Updated Arctic Ocean Oscillation Index (AOO)
The AOO is non-dimensional: x1.E-6 (ssh difference (cm) between closed SSH isolines in the BG region divided by distance between these isolines (cm). Positive AOO index corresponds to anticyclonic circulation and a negative index corresponds to cyclonic circulation.
| Year | AOO Index |
|---|---|
| 1946. | 5.00 |
| 1947. | 3.33 |
| 1948. | 2.50 |
| 1949. | 2.38 |
| 1950. | 2.78 |
| 1951. | 2.86 |
| 1952. | 2.00 |
| 1953. | -3.89 |
| 1954. | -2.78 |
| 1955. | -1.25 |
| 1956. | -2.86 |
| 1957. | -2.00 |
| 1958. | 1.33 |
| 1959. | 1.25 |
| 1960. | 3.33 |
| 1961. | 2.59 |
| 1962. | 1.43 |
| 1963. | -1.33 |
| 1964. | -1.25 |
| 1965. | -1.33 |
| 1966. | -0.83 |
| 1967. | -1.67 |
| 1968. | -2.00 |
| 1969. | -1.67 |
| 1970. | -1.85 |
| 1971. | -1.25 |
| 1972. | 2.22 |
| 1973. | 3.33 |
| 1974. | 1.67 |
| 1975. | 2.00 |
| 1976. | 2.22 |
| 1977. | 3.33 |
| 1978. | 1.67 |
| 1979. | 2.00 |
| 1980. | -1.67 |
| 1981. | -1.11 |
| 1982. | -1.67 |
| 1983. | -1.67 |
| 1984. | -2.00 |
| 1985. | 2.38 |
| 1986. | 2.22 |
| 1987. | 2.86 |
| 1988. | 2.22 |
| 1989. | -5.00 |
| 1990. | -1.90 |
| 1991. | -2.38 |
| 1992. | -1.67 |
| 1993. | -0.33 |
| 1994. | -3.33 |
| 1995. | -1.67 |
| 1996. | -2.33 |
| 1997. | 0.57 |
| 1998. | 2.50 |
| 1999. | 1.79 |
| 2000. | 0.83 |
| 2001. | 1.52 |
| 2002. | 0.62 |
| 2003. | 0.83 |
| 2004. | 1.67 |
| 2005. | 1.52 |
| 2006. | 0.95 |
| 2007. | 3.39 |
| 2008. | 1.88 |
| 2009. | 1.39 |
| 2010. | 1.00 |
| 2011. | 1.04 |
| 2012. | 0.83 |
| 2013. | 1.11 |
| 2014. | 1.54 |
| 2015. | 1.44 |
| 2016. | 1.89 |
| 2017. | 0.38 |
| 2018. | 0.83 |
| 2019. | 1.25 |
| 2020. | 0.42 |
| 2021. | 0.83 |
| 2022. | 1.67 |
| 2023. | 1.11 |
| 2024. | 1.25 |
Updated 1946-2024 AOO index