قارن الطرق

	نقل إيكمان	مقیاس دوبلر الصوتي لتيارات المياه	السرعة الجيوستروفية
المجال	علم المحيطات	علم المحيطات	علم المحيطات
العائلة	Process / pipeline	Process / pipeline	Process / pipeline
سنة النشأة	1905	1983	1942
صاحب الطريقة	Vagn Walfrid Ekman	RD Instruments	Harald Sverdrup
النوع	theoretical-method	instrumental	theoretical-method
المصدر التأسيسي	Ekman, V. W. (1905). On the influence of the Earth's rotation on ocean currents. Arkiv for Matematik, Astronomi och Fysik, 2(11), 1-52.	RD Instruments. (1996). Acoustic Doppler Current Profiler Principles of Operation. A Practical Primer. RD Instruments Technical Note.	Sverdrup, H. U., Johnson, M. W., & Fleming, R. H. (1942). The Oceans: Their Physics, Chemistry, and General Biology. Prentice-Hall.
الأسماء البديلة	Ekman Spiral, Wind-driven Transport	ADCP	Geostrophic Current, Thermal Wind Equation
ذات صلة	3	3	3
الملخص	Ekman transport is the net volume flux of water driven by wind stress balanced with Coriolis force in the surface boundary layer. Derived by Vagn Walfrid Ekman in 1905 from the principle that wind stress is transmitted through the water column in a spiral pattern, Ekman transport is responsible for coastal upwelling and important oceanographic transports. The theory links surface wind patterns directly to ocean circulation.	The Acoustic Doppler Current Profiler (ADCP) is an instrument that uses Doppler-shifted acoustic backscatter to measure water velocity profiles along a vertical profile. Developed by RD Instruments in the 1980s, it has become the standard method for high-resolution current profiling in oceanographic research. ADCPs provide unprecedented spatial and temporal resolution of ocean 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.