Evaluation of ammonia fluxes into the free atmosphere over Western Germany

The upward flux densities of gaseous ammonia and particulate ammonium through a layer 400 m above ground were determined by aircraft measurements over a rural area in Western Germany. The flux densities were calculated according to the gradient method. The fluxes amounted to 118 ± 49 ?g/m 2 h NH 3 -N and 93 ± 47 ?g/m 2 h NH + 4 -N in summer and to 7 ± 14 ?g/m2h NH3-N and 23 ± 34 ?g/m 2 h NH + 4 -N in winter. When integrated over a year, the sum of these ammonia fluxes can be maintained by NH 3 volatilization from domestic animal excrements. The NH3 liberation from mineral fertilizer and natural soils contributes only a small amount to the overall production rate. Most of the NH 3 and NH + 4 diffusing upwards into the middle troposphere will eventually be incorporated in rain. For the conversion of gaseous NH 3 to particulate NH + 4 in the first 400 m of the atmosphere a lower limit for a pseudo first-order reaction rate constant of 1–2 × 10 -5 s -1 was deduced from flux density considerations. DOI: 10.1111/j.2153-3490.1980.tb01721.x

[1]  C. M. Sadowski,et al.  Absolute rate constant for the reaction of CH with O2 , 1979 .

[2]  B. W. Doak.  Some chemical changes in the nitrogenous constituents of urine when voided on pasture , 1952, The Journal of Agricultural Science.

[3]  R. A. Perry,et al.  Rate constants for the reactions OH+H2S→H2O+SH and OH+NH3 →H2O+NH2 over the temperature range 297–427 °K , 1976 .

[4]  H. D. Hoop,et al.  NITROGEN LOSSES DURING NITRIFICATION IN SOLUTIONS AND IN ACID SANDY SOILS , 1957 .

[5]  S. Datta,et al.  Ammonia Volatilization Losses from Flooded Rice Soils , 1978 .

[6]  J. Freney,et al.  A closed ammonia cycle within a plant canopy , 1976 .

[7]  F. Stuhl.  Absolute rate constant for the reaction OH+NH3→NH2+H2O , 1973 .

[8]  H. Georgii,et al.  Contribution to the atmospheric NH3 budget , 1978 .

[9]  H. Mckay,et al.  Ammonia and ammonium sulfate in the troposphere over the United Kingdom , 1970 .

[10]  D. Kissel,et al.  Ammonia Volatilization from Surface Applications of Ammonium Compounds on Calcareous Soils: II. Effects of Temperature and Rate of Ammonium Nitrogen Application1 , 1974 .

[11]  F. Allison.  The Enigma of Soil Nitrogen Balance Sheets , 1955 .

[12]  G. L. Hutchinson,et al.  Atmospheric Ammonia: Absorption by Plant Leaves , 1972, Science.

[13]  K. Nehring.  Lehrbuch der Tierernährung und Futtermittelkunde , 1959 .

[14]  K. Felix,et al.  Handbuch der Ernährung und des Stoffwechsels der landwirtschaftlichen Nutztiere als Grundlagen der Fütterungslehre, 1. Band: Nährstoffe und Futtermittel , 1929 .

[15]  E. Eriksson.  Composition of Atmospheric Precipitation , 1952 .

[16]  Gary A. Peterson,et al.  Ammonia Nitrogen Losses from Simulated Plowing of Native Sods 1 , 1973 .

[17]  G. A. Dawson.  Atmospheric ammonia from undisturbed land , 1977 .

[18]  H. Georgii.  Oxides of nitrogen and ammonia in the atmosphere , 1963 .

[19]  D. Satchell,et al.  Gaseous Loss of Ammonia from Nitrogen Fertilizers Applied to Soils1 , 1960 .

[20]  R. C. Robbins,et al.  Gaseous nitrogen compound pollutants from urban and natural sources , 1970 .

[21]  T. N. Jewitt.  LOSS OF AMMONIA FROM AMMONIUM SULFATE APPLIED TO ALKALINE SOILS , 1942 .

[22]  Sharon S. Wu.  A study of heat transfer coefficients in the lowest 400 meters of the atmosphere , 1965 .

[23]  R. A. Cox,et al.  The photo-oxidation of ammonia in the presence of NO and NO2 , 1975 .

[24]  E. Eriksson.  Composition of Atmospheric Precipitation: I. Nitrogen compounds , 1952 .