Estimation of surface energy fluxes from remotely sensed data over Akure, Nigeria

Ogunjobi, K. O.; Daramola, Mojolaoluwa Toluwalase; Akinsanola, A. A.

doi:10.1007/s41324-017-0149-8

Cited by 16 publications

(5 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The subsoil heat flux were higher in the wet season than the dry season. This aligns with the results reported by other researchers [5,12]. Increasing moisture content in the soil increases the specific heat of the soil thus leading to an increase in the soil heat flux.…”

Section: Resultssupporting

confidence: 93%

Effect of Phyisco-chemical Parameters on the Thermal Diffusivity and Soil Heat Flux over Ayadi, Ondo State, Nigeria

Adedayo¹

2020

njpap

View full text Add to dashboard Cite

This study assesses the effect of some soil physical properties on the thermal diffusivity and soil heat flux over Ayadi in Ondo State, Nigeria. Physical properties of the soil at different depths were determined using laboratory techniques. In-situ measurement of air temperature and surface soil temperature were carried out. The phase lag method was used to determine the thermal diffusivity of the soil, while the subsoil heat flux was determined from values obtained for the thermal diffusivity. The result showed that the subsoil heat flux values during the dry season ranged between 0.58 and 52.84 W/m2, while that of the wet season ranged between -0.77 and 98.50 W/m2. The average thermal diffusivity values at the different depths had values between 0.74 × 10-7 and 238.7 × 10-7 m2/s for the dry season, while the wet season had a range of 1.97 × 10-7 to 238.7 × 10-7 m2/s. Keywords: soil moisture content, air temperature, soil temperature, soil heat flux, thermal diffusivity.

show abstract

Section: Resultssupporting

confidence: 93%

Effect of Phyisco-chemical Parameters on the Thermal Diffusivity and Soil Heat Flux over Ayadi, Ondo State, Nigeria

Adedayo¹

2020

njpap

View full text Add to dashboard Cite

show abstract

“…According to Barat et al [34], the rapid development of metropolitan areas accounts for intensification of the temperature of the land surface. Urbanization and its associated activities have brought about changes in the thermal situation of an area [35][36][37][38], greatly affecting the intensity of SUHI, as factors such as impervious surfaces, intense human activities and reduced vegetation cover all bring about increase in the urban temperature [39][40][41]. This consequently affects the thermal comfort condition of the region [42,43].…”

Section: Land Use Land Cover Changementioning

confidence: 99%

Investigation of the changing patterns of the land use land cover over Osogbo and its environs

et al. 2019

View full text Add to dashboard Cite

The progressive nature of urbanization plays a prominent role in land–atmosphere processes, which have corresponding impacts on the general environment. This research investigated the changing patterns of the land use land cover over Osogbo and its environs using remote sensing data obtained from Landsat TM, ETM+ and OLI/TIRS sensors. The changes in four land use classes were assessed for the years 1984, 2000 and 2015. The land surface temperature (LST) of the area was estimated from the satellite images covering the study periods, and the surface urban heat island (SUHI) process was also investigated between the city of Osogbo and the surrounding towns. The results showed major urban expansion leading to urban sprawl within the vicinity. Urban area increased by 5106 ha while vegetation decreased by 8653 ha between 1984 and 2015 indicating major variations in the land surface features. This was revealed by the increase in the LST over the locations which ranged between 22.6°C and 30°C (mean, 25.2°C) in 1984 and between 29.3°C and 36.7°C (mean, 31°C) in 2015. The highest SUHI intensity was observed between the major urban area (Osogbo) and least developed towns. The continuous increase in the surface temperature of the environment due to the continuous variations in the land surface properties implies increased risk of heat-related environmental issues such as deterioration of thermal comfort conditions.

show abstract

“…Development of an area usually involves changes in the land cover and consequently, the climate of the area. Several studies have reported the impact of land use changes on the local climate and the thermal environment due to alteration of the land physical characteristics [1][2][3][4]. Uncontrolled and spontaneous urbanization with little or no regard for the thermal environment is an issue in most developing countries today.…”

Section: Introductionmentioning

confidence: 99%

Assessment of the bioclimatic conditions over some selected stations in Nigeria

2019

Self Cite

View full text Add to dashboard Cite

This study seeks to assess the bioclimatic conditions of some selected stations in Nigeria from 1981 to 2010 using meteorological data input from the Nigerian Meteorological Agency (NIMET). The specific objectives were to analyze the spatiotemporal variability of the key weather parameters critical to bioclimatic conditions, evaluate the monthly and seasonal variation of the bioclimatic conditions and analyze the spatiotemporal variation of the human bioclimatic conditions over the area. The study applied the use of two bioclimatic indices, namely physiological equivalent temperature (PET) and Universal Thermal Climate Index (UTCI). PET was computed using the RayMan model, while UTCI was computed using the Bioklima model. The bioclimatic conditions were observed to vary seasonally as thermal stress levels particularly increased in the months of March to May and these months correspond to the pre-wet period of the year. The conditions, however, improved during the wet and dry periods. The early hours of the day (0600 Local Standard Time) were characterized mostly by no thermal stress conditions; however, the northern regions were cooler than the other parts of the country. The frequency of thermal stress categories for each station also revealed the threshold of the thermal stress condition over each station. The result from this study provides useful bioclimatic information applicable in the development of adaptive strategies and efficient planning with respect to the thermal environment.

show abstract

Estimation of surface energy fluxes from remotely sensed data over Akure, Nigeria

Cited by 16 publications

References 30 publications

Effect of Phyisco-chemical Parameters on the Thermal Diffusivity and Soil Heat Flux over Ayadi, Ondo State, Nigeria

Effect of Phyisco-chemical Parameters on the Thermal Diffusivity and Soil Heat Flux over Ayadi, Ondo State, Nigeria

Investigation of the changing patterns of the land use land cover over Osogbo and its environs

Assessment of the bioclimatic conditions over some selected stations in Nigeria

Contact Info

Product

Resources

About