Figure 3 : Strengthening of the subtropical high.

From: Recent decrease in typhoon destructive potential and global warming implications

Figure 3

Strengthening of the subtropical high as depicted by the 1,560 and 1,530 geopotential lines at 850 hPa with anomalous wind vectors from the latest pentad (2008–2012) with respect to 20-year mean (1993–2012) overlaid. The averaged typhoon genesis positions (with 1 standard deviation) over three different periods in the past 20 years are also depicted. MDR=main development region.