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| Lập профайл CTD× | Vận tốc địa tĩnh× | |
|---|---|---|
| Lĩnh vực | Hải dương học | Hải dương học |
| Họ | Process / pipeline | Process / pipeline |
| Năm ra đời≠ | 1977 | 1942 |
| Người khởi xướng≠ | Neil Brown | Harald Sverdrup |
| Loại≠ | instrumental | theoretical-method |
| Công trình gốc≠ | 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 ↗ |
| Tên gọi khác | CTD, Rosette Sampling | Geostrophic Current, Thermal Wind Equation |
| Liên quan | 3 | 3 |
| Tóm tắt≠ | 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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