Zoeken
Zoeken kan via de modus 'eenvoudig zoeken' (één veld) of uitgebreid via 'geavanceerd zoeken' (meerdere velden). Zo kan je bv. zoeken op een combinatie van een auteursnaam (auteur), een jaartal (jaar) en een documenttype.
Boekenmand
Nuttige resultaten kan je aanvinken en toevoegen aan een mandje. De inhoud hiervan kan je exporteren of afdrukken (naar bv. PDF).
RSS
Op de hoogte blijven van nieuw toegevoegde publicaties binnen uw interessegebied? Dit kan door een RSS-feed (?) te maken van jouw zoekopdracht.
nieuwe zoekopdracht
The ocean's internal motion: A short overview of NIOZ thermistor string observations
In: Journal of Sea Research. Elsevier/Netherlands Institute for Sea Research: Amsterdam; Den Burg. ISSN 1385-1101; e-ISSN 1873-1414, meer
|  |
| Author keywords |
Thermistor String Observations; Internal Wave-Turbulence; 0.1-100 mvertical scales, 10-10000 s time-scales |
| Abstract |
Detailed observations of the variability in space and time of motions that dominate redistribution of material and heat are rare. However, these motions are vital for life in seas and ocean. Modern electronics have allowed the manufacturing of 1-Hz high-sampling rate, <1-mK precision, 6000-m depth-rated temperature sensors with the potential of 1-year uninterrupted stand-alone operation. These sensors have been specifically developed for use in a vertical array of many O(100), to study dynamic processes like fronts and internal waves in shallow seas and deep ocean. Under conditions of sufficient spatial vertical resolution, O(0.1-1 m), and temperature acting as a proper tracer for density variations, the sensors are excellent in estimating turbulence parameters generated by such processes. In the ocean interior, they reveal continuous internal wave variability and step-like vertical layering in temperature, but very little turbulence. Above sloping topography, small- and large-scale overturnings yield turbulence parameter values which vary by up to four orders of magnitude as a function of time. Largest values are observed in bursts lasting typically 500-1000 s and associated with nonlinear internal wave passages. These bursts occur irregularly in a tidal phase. When extrapolated to the ocean at large, sufficient mixing is observed above sloping boundaries to maintain the overall vertical density stratification. |
IMIS is ontwikkeld en wordt gehost door het VLIZ.
