Global mean atmospheric circulation
Global mean atmospheric circulation
January 0 1026 Icelandic loy Siberian Aleutian low H H 1008 Be 30 high 1020 1014 H Pacific ITCZ H H H 1008
January
4 1008 Bermuda hig H 七 H 1014 1014 H H H (b)July Note the seasonal changes in the global atmospheric circulation ITCZ migrates with Sun, but lags it
July Note the seasonal changes in the global atmospheric circulation ITCZ migrates with Sun, but lags it
180 5880 H 5720 5560 5400一 -20° 5080 (a)January Longitude FIGURE 11.8 Average 500-mb chart for the month of January (a)and for July(b). Solid lines are contour lines in meters above sea level. Dashed lines are isotherms in oC. Arrowheads illustrate wind direction easonal changes in upper air (500mb level) atmospheric circulation
Seasonal changes in upper air (500mb level) atmospheric circulation January
-20° H H 5880 H H -109……”…………“”““““”……“ 5720 5560 20°· 5400一 30°…“““…”““““……““……如,,机……“““-30° 一5240一 (b)July Longitude Seasonal changes in upper air (500mb level) atmospheric circulation
Seasonal changes in upper air (500mb level) atmospheric circulation July