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Temperature Inversions on Atmospheric Soundings Frontal Inversion • Usually not surface based • Temp and Dewpoint both typically increase through the inversion layer • Typically a significant wind shift across the inversion layer • Located on the “cool” side of frontal boundaries (ahead of a warm front, behind a cold front) Radiation Inversion • Surface-Based and Shallow • Temp and Dewpoint both typically increase through the inversion layer • Associated with calm to light winds at the surface • Usually found on a 12Z sounding, but occasionally found on a 00Z sounding • Associated with significant surface radiational cooling Subsidence Inversion • Usually not surface-based, occasionally can be • Temp warms while the Dewpoint cools (Dewpoint Depression increases) • Associated with subsidence (sinking air) in which the temperature warms at or near the dry adiabatic lapse rate Determine the Inversion 00Z - IAD 12Z - IAD 00Z - IAD 12Z-GSO 00Z - IAD
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