Figure 2: The projected future distribution of change in precipitation (color), 500hPa altitude (isopleths), 850hPa wind (arrows) around Japan in summer (June, July, August). The result is difference between the average during 1971-2000 and the average during 2071-2100 in Scenario "A1B". 500hPa altitude denotes change in barometric pressure in the upper air representing the troposphere. H shows change in a high pressure anomaly and L shows change in a low pressure anomaly. 850hPa wind shows the current in the lower layer of troposphere, which lies at an altitude of about 1500m.