Ocean Surface Topography is the height of the ocean surface relative to a level of no motion defined by the geoid, a surface of constant geopotential, and provides information on tides, circulation, and the distribution of heat and mass in the Earth’s global ocean.

Ocean surface topography or sea surface topography, also called ocean dynamic topography, are highs and lows on the ocean surface, similar to the hills and valleys of Earth's land surface depicted on a topographic map.

2023年9月14日 · Ocean Surface Topography (OST) represents variations in sea surface height (SSH) against the geoid, which is the shape the ocean surface would assume with no currents or tides. OST measurements can provide long-term information about ocean circulation, mass and heat content, weather, tides and other dynamic ocean phenomena – all of which are ...

Sea Surface Height (SSH) is the height of the sea surface above a reference ellipsoid. This is the direct product of satellite altimetry. Sea surface height values are provided along the satellites’ ground tracks or at regular grids interpolated from the values determined along the satellite tracks.

2022年12月16日 · The Surface Water Ocean Topography (SWOT) mission is a proposed NASA mission to make the first global survey of Earth's surface water. SWOT is being developed by an international group of hydrologists and oceanographers to provide a better understanding of the world’s oceans and its terrestrial surface waters.

2025年1月15日 · NASA’s Ocean Physics program enables research that advances our understanding of the ocean’s role in climate. Our scientists utilize NASA satellite and sub-orbital data, climate models and data science to study ocean dynamics, sea level rise, hydrological cycle, and ocean interactions within the Earth system.

2025年2月6日 · To measure sea surface height, or surface topography, scientists need to obtain the precise distance between the satellite and the center of the Earth and the precise distance between the satellite and the sea surface. Sea surface height is then calculated by subtracting the distance between the sea

2015年8月4日 · Sea surface topography is the height and shape of the ocean’s surface. Certain parts of the ocean are taller than others because of currents or, in some cases, because of underwater mountains that pile up the ocean water. The most comprehensive way to measure topography is from space.

The mean sea surface topography associated with spatial variations in the Earth's gravity field has vertical amplitudes 100 times larger than sea level changes generated by tides and ocean currents. To first order, therefore, altimeter data reveal information about marine gravity.

Observations from space show that the rate of sea level rise is increasing. Knowing where and how much rise is happening can help coastal planners prepare for future hazards. A long-term sea level dataset shows ocean surface heights continuing to rise at faster and faster rates over decades of observations.