The primary control in sea level changes in changes in ice sheet volume. The sea levels are rising on a yearly basis due to the warming of the Earth's surface majorly since the past 2 centuries. More specifically, it has been at an all time high since the beginning of the Industrial Revolution.
Gases like carbon dioxide, nitrogen dioxide and various other greenhouse gases have raised temperatures and unfortunately more so in the poles and therefore the melting of the glaciers has led to an increase in the rise of water levels.
The best estimate of the global glacier ice volume as calculated by scientists is 170 x 103 ± 21 x 103 km3. This is the volume outside Greenland and Antarctica.
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