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"

Kennzeichnung von Positionen für die Randwertsteuerung

Text fehlt noch.

Aktuelle (zeitvariable) 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"

Maximal zulässige Tiefe

• Vollständig analog zu Aktuelle Tiefe vorgehen, jedoch ohne Dimension time.
• Vorschlag für die Namensgebung:
  1. Knoten: "Mesh2_node_max_depth(nMesh2_node)" ;
  2. Kanten: "Mesh2_edge_max_depth(nMesh2_edge)" ;
  3. Polygone: "Mesh2_poly_max_depth(nMesh2_poly)" .

Weitere Daten ohne Tiefenabhängigkeit

Wasserstand

Typischer Weise liegt der Wasserstand entweder (punktweise) am Knoten oder konstant im Polygon vor.

Knoten

double Mesh2_node_water_level(time,nMesh2_node) ;

Mesh2_node_water_level:standard_name = "sea_surface_height_above_geoid" ;

Mesh2_node_water_level:long_name = "water level" ;

Mesh2_node_water_level:units = "m" ;

Mesh2_node_water_level:coordinates = "Mesh2_node_lon Mesh2_node_lat" ;

Mesh2_node_water_level:_FillValue = fillvalue ;

Mesh2_node_water_level:valid_range = valid minimum, valid maximum

Mesh2_node_water_level:cell_methods = "nMesh2_node: point"

Mesh2_node_water_level:grid_mapping = "crs"

Polygon

double Mesh2_poly_water_level(time,nMesh2_poly) ;

Mesh2_poly_water_level:standard_name = "sea_surface_height_above_geoid" ;

Mesh2_poly_water_level:long_name = "water level" ;

Mesh2_poly_water_level:units = "m" ;

Mesh2_poly_water_level:coordinates = "Mesh2_poly_lon Mesh2_poly_lat" ;

Mesh2_poly_water_level:_FillValue = fillvalue ;

Mesh2_poly_water_level:valid_range = valid minimum, valid maximum

Mesh2_poly_water_level:cell_methods = "nMesh2_poly: mean"

Mesh2_poly_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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