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| Хармоничен анализ на приливите× | Профилиране с CTD× | Геострофна скорост× | |
|---|---|---|---|
| Област | Океанография | Океанография | Океанография |
| Семейство | Process / pipeline | Process / pipeline | Process / pipeline |
| Година на възникване≠ | 1867 | 1977 | 1942 |
| Създател≠ | William Thomson | Neil Brown | Harald Sverdrup |
| Тип≠ | fourier-analysis | instrumental | theoretical-method |
| Основополагащ източник≠ | Godin, G. (1972). The Analysis of Tides. University of Toronto Press. link ↗ | UNESCO/IOC. (1991). Processing of oceanographic station data. UNESCO Technical Papers in Marine Science, 60. link ↗ | Sverdrup, H. U., Johnson, M. W., & Fleming, R. H. (1942). The Oceans: Their Physics, Chemistry, and General Biology. Prentice-Hall. link ↗ |
| Други названия | Tidal Constituents, Harmonic Tidal Prediction | CTD, Rosette Sampling | Geostrophic Current, Thermal Wind Equation |
| Свързани | 3 | 3 | 3 |
| Резюме≠ | Tidal harmonic analysis is a mathematical method that decomposes observed sea level or current time series into a sum of sinusoidal components with specific frequencies, amplitudes, and phases corresponding to astronomical tidal constituents. Developed by William Thomson (Lord Kelvin) in 1867, harmonic analysis enables prediction of tides and understanding of tidal dynamics in coastal regions. | Conductivity-Temperature-Depth (CTD) profiling is the primary method for measuring vertical profiles of seawater properties in oceanography. Developed by Neil Brown in 1977, CTD instruments are equipped with sensors for conductivity, temperature, and pressure (depth), and are typically mounted on water-sampling rosettes. CTD profiling provides essential hydrographic data that characterizes water mass structure, stratification, and circulation patterns. | 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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