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Evidence of climate variability from rainfall and temperature fluctuations in semi-arid region of the tropics

机译：从热带半干旱地区降雨和温度波动的气候变异性证据

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摘要

The pattern of rainfall and temperature behaviour in the Hadejia River Basin (HRB) has been assessed. The behaviour of rainfall and temperature have been used as proxies in detecting the presence of climate variability. Historical rainfall and temperature monthly data spanning thirty-six years (1980-2015) obtained from the Nigerian Meteorological Agency (NIMET) was used in this study. ANOVA and Mann-Kendall trend test was used for the data analysis. The ANOVA results showed significant variation in rainfall, maximum and minimum temperature between the stations. The Mann-Kendall trend test result shows an increasing trend in both rainfall and temperature in annual statistics, though statistically insignificant. However, the monthly trends result showed mixed results of both significant and insignificant as well as increasing and decreasing trends. The mean, standard deviation and the coefficient of variation were spatially interpolated using inverse distance weightage technique for easy comprehension. Even though the annual increasing trends result was statistically insignificant except for two out of the ten stations, it is still crucial for planning water-related activities and programs considering the sensitivity and fragility of the region to minor climatic variations.
机译：评估了Hadejia河流域（HRB）的降雨量和温度行为模式。降雨和温度的行为已被用作检测气候变异性存在的代理。本研究使用了从尼日利亚气象学局（NIMET）中获得的三十六年（1980-2015）的历史降雨量和温度月度数据。 ANOVA和MANN-KENDALL趋势测试用于数据分析。 ANOVA结果显示出在站之间的降雨，最大和最小温度的显着变化。 Mann-Kendall趋势试验结果表明，在年度统计数据中降雨量和温度的趋势越来越大，但统计上微不足道。然而，每月趋势结果表明，显着和微不足道的混合结果以及增加和降低趋势。使用逆距离重量技术来易于理解，平均值，标准偏差和变化系数。尽管年增长率的趋势结果是统计上微不足道的，但除了十个站中的两个，仍然对规划水有关的活动和考虑该地区的敏感性和脆弱性的计划至关重要。

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