A temperature-dependent multi-relaxation spectroscopic dielectric model for thawed and frozen organic soil at 0.05&amp;#x2013;15 GHz

Savin, I. Yu.; Миронов, В. Л.

doi:10.1109/igarss.2015.7326198

Cited by 5 publications

(6 citation statements)

References 9 publications

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“…To analyse the radar backscattering variations, Oh's model [11] was used under the assumption of a dielectrically homogeneous active topsoil, without taking into account wave scattering and attenuation in the snow pack and vegetation canopy, and we did not consider the profiles of the permittivity and temperature in the active layer (1), and the dielectric model [6], neglecting snow cover (~0.4m in depth, which is mainly dry in winter and it is transparent environment for L-band). Thus, the calculated reflection coefficient for the optimally found parameters as a function of the soil surface temperature is depicted in Fig.…”

Section: Radar Backscattering Coefficient Depending On Temperature Ofmentioning

confidence: 99%

“…In this paper, the dependences of radar backscattering in the L-band on the soil temperature during cooling and heating of the frozen active layer were investigated at test sites in the Arctic tundra. These temperature dependences are related to the phase transitions of water in the process of cooling and heating of frozen soil [6]. Temperature dependences of complex permittivity (CDP) are well studied during the thawing and freezing of soil samples with a high content of organic matter in laboratory conditions [6].…”

Section: Introductionmentioning

confidence: 99%

“…These temperature dependences are related to the phase transitions of water in the process of cooling and heating of frozen soil [6]. Temperature dependences of complex permittivity (CDP) are well studied during the thawing and freezing of soil samples with a high content of organic matter in laboratory conditions [6]. Such temperature-dependent changes in CDP can to provide measuring not only the thawed or frozen soil states, but also to determine content of unfrozen water and ice, as well as temperature of frozen soil during it cooling and heating process.…”

Section: Introductionmentioning

confidence: 99%

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Temperature dependence of the backscattering coefficient measured by ALOS PALSAR during cooling and heating of tundra topsoil.

Muzalevskiy¹

2019

JRE

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In this paper, dependences of backscattering coefficient on Arctic tundra soil temperature were investigated. The backscattering coefficient was measured by ALOS PALSAR (1.3GHz) over areas near to Imnaviat weather station in the North Slope of Alaska in the period from . It has been experimentally and theoretically shown that there is a strong correlation relationship no worse than 0.76 between the surface soil temperature measured by weather stations and backscattering coefficient. The variations of the backscattering coefficient was found to be about 5-6 dB over the test site when soil surface temperature changes from -10С to 10С. This study contributes to further understanding the processes of scattering of frozen Arctic soils that is pertinent to developing new remote sensing algorithms for the permafrost region.

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Section: Radar Backscattering Coefficient Depending On Temperature Ofmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Temperature dependence of the backscattering coefficient measured by ALOS PALSAR during cooling and heating of tundra topsoil.

Muzalevskiy¹

2019

JRE

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“…Авторами работ [8,9] была разработана температурно-зависимая рефракционная диэлектрическая модель (ТРДМ) для талых и мерзлых почв, данная модель учитывает различные компоненты воды в почвах. Предложенная модель была протестирована с использованием данных диэлектрических измерений и показала хорошее соответствие между рассчитанными и измеренными величинами комплексной диэлектрической проницаемости (КДП) [3].…”

Section: Introductionunclassified

“…Предложенная модель была протестирована с использованием данных диэлектрических измерений и показала хорошее соответствие между рассчитанными и измеренными величинами комплексной диэлектрической проницаемости (КДП) [3]. Также в [8,9]…”

Section: Introductionunclassified

The dielectric method of measurement the latent heat of ice fusion during thawing of frozen soil.

Mironov¹,

Karavaysky²,

Lukin³

et al. 2018

JRE

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Статья поступила в редакцию 5 декабря 2018 г. Аннотация. Проведены экспериментальные исследования изменения массы незамерзшей воды, содержащейся в мерзлой Nа-бентонитовой глине в диапазоне температур от-30 до 0 °C и диапазоне массовых влажностей от 0 до 1 г/г с помощью диэлектрического метода. Предложен калориметрический метод измерения удельной скрытой теплоты плавления льда в связанную и несвязанную воду при нагревании мерзлой почвы. Предложен метод измерения скрытой теплоты плавления льда в мерзлой почве в процессе нагревания методом диэлектрических измерений. С целью обоснования предложенной методики проведено сравнение скрытой теплоты плавления льда при нагревании бентонитовой глины, полученной методом дифференциальной сканирующей калориметрии (ДСК), с рассчитанной с помощью диэлектрического метода. Ключевые слова: диэлектрическая модель, диэлектрическая проницаемость, мерзлые почвы, незамерзшая вода, незамерзающая вода, связанная вода, фазовые переходы, дифференциальная сканирующая калориметрия.

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Improvement in Modeling Soil Dielectric Properties During Freeze-Thaw Transitions

Zhao

Pan

et al. 2022

IEEE Geosci. Remote Sensing Lett.

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Soil freeze-thaw cycles have a profound impact on heat and water fluxes at the land-atmosphere interface and transport in soils. Microwave remote sensing is a widely used technique to detect near-surface soil freeze/thaw states due to significant changes in dielectric properties associated with water phase transitions in soils, where uncertainty remains. This letter proposed a new parameterization scheme for the estimation of unfrozen water content to improve the modeling of soil dielectric properties during freeze-thaw transitions. Predictions from the new model referred as Zhang-Zhao's model were compared with dielectric measurements during thawing processes of soil samples collected from Baoding (silty clay soil), Zhangjiakou (loamy sandy soil), and Zhengzhou (clay loam soil) in China. The mean biases of the predictions were 3.25 (4.44 and 2.07 for the thawed value and frozen value, respectively) and 1.54 (2.22 and 0.88 for the thawed value and frozen value, respectively) for the real part and imaginary part, respectively. The model-predicted soil complex relative permittivity was highly correlated with measurements, with correlation coefficients ranging from 0.7944 to 0.9865. The normalized root mean square errors of the predictions were 13.72% (real part) and 25.41% (imaginary part).

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A temperature-dependent multi-relaxation spectroscopic dielectric model for thawed and frozen organic soil at 0.05–15 GHz

Cited by 5 publications

References 9 publications

Temperature dependence of the backscattering coefficient measured by ALOS PALSAR during cooling and heating of tundra topsoil.

Temperature dependence of the backscattering coefficient measured by ALOS PALSAR during cooling and heating of tundra topsoil.

The dielectric method of measurement the latent heat of ice fusion during thawing of frozen soil.

Improvement in Modeling Soil Dielectric Properties During Freeze-Thaw Transitions

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