In low latitudes, the low(s) of the diurnal...

🔍 Key Concepts

• Diurnal pressure variation in low latitudes (tropical regions) follows a very regular daily cycle with two highs and two lows each day. • Think about when the atmosphere is most heated and how that affects pressure (thermal tides). • Remember that the pressure highs tend to occur around times when temperature change is slowing, and pressure lows when heating or cooling is strongest.

💭 Think About

• First, picture a 24-hour clock and mark when the Sun is highest (local noon) and when it is coolest (just before sunrise). How would strong heating vs cooling affect air pressure? • If there are two low-pressure points each day, they will be roughly 12 hours apart. Look at the choices and see which pairs are about 12 hours apart and make sense with the heating cycle. • Compare the given times to typical times of maximum and minimum temperature. Would pressure be lowest exactly when temperature is highest, or slightly before/after?

✅ Before You Answer

• Confirm that you are thinking about tropical/low latitude diurnal pressure, which is very regular and semi-diurnal (twice daily). • Check which option(s) give two distinct times roughly 12 hours apart, consistent with a twice-daily pattern. • Eliminate any option that represents typical times for highs rather than lows in the standard diurnal pressure curve in low latitudes.

In low latitudes, the low(s) of the diurnal variation of pressure occur(s) at __________.

noon and midnight

noon

1000 and 2200

0400 and 1600

🔍 Key Concepts

💭 Think About

✅ Before You Answer