Pacific Decadal Oscillation (PDO)

The Pacific Decadal Oscillation (PDO) is often described as a long-lived El Niño-like pattern of Pacific climate variability (Zhang et al. 1997). As seen with the better-known El Niño/Southern Oscillation (ENSO), extremes in the PDO pattern are marked by widespread variations in the Pacific Basin and the North American climate. In parallel with the ENSO phenomenon, the extreme phases of the PDO have been classified as being either warm or cool, as defined by ocean temperature anomalies in the northeast and tropical Pacific Ocean. When SSTs are anomalously cool in the interior North Pacific and warm along the Pacific Coast, and when sea level pressures are below average over the North Pacific, the PDO has a positive value. When the climate anomaly patterns are reversed, with warm SST anomalies in the interior and cool SST anomalies along the North American coast, or above average sea level pressures over the North Pacific, the PDO has a negative value (Courtesy of Mantua, 1999).

The NCDC PDO index is based on NOAA's extended reconstruction of SSTs (ERSST Version 3). It is constructed by regressing the ERSST anomalies against the Mantua PDO index for their overlap period, to compute a PDO regression map for the North Pacific ERSST anomalies. The ERSST anomalies are then projected onto that map to compute the NCDC index. The NCDC PDO index closely follows the Mantua PDO index.

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Download: xml csv json
DatePDO
1854010.29
1854020.02
185403-0.12
185404-0.11
185405-0.10
1854060.11
185407-0.44
185408-0.89
185409-1.02
185410-1.38
185411-1.59
185412-1.32
1855010.16
1855020.37
1855030.54
185504-0.05
185505-0.57
185506-0.75
185507-0.71
185508-0.21
185509-0.46
1855100.10
1855110.37
1855120.92
1856011.07
1856021.25
1856030.80
1856040.21
185605-0.23
185606-0.09
185607-0.07
185608-0.47
185609-0.63
185610-0.31
1856110.18
1856120.18
185701-0.30
185702-0.70
185703-0.63
185704-0.24
1857050.77
1857061.36
1857071.19
1857081.32
1857090.60
1857100.62
1857110.82
1857120.55
1858010.15
185802-0.18
185803-0.57
185804-0.07
1858050.27
1858060.65
1858070.22
1858080.26
1858090.33
1858100.29
1858110.43
1858120.28
185901-0.14
185902-0.32
185903-0.90
185904-1.13
185905-1.06
185906-0.74
185907-0.78
185908-0.59
185909-0.77
185910-0.47
185911-0.39
185912-0.75
186001-0.82
186002-0.94
186003-1.05
186004-0.89
186005-0.62
186006-0.48
186007-0.70
186008-0.25
186009-0.27
186010-0.49
186011-0.79
186012-0.76
186101-0.69
186102-0.54
186103-0.52
186104-0.46
186105-0.48
186106-0.34
186107-0.38
186108-0.35
186109-0.42
186110-0.53
186111-0.56
186112-0.55
1862010.18
1862020.16
1862030.15
1862040.22
1862050.31
1862060.86
1862070.41
1862080.36
1862090.27
1862100.24
1862110.20
1862120.10
1863010.59
1863020.61
1863030.62
1863040.66
1863050.63
1863060.73
1863070.60
1863080.75
1863091.00
1863101.31
1863111.31
1863120.88
1864010.68
1864020.64
1864030.60
1864040.55
1864050.53
1864060.67
1864070.62
1864080.65
1864090.62
1864100.61
1864110.61
1864120.58
1865010.42
1865020.44
1865030.42
1865040.45
1865050.42
1865060.55
1865070.52
1865080.53
1865090.44
1865100.48
1865110.49
1865120.46
1866010.31
1866020.31
1866030.29
1866040.31
1866050.24
1866060.40
1866070.41
1866080.37
1866090.47
1866100.41
1866110.39
1866120.35
1867010.35
1867020.28
1867030.01
1867040.09
1867050.04
1867060.17
1867070.03
1867080.19
1867090.16
1867100.32
1867110.38
1867120.42
1868010.01
1868020.01
186803-0.01
1868040.02
186805-0.01
1868060.11
1868070.06
1868080.11
1868090.10
1868100.10
1868110.07
186812-0.07
186901-0.51
186902-0.37
186903-0.23
186904-0.05
186905-0.14
1869060.05
1869070.14
1869080.10
1869090.07
1869100.14
1869110.02
186912-0.24
187001-0.13
187002-0.38
187003-0.62
187004-0.60
187005-0.63
187006-0.26
187007-0.26
1870080.00
187009-0.27
187010-0.34
187011-0.37
187012-0.37
187101-0.15
187102-0.45
187103-0.40
187104-0.34
187105-0.33
187106-0.15
187107-0.29
187108-0.20
187109-0.26
187110-0.24
187111-0.26
187112-0.32
187201-0.20
187202-0.08
187203-0.24
187204-0.30
187205-0.31
187206-0.44
187207-0.39
187208-0.22
187209-0.55
187210-1.19
187211-1.27
187212-1.60
187301-1.58
187302-1.15
187303-0.59
187304-0.27
187305-0.20
1873060.01
187307-0.33
187308-0.72
187309-0.90
187310-0.61
187311-0.57
187312-0.55
187401-0.55
187402-0.27
1874030.01
1874040.04
187405-0.38
187406-0.57
187407-0.69
187408-0.59
187409-0.49
187410-0.27
187411-0.17
187412-0.11
187501-0.42
187502-0.65
187503-0.37
187504-0.16
187505-0.66
187506-1.09
187507-1.27
187508-0.95
187509-0.68
187510-0.39
187511-0.30
187512-0.30
187601-0.60
187602-0.52
187603-0.87
187604-1.24
187605-1.20
187606-0.75
187607-1.95
187608-2.35
187609-1.93
187610-1.34
187611-0.59
187612-0.67
187701-0.43
187702-0.33
187703-0.26
187704-0.27
187705-0.35
187706-0.17
187707-0.27
187708-0.05
187709-0.15
1877100.15
1877110.58
1877120.75
1878010.67
1878020.70
1878030.76
1878041.29
1878051.15
1878061.56
1878071.15
1878080.79
187809-1.39
187810-0.83
187811-0.02
1878120.31
1879010.08
1879020.05
1879030.34
1879040.82
187905-0.86
187906-0.45
187907-1.22
1879080.02
187909-0.20
1879100.25
187911-0.05
1879120.06
188001-0.25
188002-0.66
188003-0.97
188004-1.59
188005-2.62
188006-1.33
188007-1.47
188008-1.40
188009-1.28
188010-0.49
1880110.00
188012-0.21
188101-0.05
1881020.56
1881030.62
1881041.64
1881050.85
1881060.80
188107-0.44
188108-0.30
1881090.04
188110-0.17
1881110.69
188112-0.49
188201-1.80
188202-2.26
188203-2.62
188204-2.32
188205-1.22
188206-0.65
188207-0.96
188208-0.71
188209-1.18
188210-0.78
188211-0.47
1882120.44
188301-0.35
188302-1.20
188303-1.36
188304-0.62
188305-0.26
1883060.20
188307-1.26
188308-1.61
188309-1.64
188310-1.63
188311-1.00
188312-0.80
188401-1.09
188402-1.77
188403-1.66
188404-0.52
1884050.16
1884061.26
1884071.35
1884081.27
1884090.21
1884100.71
1884111.28
1884121.53
1885011.64
1885021.14
1885031.56
1885041.70
1885051.78
1885061.86
1885071.52
1885080.89
1885091.11
1885101.49
1885110.79
1885120.60
1886010.66
1886020.83
1886030.51
1886040.45
188605-0.17
188606-0.17
188607-0.37
188608-0.93
188609-0.76
188610-0.72
188611-0.46
1886120.18
1887010.14
1887020.22
1887030.12
1887040.01
188705-0.23
188706-0.26
188707-1.39
188708-1.81
188709-2.04
188710-1.52
188711-0.82
188712-0.45
188801-0.57
188802-0.45
188803-0.21
1888040.33
1888051.08
1888062.16
1888071.36
1888080.39
188809-0.42
188810-0.04
188811-0.09
188812-0.14
188901-0.04
1889020.07
1889030.23
1889040.72
1889050.82
1889060.86
1889070.03
188908-0.54
188909-0.63
188910-0.23
1889110.25
1889120.42
1890010.05
189002-0.08
189003-0.04
1890040.29
1890050.28
189006-0.06
189007-0.34
189008-0.57
189009-0.04
1890100.07
1890110.40
1890120.40
1891010.47
1891020.20
1891030.14
1891040.31
1891050.68
1891060.74
1891070.67
1891080.41
1891090.38
1891100.34
1891110.29
1891120.42
189201-0.14
189202-0.23
1892030.09
189204-0.05
189205-0.40
189206-0.72
189207-0.83
189208-1.20
189209-1.83
189210-2.09
189211-1.38
189212-0.65
189301-0.23
189302-0.26
189303-0.38
189304-0.44
189305-1.46
189306-1.61
189307-1.73
189308-1.35
189309-1.24
189310-1.35
189311-1.14
189312-0.95
189401-0.92
189402-1.28
189403-1.81
189404-1.98
189405-2.18
189406-2.08
189407-1.71
189408-1.78
189409-2.07
189410-2.56
189411-1.21
189412-0.77
189501-0.43
189502-0.18
189503-0.22
1895040.06
1895050.01
189506-0.10
189507-0.04
189508-0.16
189509-0.42
189510-0.44
189511-0.24
189512-0.04
1896010.67
1896020.82
1896030.70
189604-0.12
189605-0.52
189606-0.30
1896070.02
1896080.36
1896091.60
1896101.37
1896111.13
1896121.11
1897010.93
1897020.29
189703-0.10
189704-0.02
1897050.26
1897060.79
1897070.59
1897080.73
1897090.33
1897100.48
189711-0.20
1897120.03
1898010.42
1898020.05
1898030.14
189804-0.16
189805-0.55
189806-0.52
189807-0.40
1898080.25
1898090.10
189810-0.03
189811-0.30
189812-0.24
189901-0.35
189902-0.95
189903-0.90
189904-0.64
189905-0.75
189906-0.99
189907-1.25
189908-0.38
189909-0.17
189910-0.70
1899110.49
1899121.00
1900011.30
1900021.12
1900031.71
1900042.37
1900051.53
1900061.27
1900071.06
1900081.04
1900090.20
190010-0.15
1900110.31
1900120.68
1901010.96
1901020.42
1901030.22
190104-0.21
190105-0.82
190106-0.78
190107-1.25
190108-0.40
1901090.21
1901100.49
1901110.52
1901121.11
1902011.09
1902020.62
1902030.52
1902040.83
1902051.00
1902061.86
1902072.27
1902081.43
1902090.28
1902100.86
1902110.72
1902120.22
1903010.21
190302-0.01
190303-0.11
190304-0.84
1903050.01
190306-0.17
1903071.16
1903081.19
1903090.96
1903100.67
1903111.12
1903121.00
1904010.62
1904021.61
1904031.10
190404-0.33
190405-0.02
190406-0.54
190407-0.55
1904080.81
1904091.45
1904101.40
1904111.31
1904121.11
1905010.84
1905021.52
1905031.91
1905042.12
1905051.29
1905061.78
1905071.62
1905082.33
1905091.51
1905100.68
1905111.55
190512-0.05
1906010.94
1906021.41
1906030.50
1906040.37
1906051.33
1906062.26
1906072.13
1906080.74
190609-0.03
1906100.31
1906111.05
190612-0.35
190701-0.19
190702-0.19
190703-0.50
190704-0.81
1907050.22
1907061.24
1907071.27
190708-0.06
1907090.60
1907101.52
1907111.51
1907121.75
1908011.64
1908021.30
1908031.19
1908040.35
1908050.37
1908060.10
1908070.33
190808-1.27
1908090.06
1908100.30
1908111.39
1908121.26
1909010.87
1909020.81
1909030.88
1909040.16
190905-0.17
190906-0.89
190907-2.05
190908-2.18
190909-1.11
1909100.48
1909110.04
190912-0.99
191001-0.93
191002-0.58
191003-0.68
191004-0.77
191005-0.05
1910060.09
191007-0.08
1910080.23
1910090.43
191010-1.28
191011-0.53
191012-0.04
191101-0.51
191102-0.81
191103-0.36
191104-0.04
191105-0.41
191106-0.23
1911070.28
1911080.87
191109-0.59
191110-0.71
191111-0.48
191112-0.60
191201-0.43
191202-0.32
191203-0.57
191204-0.40
1912050.20
1912060.41
191207-0.19
1912080.32
1912090.80
1912100.50
1912110.46
1912120.22
191301-0.30
1913020.10
191303-0.27
191304-1.08
191305-0.17
1913060.35
1913070.86
1913081.41
1913090.72
1913100.30
1913110.76
1913120.54
1914010.04
1914020.15
1914030.31
1914041.09
1914050.21
191406-0.67
191407-0.78
191408-0.89
191409-0.85
191410-0.41
191411-0.15
1914120.22
191501-0.18
191502-0.29
1915030.43
1915041.15
1915051.49
1915061.72
1915071.22
1915080.64
191509-0.18
191510-1.02
191511-0.85
191512-0.36
191601-1.22
191602-1.27
191603-1.07
191604-0.51
191605-0.24
191606-1.12
191607-1.39
191608-1.82
191609-2.03
191610-1.61
191611-2.00
191612-2.15
191701-1.66
191702-1.51
191703-1.79
191704-1.68
191705-1.06
191706-0.60
191707-0.71
191708-0.91
191709-1.22
191710-1.45
191711-0.55
191712-0.37
1918010.44
191802-0.04
191803-0.70
191804-1.13
191805-1.11
191806-0.01
1918070.29
1918080.45
1918090.58
1918101.37
1918111.57
1918120.71
1919010.79
1919020.36
191903-0.13
191904-0.38
191905-0.68
191906-0.91
191907-1.49
191908-0.81
191909-0.04
1919100.04
191911-0.47
191912-0.21
192001-0.54
192002-0.68
192003-1.19
192004-1.23
192005-1.17
192006-1.09
192007-1.30
192008-2.10
192009-2.18
192010-1.28
192011-1.00
192012-0.71
192101-0.94
192102-1.38
192103-0.99
192104-1.49
192105-1.35
192106-0.45
192107-1.32
192108-1.63
192109-1.63
192110-1.25
192111-0.13
1921120.28
1922010.03
192202-0.86
192203-1.07
192204-1.17
192205-1.28
192206-0.68
192207-0.12
192208-0.63
192209-0.43
192210-0.39
192211-0.82
1922120.22
1923010.21
192302-0.60
192303-0.76
192304-0.33
192305-0.02
192306-0.17
1923070.30
1923080.23
1923090.11
1923100.49
1923110.17
192312-0.52
192401-0.66
192402-0.37
192403-0.40
192404-1.07
192405-0.50
192406-0.05
192407-0.83
192408-1.32
192409-1.28
192410-1.57
192411-0.90
192412-0.43
192501-0.95
192502-0.79
192503-0.81
192504-0.73
192505-0.45
192506-0.43
1925070.03
192508-0.08
1925090.32
1925100.19
1925110.11
1925120.49
1926011.12
1926021.32
1926031.35
1926041.68
1926051.95
1926061.87
1926071.80
1926081.52
1926091.33
1926101.77
1926112.19
1926121.63
1927010.95
1927020.95
1927030.57
1927040.25
192705-0.01
192706-0.03
192707-0.54
192708-0.99
192709-0.80
192710-0.76
192711-0.32
192712-0.42
1928010.22
1928020.53
1928030.66
1928040.09
1928050.36
1928060.81
192807-0.47
192808-0.80
192809-2.09
192810-1.14
1928110.19
1928120.60
1929010.65
192902-0.03
192903-0.15
192904-0.06
1929050.19
1929061.00
1929070.22
192908-0.20
1929090.63
1929100.75
1929110.57
1929121.20
1930010.74
1930020.37
193003-0.27
193004-0.11
193005-0.23
1930060.26
1930070.08
193008-0.37
193009-0.23
193010-0.47
193011-0.14
1930120.63
1931010.93
1931020.89
1931030.75
1931041.23
1931051.77
1931061.74
1931071.95
1931080.36
1931090.48
1931100.01
193111-0.41
193112-0.73
193201-1.36
193202-1.77
193203-1.07
193204-0.05
1932050.03
193206-0.18
193207-0.53
193208-0.69
193209-1.36
193210-0.01
193211-0.12
193212-0.15
193301-0.95
193302-1.03
193303-1.12
193304-0.89
193305-1.49
193306-1.72
193307-2.67
193308-2.68
193309-2.67
193310-1.62
193311-0.09
193312-0.70
193401-0.39
1934020.07
1934030.77
1934041.22
1934050.64
193406-0.04
1934070.20
1934081.20
1934090.95
1934101.67
1934111.65
1934121.32
1935010.72
1935020.14
193503-0.33
193504-0.01
1935050.68
1935061.54
1935070.61
1935080.36
1935090.17
1935100.21
1935110.36
1935121.50
1936011.73
1936021.34
1936031.06
1936040.95
1936051.46
1936062.39
1936072.70
1936081.75
1936090.88
1936101.85
1936112.52
1936121.13
193701-0.23
193702-0.66
193703-0.47
193704-0.86
193705-0.43
1937061.31
193707-0.41
193708-1.02
193709-0.47
1937100.22
1937110.36
1937120.47
1938010.97
193802-0.18
193803-0.85
193804-0.25
193805-0.68
193806-0.39
193807-0.43
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1941032.67
1941042.42
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1941063.04
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1941083.11
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1942040.75
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1958061.50
1958070.55
1958081.10
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1959030.00
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1968060.22
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1969060.88
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