NetCDF Synoptische Daten im Dreiecksgitter

Kurze Beschreibung

Synoptische Daten an Einzelpositionen.

An anderer Stelle beschriebene Inhalte

• NetCDF Dreiecksgitter: Koordinaten, Topologie und Koordinatentransformation;
• NetCDF Zeitkoordinate: Koordinatenvariable time;
• NetCDF Vertikalkoordinate: Vertikalkoordinate depth oder height:
  1. node_depth : Vertikalkoordinate für tiefenstrukturierte Daten an Knoten;
  2. edge_depth : Vertikalkoordinate für tiefenstrukturierte Daten an Kanten;
  3. poly_depth : Vertikalkoordinate für tiefenstrukturierte Daten an Polygonen.

Bemerkung: Es werden drei verschiedene Vertikalkoordinaten benötigt, da in jedem Attribut formula_terms verschiedene Variablen für Wasserstand und Boden eingesetzt werden müssen.

Dimensionen

Soweit nicht oben festgelegt, mommen noch folgende Dimensionen hinzu:

dimensions:

Ergänzende Informationen für das numerische Verfahren

Kennzeichnung offener und geschlossener Kanten

integer Mesh2_edge_type(nMesh2_edge) ;

Mesh2_edge_type:standard_name = "???" ; \\ yet to be defined

Mesh2_edge_type:long_name = "type of 2D mesh edges, closed or open" ;

Mesh2_edge_type:coordinates = "Mesh2_edge_lon Mesh2_edge_lat" ;

Mesh2_edge_type:_FillValue = fillvalue ;

Mesh2_edge_type:valid_range = 0, 1 ;

Mesh2_edge_type:valid_values = 0, 1 ;

Mesh2_edge_type:flag_meanings = "closed_edge, open_edge"

Mesh2_edge_type:grid_mapping = "crs"

Kanten

double Mesh2_edge_depth(time,nMesh2_edge) ;

Mesh2_edge_depth:standard_name = "sea_floor_depth_below_geoid" ;

Mesh2_edge_depth:long_name = "sea floor depth for 2D mesh edges" ;

Mesh2_edge_depth:units = "m" ;

Mesh2_edge_depth:coordinates = "Mesh2_edge_lon Mesh2_edge_lat" ;

Mesh2_edge_depth:_FillValue = fillvalue ;

Mesh2_edge_depth:valid_range = valid minimum, valid maximum ;

Mesh2_edge_depth:cell_methods = "nMesh2_edge: mean" ; \\ depth is constant along edge

Mesh2_edge_depth:grid_mapping = "crs"

Topografie

Es werden nur die Angaben für zeitvariable Topografie gemacht. Bei stationärer Topografie entfällt die Dimension time.

Knoten

double Mesh2_node_depth(time,nMesh2_node) ;

Mesh2_node_depth:standard_name = "sea_floor_depth_below_geoid" ;

Mesh2_node_depth:long_name = "sea floor depth at 2D mesh nodes" ;

Mesh2_node_depth:units = "m" ;

Mesh2_node_depth:coordinates = "Mesh2_node_lon Mesh2_node_lat" ;

Mesh2_node_depth:_FillValue = fillvalue ;

Mesh2_node_depth:valid_range = valid minimum, valid maximum ;

Mesh2_node_depth:cell_methods = "nMesh2_node: point" \\ depth is pointwise

Mesh2_node_depth:grid_mapping = "crs"

Kanten

double Mesh2_edge_depth(time,nMesh2_edge) ;

Mesh2_edge_depth:standard_name = "sea_floor_depth_below_geoid" ;

Mesh2_edge_depth:long_name = "sea floor depth for 2D mesh edges" ;

Mesh2_edge_depth:units = "m" ;

Mesh2_edge_depth:coordinates = "Mesh2_edge_lon Mesh2_edge_lat" ;

Mesh2_edge_depth:_FillValue = fillvalue ;

Mesh2_edge_depth:valid_range = valid minimum, valid maximum ;

Mesh2_edge_depth:cell_methods = "nMesh2_edge: mean" ; \\ depth is constant along edge

Mesh2_edge_depth:grid_mapping = "crs"

Polygone

double Mesh2_poly_depth(time,nMesh2_poly) ;

Mesh2_poly_depth:standard_name = "sea_floor_depth_below_geoid" ;

Mesh2_poly_depth:long_name = "sea floor depth for 2D mesh polygons" ;

Mesh2_poly_depth:units = "m" ;

Mesh2_poly_depth:coordinates = "Mesh2_node_lon Mesh2_node_lat" ;

Mesh2_poly_depth:_FillValue = fillvalue ;

Mesh2_poly_depth:valid_range = valid minimum, valid maximum ;

Mesh2_poly_depth:cell_methods = "nMesh2_poly: mean" ; \\ depth is constant within polygon

Mesh2_poly_depth:grid_mapping = "crs"

Wasserstand (Code = 3)

double node_water_level(time,node) ;

node_water_level:standard_name = "sea_surface_height_above_geoid" ;

node_water_level:long_name = "water level" ;

node_water_level:units = "m" ;

node_water_level:coordinates = "node_long_name node_lon node_lat"

node_water_level:_FillValue = "fillvalue"

node_water_level:valid_range = "valid minimum, valid maximum"

node_water_level:grid_mapping = "crs"

Zeitvariable Topografie (Code = 617)

double node_water_level(time,node) ;

node_depth:standard_name = "sea_floor_depth_below_geoid" ;

node_depth:long_name = "sea floor depth" ;

node_depth:units = "m" ;

node_depth:coordinates = "node_long_name node_lon node_lat"

node_depth:_FillValue = "fillvalue"

node_depth:valid_range = "valid minimum, valid maximum"

node_depth:grid_mapping = "crs"

Gesamtwassertiefe (Code = 16)

double node_water_depth(time,node) ;

node_water_depth:standard_name = "sea_floor_depth_below_sea_surface" ;

node_water_depth:long_name = "total water depth" ;

node_water_depth:units = "m" ;

node_water_depth:coordinates = "node_long_name node_lon node_lat"

node_water_depth:_FillValue = "fillvalue"

node_water_depth:valid_range = "valid minimum, valid maximum"

node_water_depth:grid_mapping = "crs"

Variablen mit Tiefenabhängigkeit

Salzgehalt (Code = 5)

double node_salinity(time,vedge) ;

node_salinity:standard_name = "sea_water_salinity" ;

node_salinity:long_name = "salinity" ;

node_salinity:units = "0.001" ;

node_salinity:coordinates = "node_long_name node_lon node_lat"

node_salinity:_FillValue = "fillvalue"

node_salinity:valid_range = "valid minimum, valid maximum"

node_salinity:cell_methods = "height: mean"

node_salinity:grid_mapping = "crs"

Strömungsgeschwindigkeit, x-Komponente (Code = 14)

double node_velocity_x(time,vedge) ;

node_velocity_x:standard_name = "sea_water_x_velocity" ; \\ or better eastward_sea_water_velocity

node_velocity_x:long_name = "current velocity in x-direction" ;

node_velocity_x:units = "m s-1" ;

node_velocity_x:coordinates = "node_long_name node_lon node_lat"

node_velocity_x:_FillValue = "fillvalue"

node_velocity_x:valid_range = "valid minimum, valid maximum"

node_velocity_x:cell_methods = "height: mean"

node_velocity_x:grid_mapping = "crs"

Strömungsgeschwindigkeit, y-Komponente (Code = 15)

double node_velocity_y(time,vedge) ;

node_velocity_y:standard_name = "sea_water_y_velocity" ; \\ or better northward_sea_water_velocity

... weitere Attribute analog zur x-Komponente der Strömungsgeschwindigkeit

Strömungsgeschwindigkeit, z-Komponente (Code = 1029)

double node_velocity_z(time,vedge) ;

node_velocity_z:standard_name = "upward_sea_water_velocity" ;

... weitere Attribute analog zur x-Komponente der Strömungsgeschwindigkeit

Schwebstoffgehalt, Gesamtmenge (Code = 7)

double node_suspended_matter(time,vedge) ;

node_suspended_matter:standard_name = "mass_concentration_of_suspended_matter_in_sea_water" ;

node_suspended_matter:long_name = "mass concentration of suspended sediments" ;

node_suspended_matter:units = "kg m-3" ;

node_suspended_matter:coordinates = "node_long_name node_lon node_lat"

node_suspended_matter:_FillValue = "fillvalue"

node_suspended_matter:valid_range = "valid minimum, valid maximum"

node_suspended_matter:cell_methods = "height: mean"

node_suspended_matter:grid_mapping = "crs"

Schwebstoffgehalt, Fraktionen (Code = 7)

double node_suspended_matter_classes(suspension_classes,time,vedge) ;

node_suspended_matter_classes:standard_name = "mass_concentration_of_suspended_matter_in_sea_water" ;

node_suspended_matter_classes:long_name = "mass concentration of suspended sediment fraction" ;

node_suspended_matter_classes:units = "kg m-3" ;

node_suspended_matter_classes:coordinates = "node_long_name node_lon node_lat"

node_suspended_matter_classes:_FillValue = "fillvalue"

node_suspended_matter_classes:valid_range = "valid minimum, valid maximum"

node_suspended_matter_classes:cell_methods = "height: mean"

node_suspended_matter_classes:grid_mapping = "crs"

Hilfsfelder

Kompression von height und node

integer vedge(vedge) ;

vedge:compress="height node"

Bezeichnung der Schwebstoffklassen

char suspended_matter_classes_long_name(suspension_classes,strlen1) ;

suspended_matter_classes_long_name:long_name = "long name of suspension class"

Anmerkungen, Fragen

• Datei ist vollständig CF-konform - keine Erweiterungen erforderlich!

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