141
While HF radar antennae emplacement is preferably close to the seashore,
emplacement on adjoining private or public property may ease the regulatory permit
load. A provisional blanket license may be issued for commercial directional HF
radio emission but interference with other higher priority signals can precipitate
revocation.
8.2.3 Selection, Sub-sampling, and Optimization of Satellite
Imagery
Satellite imagery allows the synoptic visualization of dynamic events such as the
onset, course and abatement of upwelling events, river plume dispersal, red tide
occurrence, and sea ice dynamics at the coastal scale. Moreover, the satellite data
underpinning these graphical representations is assimilated by numerical models
allowing increased confidence in model forecasts. Access to recurrent operational
satellite data for sea surface temperature, ocean color, and derived products such as
near surface Chl a, CDOM custom in the ICOOS area of influence is normally forthcoming from NASA, NOAA, EUMETSAT, their Indian and Japanese counterparts
and commercial operators, but significant data processing is usually necessary to
develop graphical products for the local scale responsive to the full range of variability of regional features.
The geographical limits of the region of interest must be established so that code
may be written to extract the pertinent data subset. Likewise, the regional variability range of these features (temperature, or Chl a, for example) must be established
in order to constrain the color pallet to the regional range. In tropical regions, for
example, a temperature color pallet ranging below about 20 °C will result in a featureless depiction and conversely so if high temperature brackets are allowed in
temperate or arctic regions.
8.2.4 Selection and Design of Numerical Model
Implementations
Choice of numerical models for incorporation of model output into the data suite
served by an observing system will be informed by data needs ascertained during
the stakeholder engagement process. While the basic model code will be easily
available, several preliminary steps must be taken prior to model implementation.
Local bathymetry is a powerful constraint to model domain delimitation since the
boundary between the regional model and the parent global circulation model
(GCM) should extend beyond the shelf edge into deep water so as to avoid spurious
effects due to reduced performance of the GCM in shallow waters with complicated
bathymetry. Model grid construction is guided by the opposing necessities for
8.2 Planning Coastal Ocean Observing Systems
While HF radar antennae emplacement is preferably close to the seashore,
emplacement on adjoining private or public property may ease the regulatory permit
load. A provisional blanket license may be issued for commercial directional HF
radio emission but interference with other higher priority signals can precipitate
revocation.
8.2.3 Selection, Sub-sampling, and Optimization of Satellite
Imagery
Satellite imagery allows the synoptic visualization of dynamic events such as the
onset, course and abatement of upwelling events, river plume dispersal, red tide
occurrence, and sea ice dynamics at the coastal scale. Moreover, the satellite data
underpinning these graphical representations is assimilated by numerical models
allowing increased confidence in model forecasts. Access to recurrent operational
satellite data for sea surface temperature, ocean color, and derived products such as
near surface Chl a, CDOM custom in the ICOOS area of influence is normally forthcoming from NASA, NOAA, EUMETSAT, their Indian and Japanese counterparts
and commercial operators, but significant data processing is usually necessary to
develop graphical products for the local scale responsive to the full range of variability of regional features.
The geographical limits of the region of interest must be established so that code
may be written to extract the pertinent data subset. Likewise, the regional variability range of these features (temperature, or Chl a, for example) must be established
in order to constrain the color pallet to the regional range. In tropical regions, for
example, a temperature color pallet ranging below about 20 °C will result in a featureless depiction and conversely so if high temperature brackets are allowed in
temperate or arctic regions.
8.2.4 Selection and Design of Numerical Model
Implementations
Choice of numerical models for incorporation of model output into the data suite
served by an observing system will be informed by data needs ascertained during
the stakeholder engagement process. While the basic model code will be easily
available, several preliminary steps must be taken prior to model implementation.
Local bathymetry is a powerful constraint to model domain delimitation since the
boundary between the regional model and the parent global circulation model
(GCM) should extend beyond the shelf edge into deep water so as to avoid spurious
effects due to reduced performance of the GCM in shallow waters with complicated
bathymetry. Model grid construction is guided by the opposing necessities for
8.2 Planning Coastal Ocean Observing Systems