Final answer:
Subtropical high pressure systems typically bring dry and stable conditions, not frequent rainstorms, making this statement false. Rainstorms are more commonly associated with low-pressure systems where moist air rises and condenses.
Step-by-step explanation:
The statement that subtropical high pressure systems are associated with frequent rainstorms is false. Subtropical high pressure systems are generally associated with dry and stable air, leading to clear skies and minimal rainfall. Deserts such as the Sahara Desert in northern Africa or the Namib Desert in southwestern Africa are dry because of the high-pressure, dry air descending at those latitudes. These areas are characterized by low annual precipitation and high temperatures, with evaporation typically exceeding precipitation.
In contrast, low-pressure systems lead to weather conditions conducive to rainstorms. As moist air rises and condenses, clouds form, increasing the likelihood of precipitation. These conditions are more likely to instigate weather events like rainstorms or even tropical storms and hurricanes, which can indeed bring an increase in both wind strength and precipitation amounts.