Value Ranges
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In order to make all graphics for any specific parameter to achieve the same "look" (thus allowing animations and direct visual comparisons), fixed value ranges and color scales must be applied when geo-images are developed.  This requires a canonical set of value ranges for the important met-ocean parameters.

PARAMETER UNIT MINIMUM MAXIMUM SCALE SAGA STRETCH FACTOR
Temperature C -3 35    
SST (per NASA) C -2 45    
Salinity   0 44    
Oxygen ml/l 0 12    
Phosphate umole/dm3 0 4 Log upward 100
Nitrate umole/dm3 0 60 Log upward 100
Silicate umole/dm3 0 180? Log upward 100
pH   7.0 9.1    
Chlorophyll ug/dm3 or mg/m3 0 64 (NASA) Log upward 1000
Population density persons/km2 1 300 Log upward 100
Air Pressure, Sea Level millibar (mb) 960 1050    
Precipitation, by month mm/day 0 70 Log upward 100
Air temperature C 0 50    
Humidity, relative % 0 100    
Humidity, specific g/kg 0 30    
Sediment thickness m 0 15000 Log upward 100
Diffuse attenuation coefficient (K490) m-1 0 6.4 Log (per NASA)  
Secchi Disk Depth m 0 75    
Compensation Depth for Photosynthesis (estimated from K490 at the surface, or from Secchi disk depths) m 0 250    
Photosynthetically active radiation (PAR)) uEin/m2/day 0 64    
Relief of the Earth Surface - Atlantic & Indian m -8700 (Puerto Rico Trench) 8900 (Mt. Everest)    
Relief of the Earth Surface - All Oceans m -11000 (Mindanao Trench) 8900 (Mt. Everest)    
Composite Runoff mm/month 0 3000 Log upward 100