Ocean currents off the Americas. Satellite-based graphic showing ocean currents (swirling coloured lines) on an Earth globe centred on the Americas. The colours indicate ocean temperatures, ranging from the warm tropics (red) to cooler water (green) in more temperate latitudes. Ocean currents seen here include the warmer Equatorial Counter in the Pacific (centre left), and the Gulf Stream in the Atlantic (upper right). The dusk terminator (day-night line) is at lower right, marking the places from where the Sun is seen setting in the west as the Earth rotates on its axis.