Dear CF users,
I have been producing for a few years some "exotic" parameters that do
not show up in the list of standard names. My data archive people would
thus like to have some new standard names approved.
Here are the parameters and suggested standard names:
1. Directional spread (defined from the full spectrum, see Kuik et al.
J. Phys. Oceanogr. 1988) :
_
_|_sea_surface_wave_directional_spread_from_first_moments
<javascript:void(0)>_
|The wave directional spectrum can be written as a five dimensional
function S(t,x,y,f,theta) where t is time, x and y are horizontal
coordinates (such as longitude and latitude), f is frequency and theta
is direction. S has the standard name
sea_surface_wave_directional_variance_spectral_density. S can be
multiplied by cos(theta) and integrated over direction to give a1=
integral(S*cos(theta) dtheta), likewise b1=integral(S*sin(theta)
dtheta). After defining m1=sqrt(a1^2+b1^2), the directional spread is
then, in radians, s1=sqrt(2*(1-m1)). This value is usually converted to
degrees as s1=sqrt(2*(1-m1))*180/pi .
2 and 3: Surface Stokes drift vector:
|sea_surface_wave_Stokes_eastward_drift <javascript:void(0)>
|
|Drift induced by short surface gravity waves (wind waves and swell) in
the east direction
||sea_surface_wave_Stokes_northward_drift <javascript:void(0)>
|
|Drift induced by short surface gravity waves (wind waves and swell) in
the north direction
|
4 and 5: Wave-induced volume transport
|sea_surface_wave_Stokes_eastward_transport <javascript:void(0)>
|
|Volume transport induced by short surface gravity waves (wind waves and
swell) in the east direction
||sea_surface_wave_Stokes_northward_transport <javascript:void(0)>
|
|Volume transport induced by short surface gravity waves (wind waves and
swell) in the north direction
|
6 and 7: Surface slope moments
|sea_surface_wave_east_west_mean_square_slope <javascript:void(0)>
Mean square of the sea surface slopes in the east-west direction
|
|sea_surface_wave_north_south_mean_square_slope <javascript:void(0)>
Mean square of the sea surface slopes in the north-south direction
|
8. Wind to waves energy flux :
atmosphere_to_sea_surface_wave_energy_flux_per_unit_area
Flux of energy from the wind to waves per unit area of the sea surface.
9. waves to ocean energy flux :
sea_surface_wave_to_ocean_energy_flux_per_unit_area
Flux of energy from the the surface waves to the ocean turbulence per
unit area of the sea surface.
10 and 11: Same thing for momentum components:
sea_surface_wave_to_ocean_eastward_momentum_flux_per_unit_area
Eastward momentum flux from the the surface waves to the ocean current
per unit area of the sea surface.
sea_surface_wave_to_ocean_northward_momentum_flux_per_unit_area
Northward momentum flux from the the surface waves to the ocean current
per unit area of the sea surface.
12 to 15: Sea bottom agitation parameters:
sea_surface_wave_root_mean_square_amplitude_of_bottom_velocity
Root mean square amplitude of bottom orbital velocity induced by surface
gravity waves.
sea_surface_wave_bottom_velocity_mean_direction
Mean direction of bottom orbital velocity induced by surface gravity waves.
sea_surface_wave_root_mean_square_amplitude_of_bottom_displacement_magnitude
Magnitude of root mean square amplitude of bottom orbital displacements
induced by surface gravity waves.
sea_surface_wave_bottom_displacement_mean_direction
Mean direction of bottom orbital displacement induced by surface gravity
waves.
That's all for now.
Thanks,
Fabrice
--
ICA Fabrice Ardhuin (Dr, HDR)
SHOM/HOM/REC --- French Naval Oceanographic Center
Vagues et domaine littoral --- Waves and nearshore
13 rue du Chatellier, CS 92803, 29228 BREST CEDEX 2
Phone: (33) 2 98 149 936 (num?ro marine Brest: 24936)
Fax: (33) 2 98 221 864
http://www.previmer.org http://surfouest.free.fr
http://www.shom.fr/fr_page/fr_act_oceano/vagues/vagues.htm
Received on Fri Oct 16 2009 - 14:24:25 BST
