ENSO response
Composite (average) atmospheric variables associated with 9 El Nino and 9 La Nina events from 1948 to the present. Events are defined for winter(Nov-Mar) and summer (May-Sep). Anomalies are defined as the difference from the 1968-1996 means (1971-2000 for the climate division data). Options are available for comparing El Nino to La Nina, anomalies to means and winter to summer. Set your browser window as wide as possible to view plots side-by-side.
![bullet](https://webarchive.library.unt.edu/eot2008/20080916134752im_/http://www.cdc.noaa.gov/images/purpleball.gif)
How ENSO events
differ.
![bullet](https://webarchive.library.unt.edu/eot2008/20080916134752im_/http://www.cdc.noaa.gov/images/purpleball.gif)
How composites
vary throughout a season.
![bullet](https://webarchive.library.unt.edu/eot2008/20080916134752im_/http://www.cdc.noaa.gov/images/purpleball.gif)
Further
details and directions for this page.
Years that define events
Winter | Summer |
El Nino | La Nina |
---|
1982-83 | 1954-55 |
1991-92 | 1955-56 |
1997-98 | 1970-71 |
1957-58 | 1973-74 |
1986-87 | 1975-76 |
1972-73 | 1988-89 |
1965-66 | 1998-99 |
1968-69 | 1964-65 |
2002-03 | 1999-00 |
|
El Nino | La Nina |
---|
1965 | 1950 |
1972 | 1955 |
1982 | 1956 |
1987 | 1964 |
1991 | 1971 |
1993 | 1974 |
1994 | 1988 |
1997 | 1999 |
2002 | 1998 |
|