Just as the surface of Earth is not flat, the surface of the ocean is also not flat. Sea-level rise at specific locations may be more or less than the global average owing to many local factors such as different temperatures of the seawater, ocean currents, salinity, shifts in average wind speed and atmospheric pressures, changes in the amount of water on land, gravitational adjustments owing to ice loss and whether the land is still rebounding now relieved of the heavy weight of Ice Age glaciers.