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概要：
Historical Occurrence of El Nino and its Impact on Food Crop Production at a Regional Level in Asia and the Pacifi c 93namely, more El Nino events since the 1970s, with a continu....

Historical Occurrence of El Nino and its Impact on Food Crop Production at a Regional Level in Asia and the Pacifi c 93namely, more El Nino events since the 1970s, with a continuous sequence in the early1990s and two major events in 1982-1983 and 1997-1998. It is also suggested thatthe changed frequency and intensity of recent El Nino events is beyond the expectedclimate system variability but may be linked to anthropogenic influences (WorldMeteorological Organization, 1999).1.01.52.02.53.03.51961196519701972197519771980198219851987199019911994199519972000YearTons/haFigure 6. Yield of total cereals in the region, 1961-2000Source: FAOSTAT. El Nino years are shown in shadow.Figure 7. Area harvested of total cereals in the region, 1961-2000Source: FAOSTAT. El Nino years are shown in shadow.404550556065701961196519701972197519771980198219851987199019911994199519972000YearsMillion ha