El Niño and La Niña.

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Presentation transcript:

El Niño and La Niña

Weather Conditions Normal weather patterns – strong westerly winds and upwelling along the South America coast. El Niño – weather patterns do not have the strong westerly winds, upwelling disappears

Southern Oscillation El Niño – temperatures over the ocean are changed  changes in the currents

La Niña El Niño – December 1997 La Niña – December 2000 Sea surface temperature anomalies (°C) La Niña (“The Girl” – opposite of “The Boy”) –cooler than normal temperatures in the tropical Pacific Ocean United States – the winters tend to be warmer and cooler than normal summers

Occurrences of El Niño and La Niña El Niño Years 1902-1903 1905-1906 1911-1912 1914-1915 1918-1919 1923-1924 1925-1926 1930-1931 1932-1933 1939-1940 1941-1942 1951-1952 1953-1954 1957-1958 1965-1966 1969-1970 1972-1973 1976-1977 1982-1983 1986-1987 1991-1992 1994-1995 1997-1998 2006-2007 La Niña Years 1904-1905 1909-1910 1910-1911 1915-1916 1917-1918 1924-1925 1928-1929 1938-1939 1950-1951 1955-1956 1956-1957 1964-1965 1970-1971 1971-1972 1973-1974 1975-1976 1988-1989 1995-1996

Questions How do El Niño and La Niña effect the local fishermen in South America? Do you think El Niño is an important area for scientific study today? Why? List 3 ways El Niño has an impact on human cultures around the world today.

Assignment Complete Human Impacts on Weather

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