Slayt 1 - RTC, Regional Training Centre - Turkey
Slayt 1 - RTC, Regional Training Centre - Turkey
Slayt 1 - RTC, Regional Training Centre - Turkey
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Sigma Coordinate System (σ)p• Defined as ; p= pressure level, p s =station pressureps• Bottom and top are levels where vertical motion are negligible• Bottom is near the earth’s surface (σ = 1.0)• Top is set to a very small pressure value (σ = 0.0) Near surface sigma levelsclosely mimic terrain Aloft sigma levels flattenout horizontally Sigma levels eliminateproblem of constant heightor pressure surfacesintersecting the ground