Velocity point-measurements: Difference between revisions

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= Welcome to the velocity point-measurements subgroup! =
= Welcome to the velocity point-measurements subgroup! =
This subgroup addresses best practices in obtaining [[turbulent kinetic energy dissipation]] rate estimates from time series of velocities measured at a point in space. These temporal measurements are converted into spectral observations in the wavenumber (space) domain before being fitted with a model spectrum to obtain [[turbulent kinetic energy dissipation]].
This subgroup addresses best practices in obtaining [[turbulent kinetic energy dissipation]] rate estimates from time series of velocities measured at a point in space. Our recommendations are designed for measurements collected by any manufacturer, provided the data quality is sufficient for resolving the [[Velocity inertial subrange model|inertial subrange]] of the velocity spectra.


= Scope =
The subgroup will provide recommendations on:
# [[data processing of raw measurements]]
# [[segmenting datasets]] and separating the turbulence signal from deterministic signals (e.g, surface waves)
# [[spectral computations]] and [[Identify the inertial subrange| identifying the inertial subrange]] to [[Spectral fitting|fit the model spectra]]
# [[quality control measures]]


{|class="wikitable" style="margin-left: auto; margin-right: auto; border: none; text-align:center;"
|[[File:Advprocessing.png|180px|link=Flow chart for velocity point-measurements|Flow chart for velocity point-measurements]]
|[[File:Benchmark adv netcdf.png|370px|link=NetCDF velocimeters format|NetCDF velocimeters format]]
|[[File:TIC Leopold 1.jpg|150px|link=benchmark datasets for velocity measurements|benchmark datasets]]
|-
|[[Flow chart for velocity point-measurements|Flow chart for data processing]]
|[[NetCDF velocimeters format |NetCDF dataset format]]
|[[benchmark datasets for velocity measurements|Benchmark datasets]]
|}


We will also provide [[benchmark datasets for velocity measurements]] impacted and unaffected by surface waves. Although some work has been done in obtaining turbulence estimates from moored platforms, we will not be providing benchmark datasets at this time. However, appropriate references to existing literature will be included.
We will provide [[benchmark datasets for velocity measurements|benchmarks for velocity measurements]] both impacted and unaffected by surface waves. These [[benchmark datasets for velocity measurements|benchmarks]] will be a resource for the Ocean Mixing Community to evaluate routines in any programming language.  These [[benchmark datasets for velocity measurements|benchmarks]] will be limited to instruments fixed in space. We will nonetheless include appropriate references to the existing literature on handling moored instruments.


Our recommendations are intended to be applicable to measurements irrespective of the manufacturer provided the data is of sufficient quality for resolving the turbulence subrange of the velocity spectra.
The benchmark datasets will follow the ATOMIX [[NetCDF velocimeters format]]. The [[benchmark datasets for velocity measurements]] are intended to be a resource that can be used by the community to evaluate routines in any programming language.


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[[Category:Velocity point-measurements]]
[[Category:Velocity point-measurements]]

Latest revision as of 12:52, 5 July 2022

Welcome to the velocity point-measurements subgroup!

This subgroup addresses best practices in obtaining turbulent kinetic energy dissipation rate estimates from time series of velocities measured at a point in space. Our recommendations are designed for measurements collected by any manufacturer, provided the data quality is sufficient for resolving the inertial subrange of the velocity spectra.


Flow chart for velocity point-measurements NetCDF velocimeters format benchmark datasets
Flow chart for data processing NetCDF dataset format Benchmark datasets

We will provide benchmarks for velocity measurements both impacted and unaffected by surface waves. These benchmarks will be a resource for the Ocean Mixing Community to evaluate routines in any programming language. These benchmarks will be limited to instruments fixed in space. We will nonetheless include appropriate references to the existing literature on handling moored instruments.