Observations of soil heat flux at Pune using a heat flux plate

Kelkar, R. R.; Chivate, V. R.; Dubey, R. C.

doi:10.54302/mausam.v31i1.4297

Cited by 3 publications

(2 citation statements)

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“…Estimation of heat flux from the soil temperature data can provide an understanding of the gain or loss of heat by the soil from the atmosphere. Many previous studies have been conducted on similar issues such as soil temperature prediction, heat storage variations, thermal diffusivity of the soil, and so on [2][3][4][5][6]. Climatic conditions on the earth's surface are in part a function of varying physical position (elevation, latitude, and aspect) and the influence of large-scale meteorological forces such as air and ocean currents.…”

Section: Introductionmentioning

confidence: 99%

“…The properties of the surface soil layer, including colour, water content, texture, and density, affect the partitioning of incident radiation and the amount of energy used to evaporate water, warm the air above the ground, or warm the soil. The amount of thermal energy that moves through an area of soil in a unit of time is the soil heat flux or heat flux density [2]. The ability of soil to conduct heat determines how fast its temperature changes during a day or between seasons.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Near-Earth Surface Temperature on Soil Temperature at 5 cm Depth

Adebayo

Lawal

Obasi-Oma

et al. 2022

PSIJ

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The research investigates the effects of ground surface temperature (air temperature) on soil temperature at a depth of 5 cm. The study covers a period of fourteen (14) months from May 2010 to June 2011 in Akure, Southwestern Nigeria. With the aid of an automatic weather station, temperature readings were taken at a depth of 5 cm below the soil surface at five (5) minute intervals daily. It was also observed that many analyses of soil temperature are based on the theories of heat flow and energy balance. The study reveals that surface temperature has a weak effect on soil temperature. The best correlation coefficient obtained for the study period is about 0.56 with a quadratic equation of order 2 at 5% significance level. This implies that air temperature cannot be solely used to predict soil temperature at a depth of 5 cm. A study of diurnal variation reveals that air temperature is usually higher than soil temperature during the day, and vice versa. The study also revealed that surface and soil temperatures are generally lower during the wet months when compared with the dry months. The wet season average daily temperatures are 23.42oC and 27.69oC for air and soil while the corresponding dry season values are 33.92oC and 30.91oC respectively. The results are recommended for agricultural purposes such as determination of soil and environmental conditions for crop production.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Near-Earth Surface Temperature on Soil Temperature at 5 cm Depth

Adebayo

Lawal

Obasi-Oma

et al. 2022

PSIJ

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Temperature mapping, thermal diffusivity and subsoil heat flux at Kariavattom of Kerala

Chacko

Renuka

2002

J Earth Syst Sci

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We have studied the soil and air temperature characteristics over a period of one year at Kariavattom of Kerala. Thermal diffusivity (k s) of the soil has been calculated by range and lag methods and also from amplitudes and phase angles of first and second harmonics. The two methods lead to similar results. Diurnal soil heat flux and soil temperatures at different depths are modelled and found to be comparable with observations.

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Soil heat flux and day time surface energy balance closure at astronomical observatory, Thiruvananthapuram, south Kerala

Roxy

Sumithranand²,

Renuka

2014

J Earth Syst Sci

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Soil heat flux is an important input component of surface energy balance. Estimates of soil heat flux were made in the year 2008 using soil temperature data at Astronomical Observatory, Thiruvananthapuram, south Kerala. Hourly values of soil heat flux from 00 to 24 LST are presented for selected days typical of the winter, pre-monsoon, SW monsoon and NE monsoon seasons. The diurnal variation is characterized by a cross-over from negative to positive values at 0700 h, occurrence of maximum around noon and return to negative values in the late evening. The energy storage term for the soil layer 0-0.05 m is calculated and the ground heat flux G * is estimated in all seasons. Daytime surface energy balance at the surface on wet and dry seasons is investigated. The average Bowen's ratio during the wet and dry seasons were 0.541 and 0.515, respectively indicating that considerable evaporation takes place at the surface. The separate energy balance components were examined and the mean surface energy balance closure was found to be 0.742 and 0.795 for wet and dry seasons, respectively. When a new method that accounts for both soil thermal conduction and soil thermal convection was adopted to calculate the surface heat flux, the energy balance closure was found to be improved. Thus on the land surface under study, the soil vertical water movement is significant.

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Observations of soil heat flux at Pune using a heat flux plate

Cited by 3 publications

References 0 publications

Effect of Near-Earth Surface Temperature on Soil Temperature at 5 cm Depth

Effect of Near-Earth Surface Temperature on Soil Temperature at 5 cm Depth

Temperature mapping, thermal diffusivity and subsoil heat flux at Kariavattom of Kerala

Soil heat flux and day time surface energy balance closure at astronomical observatory, Thiruvananthapuram, south Kerala

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