Climate Change and Food Security by David Lobell & Marshall Burke

Author:David Lobell & Marshall Burke
Language: eng
Format: epub
Publisher: Springer Netherlands, Dordrecht

6.4 An Illustrative Example

Graph A of Fig. 6.1 displays crop yields in Lesotho in light grey squares and South Africa in black triangles for the years 1961–2000. The x-axis displays average temperature during the growing season, while the y-axis displays log yields (note that this variable can be negative as the log of 1 is 0, so any yield less than 1 ton/ha is a negative number). Lesotho is colder than South Africa as all grey squares lie to the left of the black triangles. Average yields are also lower is Lesotho than in South Africa as the average y-value of the grey squares is lower than the average height of the triangles.

Fig. 6.1Maize yields and average temperatures in Lesotho and South Africa (1961–2000)

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