Explain the concept of dynamic equilibrium in relation to the water cycle? (4 marks)
Dynamic equilibrium is when the magnitude of inputs and outputs of a system are equal. An increase in global temperatures will lead to an increase in the melting of the polar ice caps and tundra. As a result, a transfer of freshwater from the cryosphere to the global oceans. This will lead to an increase in the evaporation of water vapour, which will condense to form cumulus clouds in the atmosphere. This will reflect incoming solar radiation and lead to cooler temperatures. Therefore, more ocean water to freeze and become ice, forming part of the cryosphere.