流能量通量的影响,我们以那曲站为例,分别采用传统的逐个因子分析法和考虑参数间相互作用的部分因子分析法定量地研究了夏季该观测站近地层湍流能量通量分别对冠层阻抗系数C1和地表阻抗系数C2的敏感性响应.结果表明,感热通量对地表阻抗系数C2更为敏感,而潜热通量则对冠层阻抗系数C1较为敏感;感热通量随C1增加而增大,随C2增加而减小,而潜热通量则随C1或C2的增加而减小;不管是感热通量还是潜热通量,它们对阻抗系数的敏感度随阻抗系数的增大而减小,而对阻抗系数的相对敏感度则随阻抗系数的增大而增大.最后,结合那曲站夏季下垫面稀疏短草的分布特点分析了造成感热通量和潜热通量敏感变化各异的原因.
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| 关 键 词： | 感热通量 潜热通量 阻抗系数 陆面过程 简单生物圈模式(SiB2) 敏感性 |
| 收稿时间： | 2011/11/8 0:00:00 |
| 修稿时间： | 2012/3/29 0:00:00 |
Sensitivity of Surface Energy Fluxes to Two Resistance Coefficients in Simple Biosphere Model (SiB2) |
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| ZHANG Xiaohui,GAO Zhiqiu and WEI Dongping.Sensitivity of Surface Energy Fluxes to Two Resistance Coefficients in Simple Biosphere Model (SiB2)[J].Chinese Journal of Atmospheric Sciences,2012,36(5):1053-1062. |
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| Authors: | ZHANG Xiaohui GAO Zhiqiu and WEI Dongping |
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| Institution: | College of Earth Science, Graduate University of Chinese Academy of Sciences, Beijing 100049;Key Laboratory of Computational Geodynamic, Chinese Academy of Sciences (CAS), Beijing 100049;State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, CAS, Beijing 100029;State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, CAS, Beijing 100029;College of Applied Meteorology, Nanjing University of Information Science and Technology (NUIST), Nanjing 210044;Jiangsu Key Laboratory of Agricultural Meteorology, NUIST, Nanjing 210044;College of Earth Science, Graduate University of Chinese Academy of Sciences, Beijing 100049;Key Laboratory of Computational Geodynamic, Chinese Academy of Sciences (CAS), Beijing 100049 |
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| Abstract: | Surface energy fluxes play a significant role in land-air interaction. To quantify the influence of resistance coefficients on surface energy fluxes in the Simple Biosphere Model (SiB2), the sensitivities of sensible heat flux (H) and latent heat flux (LE) to resistance coefficients are examined by using the one-factor-at-a-time method and fractional factorial analysis method. The results show that, i) H is more sensitive to C2 (called ground to canopy air-space resistance coefficient) while LE is more sensitive to C1 (named bulk canopy boundary-layer resistance coefficient);ii) H increases with increasing C1 and decreases with increasing C2, while LE always decreases with increasing C1 or increasing C2;and iii) the sensitivities of both H and LE decrease with increasing coefficients and their relative sensitivities increase with increasing coefficients. Furthermore, the reasonable explanation about the sensitivity of H and LE are given considering the distribution of land cover and vegetation in Nagqu. |
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| Keywords: | sensible heat flux latent heat flux resistance coefficient land surface process Simple Biosphere Model (SiB2) sensitivity |
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