Methodology 3821 Data used

The data used for the study cover an average of 30 years and it was collected from the Nigerian Institute of Meteorological Agency (NimetAg). It includes daily maximum and minimum temperatures, rainfall, and relative humidity of the affected localities. The study area covers the six geo-political zones of the country viz, southwest (SW), northwest (NW), southeast (SE), northeast (NE), south-south (SS), and north central (NC).

A total of 16 states of the Nigerian federation were covered in the study. The duration of study was 30 years on the average. Table 38.1 gives the summary of the analogy. The discrepancy in the duration of the data as against the period of coverage specified is informed by the missing data of some years. Figure 38.1

is the current map of Nigeria, showing some of the locations covered by the study in thick circles.

Table 38.1 Study area locations, population, and duration.

N

Study areas

Geographical location

Latitude (°N)

Longitude (°E)

Population

Duration of study (Years)

Missing data (%)

1

Benin

South-south

6.33

5.63

3,218,332

1971-2002 (32)

0.0

2

Ibadan

Southwest

7.38

3.90

5,591,589

1971-2003 (33)

0.0

3

Lokoja

North central

7.80

6.73

3,278,487

1971-2002 (31)

3.1

4

Oshogbo

Southwest

7.83

4.58

3,423,535

1971-2003 (33)

0.0

5

Bauchi

Northeast

10.31

9.84

4,676,465

1971-2002 (24)

25.0

6

Maiduguri

Northeast

11.85

13.16

4,151,193

1971-2000(30)

0.0

7

Nguru (Yobe)

Northeast

12.88

10.45

2,321,591

1971-2002 (28)

12.5

8

Warri

South-south

5.52

5.75

4,098,391

1971-2003 (33)

0.0

9

Ikeja

Southwest

6.45

3.47

9,013,534

1971-2002 (30)

6.3

10

Port Harcourt

South-south

4.78

7.00

5,185,400

1971-2002 (28)

12.5

11

Sokoto

Northwest

13.07

5.24

3,696,999

1971-2003 (33)

0.0

12

Owerri

Southeast

5.50

7.02

3,934,899

1974-2003 (28)

6.7

13

Calabar

South-south

4.96

8.3 1

2,888,966

1971-2002 (31)

3.1

14

Kano

northwest

12.00

8.52

9,383,682

1971-2000 (27)

10.0

15

Jos

North Central

9.93

8.89

3,178,712

1971-2000 (30)

0.0

16

Yola

northeast

10.6

7.22

3,168,101

1971-2000 (29)

3.3

Average - - - - 1971-2003(30)

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