Contribution to the atmospheric NH3 budget

Georgii, H.‐W.; Lenhard, U.

doi:10.1007/bf01636893

Cited by 37 publications

(3 citation statements)

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“…unity during P2, indicating a preference of atmospheric ammonia in particulate phase. Our value was comparable with those found elsewhere (for example, Georgii and Lenhard, 1978). The NH/NH/ ratio should be determined by the rate at which ammonia is tied to aerosol p<µticles following the production of sulfuric acid and nitric acid, relative to the rates of am monia supply and its removal from the atmosphere by precipitation.…”

Section: Gaseous Measurements By Annular Denuder Systemsupporting

confidence: 90%

A Preliminary Analysis of Chemical Characteristics of Atmospheric Pollutants and Their Deposition Budget on the Fu-shan Forest in Taiwan

Lin¹,

Lee²,

Chan

et al. 2000

Terr. Atmos. Ocean. Sci.

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This paper presents the chemical characteristics of atmospheric pol lutants measured at the Fu-Shan forest (620 m MSL) during two two-weeks field experiments held in the summer and winter of 1993. Chemical com positions of these atmospheric pollutants in solid, gaseous and liquid phases were analyzed. The deposition budget of S and N compounds through dry and wet deposition pathways were particularly assessed. As a result, aero sol mass spectra were found to be bimodal, having the 50% cut size< 1.0 µm and around 3.2 µm for fine and coarse modes, respectively. In summer, fine and coarse modes were primarily composed of ammonium sulfate and nitrate, respectively. But, in winter the coarse mode was dominated by sea salts due to the influence of northeast monsoon flows. Our average HN02 ( -0.10 ppb) was appreciably higher than those observed in clean tropo sphere, whereas HN03 was at a comparable level. Meanwhile, ammonia gas and particulate ammonium were at a lower concentration level com pared with those generally observed on the continental grounds. The S02 ( < 1 ppb) was comparable with those frequently observed in the free tropo sphere, while SO t was close to the lowest level typically obtained in urban areas. In addition, N03-which is thought to be associated with local pollu tion was limited. Therefore, we believe that excessive SOt, to a larger extent, was transported to the site via long-range transport, particularly in winter. With regard to the deposition budget, wet deposition pathway (>

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Section: Gaseous Measurements By Annular Denuder Systemsupporting

confidence: 90%

A Preliminary Analysis of Chemical Characteristics of Atmospheric Pollutants and Their Deposition Budget on the Fu-shan Forest in Taiwan

Lin¹,

Lee²,

Chan

et al. 2000

Terr. Atmos. Ocean. Sci.

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“…Ammonia has many terrestrial sources such as agriculture (Yamulki andHarrison, 1996, Schjoerring andMattsson, 2001), coal combustion (Silver et al, 1991) and biochemical processes in natural soils (Georgii and Lenhard, 1978). Agriculture is the major source of gaseous ammonia (NH 3 ), producing emissions through animal waste volatilization (Whitehead and Raistrick, 1990), fertilizer and manure application (Sommer et al, 1991;Hansen et al, 1998) and livestock grazing (Denmead et al, 1974;Jarvis and Pain, 1990).…”

Section: Introductionmentioning

confidence: 99%

Technical note: Laboratory evaluation of a tunable diode laser system for eddy covariance measurements of ammonia flux

Brodeur

Warland

Staebler

et al. 2009

Agricultural and Forest Meteorology

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“…NH, has also been detected in the atmosphere at an average concentration of 6 ppb in the troposphere (Robinson and Robbins, 1970). Its major source is probably biologic activity in the soil (Georgii and Lenhard, 1978), and by vertical transport it can be carried to stratospheric altitudes (McConnell, 1973). NH4Cl has been detected in stratospheric aerosol samples (Cadle, 1972).…”

Section: Introductionmentioning

confidence: 99%

Dynamics of NH₄Cl Particle Nucleation and Growth at 253–296 K

Henry

González

Peters

1982

Aerosol Science and Technology

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Particle dynamics in the NIZJ-HCI-N&CI particle system are modeled for particle growth times exceeding the induction time for the initial appearance of particles. The model results of Dahlin et al. at 2% K are confirmed, and the appropriate micmscopic surface free energy is found to he practically independent of reactant concentrations over small concentration ranges at 296 K. Over larger concentration ranges, the value of the surface free energy required to explain the data varies appreciably, increasing as initial reactant concentration increases. At relatively long particle growth times, diffusional growth together with coagulation adequately describes the experimental data, although the coagulation coefficient must he increased over the Brownian value to account for other effects. Possible mechanisms such as cluster scavenging, charge-induced coagulation, particle evaporation, and W C I vapor formation on reactor walls apparently do not affect the model predictions even at small particle growth times.

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Contribution to the atmospheric NH3 budget

Cited by 37 publications

References 5 publications

A Preliminary Analysis of Chemical Characteristics of Atmospheric Pollutants and Their Deposition Budget on the Fu-shan Forest in Taiwan

A Preliminary Analysis of Chemical Characteristics of Atmospheric Pollutants and Their Deposition Budget on the Fu-shan Forest in Taiwan

Technical note: Laboratory evaluation of a tunable diode laser system for eddy covariance measurements of ammonia flux

Dynamics of NH₄Cl Particle Nucleation and Growth at 253–296 K

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Contribution to the atmospheric NH3 budget

Cited by 37 publications

References 5 publications

A Preliminary Analysis of Chemical Characteristics of Atmospheric Pollutants and Their Deposition Budget on the Fu-shan Forest in Taiwan

A Preliminary Analysis of Chemical Characteristics of Atmospheric Pollutants and Their Deposition Budget on the Fu-shan Forest in Taiwan

Technical note: Laboratory evaluation of a tunable diode laser system for eddy covariance measurements of ammonia flux

Dynamics of NH4Cl Particle Nucleation and Growth at 253–296 K

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Dynamics of NH₄Cl Particle Nucleation and Growth at 253–296 K