Which factor best explains why coastal areas often have milder temperatures than inland areas?

Which factor best explains why coastal areas often have milder temperatures than inland areas?

• A. Latitude alone determines climate.
• B. Altitude alone determines climate.
• C. Proximity to water has no effect on coastal climates.
• D. Proximity to water moderates temperature, producing milder coastal climates.

Answer: (D)

The main idea is that near the ocean, temperatures stay steadier because water changes temperature slowly. The ocean has a high heat capacity, so it stores a lot of heat and releases it gradually. That means in summer the sea absorbs heat and helps keep coastal air cooler, while in winter the sea releases heat and helps keep coastal air warmer. Daytime, land heats up faster than the water, so cooler air from the sea can move toward land (a sea breeze), which lowers coastal daytime highs. At night, the water’s stored heat helps prevent sharp drops in temperature, so nights stay milder than inland areas. Put together, these effects produce milder coastal climates with smaller temperature swings. Latitude, altitude, or the idea that proximity to water has no effect don’t explain why coasts are milder. Latitude sets general climate zones but doesn’t account for the buffering effect of nearby water. Altitude changes temperature, but coastal areas aren’t defined by high elevations. In short, proximity to water moderates temperature, giving coastal regions their milder climate.

The main idea is that near the ocean, temperatures stay steadier because water changes temperature slowly. The ocean has a high heat capacity, so it stores a lot of heat and releases it gradually. That means in summer the sea absorbs heat and helps keep coastal air cooler, while in winter the sea releases heat and helps keep coastal air warmer. Daytime, land heats up faster than the water, so cooler air from the sea can move toward land (a sea breeze), which lowers coastal daytime highs. At night, the water’s stored heat helps prevent sharp drops in temperature, so nights stay milder than inland areas. Put together, these effects produce milder coastal climates with smaller temperature swings.

Latitude, altitude, or the idea that proximity to water has no effect don’t explain why coasts are milder. Latitude sets general climate zones but doesn’t account for the buffering effect of nearby water. Altitude changes temperature, but coastal areas aren’t defined by high elevations. In short, proximity to water moderates temperature, giving coastal regions their milder climate.