The heat budget of the earth

Correct answer: A. It absorbs and scatters some radiation, transfers heat, and emits longwave radiation

The correct answer is A. The atmosphere actively affects energy flows: it absorbs and scatters some radiation, transfers heat, and emits longwave radiation. These processes help determine how energy moves between the surface, atmosphere, and space.

Correct answer: A. The heat-storage capacity of the oceans

The correct answer is A. Oceans have a large heat-storage capacity, so they can absorb or release substantial heat while changing temperature relatively slowly. This helps the climate system resist rapid temperature changes and gives it thermal inertia.

Correct answer: A. When the oceans store some of the added energy for a time

The correct answer is A. Oceans have a large capacity to absorb and store heat, so the surface and atmosphere may warm gradually even after radiative forcing changes. This thermal inertia can create a time lag.

Correct answer: A. Because the surface also receives downward longwave radiation from the atmosphere and exchanges energy through latent and sensible heat fluxes

The correct answer is A. The surface energy budget includes more than absorbed sunlight and emitted longwave radiation: the atmosphere sends longwave radiation back toward the surface, and energy is also transferred as latent and sensible heat. Therefore, those two radiation terms alone do not describe the full surface balance.

Correct answer: A. The Earth system is receiving more energy than it is sending back to space

The correct answer is A. A positive net downward balance means incoming energy exceeds the energy reflected and emitted back to space. The Earth system therefore gains energy, which can be stored, especially in the oceans, and can contribute to warming.

Correct answer: A. Because energy flows vary with clouds, weather, surface conditions, and season

The correct answer is A. A heat-budget diagram usually presents simplified or averaged values. Actual energy flows vary from place to place and over time as clouds, weather, surface properties, and seasons change.

Correct answer: A. It accounts for incoming solar shortwave radiation, reflected shortwave and outgoing longwave radiation, as well as energy exchanges and transport within the Earth system

The correct answer is A. Earth's heat budget is an account of energy entering, leaving, and moving within the Earth system. At the top of the atmosphere, it compares incoming solar energy with reflected solar and outgoing terrestrial radiation; exchanges and transport within the system help determine where that energy goes.

Correct answer: A. The surface absorbs it and re-emits longwave heat

Most incoming solar energy reaches Earth as relatively shortwave radiation. Land and water absorb part of it, increasing their internal energy and temperature. The warmed surface then emits energy as longer-wave infrared radiation. Greenhouse gases can absorb some of this outgoing radiation and re-emit it.

Correct answer: A. Incoming energy absorbed by Earth and energy leaving for space are unequal

Thermal or radiative balance exists when the Earth–atmosphere system absorbs approximately as much energy as it sends back to space. An imbalance occurs when incoming absorbed energy and outgoing energy are unequal. A positive imbalance stores heat and raises temperature, while a negative imbalance causes cooling. Option B describes balance, not imbalance.