Comparison of two soil temperature algorithms for a bare ground site on the Loess Plateau in China
文献类型：期刊论文
| 作者 | Gao, Zhiqiu1; Lenschow, Donald H.2; Horton, Robert3; Zhou, Mingyu1,4; Wang, Linlin1; Wen, Jun5 |
| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
 |
| 出版日期 | 2008-09-19 |
| 卷号 | 113期号:D18页码:11 |
| ISSN号 | 2169-897X |
| DOI | 10.1029/2008JD010285 |
| 通讯作者 | Gao, Zhiqiu() |
| 英文摘要 | Two thermal transfer algorithms for soil are used to investigate the diurnal vertical temperature variation in the common case of a vertically heterogeneous thermal diffusivity and the considerable liquid water flux which generally exists in soil when surface evaporation is large. One algorithm assumes that soil is vertically homogenous and takes into account only thermal conduction, and the other, developed in our recent study, considers the vertical heterogeneity of thermal diffusivity in soil and couples thermal conduction and convection (e. g., heat transfer by water flux). Theoretically the two methods are identical for vertically homogenous dry soil. On the basis of soil temperature data collected at a bare soil site over the Loess Plateau of China during the period from DOYs 197 to 241, 2005, we found that the new algorithm gives a realistic estimate of soil temperature while the previous one, on average, overestimates either the diurnal amplitude by 0.95 K or the phase shift by 0.207 rad (i.e., 47.44 min) at the soil depth of 0.10 m. Using the new algorithm and measurements of soil temperature, we determine the soil thermal diffusivity and a variable that represents the sum of the vertical gradient of soil thermal diffusivity and water flux density at three levels within the first 0.40 m of the soil surface. We also simulate the soil temperature for the depths of 0.20 m and 0.40 m, and the results are in satisfactory agreement with direct measurements. The main contribution here is to provide analytic insight into the role of heterogeneity and some simple formulae as tools for interpretation of the role of heterogeneity in observed diurnal temperature variations. |
| 收录类别 | SCI |
| WOS关键词 | SURFACE PARAMETERIZATION SIB2 ; HEAT-FLUX ; CONDUCTION-CONVECTION ; MODEL ; GCMS |
| WOS研究方向 | Meteorology & Atmospheric Sciences |
| WOS类目 | Meteorology & Atmospheric Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000259396400004 |
| 出版者 | AMER GEOPHYSICAL UNION |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2556142 |
| 专题 | 寒区旱区环境与工程研究所 |
| 通讯作者 | Gao, Zhiqiu |
| 作者单位 | 1.CAS, Inst Atmospher Phys, State Key Lab Atmospher Boundary Layer Phys & Atm, Beijing 100029, Peoples R China 2.Natl Ctr Atmospher Res, Boulder, CO 80303 USA 3.Iowa State Univ, Dept Agron, Ames, IA 50011 USA 4.Polar Res Ctr China, Key Lab Polar Sci, Shanghai 200129, Peoples R China 5.CAS, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China |
| 推荐引用方式 GB/T 7714 | Gao, Zhiqiu,Lenschow, Donald H.,Horton, Robert,et al. Comparison of two soil temperature algorithms for a bare ground site on the Loess Plateau in China[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2008,113(D18):11. |
| APA | Gao, Zhiqiu,Lenschow, Donald H.,Horton, Robert,Zhou, Mingyu,Wang, Linlin,&Wen, Jun.(2008).Comparison of two soil temperature algorithms for a bare ground site on the Loess Plateau in China.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,113(D18),11. |
| MLA | Gao, Zhiqiu,et al."Comparison of two soil temperature algorithms for a bare ground site on the Loess Plateau in China".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 113.D18(2008):11. |
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来源：寒区旱区环境与工程研究所
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