Biosphere/Atmosphere interactions: Integrated research in a European coniferous forest ecosystem

Enders, G.; Dlugi, R.; Steinbrecher, R.; Clement, B.; Daiber, R.; Eijk, J. van; Gäb, Siegmar; Haziza, M.; Helas, G.; Herrmann, Uwe; Kessel, M.; Kesselmeier, J.; Kotzias, D.; Kourtidis, K.; Kurth, H; McMillen, R. T.; Roider, G; Schürmann, W.; Teichmann, Ulrich; Torres, L.

doi:10.1016/0960-1686(92)90269-q

Cited by 84 publications

(40 citation statements)

References 32 publications

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“…Further, the near-surface source persists through both day and night, while biogenic lightdependent emissions typically cease during the night when stomata are closed and photosynthesis has stopped. Soil emissions are another plausible source of alkanoic acids, but typically thought to be minor (Sanhueza and Andreae, 1991;Enders et al, 1992). We thus expect that biogenic sources of the alkanoic acids were minor during the campaign.…”

Section: Alkanoic Acidsmentioning

confidence: 99%

“…Several organic acids have been identified in vegetative emissions (Kesselmeier et al, 1998;Kesselmeier, 2001), soil emissions (Sanhueza and Andreae, 1991;Enders et al, 1992), and biomass burning (Goode et al, 2000). Automobile exhaust is also a primary source of alkanoic acids, with formic (CH 2 O 2 ) and acetic (C 2 H 4 O 2 ) acids typically being the most abundant in these emissions (Kawamura et al, 1985(Kawamura et al, , 2000Friedman et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

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Tropospheric sources and sinks of gas-phase acids in the Colorado Front Range

et al. 2018

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Abstract. We measured organic and inorganic gas-phase acids in the Front Range of Colorado to better understand their tropospheric sources and sinks using a high-resolution time-of-flight chemical ionization mass spectrometer. Measurements were conducted from 4 to 13 August 2014 at the Boulder Atmospheric Observatory during the Front Range Air Pollution and Photochemistry Éxperiment. Diurnal increases in mixing ratios are consistent with photochemical sources of HNO 3 , HNCO, formic, propionic, butyric, valeric, and pyruvic acid. Vertical profiles taken on the 300 m tower demonstrate net surface-level emissions of alkanoic acids, but net surface deposition of HNO 3 and pyruvic acid. The surface-level alkanoic acid source persists through both day and night, and is thus not solely photochemical. Reactions between O 3 and organic surfaces may contribute to the surface-level alkanoic acid source. Nearby traffic emissions and agricultural activity are a primary source of propionic, butyric, and valeric acids, and likely contribute photochemical precursors to HNO 3 and HNCO. The combined diel and vertical profiles of the alkanoic acids and HNCO are inconsistent with dry deposition and photochemical losses being the only sinks, suggesting additional loss mechanisms.

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Section: Alkanoic Acidsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Tropospheric sources and sinks of gas-phase acids in the Colorado Front Range

et al. 2018

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“…As fontes naturais de ácidos orgânicos mais relevantes para a atmosfera são o solo e a vegetação 18,31,45,46 . Os produtos do metabolismo de microorganismos, por exemplo bactérias, e plantas são os responsáveis pela ocorrência de ácidos orgâni-cos no solo 45 .…”

Section: Fontes Naturaisunclassified

“…Os produtos do metabolismo de microorganismos, por exemplo bactérias, e plantas são os responsáveis pela ocorrência de ácidos orgâni-cos no solo 45 . Em regiões suburbanas e florestais, o impacto ambiental de ácidos orgânicos por esta fonte de emissão tem despertado grande interesse 46 . No entanto, a contribuição do solo como fonte destas espécies na atmosfera não está ainda bem esclarecida e estudos mais detalhados são necessários.…”

Section: Fontes Naturaisunclassified

Origem e implicações dos ácidos carboxílicos na atmosfera

Souza

Carvalho

2001

Quím. Nova

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“…Possible sources of organic acids in the atmosphere and several mechanisms for their production have been proposed, but there is, at present, considerable uncertainty about them [10][11][12][13][14] .The influx of organic acids into the atmosphere has been associated with vehicle exhaust emissions, as well as other anthropogenic sources 15,16 , biogenic direct and/or secondary emissions [17][18][19] , and in situ formation reactions, specially, the photochemical oxidation of precursor organic species in the gas or aqueous phase 20 . Natural sources, such as soil and vegetation, introduce organic acids to the atmosphere 21 .…”

Section: Introductionmentioning

confidence: 99%

Seasonality Influence in the Distribution of Formic and Acetic Acids in the Urban Atmosphere of São Paulo City, Brazil

Souza

Carvalho

2001

J. Braz. Chem. Soc.

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Níveis ambientais diurnos de ácido fórmico e acético foram medidos na atmosfera da cidade de São Paulo no inverno e na primavera de 1996. Foi feita uma comparação das concentrações dos ácidos carboxílicos entre dois sítios urbanos distintos. Os resultados demonstraram que os níveis de ácidos carboxílicos foram afetados pela variação sazonal no sítio com contribuição alta de emissão veicular enquanto que no outro sítio estudado não foi observada esta influência. As concentrações variaram de 0,64 a 11,8 ppbv para ácido fórmico e 0,51 a 10,7 ppbv para ácido acético. Os dados obtidos foram discutidos em relação à emissão direta e a produção fotoquímica in situ.Ambient levels and diurnal profiles of formic and acetic acids were measured in the atmosphere of São Paulo City in winter and spring 1996. A comparison between two different urban sites was done. Results demonstrate that carboxylic acid levels were affected by seasonality in the site with high vehicular emission density, while no seasonal influence was observed for the other site studied. Ranges of mixing ratios from 0.64 to 11.8 ppbv for formic acid and 0.51 to 10.7 ppbv for acetic acid were recorded. The results concerning the carboxylic acid concentrations were discussed with respect to direct emission and in situ photochemical production.

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Biosphere/Atmosphere interactions: Integrated research in a European coniferous forest ecosystem

Cited by 84 publications

References 32 publications

Tropospheric sources and sinks of gas-phase acids in the Colorado Front Range

Tropospheric sources and sinks of gas-phase acids in the Colorado Front Range

Origem e implicações dos ácidos carboxílicos na atmosfera

Seasonality Influence in the Distribution of Formic and Acetic Acids in the Urban Atmosphere of São Paulo City, Brazil

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