Semi-Permanent Pressure Cells
q  The Aleutian, Icelandic, and Tibetan lows
The oceanic (continental) lows achieve maximum strength during
winter (summer) months
The summertime Tibetan low is important to the east-Asia
monsoon
q  Siberian, Hawaiian, and Bermuda-Azores highs
The oceanic (continental) highs achieve maximum strength during
summer (winter) months