Semi-stationary measurement as a tool to refine understanding of the soil temperature spatial variability

Lehnert, Michal; Vysoudil, Miroslav; Kladivo, Petr

doi:10.1515/intag-2015-0038

Cited by 5 publications

(5 citation statements)

References 18 publications

(20 reference statements)

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“…The average of soil temperature from all research points is in good fit with the value at the reference station, a confirmation of the relevance of the field experiment and of the adequate location of the meteorological station Olomouc-Holice for soil temperature measurement. The results of the experiment also confirm the assumption that it is not possible to find any simple relation between soil temperature and city parts, urban building types etc., which is similar to the complexity of differences in soil temperature between urban and suburban landscape (Lehnert et al, 2015).…”

Section: Discussionmentioning

confidence: 56%

“…Tang et al (2011) also used semi-stationary measurements (600 research points in two days of August 2010) to detect larger spatial variability of soil temperature within a city. In our previous study (Lehnert, 2013b) we analysed stationary (station) measurements in Olomouc and its surroundings but we did not detect any clear influence of the city on soil temperature but we showed that spatial variability of soil temperature in urban and sub-urban landscape could be studied in further detail by means of field measurements (Lehnert et al, 2015). Considering the growing interest in the topic of temperature and thermal regimes of soils in urban environment, we aim in this case study to assess spatial variability of average daily soil temperature in the city of Olomouc, Czechia using two days of detailed field measurements of soil temperature.…”

Section: Introductionmentioning

confidence: 82%

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Spatial variability of soil temperature in an urban area: A case study for a medium-sized European city

Lehnert¹,

Šimáček²,

Fiedor³

et al. 2021

Geographica Pannonica

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Even though soil temperature in urban environment influences a range of processes, it has been studied rather sparsely in comparison with surface temperature or air temperature. Our research extends the soil temperature observation in Olomouc (Czechia) and uses semi-stationary measurement to describe detailed spatial variability of soil temperature in the area of a medium-sized Central European city. Differences in soil temperature 20 cm below grass-covered surface may exceed 3°C due to soil type, shadow cast by buildings and grass characteristics, which means that the representativeness of the data on soil temperature from a meteorological station within a city may be limited. Further research and a conceptual approach towards the study of soil temperature in urban landscape is needed.

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Section: Discussionmentioning

confidence: 56%

Section: Introductionmentioning

confidence: 82%

Spatial variability of soil temperature in an urban area: A case study for a medium-sized European city

Lehnert¹,

Šimáček²,

Fiedor³

et al. 2021

Geographica Pannonica

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“…In order to contribute to long-term strategic planning of the activities and their sustainable management, longer measurements during different seasons, measurement of nighttime meteorological values and soil temperatures (e.g. Lehnert et al, 2015) would be beneficial.…”

Section: Discussionmentioning

confidence: 99%

Investigating micrometeorological differences between saline steppe, forest-steppe and forest environments in northern Serbia during a clear and sunny autumn day

Milošević¹,

Dunjić²,

Stojanović³

2020

Geographica Pannonica

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Saline habitats of the Pannonian plain are specific regarding their extraordinary biodiversity with many endemic species, yet they are among the most threatened European Communities with limited spatial distribution. These habitats are present in the Autonomous Province of Vojvodina in the North of Serbia, in the area of Srednja Mostonga, and they are in the procedure of protection as the II category protected area - "region of exceptional characteristics". Great variety of rare and endemic species makes this area interesting for recreational and educational activities. In this paper we investigate micrometeorological and outdoor thermal comfort conditions in different natural environments at the area of Srednja Mostonga. This is the first micrometeorological field measurement study conducted in this region. Measurements were performed during the daytime of a sunny autumn day in 2019. The results showed that daytime air temperature was up to 3.4 °C lower in forest compared to steppe, while relative humidity was up to 5-6% higher in forest than in steppe with up to 3.2 m/s lower wind speeds in forest than in steppe area. Micrometeorological values were similar between forest-steppe and steppe. However, the outdoor thermal comfort conditions expressed via Humidex showed that 'some discomfort' was most often observed in forest-steppe during 27% of measurement time, followed with 13% of 'some discomfort' observed in steppe and only 1% of 'some discomfort' was observed in forest. Accordingly, during the warmest daytime hours outdoor activities could be performed in forest, while early morning and evening hours could be spent in steppe and forest-steppe areas of Srednja Mostonga.

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“…It governs the soil physical, chemical and biological processes (Buchan, 2001). It also influences the interspheric processes of gas exchange between the atmosphere and the soil (Lehnert et al, 2014), (Tyson et al, 2001). The amount of radiation received by the soil affects soil temperature (Haskel et al, 2010), the heat capacity of a soil depends on factors which are inherent to the soil itself (include the mineralogical composition and the organic component of the soil) and those which can be managed or controlled to a certain extent (Wierenga et al, 1969).…”

Section: Introductionmentioning

confidence: 99%

“…Also, the thermal properties in the soil depend on soil state and its physical properties, and may be considered as semi-stable Lehnert et al (2014). However, information on thermal properties of soils is very limited.…”

Section: Introductionmentioning

confidence: 99%

Impact of Soil Amendments on Soil Heat and Moisture Content in Calcareous soil

Hoda

2019

Alexandria Science Exchange Journal

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A field experiment was carried out to study the impact of soil amendments on soil heat content and soil moisture content in calcareous soil. Experimental field, located in the Desert Research Centerʾs station in Ras Sudr, South Sinai. Three rates of sheep dung were used (0, 5 and 10 ton/ fed), sheep wool (0.5 and 1 ton/fed) and their combination (5 ton/fed sheep dung and each of 1 and 0.5 ton/fed sheep wool). Two rates 100% and 75% of available water were applied using drip irrigation system. Sorghum (Sorghum bicolor L. Monech) was planted in 1 st June, 2016. The soil temperature was recorded and moisture content was determined at the same times after each plants cutting every an hour, from 9.00 am until 6.00 pm in July, August and September months for 0-5, 5-10 and 10-15 cm soil depths. Heat content was calculated in Calories for each soil depth. The obtained results reveal that, the maximum soil heat content increased in the following order : 10 ton/fed sheep dung > 5 ton/fed sheep dung > combination (5 ton/fed sheep dung with 1 ton /fed sheep wool > combination (5 ton / fed sheep dung + 0.5 ton /fed sheep wool) > 1 ton /fed sheep wool > 0.5 ton /fed sheep wool > control (un treated). The following equation: was applied to calculate the total area under curve of the heat content (Heat Index HI), In July month, the 0-5 cm soil depth, results showed increase for Heat Index, of 10 ton /fed and 5 ton/fed sheep dung amendments with (100 and 75 % water applied) compare to control. The rates of increasing were 13.32, 10.49 %, 13.78 and 12.03 % for up above treatments respectively. While, the increase rate of the integrated heat content of 1 ton /fed and 0.5 Ton/ fed sheep wool with (100 and 75 % water applied) was < 1 %. In the soil depth 5-10 cm, the results showed the rates of increasing were 14.63, 12.18, 10.07 and 11.68% for sheep dung amendments, 1.18 and 1.55 % of 1 ton /fed and 0.5 ton/ fed sheep wool, respectively. The increase of (Heat Index, HT) was slightly in 10-15 cm soil depth. The same trend was found in August and September months. But HI in August month was higher than the total heat content under area in July and September. The results were highly significant in HI as 100 & 75% of irrigation water applied for 0-5 and 5-10 cm soil depths. There was no significant of sheep wool treatment. There was no significant for 10-15 cm soil depth each of soil amendments and water applied in July and August month, but it had significant differences in September month. The results showed a significant increment in HI in the depth 10-15 cm at the end of the experiment, due to the influence of root growth.

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Semi-stationary measurement as a tool to refine understanding of the soil temperature spatial variability

Cited by 5 publications

References 18 publications

Spatial variability of soil temperature in an urban area: A case study for a medium-sized European city

Spatial variability of soil temperature in an urban area: A case study for a medium-sized European city

Investigating micrometeorological differences between saline steppe, forest-steppe and forest environments in northern Serbia during a clear and sunny autumn day

Impact of Soil Amendments on Soil Heat and Moisture Content in Calcareous soil

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