Please enable JavaScript.
Coggle requires JavaScript to display documents.
Food security (El Nino & crop yields (Related to Southern Oscillation…
Food security
El Nino & crop yields
-
Related to Southern Oscillation Index- correlation between surface pressure difference in Tahiti and Darwin
-
-
-
Negative SOI: below normal air pressure at Tahiti & above normal air pressure at Darwin. Prolonged periods coincide with abnormally warm waters across Eastern tropical
Positive SOI: abnormally cold ocean waters across Eastern tropical Pacific, typical of La nina episodes
-
-
climate change
-
-
FACE experiments
-
-
Elevated CO2 increases photosynthesis (C3, wheat) & reduces water use- yield increases up to 70% observed
-
-
El Nino impacts
Crop yields
El Nino improves the global mean soybean yield by 2.1 to 5.4% but reduces yields of maize, rice and wheat by -4.3% to +0.8%
-
-
Food security
Food security= food systems adapted to ensure availability, access, utilisation and stability (quality, nutrition, safety, affordability)
-