On the distribution of ammonia in the middle and lower troposphere

H. W. Georgii; W. J. Müller

doi:10.3402/tellusa.v26i1-2.9770

On the distribution of ammonia in the middle and lower troposphere

Tellus

Volume 26 (1974): Issue 1-2

By: H. W. Georgii and W. J. Müller

Open Access

|Jan 1974

Abstract

Ammonia has been measured under “pure air” conditions applying the Indophenol blue method after Bertheolot. Aircraft-ascents show a remarkable decrease of the NH3-concentration when proceeding from the continent to the ocean. A number of aircraft-ascents were made to investigate the vertical distribution of on NH₃ and NH₄⁺ They revealed a sharp decrease of the concentration in the ground layer of the troposphere approaching a constant concentration above 2 km altitude. Winter and summer values at 3 km altitude were around 1 μg/m³ NH₃ and 4 μg/m³ NH₃ respectively. Some conclusions on the formation of (NH₄)₂ SO₄-aerosols are drawn on the basis of the results obtained.

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