Year
|
B2000
|
NOAA CDR
|
B & R
|
Mar/Apr (pre-satellite)
|
Mar/Apr (satellite)
|
Mar/Apr (13-year mean)
|
Lower diff
|
Mar/Apr (lower bound)
|
Upper dif
|
Mar/Apr (upper bound)
|
conf int
|
Lower limit
|
AVG
|
Upper limit
|
Jun sat
|
Jun (satellite)
|
Jun (linear trend)
|
Mar/Apr (linear trend)
|
1922
|
33.76
|
|
33.76
|
-1.91
|
|
|
-4.2681
|
|
0.4401
|
|
2.3541
|
31.41
|
33.76
|
36.12
|
|
|
|
|
1923
|
38.49
|
|
38.49
|
2.81
|
|
|
0.4163
|
|
5.2123
|
|
2.398
|
36.09
|
38.49
|
40.89
|
|
|
|
|
1924
|
37.5
|
|
37.5
|
1.82
|
|
|
-0.4837
|
|
4.1252
|
|
2.3044
|
35.19
|
37.5
|
39.8
|
|
|
|
|
1925
|
34.01
|
|
34.01
|
-1.67
|
|
|
-3.999
|
|
0.6648
|
|
2.3319
|
31.68
|
34.01
|
36.34
|
|
|
|
|
1926
|
37.97
|
|
37.97
|
2.3
|
|
|
-0.1178
|
|
4.7131
|
|
2.4155
|
35.56
|
37.97
|
40.39
|
|
|
|
|
1927
|
36.78
|
|
36.78
|
1.1
|
|
|
-1.2164
|
|
3.4177
|
|
2.317
|
34.46
|
36.78
|
39.09
|
|
|
|
|
1928
|
40.06
|
|
40.06
|
4.38
|
|
1.2712
|
1.8923
|
-1.0894
|
6.8722
|
3.6318
|
2.49
|
37.57
|
40.06
|
42.55
|
|
|
|
|
1929
|
38.71
|
|
38.71
|
3.04
|
|
1.4761
|
0.6262
|
-0.8796
|
5.4474
|
3.8317
|
2.4106
|
36.3
|
38.71
|
41.12
|
|
|
|
|
1930
|
35.67
|
|
35.67
|
0.0
|
|
1.3574
|
-2.3103
|
-0.9921
|
2.3075
|
3.707
|
2.3089
|
33.37
|
35.67
|
37.98
|
|
|
|
|
1931
|
37.65
|
|
37.65
|
1.98
|
|
1.2214
|
-0.3859
|
-1.1269
|
4.3379
|
3.5696
|
2.3619
|
35.29
|
37.65
|
40.01
|
|
|
|
|
1932
|
36.58
|
|
36.58
|
0.91
|
|
1.2188
|
-1.396
|
-1.1275
|
3.2072
|
3.565
|
2.3016
|
34.28
|
36.58
|
38.88
|
|
|
|
|
1933
|
36.11
|
|
36.11
|
0.44
|
|
1.1126
|
-1.8772
|
-1.2239
|
2.7488
|
3.4492
|
2.313
|
33.8
|
36.11
|
38.42
|
|
|
|
|
1934
|
37.01
|
|
37.01
|
1.34
|
|
1.1458
|
-1.0424
|
-1.1892
|
3.7187
|
3.4808
|
2.3805
|
34.63
|
37.01
|
39.39
|
|
|
|
|
1935
|
36.43
|
|
36.43
|
0.75
|
|
0.9616
|
-1.5414
|
-1.3656
|
3.04
|
3.2888
|
2.2907
|
34.13
|
36.43
|
38.72
|
|
|
|
|
1936
|
36.95
|
|
36.95
|
1.27
|
|
0.8901
|
-1.0458
|
-1.4341
|
3.5901
|
3.2143
|
2.3179
|
34.63
|
36.95
|
39.27
|
|
|
|
|
1937
|
35.73
|
|
35.73
|
0.05
|
|
0.8665
|
-2.2356
|
-1.4573
|
2.34
|
3.1903
|
2.2878
|
33.44
|
35.73
|
38.02
|
|
|
|
|
1938
|
33.98
|
|
33.98
|
-1.7
|
|
0.6871
|
-4.007
|
-1.6324
|
0.605
|
3.0067
|
2.306
|
31.67
|
33.98
|
36.28
|
|
|
|
|
1939
|
36.59
|
|
36.59
|
0.92
|
|
0.6818
|
-1.3716
|
-1.6401
|
3.2072
|
3.0036
|
2.2894
|
34.3
|
36.59
|
38.88
|
|
|
|
|
1940
|
37.21
|
|
37.21
|
1.53
|
|
0.6642
|
-0.7656
|
-1.6587
|
3.8289
|
2.987
|
2.2972
|
34.91
|
37.21
|
39.5
|
|
|
|
|
1941
|
37.66
|
|
37.66
|
1.99
|
|
0.5223
|
-0.4001
|
-1.795
|
4.3758
|
2.8397
|
2.3879
|
35.28
|
37.66
|
40.05
|
|
|
|
|
1942
|
37.78
|
|
37.78
|
2.11
|
|
0.6342
|
-0.2639
|
-1.6855
|
4.479
|
2.9538
|
2.3714
|
35.41
|
37.78
|
40.16
|
|
|
|
|
1943
|
35.37
|
|
35.37
|
-0.31
|
|
0.6328
|
-2.6128
|
-1.6857
|
1.995
|
2.9512
|
2.3039
|
33.06
|
35.37
|
37.67
|
|
|
|
|
1944
|
35.32
|
|
35.32
|
-0.36
|
|
0.6713
|
-2.6624
|
-1.6481
|
1.9518
|
2.9908
|
2.3071
|
33.01
|
35.32
|
37.63
|
|
|
|
|
1945
|
36.51
|
|
36.51
|
0.84
|
|
0.7456
|
-1.4954
|
-1.5809
|
3.1672
|
3.0722
|
2.3313
|
34.18
|
36.51
|
38.84
|
|
|
|
|
1946
|
35.88
|
|
35.88
|
0.21
|
|
0.9617
|
-2.1189
|
-1.3729
|
2.5327
|
3.2962
|
2.3258
|
33.56
|
35.88
|
38.21
|
|
|
|
|
1947
|
35.17
|
|
35.17
|
-0.51
|
|
0.8131
|
-2.8147
|
-1.5212
|
1.8033
|
3.1474
|
2.309
|
32.86
|
35.17
|
37.48
|
|
|
|
|
1948
|
37.88
|
|
37.88
|
2.2
|
|
0.878
|
-0.1177
|
-1.4523
|
4.5237
|
3.2083
|
2.3207
|
35.56
|
37.88
|
40.2
|
|
|
|
|
1949
|
36.93
|
|
36.93
|
1.25
|
|
0.8862
|
-1.048
|
-1.44
|
3.5557
|
3.2123
|
2.3018
|
34.63
|
36.93
|
39.23
|
|
|
|
|
1950
|
36.23
|
|
36.23
|
0.55
|
|
1.225
|
-1.7479
|
-1.1066
|
2.8551
|
3.5566
|
2.3015
|
33.93
|
36.23
|
38.53
|
|
|
|
|
1951
|
34.94
|
|
34.94
|
-0.73
|
|
1.423
|
-3.1326
|
-0.9116
|
1.6629
|
3.7576
|
2.3978
|
32.54
|
34.94
|
37.34
|
|
|
|
|
1952
|
39.4
|
|
39.4
|
3.73
|
|
1.4683
|
1.3325
|
-0.8666
|
6.1193
|
3.8033
|
2.3934
|
37.01
|
39.4
|
41.8
|
|
|
|
|
1953
|
35.28
|
|
35.28
|
-0.4
|
|
1.5878
|
-2.6942
|
-0.7457
|
1.8941
|
3.9213
|
2.2942
|
32.98
|
35.28
|
37.57
|
|
|
|
|
1954
|
38.51
|
|
38.51
|
2.83
|
|
1.8953
|
0.4966
|
-0.4418
|
5.1687
|
4.2325
|
2.336
|
36.17
|
38.51
|
40.84
|
|
|
|
|
1955
|
37.89
|
|
37.89
|
2.21
|
|
1.5949
|
-0.104
|
-0.7423
|
4.5301
|
3.9322
|
2.317
|
35.57
|
37.89
|
40.21
|
|
|
|
|
1956
|
39.77
|
|
39.77
|
4.1
|
|
1.4295
|
1.7214
|
-0.91
|
6.4707
|
3.769
|
2.3747
|
37.4
|
39.77
|
42.15
|
|
|
|
|
1957
|
37.89
|
|
37.89
|
2.22
|
|
1.4905
|
-0.1283
|
-0.8502
|
4.5657
|
3.8312
|
2.347
|
35.55
|
37.89
|
40.24
|
|
|
|
|
1958
|
37.1
|
|
37.1
|
1.43
|
|
1.8234
|
-0.9105
|
-0.5165
|
3.7613
|
4.1633
|
2.3359
|
34.77
|
37.1
|
39.44
|
|
|
|
|
1959
|
37.44
|
|
37.44
|
1.76
|
|
1.7015
|
-0.5468
|
-0.6319
|
4.0658
|
4.0348
|
2.3063
|
35.13
|
37.44
|
39.74
|
|
|
|
|
1960
|
39.17
|
|
39.17
|
3.49
|
|
1.6878
|
1.1355
|
-0.6463
|
5.8498
|
4.022
|
2.3572
|
36.81
|
39.17
|
41.53
|
|
|
|
|
1961
|
33.97
|
|
33.97
|
-1.7
|
|
1.6433
|
-4.0241
|
-0.6353
|
0.6188
|
3.9218
|
2.3215
|
31.65
|
33.97
|
36.29
|
|
|
|
|
1962
|
34.78
|
|
34.78
|
-0.9
|
|
1.2461
|
-3.2274
|
-1.0207
|
1.4345
|
3.5129
|
2.331
|
32.45
|
34.78
|
37.11
|
|
|
|
|
1963
|
37.02
|
|
37.02
|
1.35
|
|
0.9576
|
-0.9708
|
-1.309
|
3.6638
|
3.2241
|
2.3173
|
34.71
|
37.02
|
39.34
|
|
|
|
|
1964
|
39.27
|
|
39.27
|
3.59
|
|
0.9467
|
1.2061
|
-1.2517
|
5.9803
|
3.1452
|
2.3871
|
36.88
|
39.27
|
41.66
|
|
|
|
|
1965
|
37.82
|
|
37.82
|
2.14
|
|
0.9767
|
-0.1683
|
-1.1386
|
4.449
|
3.0919
|
2.3086
|
35.51
|
37.82
|
40.13
|
|
|
|
|
1966
|
35.1
|
|
35.1
|
-0.58
|
|
0.8723
|
-2.8818
|
-1.175
|
1.7271
|
2.9196
|
2.3044
|
32.79
|
35.1
|
37.4
|
|
|
|
|
1967
|
35.64
|
37.93
|
37.93
|
|
2.2534
|
0.6097
|
0.64
|
-1.3511
|
3.8669
|
2.5706
|
1.6134
|
36.32
|
37.93
|
39.54
|
14.37
|
3.7507
|
2.0325
|
0.9639
|
1968
|
34.51
|
32.73
|
32.73
|
|
-2.9496
|
0.6951
|
-5.1135
|
-1.1907
|
-0.7856
|
2.5809
|
2.164
|
30.56
|
32.73
|
34.89
|
7.95
|
-2.6643
|
1.91
|
0.9156
|
1969
|
39.77
|
36.02
|
36.02
|
|
0.3449
|
0.8157
|
-2.0267
|
-0.9744
|
2.7166
|
2.6058
|
2.3716
|
33.65
|
36.02
|
38.39
|
|
|
1.7875
|
0.8673
|
1970
|
37.32
|
37.75
|
37.75
|
|
2.0775
|
0.7082
|
0.6158
|
-1.0396
|
3.5391
|
2.456
|
1.4617
|
36.29
|
37.75
|
39.22
|
12.51
|
1.8942
|
1.665
|
0.819
|
1971
|
38.14
|
37.49
|
37.49
|
|
1.8144
|
0.4091
|
0.5603
|
-1.236
|
3.0686
|
2.0542
|
1.2542
|
36.24
|
37.49
|
38.74
|
9.98
|
-0.6419
|
1.5425
|
0.7707
|
1972
|
37.3
|
36.08
|
36.08
|
|
0.4029
|
0.3349
|
-1.0196
|
-1.2398
|
1.8255
|
1.9097
|
1.4225
|
34.66
|
36.08
|
37.5
|
11.17
|
0.5576
|
1.42
|
0.7224
|
1973
|
33.97
|
35.76
|
35.76
|
|
0.0794
|
0.6356
|
-1.1546
|
-0.864
|
1.3135
|
2.1352
|
1.234
|
34.52
|
35.76
|
36.99
|
12.11
|
1.4883
|
1.2975
|
0.6741
|
1974
|
35.89
|
35.08
|
35.08
|
|
-0.5931
|
0.6414
|
-1.9393
|
-0.879
|
0.7532
|
2.1618
|
1.3462
|
33.74
|
35.08
|
36.43
|
11.64
|
1.0201
|
1.175
|
0.6258
|
1975
|
35.58
|
36.35
|
36.35
|
|
0.6714
|
1.0474
|
-0.4147
|
-0.479
|
1.7576
|
2.5737
|
1.0862
|
35.26
|
36.35
|
37.43
|
11.08
|
0.4618
|
1.0525
|
0.5775
|
1976
|
36.97
|
35.63
|
35.63
|
|
-0.0511
|
1.0521
|
-1.8186
|
-0.3828
|
1.7165
|
2.487
|
1.7675
|
33.86
|
35.63
|
37.39
|
13.89
|
3.2765
|
0.93
|
0.5292
|
1977
|
33.96
|
35.38
|
35.38
|
|
-0.2946
|
0.8513
|
-1.3465
|
-0.563
|
0.7574
|
2.2657
|
1.0519
|
34.33
|
35.38
|
36.43
|
11.76
|
1.1428
|
0.8075
|
0.4809
|
1978
|
36.23
|
36.85
|
36.85
|
|
1.1755
|
0.7156
|
-0.2186
|
-0.6761
|
2.5695
|
2.1074
|
1.394
|
35.46
|
36.85
|
38.25
|
14.97
|
4.3544
|
0.685
|
0.4326
|
1979
|
38.8
|
39.01
|
39.01
|
|
3.3315
|
0.8874
|
2.004
|
-0.4715
|
4.6589
|
2.2463
|
1.3274
|
37.68
|
39.01
|
40.33
|
12.15
|
1.5348
|
0.5625
|
0.3843
|
1980
|
37.03
|
38.01
|
38.01
|
|
2.329
|
0.8309
|
0.445
|
-0.5133
|
4.2129
|
2.1751
|
1.8839
|
36.12
|
38.01
|
39.89
|
10.9
|
0.2831
|
0.44
|
0.336
|
1981
|
33.83
|
38.0
|
38.0
|
|
2.3279
|
0.992
|
0.0862
|
-0.3356
|
4.5697
|
2.3196
|
2.2417
|
35.76
|
38.0
|
40.25
|
13.42
|
2.8028
|
0.3175
|
0.2877
|
1982
|
37.17
|
36.08
|
36.08
|
|
0.4065
|
0.8367
|
-0.7756
|
-0.527
|
1.5885
|
2.2003
|
1.182
|
34.9
|
36.08
|
37.26
|
9.08
|
-1.5372
|
0.195
|
0.2394
|
1983
|
33.64
|
35.14
|
35.14
|
|
-0.5326
|
0.7263
|
-1.7271
|
-0.589
|
0.662
|
2.0417
|
1.1946
|
33.95
|
35.14
|
36.34
|
10.35
|
-0.2649
|
0.0725
|
0.1911
|
1984
|
36.56
|
35.73
|
35.73
|
|
0.0504
|
0.507
|
-0.9103
|
-0.7985
|
1.0112
|
1.8125
|
0.9608
|
34.77
|
35.73
|
36.69
|
8.45
|
-2.1651
|
-0.05
|
0.1428
|
1985
|
37.83
|
38.31
|
38.31
|
|
2.6359
|
0.2798
|
1.6406
|
-0.9957
|
3.6313
|
1.5554
|
0.9953
|
37.32
|
38.31
|
39.31
|
13.41
|
2.7927
|
-0.1725
|
0.0945
|
1986
|
35.65
|
35.02
|
35.02
|
|
-0.6556
|
-0.1386
|
-1.6987
|
-1.4213
|
0.3876
|
1.1441
|
1.0431
|
33.98
|
35.02
|
36.06
|
11.03
|
0.4127
|
-0.295
|
0.0462
|
1987
|
37.64
|
37.18
|
37.18
|
|
1.5019
|
-0.45
|
0.3718
|
-1.6971
|
2.6321
|
0.7972
|
1.1301
|
36.05
|
37.18
|
38.31
|
12.16
|
1.5381
|
-0.4175
|
-0.0021
|
1988
|
34.77
|
34.33
|
34.33
|
|
-1.3481
|
-0.7224
|
-2.9031
|
-1.9234
|
0.207
|
0.4787
|
1.5551
|
32.77
|
34.33
|
35.88
|
8.06
|
-2.5593
|
-0.54
|
-0.0504
|
1989
|
35.05
|
34.19
|
34.19
|
|
-1.4856
|
-0.7687
|
-2.6252
|
-2.0157
|
-0.3459
|
0.4782
|
1.1396
|
33.05
|
34.19
|
35.33
|
9.19
|
-1.4313
|
-0.6625
|
-0.0987
|
1990
|
31.75
|
32.53
|
32.53
|
|
-3.1456
|
-0.6004
|
-4.0696
|
-1.8814
|
-2.2215
|
0.6806
|
0.924
|
31.61
|
32.53
|
33.45
|
7.17
|
-3.4466
|
-0.785
|
-0.147
|
1991
|
34.0
|
33.9
|
33.9
|
|
-1.7781
|
-0.666
|
-2.7826
|
-1.9898
|
-0.7735
|
0.6578
|
1.0046
|
32.89
|
33.9
|
34.9
|
10.64
|
0.0231
|
-0.9075
|
-0.1953
|
1992
|
|
33.57
|
33.57
|
|
-2.1081
|
-0.8429
|
-3.528
|
-2.232
|
-0.6881
|
0.5463
|
1.4199
|
32.15
|
33.57
|
34.99
|
10.26
|
-0.3561
|
-1.03
|
-0.2436
|
1993
|
|
33.96
|
33.96
|
|
-1.7191
|
-0.8788
|
-3.1413
|
-2.2609
|
-0.2968
|
0.5033
|
1.4222
|
32.53
|
33.96
|
35.38
|
7.91
|
-2.704
|
-1.1525
|
-0.2919
|
1994
|
|
34.46
|
34.46
|
|
-1.2131
|
-1.1231
|
-2.8551
|
-2.5494
|
0.429
|
0.3032
|
1.642
|
32.82
|
34.46
|
36.11
|
9.0
|
-1.6203
|
-1.275
|
-0.3402
|
1995
|
|
35.48
|
35.48
|
|
-0.1966
|
-1.0962
|
-1.9753
|
-2.5
|
1.5822
|
0.3076
|
1.7787
|
33.7
|
35.48
|
37.26
|
9.48
|
-1.1358
|
-1.3975
|
-0.3885
|
1996
|
|
37.33
|
37.33
|
|
1.656
|
-1.1274
|
0.0185
|
-2.5254
|
3.2934
|
0.2706
|
1.6374
|
35.69
|
37.33
|
38.97
|
11.25
|
0.6376
|
-1.52
|
-0.4368
|
1997
|
|
34.87
|
34.87
|
|
-0.8026
|
-0.8505
|
-2.3194
|
-2.2757
|
0.7143
|
0.5748
|
1.5168
|
33.36
|
34.87
|
36.39
|
10.11
|
-0.5108
|
-1.6425
|
-0.4851
|
1998
|
|
36.01
|
36.01
|
|
0.3369
|
-0.8706
|
-1.5087
|
-2.314
|
2.1826
|
0.5728
|
1.8457
|
34.17
|
36.01
|
37.86
|
9.48
|
-1.136
|
-1.765
|
-0.5334
|
1999
|
|
34.55
|
34.55
|
|
-1.1231
|
-0.767
|
-2.0744
|
-2.1973
|
-0.1717
|
0.6633
|
0.9513
|
33.6
|
34.55
|
35.5
|
8.7
|
-1.919
|
-1.8875
|
-0.5817
|
2000
|
|
34.0
|
34.0
|
|
-1.6736
|
-0.6742
|
-3.378
|
-2.0923
|
0.0309
|
0.744
|
1.7045
|
32.3
|
34.0
|
35.71
|
9.72
|
-0.8982
|
-2.01
|
-0.63
|
2001
|
|
34.68
|
34.68
|
|
-0.9981
|
-0.7378
|
-2.2607
|
-2.1267
|
0.2646
|
0.651
|
1.2626
|
33.42
|
34.68
|
35.94
|
8.75
|
-1.8709
|
-2.1325
|
-0.6783
|
2002
|
|
33.78
|
33.78
|
|
-1.8921
|
-0.915
|
-2.956
|
-2.2711
|
-0.8281
|
0.441
|
1.064
|
32.72
|
33.78
|
34.85
|
9.23
|
-1.3922
|
-2.255
|
-0.7266
|
2003
|
|
36.13
|
36.13
|
|
0.455
|
-1.1523
|
-0.8237
|
-2.4787
|
1.7337
|
0.1742
|
1.2787
|
34.85
|
36.13
|
37.41
|
10.25
|
-0.367
|
-2.3775
|
-0.7749
|
2004
|
|
33.64
|
33.64
|
|
-2.0399
|
-1.1852
|
-3.2801
|
-2.4947
|
-0.7997
|
0.1242
|
1.2402
|
32.4
|
33.64
|
34.88
|
9.76
|
-0.8618
|
-2.5
|
-0.8232
|
2005
|
|
34.92
|
34.92
|
|
-0.7609
|
-1.1978
|
-2.0107
|
-2.464
|
0.4888
|
0.0685
|
1.2497
|
33.67
|
34.92
|
36.16
|
9.07
|
-1.5517
|
-2.6225
|
-0.8715
|
2006
|
|
35.16
|
35.16
|
|
-0.5125
|
-1.218
|
-1.7766
|
-2.5088
|
0.7516
|
0.0728
|
1.2641
|
33.9
|
35.16
|
36.43
|
8.41
|
-2.2111
|
-2.745
|
-0.9198
|
2007
|
|
33.64
|
33.64
|
|
-2.0406
|
-0.9772
|
-3.3015
|
-2.1368
|
-0.7796
|
0.1825
|
1.261
|
32.37
|
33.64
|
34.9
|
8.38
|
-2.2398
|
-2.8675
|
-0.9681
|
2008
|
|
33.18
|
33.18
|
|
-2.5
|
-0.915
|
-3.8527
|
-2.2711
|
-1.1473
|
0.441
|
1.3527
|
31.82
|
33.18
|
34.53
|
6.69
|
-3.9292
|
-2.99
|
-1.0164
|
2009
|
|
34.25
|
34.25
|
|
-1.4285
|
-1.1523
|
-2.6807
|
-2.4787
|
-0.1762
|
0.1742
|
1.2522
|
33.0
|
34.25
|
35.5
|
7.13
|
-3.4912
|
-3.1125
|
-1.0647
|
2010
|
|
34.45
|
34.45
|
|
-1.231
|
-1.1852
|
-2.5266
|
-2.4947
|
0.0646
|
0.1242
|
1.2956
|
33.15
|
34.45
|
35.74
|
6.02
|
-4.5986
|
-3.235
|
-1.113
|
2011
|
|
35.85
|
35.85
|
|
0.1741
|
-1.1978
|
-1.1107
|
-2.464
|
1.4588
|
0.0685
|
1.2847
|
34.57
|
35.85
|
37.13
|
6.05
|
-4.5719
|
-3.3575
|
-1.1613
|
2012
|
|
34.29
|
34.29
|
|
-1.3861
|
-1.218
|
-2.6557
|
-2.5088
|
-0.1164
|
0.0728
|
1.2697
|
33.02
|
34.29
|
35.56
|
4.92
|
-5.6956
|
-3.48
|
-1.2096
|
2013
|
|
|
37.13
|
|
1.4574
|
-0.9772
|
1.4574
|
-2.1368
|
1.4574
|
0.1825
|
|
35.86
|
37.13
|
38.4
|
6.01
|
-4.6035
|
-3.6025
|
-1.2579
|