Table of
  1. T
  2. KAPLAN Indices WP SST anomaly avOS
Additional Information

TimeSST anomaly
months since 1960-01-01degreeC
Jan 1856-0.3530985
Feb 1856-0.3131559
Mar 1856-0.1997093
Apr 1856-0.108537
May 1856-0.1112964
Jun 1856-0.1507413
Jul 1856-0.1640175
Aug 1856-0.1971227
Sep 1856-0.1612011
Oct 1856-0.2680921
Nov 1856-0.1878634
Dec 1856-0.2697411
Jan 1857-0.3063208
Feb 1857-0.2331379
Mar 1857-0.1931964
Apr 1857-0.1471823
May 1857-0.1471672
Jun 1857-0.1229572
Jul 1857-0.2582346
Aug 1857-0.3416905
Sep 1857-0.07283134
Oct 1857-0.06535182
Nov 1857-0.1550514
Dec 1857-0.1815916
Jan 1858-0.2004505
Feb 1858-0.2168955
Mar 1858-0.197769
Apr 1858-0.1767496
May 1858-0.163551
Jun 1858-0.1183252
Jul 1858-8.0903625E-04
Aug 1858-0.2813653
Sep 1858-0.4568532
Oct 1858-0.3059475
Nov 1858-0.1309434
Dec 1858-0.3694461
Jan 1859-0.3325723
Feb 1859-0.2006436
Mar 1859-0.2058991
Apr 1859-0.08960614
May 1859-0.04889165
Jun 1859-0.0810181
Jul 1859-0.1726044
Aug 1859-0.2217952
Sep 1859-0.2394968
Oct 1859-0.1670323
Nov 1859-0.2046993
Dec 1859-0.04795611
Jan 1860-0.08225249
Feb 1860-0.003032451
Mar 1860-0.09960271
Apr 1860-0.1671936
May 1860-0.381078
Jun 1860-0.3195778
Jul 1860-0.1593944
Aug 1860-0.2562365
Sep 1860-0.3053754
Oct 1860-0.462937
Nov 1860-0.4818868
Dec 1860-0.5409185
Jan 1861-0.7622079
Feb 1861-1.277493
Mar 1861-0.7172003
Apr 1861-0.4650348
May 1861-0.3616678
Jun 1861-0.3113296
Jul 1861-0.2095641
Aug 1861-0.2770804
Sep 1861-0.1577408
Oct 1861-0.1819762
Nov 1861-0.1798743
Dec 1861-0.3265763
Jan 1862-0.4417729
Feb 1862-0.2748559
Mar 1862-0.08231144
Apr 1862-0.03767179
May 1862-0.07783782
Jun 1862-0.2567052
Jul 1862-0.1278357
Aug 1862-0.1137732
Sep 18620.0265898
Oct 1862-0.05732523
Nov 1862-0.09425662
Dec 1862-0.227137
Jan 1863-0.3955167
Feb 1863-0.3326233
Mar 1863-0.4023891
Apr 1863-0.3181591
May 1863-0.3526866
Jun 1863-0.3341867
Jul 1863-0.4019033
Aug 1863-0.2032653
Sep 1863-0.2391437
Oct 1863-0.3328018
Nov 1863-0.320319
Dec 1863-0.3212332
Jan 1864-0.4849502
Feb 1864-0.6802015
Mar 1864-0.4566855
Apr 1864-0.2728957
May 1864-0.1822204
Jun 1864-0.1052055
Jul 1864-0.1507357
Aug 1864-0.2779086
Sep 1864-0.2799341
Oct 1864-0.2600355
Nov 1864-0.07992882
Dec 1864-0.07490612
Jan 1865-0.1333054
Feb 1865-0.2129746
Mar 1865-0.3401436
Apr 1865-0.1365332
May 18650.1585116
Jun 18650.05498725
Jul 18650.1319788
Aug 18650.2116885
Sep 18650.07089757
Oct 1865-0.01835468
Nov 18650.09877694
Dec 1865-0.05611752
Jan 1866-0.09353131
Feb 1866-0.2767635
Mar 1866-0.3297761
Apr 1866-0.2581157
May 1866-0.1685471
Jun 1866-0.185028
Jul 1866-0.2657177
Aug 1866-0.3947242
Sep 1866-0.2476103
Oct 1866-0.2017187
Nov 1866-0.201351
Dec 1866-0.2793464
Jan 1867-0.2007899
Feb 1867-0.06400605
Mar 1867-0.03817161
Apr 1867-0.1914075
May 1867-0.07168981
Jun 1867-0.07016294
Jul 1867-0.03556341
Aug 18670.07853513
Sep 1867-0.08004789
Oct 1867-0.1382792
Nov 1867-0.2098233
Dec 1867-0.2114833
Jan 1868-0.1710211
Feb 1868-0.1264758
Mar 1868-0.06212563
Apr 1868-0.08016626
May 1868-0.05610503
Jun 1868-0.1780086
Jul 1868-0.2267334
Aug 18680.03366098
Sep 18680.1610503
Oct 1868-0.05974861
Nov 1868-0.1159962
Dec 1868-0.285327
Jan 1869-0.3627135
Feb 1869-0.1714655
Mar 18690.07911394
Apr 18690.3771683
May 18690.454849
Jun 18690.0597511
Jul 1869-0.09936597
Aug 1869-0.1324443
Sep 1869-0.08244216
Oct 1869-0.07642003
Nov 1869-0.08934027
Dec 1869-0.1130328
Jan 1870-0.03304638
Feb 1870-0.1365925
Mar 1870-0.5076952
Apr 1870-0.3508893
May 1870-0.2731543
Jun 1870-0.2581537
Jul 1870-0.2828253
Aug 1870-0.2776931
Sep 1870-0.1913758
Oct 1870-0.187954
Nov 1870-0.2435299
Dec 1870-0.1239594
Jan 18710.007071554
Feb 1871-0.09714679
Mar 1871-0.1702214
Apr 1871-0.3291712
May 1871-0.166625
Jun 1871-0.07068044
Jul 1871-0.1312571
Aug 1871-0.1831647
Sep 1871-0.2423843
Oct 1871-0.1231957
Nov 18710.03763165
Dec 18710.1466104
Jan 1872-0.006903747
Feb 18720.03049358
Mar 1872-0.1745513
Apr 1872-0.1801163
May 1872-0.1837839
Jun 1872-0.2369534
Jul 18720.01892328
Aug 18720.3990426
Sep 18720.01503305
Oct 1872-0.1724671
Nov 1872-0.084565
Dec 1872-0.06432907
Jan 18730.08895833
Feb 1873-0.06541965
Mar 1873-0.2036229
Apr 1873-0.1195302
May 1873-0.1134576
Jun 1873-0.05786392
Jul 18730.1321352
Aug 18730.2008853
Sep 18730.1209675
Oct 1873-0.008353848
Nov 1873-0.1579879
Dec 1873-0.1430666
Jan 1874-0.1861844
Feb 1874-0.1389313
Mar 1874-0.1076114
Apr 1874-0.08747005
May 18740.09055285
Jun 18740.02874725
Jul 18740.06226902
Aug 18740.05229988
Sep 18740.002459277
Oct 1874-0.08943368
Nov 18740.07469374
Dec 1874-0.1192247
Jan 1875-0.2472746
Feb 1875-0.2592401
Mar 1875-0.3859152
Apr 1875-0.4235319
May 1875-0.2352028
Jun 1875-0.05180834
Jul 1875-0.08089837
Aug 1875-0.1611339
Sep 1875-0.0754248
Oct 18750.02461497
Nov 18750.05908575
Dec 18750.1101962
Jan 18760.1629343
Feb 18760.1057737
Mar 18760.08811252
Apr 18760.01125513
May 1876-0.1724613
Jun 1876-0.1944418
Jul 1876-0.1119005
Aug 1876-0.2568407
Sep 1876-0.1949382
Oct 18760.04575564
Nov 18760.04495037
Dec 1876-0.03051446
Jan 1877-0.06574798
Feb 18770.1115361
Mar 18770.06364761
Apr 18770.1899311
May 1877-0.06553635
Jun 1877-0.129072
Jul 1877-0.2386752
Aug 18770.08001752
Sep 18770.3312612
Oct 18770.076192
Nov 18770.04602039
Dec 18770.1211507
Jan 18780.02853608
Feb 18780.05000747
Mar 1878-0.09296214
Apr 1878-0.05547317
May 18780.05552827
Jun 18780.0904514
Jul 18780.05996232
Aug 1878-0.1129422
Sep 18780.05520667
Oct 1878-0.06764111
Nov 1878-0.1036063
Dec 18780.02341803
Jan 18790.09139527
Feb 18790.2017009
Mar 18790.07121117
Apr 18790.02389252
May 18790.0188942
Jun 18790.2707889
Jul 18790.3760508
Aug 18790.311118
Sep 18790.2515696
Oct 18790.002852157
Nov 1879-0.08284289
Dec 18790.04729411
Jan 18800.06193655
Feb 18800.1116716
Mar 18800.02894
Apr 1880-0.2807643
May 1880-0.2138164
Jun 1880-0.2248561
Jul 1880-0.318356
Aug 1880-0.1246455
Sep 1880-0.1842979
Oct 1880-0.2148388
Nov 1880-0.08647389
Dec 18800.1063735
Jan 18810.1026294
Feb 18810.04813638
Mar 1881-0.1069943
Apr 1881-0.05914891
May 1881-0.02081029
Jun 1881-0.03327334
Jul 18810.03650197
Aug 18810.02846531
Sep 1881-0.09656339
Oct 1881-0.3244442
Nov 1881-0.2322795
Dec 1881-0.1491052
Jan 1882-0.1601998
Feb 1882-0.1517822
Mar 18820.08252588
Apr 18820.06357867
May 1882-0.1999783
Jun 1882-0.07617931
Jul 18820.2081394
Aug 18820.1852983
Sep 18820.03558168
Oct 1882-0.06793573
Nov 1882-0.02320405
Dec 1882-0.1365144
Jan 18830.01401212
Feb 18830.0280872
Mar 1883-0.05590579
Apr 1883-0.142264
May 1883-0.1497938
Jun 1883-0.2270319
Jul 1883-0.101124
Aug 18830.06308895
Sep 18830.2570163
Oct 18830.09746251
Nov 18830.09608012
Dec 1883-0.003030043
Jan 1884-0.189616
Feb 1884-0.02602781
Mar 18840.04782613
Apr 18840.1494539
May 18840.2918959
Jun 18840.2030625
Jul 18840.2231807
Aug 18840.08899557
Sep 1884-0.07227904
Oct 1884-0.2496166
Nov 1884-0.2022619
Dec 1884-0.1404045
Jan 1885-0.03900033
Feb 1885-0.01200113
Mar 1885-0.1440873
Apr 1885-0.2299297
May 1885-0.2555037
Jun 1885-0.3557241
Jul 1885-0.2921752
Aug 1885-0.4167698
Sep 1885-0.4128473
Oct 1885-0.3625273
Nov 1885-0.1159758
Dec 18850.1242458
Jan 18860.02855012
Feb 18860.1462954
Mar 18860.1267432
Apr 18860.08476481
May 18860.2458332
Jun 18860.4122509
Jul 18860.0950755
Aug 18860.159449
Sep 18860.1344275
Oct 1886-0.2552885
Nov 1886-0.04063478
Dec 1886-0.06448094
Jan 1887-0.03005215
Feb 1887-0.1620441
Mar 1887-0.2202193
Apr 1887-0.1918706
May 1887-0.2617617
Jun 1887-0.1407794
Jul 18870.03180746
Aug 18870.01742629
Sep 18870.1839791
Oct 18870.2531152
Nov 18870.1713151
Dec 18870.150366
Jan 1888-0.07320954
Feb 1888-0.1945569
Mar 1888-0.1657534
Apr 1888-0.1584391
May 1888-0.1408322
Jun 1888-0.1551098
Jul 1888-0.08314949
Aug 1888-0.1403448
Sep 1888-0.1753804
Oct 1888-0.3172514
Nov 1888-0.3428901
Dec 1888-0.2213391
Jan 1889-0.2388664
Feb 1889-0.2555333
Mar 1889-0.2245506
Apr 1889-0.1121096
May 1889-0.1409257
Jun 18890.08163492
Jul 18890.1490446
Aug 18890.2564579
Sep 18890.298927
Oct 18890.1601879
Nov 1889-0.01595053
Dec 18890.06941673
Jan 18900.0945935
Feb 18900.182874
Mar 18900.07919436
Apr 18900.008534837
May 1890-0.09495259
Jun 18900.002473103
Jul 18900.01812022
Aug 18900.08284039
Sep 1890-0.03947319
Oct 18900.06691832
Nov 18900.09097254
Dec 18900.1080451
Jan 18910.04295333
Feb 18910.005492568
Mar 1891-0.05662561
Apr 1891-0.01218074
May 18910.005837436
Jun 1891-0.1058686
Jul 1891-0.1501985
Aug 1891-0.2170288
Sep 1891-0.03177231
Oct 18910.03544971
Nov 1891-0.03882718
Dec 1891-0.1084128
Jan 18920.04604308
Feb 18920.03532778
Mar 18920.008101329
Apr 1892-0.2178863
May 1892-0.2092311
Jun 1892-0.1973117
Jul 1892-0.0890862
Aug 18920.1895838
Sep 18920.2353389
Oct 18920.1889773
Nov 18920.1668614
Dec 1892-0.02249742
Jan 18930.08541203
Feb 18930.1392732
Mar 18930.08666037
Apr 18930.05928039
May 1893-0.007497346
Jun 18930.07024054
Jul 18930.2133747
Aug 18930.2776964
Sep 1893-0.05881476
Oct 1893-0.1176192
Nov 1893-0.1056948
Dec 18930.01057454
Jan 1894-0.04267494
Feb 1894-0.1019548
Mar 1894-0.2848076
Apr 1894-0.3399762
May 1894-0.3441514
Jun 1894-0.0884659
Jul 1894-0.08501747
Aug 1894-0.01341797
Sep 18940.07202397
Oct 18940.1050653
Nov 18940.1554334
Dec 18940.06642022
Jan 18950.2015762
Feb 18950.07107132
Mar 18950.03312135
Apr 18956.9455702E-05
May 18950.06784756
Jun 1895-0.05556602
Jul 1895-0.01705889
Aug 1895-0.03354863
Sep 1895-0.1296499
Oct 1895-0.2679474
Nov 1895-0.04322951
Dec 1895-0.02726646
Jan 1896-0.1140174
Feb 1896-0.1304263
Mar 1896-0.06256101
Apr 1896-0.03662081
May 1896-0.0438069
Jun 1896-0.04894017
Jul 1896-0.1151697
Aug 1896-0.2396287
Sep 1896-0.2405888
Oct 1896-0.2080256
Nov 1896-0.02640041
Dec 18960.02798699
Jan 1897-0.08708282
Feb 1897-0.1555799
Mar 1897-0.07368534
Apr 1897-0.06317193
May 1897-0.1605836
Jun 1897-0.0478014
Jul 18970.03280985
Aug 18970.2009144
Sep 18970.297965
Oct 18970.4174912
Nov 18970.3791586
Dec 18970.3659791
Jan 18980.2483403
Feb 18980.1995199
Mar 18980.03054092
Apr 1898-0.2061025
May 1898-0.3546229
Jun 1898-0.3308178
Jul 1898-0.5520213
Aug 1898-0.5217614
Sep 1898-0.4237781
Oct 1898-0.2375768
Nov 1898-0.2549928
Dec 1898-0.3623203
Jan 1899-0.2431548
Feb 1899-0.2252975
Mar 1899-0.110494
Apr 1899-0.05309223
May 1899-0.1470132
Jun 1899-0.2330621
Jul 1899-0.208171
Aug 1899-0.4257166
Sep 1899-0.3749014
Oct 1899-0.1711244
Nov 1899-0.1372992
Dec 1899-0.2605241
Jan 1900-0.258547
Feb 1900-0.1191471
Mar 1900-0.1715712
Apr 1900-0.0447908
May 1900-0.06845199
Jun 19000.0737952
Jul 19000.1862951
Aug 19000.1666295
Sep 19000.2091033
Oct 19000.2105485
Nov 19000.1286087
Dec 19000.1411263
Jan 19010.1657549
Feb 19010.2224371
Mar 19010.3529245
Apr 19010.3178224
May 19010.2734986
Jun 19010.187965
Jul 19010.11476
Aug 19010.1388787
Sep 19010.06315676
Oct 19010.04140819
Nov 1901-0.1021591
Dec 1901-0.08789007
Jan 19020.0255765
Feb 19020.0209762
Mar 1902-0.1248661
Apr 1902-0.08756711
May 1902-0.1797062
Jun 1902-0.3497846
Jul 1902-0.3537411
Aug 1902-0.3779109
Sep 1902-0.4995408
Oct 1902-0.4441478
Nov 1902-0.2927671
Dec 1902-0.2207665
Jan 1903-0.04256107
Feb 1903-0.05322164
Mar 1903-0.1016721
Apr 1903-0.04039433
May 1903-0.05022218
Jun 1903-0.09001055
Jul 19030.07423586
Aug 19030.1656708
Sep 19030.06864122
Oct 19030.07804397
Nov 19030.0460596
Dec 1903-0.01303954
Jan 1904-0.03077655
Feb 1904-0.151025
Mar 1904-0.01318674
Apr 1904-0.2681726
May 1904-0.4226696
Jun 1904-0.4096113
Jul 1904-0.3976133
Aug 1904-0.3535911
Sep 1904-0.1709259
Oct 19040.01369152
Nov 1904-0.1017207
Dec 1904-0.2383434
Jan 1905-0.3228733
Feb 1905-0.5340995
Mar 1905-0.4192677
Apr 1905-0.1792886
May 1905-0.2747019
Jun 1905-0.0933633
Jul 1905-0.4210461
Aug 1905-0.3534535
Sep 1905-0.3858215
Oct 1905-0.2082111
Nov 1905-0.3185615
Dec 1905-0.129535
Jan 1906-0.113186
Feb 1906-0.2499696
Mar 1906-0.3166958
Apr 1906-0.2270768
May 1906-0.2530989
Jun 1906-0.2211154
Jul 19060.03015336
Aug 19060.2262489
Sep 19060.1520547
Oct 19060.1961625
Nov 1906-0.04718315
Dec 1906-0.153965
Jan 1907-0.2314681
Feb 1907-0.245871
Mar 1907-0.172795
Apr 1907-0.3071319
May 1907-0.2854572
Jun 19070.012527
Jul 19070.1104433
Aug 1907-0.07598154
Sep 1907-0.3009956
Oct 19070.05012966
Nov 19070.254016
Dec 19070.1846698
Jan 19080.1675334
Feb 19080.2155087
Mar 19080.03225257
Apr 19080.08829078
May 1908-0.09315485
Jun 1908-0.3070896
Jul 1908-0.2350791
Aug 1908-0.1857939
Sep 1908-0.1542168
Oct 1908-0.02954032
Nov 1908-0.0305231
Dec 1908-0.1118057
Jan 19090.1260659
Feb 1909-0.06823322
Mar 1909-0.4193075
Apr 1909-0.3226649
May 1909-0.2795231
Jun 1909-0.1392026
Jul 19090.0268581
Aug 1909-0.205338
Sep 1909-0.1427085
Oct 1909-0.1075478
Nov 1909-0.1034317
Dec 1909-0.2431003
Jan 1910-0.07899611
Feb 1910-0.1059696
Mar 1910-0.3278539
Apr 1910-0.3126396
May 1910-0.2836633
Jun 1910-0.3282289
Jul 1910-0.003135575
Aug 19100.1312166
Sep 1910-0.05451139
Oct 1910-0.0393748
Nov 1910-0.1204842
Dec 1910-0.3388537
Jan 1911-0.2858624
Feb 1911-0.2186256
Mar 1911-0.1753644
Apr 1911-0.2283828
May 1911-0.4708546
Jun 1911-0.3933622
Jul 1911-0.6682041
Aug 1911-0.7284774
Sep 1911-0.5201043
Oct 1911-0.4953749
Nov 1911-0.5397611
Dec 1911-0.2936173
Jan 1912-0.547531
Feb 1912-0.3244018
Mar 1912-0.3666864
Apr 1912-0.231062
May 1912-0.3439583
Jun 1912-0.2163524
Jul 19120.09881445
Aug 19120.12156
Sep 19120.07074386
Oct 19120.1730049
Nov 1912-0.02982124
Dec 1912-0.02121878
Jan 1913-0.2394683
Feb 1913-0.262632
Mar 1913-0.2199116
Apr 1913-0.2905632
May 1913-0.4389763
Jun 1913-0.2507979
Jul 1913-0.3995524
Aug 1913-0.3926397
Sep 1913-0.6816487
Oct 1913-0.5849977
Nov 1913-0.3360863
Dec 1913-0.2610195
Jan 1914-0.1494962
Feb 19140.005333669
Mar 1914-0.151039
Apr 1914-0.0154264
May 1914-0.2407032
Jun 1914-0.3314254
Jul 1914-0.4065387
Aug 1914-0.3373564
Sep 1914-0.4412625
Oct 1914-0.4568406
Nov 1914-0.4217161
Dec 1914-0.1145345
Jan 1915-0.1791696
Feb 1915-0.1519033
Mar 1915-0.2770615
Apr 1915-0.3122546
May 1915-0.4283101
Jun 1915-0.2209322
Jul 1915-0.07917526
Aug 1915-0.08538313
Sep 1915-0.1088443
Oct 1915-0.2738995
Nov 1915-0.1239344
Dec 19150.03908497
Jan 19160.03560431
Feb 1916-0.01838508
Mar 19160.06421982
Apr 1916-0.1281811
May 1916-0.1893145
Jun 1916-0.2741849
Jul 19160.08279993
Aug 19160.1347041
Sep 1916-0.1667223
Oct 1916-0.1816678
Nov 1916-0.228414
Dec 19160.02124435
Jan 1917-0.05060663
Feb 1917-0.02329348
Mar 1917-0.1945378
Apr 1917-0.3837385
May 1917-0.5056889
Jun 1917-0.4700387
Jul 1917-0.2881455
Aug 1917-0.2807514
Sep 1917-0.3047148
Oct 1917-0.2207566
Nov 1917-0.2093664
Dec 1917-0.2469753
Jan 1918-0.182882
Feb 1918-0.1978137
Mar 1918-0.2391851
Apr 1918-0.327098
May 1918-0.487616
Jun 1918-0.4673838
Jul 1918-0.4690961
Aug 1918-0.4138705
Sep 1918-0.3504063
Oct 1918-0.4787505
Nov 1918-0.4628867
Dec 1918-0.5868502
Jan 1919-0.5574354
Feb 1919-0.3792801
Mar 1919-0.2094907
Apr 1919-0.2050027
May 1919-0.1154416
Jun 1919-0.3779302
Jul 1919-0.4495347
Aug 1919-0.5570379
Sep 1919-0.4941054
Oct 1919-0.389585
Nov 1919-0.3385175
Dec 1919-0.223368
Jan 1920-0.1866781
Feb 1920-0.3254759
Mar 1920-0.2931883
Apr 1920-0.2303812
May 1920-0.2317235
Jun 1920-0.1905853
Jul 1920-0.3496571
Aug 1920-0.2299092
Sep 1920-0.2263569
Oct 1920-0.3104474
Nov 1920-0.4253491
Dec 1920-0.5054213
Jan 1921-0.3050561
Feb 1921-0.1301873
Mar 1921-0.2134586
Apr 1921-0.3893626
May 1921-0.5314456
Jun 1921-0.3737488
Jul 1921-0.2077544
Aug 1921-0.2556903
Sep 1921-0.3124212
Oct 1921-0.195984
Nov 1921-0.08691595
Dec 1921-0.1167915
Jan 1922-0.04448662
Feb 1922-0.07927942
Mar 1922-0.2173515
Apr 1922-0.1761005
May 1922-0.288738
Jun 1922-0.3575593
Jul 1922-0.2906758
Aug 1922-0.2431922
Sep 1922-0.1433827
Oct 1922-0.009351512
Nov 19220.001802896
Dec 19220.02551778
Jan 19230.09926432
Feb 1923-0.08716675
Mar 1923-0.2996324
Apr 1923-0.3775089
May 1923-0.0919503
Jun 1923-0.4010177
Jul 1923-0.6811629
Aug 1923-0.6094444
Sep 1923-0.7436573
Oct 1923-0.5078644
Nov 1923-0.3222347
Dec 1923-0.201763
Jan 1924-0.3073775
Feb 1924-0.2799678
Mar 1924-0.4119942
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