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| Lagranžijanska analiza pomičnih bova× | Geostrofska brzina× | |
|---|---|---|
| Područje | Oceanografija | Oceanografija |
| Obitelj | Process / pipeline | Process / pipeline |
| Godina nastanka≠ | 1985 | 1942 |
| Tvorac≠ | Robert Davis | Harald Sverdrup |
| Vrsta≠ | instrumental | theoretical-method |
| Temeljni izvor≠ | Davis, R. E. (1985). Drifter observations of coastal surface currents during CODE: The method and descriptive view. Journal of Geophysical Research, 90(C3), 4741-4755. DOI ↗ | Sverdrup, H. U., Johnson, M. W., & Fleming, R. H. (1942). The Oceans: Their Physics, Chemistry, and General Biology. Prentice-Hall. link ↗ |
| Drugi nazivi | Lagrangian Tracking, Drifter Analysis | Geostrophic Current, Thermal Wind Equation |
| Srodne | 3 | 3 |
| Sažetak≠ | Drifter Lagrangian analysis tracks the motion of water parcels using surface drifters (buoys with attached drogues) to measure ocean currents directly. Developed by Robert Davis in the 1980s, this method provides direct observation of water parcel trajectories and enables estimation of eddy diffusivity, transport pathways, and mixing. Drifter data complement Eulerian (fixed-point) observations by capturing the Lagrangian perspective of fluid motion. | Geostrophic velocity is the current driven by balance between the pressure gradient force and the Coriolis force, derived from the thermal wind equation. In most of the ocean away from the equator and coastal boundaries, geostrophic balance is an excellent approximation to the actual flow. Developed by Harald Sverdrup and colleagues in the 1940s, geostrophic velocity calculation from hydrographic data enables estimation of ocean currents without direct current measurements. |
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