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Urban-Rural Temperature and Diurnal Temperature Range (DTR) in Delta State, Nigeria

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Eyefia O. A., Efe S. I., Atuma I. M.
World News of Natural Sciences
|
2023
|
vol. 50
130-146
EN
The study examined urban-rural temperature and Diurnal Temperature Range (DTR) in Delta State, Nigeria with the aid of the ex-post facto research design. Monthly temperature and DTR data were collected from the 5° × 5° grid point via google earth employing the Cruts 4.06 and Crutem 4-2019-12 grid boxes. One-way analysis of variance (ANOVA), Paired t-test, and Mann-Kendall test were employed to establish the variation and trend in temperature and DTR in urban–rural areas of Delta State. In the same vein, the Tukey HSD Multiple Comparisons were used to determine where the significant variation lies. The study indicates that Delta state has an annual temperature of 26.9 °C and a DTR of 8.4 °C. The results also showed an urban bias of 0.2 °C in temperature and 0.4 °C in DTR in the urban-rural canopies, which confirmed the concept of urban heat islands and their negative impacts on DTR. The study confirmed that that a significant difference exists in annual temperature between urban and rural areas of Delta State. The outcomes of the study indicate that a significant difference exists in annual DTR between the urban and rural areas in Delta State. That the annual mean temperature and DTR between the urban and rural areas differ significantly. Therefore, the study recommends that urban planners adhered to planning regulations and the green roof city approach.
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