Global Effects of ENSO
Temperature and Precipitation
Because the relationship between ENSO and global temperature and precipitation
patterns is complex, it is useful to look at it in different ways.
Schematic Global Views
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These maps show a schematic view of the typical
influence of El Niño and La Niña on seasonal temperature
and precipitation:
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Probability Maps
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These maps show the probability of above-, below-,
or near-average seasonal temperature or precipitation during El
Niño or La Niña events. The maps are based on observed
values of rainfall and precipitation over several past events. The
interface allows you to choose the season, type of ENSO event (El
Niño or La Niña), variable (precipitation or temperature),
and region. There are more detailed explanations below the selection
interface.
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Precipitation Probability
Maps - Station Data
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These maps show the probability of above-, below-, or
near-normal seasonal precipitation during El Niño or La Niña
events. The plots are similar to the probability maps above, but are
calculated for station data over a different period.
El Niño Precipitation Probabilities
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La Niña Precipitation Probabilities
|
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Time series
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These maps allow you to click on any location you
desire to view the time series of temperature and precipitation.
These time series show how these quantities have varied during past
El Niño and La Niña events.
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Composites
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These plots, which are called 'composites', show
the average effect of El Niño or La Niña on precipitation.
They are made by taking the average of the precipitation from several El
Niño or La Niña events.
|
Specific Events
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These plots show the departures of precipitation from the 1961-1990 average during specific El Niño
and La Niña events. You can view the plots a year at a time,
or view an animation of all years. When you look at the plots a year at
a time, you can click on the image to bring up a menu that allows you to
zoom (using the controls at the side of the plot) on particular regions.
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El Niño
|
Season
|
Years Included |
| Dec-Jan-Feb |
1957-58,
1965-66,
1968-69,
1969-70,
1972-73,
1982-83,
1986-87,
1991-92,
1994-95,
1997-98,
Animate
|
| Mar-Apr-May |
1958,
1969,
1982,
1983,
1987,
1991,
1992,
1993,
1997,
1998,
Animate
|
| Jun-Jul-Aug |
1957,
1963,
1965,
1972,
1982,
1986,
1987,
1991,
1997,
Animate
|
| Sep-Oct-Nov |
1957,
1963,
1965,
1972,
1982,
1986,
1987,
1991,
1994,
1997,
Animate
|
La Niña
|
Season |
Years Included |
| Dec-Jan-Feb |
1949-50,
1955-56,
1967-68,
1970-71,
1973-74,
1975-76,
1984-85,
1988-89,
Animate
|
| Mar-Apr-May |
1950,
1956,
1964,
1971,
1973,
1974,
1975,
1988,
1989,
Animate
|
| Jun-Jul-Aug |
1950,
1954,
1955,
1956,
1964,
1970,
1973,
1975,
1988,
Animate
|
| Sep-Oct-Nov |
1950,
1955,
1956,
1964,
1970,
1973,
1975,
1988,
1998,
Animate
|
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