Research Article
Recent Changes of Some Observed Climate Extreme Events in Kano
Table 1
Summary of the temperature and rainfall indices used in the study: Tn and Tx are daily minimum and maximum temperature, respectively.
| Element | Index | Descriptive name | Definition | Units |
| Rainfall | PRCPTOT | Annual total rainfall | Annual total PRCP in wet days (RR ≥ 1 mm) | Mm | Rainfall | RX5day | Maximum 5-day precipitation | Maximum 5-day precipitation | Mm | Rainfall | CWD | Consecutive wet days | Maximum number of consecutive wet days | Days | Rainfall | R99p | Extremely wet days | Annual total PRCP when RR >99th percentile | Mm | Tn | Tn10p | Cool night frequency | Percentage of days with TN <10th percentile of 1960–2007 | % | Tn | Tn90p | Warm night frequency | Percentage of days with TN >90th percentile of 1960–2007 | % | Tx | Tx10p | Cool day frequency | Percentage of days with TX <10th percentile of 1960–2007 | % | Tx | Tx90p | Warm day frequency | Percentage of days with TX >90th percentile of 1960–2007 | % | Tx | WSDI | Warm spells | Annual count of days with at least 6 consecutive days with TX >90th percentile of 1960–2007 | Days |
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