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Zorluk: OrtaAtmosphere and Weather

During a sunny summer afternoon along a coastline, land absorbs solar radiation and heats up significantly faster than the adjacent ocean water. Which of the following best explains how this differential heating produces a daytime sea breeze?

  1. A
    Intense heating expands the air over the land to create a surface high-pressure system that forces air outward toward the ocean.
  2. Warm air over the land rises, creating a localized low-pressure zone that draws cooler, denser air inland from over the ocean.Cevap
  3. C
    Rapid water evaporation from the ocean surface builds a dense low-pressure system over the water that pulls cold air off the land.
  4. D
    Cold air descends over the land surface, forcing warm marine air to push downward and backward into the sea.

Cevap

Warm air over the land rises, creating a localized low-pressure zone that draws cooler, denser air inland from over the ocean.
Because land has a lower specific heat capacity than water, it warms faster under direct sunlight. The air over the land heats up, expands, and rises via convection, establishing a localized area of low pressure at the surface. Over the cooler ocean, the air remains denser and under higher pressure. The resulting horizontal pressure gradient drives the cooler marine air onshore toward the lower-pressure area on land, forming a classic sea breeze.

Adım Adım Çözüm

1
Analyze the thermal properties and temperature differences between land and water during the day.
Land has a lower specific heat capacity than water, causing the ground and the air directly above it to warm much faster during daylight hours.
Differential heating establishes temperature gradients between adjacent coastal surfaces.
2
Determine the resulting vertical air motion and surface pressure changes over both regions.
The heated air over the land expands, becomes less dense, and ascends, producing a relative thermal low pressure at the surface. Meanwhile, the cooler, denser air over the water maintains higher relative surface pressure.
Rising warm air reduces surface atmospheric pressure, while cooler air maintains higher density and pressure.
3
Apply the pressure gradient principle to identify the direction of surface wind flow.
Air naturally accelerates from higher pressure toward lower pressure, driving a cool surface breeze from the ocean toward the land (a sea breeze).
Pressure gradient forces always direct horizontal surface airflow from high-pressure to low-pressure areas.

Anahtar Kavram

Sea breeze circulation driven by differential heating and local pressure gradients
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Atmosphere and Weather

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