|
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| Line 36: |
Line 36: |
| | EPSI_FLAGS <math>^a</math> || dissipation_qc_flags || - || [TIME_SPECTRA, N_SHEAR_SENSORS] | | | EPSI_FLAGS <math>^a</math> || dissipation_qc_flags || - || [TIME_SPECTRA, N_SHEAR_SENSORS] |
| |- | | |- |
| | METHOD <math>^b</math>|| method used to make dissipation estimate || - || [TIME_SPECTRA, N_SHEAR_SENSORS] | | | METHOD <math>^b</math>|| method_for_dissipation_estimate || - || [TIME_SPECTRA, N_SHEAR_SENSORS] |
| |} | | |} |
| <math>^a</math> Quality control coding for the final dissipation estimate. | | <math>^a</math> Quality control coding for the final dissipation estimate. |
Revision as of 10:18, 6 June 2022
Level 4 data include the final dissipation estimates as time series, as well as indicators for the quality and accuracy of the estimates and additional derived parameters. Each dissipation estimate in level 4 corresponds to a spectrum in the level 3 data. Consequently, the level 3 and 4 TIME dimensions are the same. Parameter EPSI_FINAL is the final dissipation rate estimate, averaged of the selected estimates (using the QC flags) at that depth.
Dimensions
| Dimension short name |
description
|
| TIME_SPECTRA |
length of the record of average times of spectral segments
|
| N_SHEAR_SENSORS |
number of shear channels (shear sensors)
|
Required Variables
| Parameter Name |
Standard Name |
Units of measurement |
dimensions
|
| TIME |
time |
Days since YYYY-MM-DDT00:00:00Z |
TIME_SPECTRA
|
| SECTION_NUMBER |
|
- |
TIME_SPECTRA
|
| PSPD_REL |
flow_past_sensor |
m s-1 |
TIME_SPECTRA |
|
| EPSI |
specific_turbulent_kinetic_energy_dissipation_in_water |
W kg-1 |
[TIME_SPECTRA, N_SHEAR_SENSORS]
|
| EPSI_FINAL |
specific_turbulent_kinetic_energy_dissipation_in_water |
W kg-1 |
TIME_SPECTRA
|
| KMAX |
maximum_wavenumber_used_for_estimating_ turbulent_kinetic_energy_dissipation |
cpm |
[TIME_SPECTRA, N_SHEAR_SENSORS]
|
| EPSI_FLAGS [math]\displaystyle{ ^a }[/math] |
dissipation_qc_flags |
- |
[TIME_SPECTRA, N_SHEAR_SENSORS]
|
| METHOD [math]\displaystyle{ ^b }[/math] |
method_for_dissipation_estimate |
- |
[TIME_SPECTRA, N_SHEAR_SENSORS]
|
[math]\displaystyle{ ^a }[/math] Quality control coding for the final dissipation estimate.
[math]\displaystyle{ ^b }[/math] METHOD=0 for spectral integration, METHOD=1 for fitting to the inertial subrange.
Optional Level 4 Variables
| Parameter Name |
Standard Name |
Units of measurement |
dimension
|
| PRES |
water_pressure |
dbar |
TIME_SPECTRA
|
| KVISC |
kinematic_viscosity_of_water |
m2 s-1 |
TIME_SPECTRA
|
| FOM |
figure_of_merit |
- |
[TIME_SPECTRA, N_SHEAR_SENSORS]
|
| MAD |
mean_absolute_deviation |
- |
[TIME_SPECTRA, N_SHEAR_SENSORS]
|
| VAR_RESOLVED |
variance_resolved |
- |
[TIME_SPECTRA, N_SHEAR_SENSORS]
|
| KMIN |
minimum_wavenumber_used_for_estimating_ turbulent_kinetic_energy_dissipation |
cpm |
[TIME_SPECTRA, N_SHEAR_SENSORS]
|
| EPSI_STD |
standard_deviation_of_kinetic_ energy_dissipation_estimate |
- |
[TIME_SPECTRA, N_SHEAR_SENSORS]
|
Return Dataset requirements for shear probes.
