A review of the current status of knowledge on dry deposition

Wesely, M. L.

doi:10.1016/s1352-2310(99)00467-7

Cited by 811 publications

(597 citation statements)

References 159 publications

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“…The previous studies showed that the main controlling factors of V d were radiation, air temperature, friction velocity, vapor pressure deficit, soil moisture, and phenology (Wesely and Hicks, 2000;Kurpius et al, 2002;Turnipseed et al, 2009;Zona et al, 2014). In our study, we found that there were obvious positive correlations between V d and both global radiation (Q) and friction velocity (u*) during the growing stage (Fig.…”

Section: Relationship Between V D and Environmental Variablessupporting

confidence: 63%

“…(1) is to maintain a positive V d , because O 3 flux is always directed downward (negative). V d can be understood as the normalized O 3 flux, and is often used to compare deposition characteristics at different surfaces (Wesely and Hicks, 2000;Fowler et al, 2009). The raw O 3 flux F o_raw (nmol/(m 2 ·sec)) can be given as:…”

Section: Eddy Covariance O 3 Flux Calculation and Data Post-processingmentioning

confidence: 99%

“…Generally, abiotic surfaces with very little organic matter (e.g., desert or snow) have a deposition velocity on the order of 0.1 cm/sec or less (Güsten et al, 1996;Wesely and Hicks, 2000). The relatively large daytime V d (~0.4 cm/sec) in March (V d 3) might be driven by the chemical reaction of O 3 with NO and other gases emitted from soil as well as stomata uptake of O 3 (Zona et al, 2014).…”

Section: Mean Diurnal Variations Of Deposition Velocitymentioning

confidence: 99%

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Ozone concentrations, flux and potential effect on yield during wheat growth in the Northwest-Shandong Plain of China

Zhu

Sun

Zhao

et al. 2015

Journal of Environmental Sciences

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Section: Relationship Between V D and Environmental Variablessupporting

confidence: 63%

Section: Eddy Covariance O 3 Flux Calculation and Data Post-processingmentioning

confidence: 99%

Section: Mean Diurnal Variations Of Deposition Velocitymentioning

confidence: 99%

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Ozone concentrations, flux and potential effect on yield during wheat growth in the Northwest-Shandong Plain of China

Zhu

Sun

Zhao

et al. 2015

Journal of Environmental Sciences

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“…[12] The concept of dry deposition is discussed extensively in several review articles, one of the most recent by Wesely and Hicks [2000]. Briefly, the deposition velocity v d of a compound i is defined by concentration C i and flux F i of the selected compound according to…”

Section: Calculation Of Deposition Velocitiesmentioning

confidence: 99%

“…Models to estimate dry deposition are parameterized using concentration measurements and deposition velocities which are calculated from resistance models that are based on meteorological conditions and surface properties [Hicks et al, 1987]. The performance of these models for less explored compounds (e.g., BVOCs) is weak, especially over complex terrain [Wesely and Hicks, 2000], and it is thus uncertain to which extent deposition processes play a role under field conditions for individual compounds. According to Fick's law of diffusion, the VOC exchange between biosphere and atmosphere should be bidirectional depending on the concentration gradient between ambient air and the leaf interior.…”

Section: Introductionmentioning

confidence: 99%

Deposition fluxes of terpenes over grassland

et al. 2011

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[1] Eddy covariance flux measurements were carried out for two subsequent vegetation periods above a temperate mountain grassland in an alpine valley using a proton-transfer-reaction-mass spectrometer (PTR-MS) and a PTR time-of-flight-mass spectrometer (PTR-TOF). In 2008 and during the first half of the vegetation period 2009 the volume mixing ratios (VMRs) for the sum of monoterpenes (MTs) were typically well below 1 ppbv and neither MT emission nor deposition was observed. After a hailstorm in July 2009 an order of magnitude higher amount of terpenes was transported to the site from nearby coniferous forests causing elevated VMRs. As a consequence, deposition fluxes of terpenes to the grassland, which continued over a time period of several weeks without significant reemission, were observed. For days without precipitation the deposition occurred at velocities close to the aerodynamic limit. In addition to monoterpene uptake, deposition fluxes of the sum of sesquiterpenes (SQTs) and the sum of oxygenated terpenes (OTs) were detected. Considering an entire growing season for the grassland (i.e., 1 April to 1 November 2009), the cumulative carbon deposition of monoterpenes reached 276 mg C m −2 . This is comparable to the net carbon emission of methanol (329 mg C m −2 ), which is the dominant nonmethane volatile organic compound (VOC) emitted from this site, during the same time period. It is suggested that deposition of monoterpenes to terrestrial ecosystems could play a more significant role in the reactive carbon budget than previously assumed.

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Observations of linear dependence between sulfate and nitrate in atmospheric particles

et al. 2014

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Hourly measurements of water-soluble inorganic ionic species in ambient atmospheric particles were conducted at Shanghai, Hangzhou, and Guangzhou sampling sites in China during the period of 2009-2011. The relation between sulfate and nitrate in particulate matter (PM 10 and PM 2.5 ) was examined based on these measurements. Results showed that the mass fraction of sulfate was strongly negatively correlated with that of nitrate in atmospheric particles on most of the sampling days, especially when sulfate and nitrate made up the vast majority of the total soluble anions and cations (Na + , K + , Ca 2+ , and Mg 2+ ) made a small contribution to the total water-soluble ions, revealing that the formation mechanisms of sulfate and nitrate in the atmosphere are highly correlated, and there exists a significant negative correlation trend between sulfate and nitrate mass fractions in the atmospheric particles. We found that local meteorological conditions presented opposite influences on the mass fractions of sulfate and nitrate. Further analysis indicated that the two mass fractions were modulated by the neutralizing level of atmospheric aerosols, and the negative correlation could be found in acidic atmospheric particles. Strong negative correlation was usually observed on clear days, hazy days, foggy days, and respirable particulate air pollution days, whereas poor negative correlation was often observed during cloud, rain, snow, dust storm, and suspended dust events. The results can help to better understand the formation mechanisms of atmospheric sulfate and nitrate during air pollution episodes and to better explain field results of atmospheric chemistry concerning sulfate and nitrate.

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A review of the current status of knowledge on dry deposition

Cited by 811 publications

References 159 publications

Ozone concentrations, flux and potential effect on yield during wheat growth in the Northwest-Shandong Plain of China

Ozone concentrations, flux and potential effect on yield during wheat growth in the Northwest-Shandong Plain of China

Deposition fluxes of terpenes over grassland

Observations of linear dependence between sulfate and nitrate in atmospheric particles

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