have different masses and a different number of neutrons

have the same mass and the same number of protons

have the same mass and the same number of neutrons

have different masses and a different number of protons

Earth's rotation

Ocean circulation patterns

Earth's orbital distance from the sun

Atmospheric circulation patterns

Ocean-atmosphere interaction

driven by trade winds and the Intertropical Convergence Zone

driven by deep water formation

areas of low atmospheric pressure that lead to convection

driven by trade winds and mid-latitude westerly winds

caused by El Niño - Southern Oscillation (ENSO)

caused by ocean salinity gradients

Atmospheric CO₂ is now higher than at any point in the last 800,000 years

The concentration of methane in the atmosphere has been about the same as carbon dioxide since about 1950

The amount of CO₂ absorbed by the oceans is decreasing

CO₂ both increases and decreases every year, so there is no long term change in CO₂