An Empirical Method of Estimating Soil Thermal Inertia
Joint Authors
Tian, Jing
Su, Hongbo
He, Honglin
Sun, Xiaomin
Source
Issue
Vol. 2015, Issue 2015 (31 Dec. 2015), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2015-07-27
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Abstract EN
A method of estimating soil thermal inertia (STI), which uses midday soil heat flux ( G m ) and diurnal surface temperature amplitude as the inputs, is presented in the paper.
G m is achieved from an empirical relationship between net radiation (Rn) and soil heat flux ( G ).
To validate the STI method, a method proposed by Verhoef, which requires STI and a Fourier series analysis on surface temperature, is used to estimate diurnal G .
By comparing diurnal G estimates and diurnal G measurements, the STI method is evaluated indirectly.
The results show that the diurnal curve of G estimates can coincide with that of G measurements for bare soil, with the correlation coefficient ( R 2 ) of 0.64, bias of 10.1 W·m−2, and root mean squared errors (RMSE) of 40.9 W·m−2.
For the vegetated surface, R 2 is 0.56, bias is −11.9 W·m−2, and RMSE is 49.2 W·m−2.
The large uncertainty in the estimation of G m resulting from the wider variation of the empirical relationship between Rn and G and the difference between mixed surface temperature and soil surface temperature may be the two primary factors for the larger deviation of the diurnal shape and the magnitude between G estimates and G measurements for the vegetated surface.
American Psychological Association (APA)
Tian, Jing& Su, Hongbo& He, Honglin& Sun, Xiaomin. 2015. An Empirical Method of Estimating Soil Thermal Inertia. Advances in Meteorology،Vol. 2015, no. 2015, pp.1-9.
https://search.emarefa.net/detail/BIM-1052734
Modern Language Association (MLA)
Tian, Jing…[et al.]. An Empirical Method of Estimating Soil Thermal Inertia. Advances in Meteorology No. 2015 (2015), pp.1-9.
https://search.emarefa.net/detail/BIM-1052734
American Medical Association (AMA)
Tian, Jing& Su, Hongbo& He, Honglin& Sun, Xiaomin. An Empirical Method of Estimating Soil Thermal Inertia. Advances in Meteorology. 2015. Vol. 2015, no. 2015, pp.1-9.
https://search.emarefa.net/detail/BIM-1052734
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1052734