Mean number of days per season (November - March 1948 through 2006) in which precipitation exceeded
0.50 inches for Neutral years (top). Lower left map is the difference in this quantity
between El Niņo years and Neutral years. Lower right map is the difference in this
quantity between La Niņa years and Neutral years. Data are analyzed on a 2.5o latitude
x 2.5o longitude grid. Note that the Neutral year composite includes weak ENSO years.
Mean seasonal snowfall (November - March 1948 through 2006) in inches for Neutral years
(top). Lower left map is the difference in snowfall between El Niņo years and Neutral
years. Lower right map is the difference in snowfall between La Niņa years and Neutral
years. Data are analyzed on a 2.5o latitude x 2.5o longitude grid.
Note that the Neutral year composite includes weak ENSO years.
Mean number of days per season (November - March 1948 through 2006) with 2 inch daily
snowfalls (or greater) for Neutral years (top). Difference in number of days between
Neutral years and moderate to strong El Niņo years (lower left). Lower right panel
similar to lower left, except for La Niņa years. Data are analyzed on a 2.5o latitude
x 2.5o longitude grid. Note that the Neutral year composite includes weak ENSO years.
Mean number of days per season (December - February 1948 through 2006) in which maximum
daily temperature is at least 5o C above the daily climatological mean
value (top). Difference in number of days between Neutral years and moderate
to strong El Niņo years (lower left). Lower right panel similar to lower left, except for
La Niņa years. Data are analyzed on a 2.5o latitude
x 2.5o longitude grid. Daily climatology (1948-1993) is a
7-day running mean. Note that the Neutral year composite includes weak ENSO years.
Mean number of days per season (December - February 1948 through 2006) in which maximum
daily temperature is at least 5o C below the daily climatological mean
value (top). Difference in number of days between Neutral years and moderate
to strong El Niņo years (lower left). Lower right panel similar to lower left, except for
La Niņa years. Data are analyzed on a 2.5o latitude
x 2.5o longitude grid. Daily climatology (1948-1993) is a
7-day running mean to smooth out variations caused by the relatively short base period.
Note that the Neutral year composite includes weak ENSO years.
Mean number of days per season (December - February 1948 through 2006) in which minimum
daily temperature is at least 5o C above the daily climatological mean
value (top). Difference in number of days between Neutral years and moderate
to strong El Niņo years (lower left). Lower right panel similar to lower left, except for
La Niņa years. Data are analyzed on a 2.5o latitude
x 2.5o longitude grid. Daily climatology (1948-1993) is a
7-day running mean. Note that the Neutral year composite includes weak ENSO years.
Mean number of days per season (December - February 1948 through 2006) in which minimum
daily temperature is at least 5o C below the daily climatological mean
value (top). Difference in number of days between Neutral years and moderate
to strong El Niņo years (lower left). Lower right panel similar to lower left, except for
La Niņa years. Data are analyzed on a 2.5o latitude
x 2.5o longitude grid. Daily climatology (1948-1993) is a
7-day running mean. Note that the Neutral year composite includes weak ENSO years.
Mean number of days per season (December - February 1948 through 2006) in which maximum
daily temperature is below freezing (top). Difference in number of days between
Neutral years and moderate to strong El Niņo years (lower left). Lower right panel
similar to lower left, except for La Niņa years. Data are analyzed on a 2.5o latitude
x 2.5o longitude grid.
Note that the Neutral year composite includes weak ENSO years.
Mean number of days per season (December - February 1948 through 2006) in which minimum
daily temperature is below freezing (top). Difference in number of days between
Neutral years and moderate to strong El Niņo years (lower left). Lower right panel
similar to lower left, except for La Niņa years. Data are analyzed on a 2.5o latitude
x 2.5o longitude grid.
Note that the Neutral year composite includes weak ENSO years.
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