Distribution of temperature and inversion of temperature

Land has lower thermal inertia, so temperature changes greatly with seasons. Exam tip: connect continentality with large annual range.

Even at the same latitude, altitude lowers temperature and the sea moderates it. Exam tip: observe combined factors in comparisons.

Water changes temperature slowly while land responds quickly. Exam tip: identify land-water influence from isotherm shape.

Inland areas far from the sea can be very cold in winter and very hot in summer. Exam tip: connect distance from sea with temperature range.

Dense cold air stays below and the warm layer above acts like a lid. Exam tip: treat stability as a sign of inversion.

Enclosed topography reduces air drainage and inversion can trap pollution. Exam tip: connect topography with air quality.

Currents bring warm or cold water and change the temperature of coastal air. Exam tip: remember currents as heat transport.

A cold current can stabilize air and reduce convection and rainfall chances. Exam tip: remember examples like the Namib and Peru coasts.

In a dry clear atmosphere, both daytime heating and nighttime cooling are strong. Exam tip: link deserts with high diurnal range.

More land cools rapidly in winter and bends isotherms. Exam tip: explain hemispheric difference through land-water distribution.

Cold deep water rises to the surface and can cool lower air. Exam tip: connect upwelling with coastal cooling.

Altitude can create temperature difference, so sea-level adjustment makes comparison fair. Exam tip: separate the altitude effect.

Close lines show sharp temperature difference and wide lines show gentle difference. Exam tip: read gradient from line spacing.

When the surface warms, convection and dispersion increase and trapped pollutants spread. Exam tip: link inversion breakup with mixing.

Cold air settles below and the temperature order can reverse with height. Exam tip: connect frost risk with valley floors.

Warm currents and winds bring maritime heat to the coast. Exam tip: explain regional exceptions through currents and winds.

Trees change surface energy receipt and moisture processes. Exam tip: compare forested and open areas.

The direct answer is A: concrete and asphalt slowly release stored daytime heat. An urban heat island is an area in which a city is warmer than nearby rural surroundings, especially at night. During the day, dark surfaces such as asphalt and roofs absorb solar energy, while concrete and buildings store heat. After sunset, these materials do not become cool immediately; they release the stored heat gradually into the surrounding air. Buildings and human activities can add further heat, so the night minimum temperature may remain higher. Option A correctly gives the physical reason. Option B is wrong because the Sun does not rise at night; the difference is caused by heat storage and release. Option C is wrong because rural areas do not always become seas; it has no connection with urban heating. Option D is wrong because cities do have an atmosphere, and the atmosphere helps carry released heat. The key chain is: built surfaces absorb heat by day, store it, and release it at night. Memory cue: dark city surfaces act like slow-release heat stores.

Winds bring thermal properties from their source region. Exam tip: connect wind direction with air masses.

The warm upper layer prevents the lower cold air from rising. Exam tip: write the relation between inversion and smog.

The direct answer is A: avoiding valley floors for frost-sensitive crops. Temperature inversion occurs when colder air lies below warmer air, reversing the usual decrease of temperature with height. On clear, calm nights, mountain slopes lose heat quickly. The air touching the cold ground becomes dense and flows downward, collecting in the valley. Valley floors can therefore become colder than nearby slopes, and frost may form there. Frost-sensitive horticultural crops can be damaged by this low temperature. Option A is correct because inversion knowledge helps farmers choose slightly elevated slopes instead of cold-air pools in valley bottoms. Option B concerns marine fish farming and water depth, not atmospheric temperature inversion. Option C concerns tides in a desert, which is unrelated to inversion. Option D concerns locating an earthquake focus, a geological problem unrelated to temperature layers. The reasoning is: clear night, ground cooling, dense cold air sinking, valley pooling, frost risk, and better site selection on suitable slopes. Memory cue: cold air settles low; frost-prone crops should avoid valley bottoms.

Currents locally modify the temperature expected from latitude. Exam tip: compare coasts at the same latitude.

The direct answer is A: high albedo of snow and surface cooling. Albedo means the fraction of incoming sunlight reflected by a surface. Snow is bright, so it reflects much solar energy and absorbs less. The snow-covered ground therefore receives little heat, becomes cold, and cools the air touching it. At night, the cold surface can also lose heat by radiation, making the lowest air layer very cold and sometimes producing a temperature inversion. Option A is correct because it identifies both high reflection and resulting surface cooling. Option B is wrong: snow generally has high, not very low, reflection. Option C is wrong because snow does not produce solar energy; it mainly reflects sunlight. Option D is wrong because air is present above snow, and absence of atmosphere is not the cause. Exam cue: bright surface means high albedo, less absorption and stronger cooling.

Moisture forms fog and inversion prevents it from dispersing. Exam tip: write both moisture and stability for fog.

Temperature generally decreases with altitude because the atmosphere is mainly heated from below. Exam tip: remember normal lapse rate.