Figure 2: Performance of various SST indices in explaining future Sahel rainfall change. | Nature Communications

Figure 2: Performance of various SST indices in explaining future Sahel rainfall change.

From: Northern-hemispheric differential warming is the key to understanding the discrepancies in the projected Sahel rainfall

Figure 2

(ac) Scatter plots of future changes (that is, mean difference between the twenty-first century and twentieth-century) in Sahel rainfall versus those in three different SST indices across the CMIP5 models: NH extratropical SST warming relative to tropical warming ((0°–360°E, 30°–75°N) minus (0°–360°E, 20°S–20°N)) (a), global interhemispheric SST gradient ((0°–360°E, 0°–90°N) minus (0°–360°E, 0°–90°S)) (b) and difference between subtropical North Atlantic SST and global tropical SST ((75°–15°W, 10°–40°N) minus (0°–360°E, 20°S–20°N)) (c). Each mark represents an individual model in CMIP5. The fitted linear regression lines are shown as red lines.

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