Correlation analysis of temperature and rainfall

When the rainfall was correlated against the temperature on the basis of the six geo-political zones (refer to Table 38.3), the results of the correlation coefficients are as presented in Table 38.4.

Table 38.3 Summary of average rainfall and temperature variations in Nigeria (1971-2003). ____

Year

AVRfall

AvMxTp

AvMnTp

AvTP

1971

105.6816

32.24316

20.58701

26.41508

1972

101.4489

32.58167

20.94658

26.76413

1973

87.23662

33.33338

21.4432

27.38829

1974

129.6859

31.54399

20.40155

25.97277

1975

117.2148

32.08727

20.96188

26.52458

1976

123.0084

31.82155

21.38619

26.60387

1977

265.827

32.17625

21.25547

26.71586

1978

134.8733

31.80759

21.11623

26.46191

1979

131.7137

32.08383

21.43744

26.76063

1980

128.6203

32.13945

21.5118

26.82562

1981

115.1485

31.96624

21.20101

26.58363

1982

117.2709

31.63429

21.13824

26.38626

1983

100.4001

32.30803

21.74502

27.02653

1984

105.8013

32.37619

21.50636

26.94128

1985

115.6764

32.08798

21.62686

26.85742

1986

108.9178

32.07368

21.57288

26.82328

1987

108.117

32.99266

22.00327

27.49797

1988

134.1874

32.16349

21.86823

27.01586

1989

121.391

31.87779

20.9181

26.39795

1990

120.0189

32.53531

21.93756

27.23644

1991

130.9435

32.08429

21.98338

27.03384

1992

116.8451

31.96757

21.37686

26.67221

1993

125.2546

31.9999

21.56633

26.78312

1994

116.9129

32.59916

21.78698

27.19307

1995

132.0527

32.56329

21.6333

27.09829

1996

122.0929

33.10353

22.21658

27.66006

1997

129.8261

32.46584

21.57914

27.02249

1998

117.5948

33.04568

22.11288

27.57928

1999

135.9347

32.5367

21.92083

27.22876

2000

131.2478

32.45771

21.68301

27.07036

2001

353.2994

32.97443

22.40049

27.68746

2002

117.5228

32.9501

22.2391

27.5946

2003

145.0544

32.83385

23.14399

27.98892

Average

131.7219

32.34594

21.58205

26.96399

Table 38.4 Correlation results of the average rainfall against temperature for the geo-political zones.

Geo-political zones

Correlation coefficient

North central

-0.408

Northeast

-0.039

Northwest

0.055

Southeast

-0.481

South-South

0.018

Southwest

0.116

The correlation analysis across the six geo-political zones, which represent the whole of the Nigerian federation (please refer to Table 38.3), yielded a value of 0.199.

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