Precipitation scavenging of gaseous pollutants having arbitrary solubility in inhomogeneous atmosphere

Elperin, T.; Fominykh, Andrew; Krasovitov, Boris

doi:10.1007/s00703-014-0358-9

Cited by 3 publications

(6 citation statements)

References 35 publications

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“…The below-cloud wet deposition is a washout process through impact or diffusion with raindrops. With respect to SO 2 , the washout rate has a typical magnitude of ∼ 10 −5 s −1 (Maul, 1978;Martin, 1984;Elperin et al, 2015). Here, we set the parameters for SO 2 to a = 2 × 10 −5 and b = 0.616, which follows the settings in the FLEXPART model (Pisso et al, 2019).…”

Section: Wet Depositionmentioning

confidence: 99%

Improved representation of volcanic sulfur dioxide depletion in Lagrangian transport simulations: a case study with MPTRAC v2.4

Liu¹,

Hoffmann²,

Grießbach³

et al. 2023

Preprint

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Abstract. The lifetime of sulfur dioxide (SO2) in the Earth's atmosphere varies from orders of hours to weeks, mainly depending on whether cloud water is present or not. The volcanic eruption on Ambae Island, Vanuatu, in July 2018 injected a large amount of SO2 into the upper troposphere and lower stratosphere (UT/LS) region with abundant cloud cover. In-cloud removal is therefore expected to play an important role during long-range transport and dispersion of SO2. In order to better represent the rapid decay processes of SO2 observed by the Atmospheric InfraRed Sounder (AIRS) and the TROPOspheric Monitoring Instrument (TROPOMI) in Lagrangian transport simulations, we simulate the SO2 decay in a more realistic manner compared to our earlier work, considering gas phase hydroxyl (OH) chemistry, aqueous phase hydrogen peroxide (H2O2) chemistry, wet deposition, and convection. The either newly developed or improved chemical and physical modules are implemented in the Lagrangian transport model Massive-Parallel Trajectory Calculations (MPTRAC) and tested in a case study for the July 2018 Ambae eruption. To access the dependencies of SO2 lifetime on the complex atmospheric conditions, sensitivity tests are conducted by tuning the control parameters, changing the release height, predefined OH climatology data, the cloud pH value, the cloud cover and other. Wet deposition and aqueous phase H2O2 oxidation remarkably increased the decay rate of the SO2 total mass, which leads to a rapid and more realistic depletion of the Ambae plume. The improved representation of chemical and physical of SO2 loss processes described here is expected to lead to more realistic Lagrangian transport simulations of volcanic eruption events with MPTRAC in future work.

show abstract

Section: Wet Depositionmentioning

confidence: 99%

Improved representation of volcanic sulfur dioxide depletion in Lagrangian transport simulations: a case study with MPTRAC v2.4

Liu¹,

Hoffmann²,

Grießbach³

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…The initial vertical distributions of temperature and soluble trace gas concentration in the atmosphere are assumed to be known. Since the concentration of soluble chemically active trace gases in the atmosphere is very low (of the order of 1 ppbv), chemical gas absorption and inhomogeneous concentration distribution in the gaseous phase do not affect temperature distribution in the gaseous and liquid phases (see Elperin et al 2015a). At the same time, the influence of the inhomogeneous temperature distribution in the atmosphere on the rate of chemical gas absorption by falling droplets is significant since the solubility parameter m and the constant of the first-order chemical reaction k ch1 are temperature-dependent.…”

Section: Introductionmentioning

confidence: 99%

“…first-order and higher orders irreversible chemical reactions in a liquid phase, dependence of constants of chemical reactions on temperature and changing pH in the rain droplets during gas absorption. In our previous study (Elperin et al 2015a) we investigated different regimes of scavenging of soluble trace gases by physical absorption. In particular, we investigated scavenging of moderately soluble trace gases, when the velocities of scavenging and temperature fronts are of the same order, U C0 * U T ; scavenging of gases having low solubility, when U C0 \ \ U T ; and scavenging of gases having high solubility, when U C0 [[ U T .…”

Section: Introductionmentioning

confidence: 99%

“…For low gradient of concentration of soluble gas in the gaseous phase the expression for the total concentration of soluble gaseous pollutant in gaseous and liquid phases reads (see, e.g. Elperin et al 2015a):…”

Section: Introductionmentioning

confidence: 99%

“…where Elperin et al 2015a). Taking into account the linear dependence of the solubility parameter m on temperature, m = m 0 -k 1 (T -T 0 ) and using Eq.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Wet precipitation scavenging of soluble atmospheric trace gases due to chemical absorption in inhomogeneous atmosphere

Elperin

Fominykh

Krasovitov

2016

Meteorol Atmos Phys

Self Cite

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We analyze the effects of irreversible chemical reactions of the first and higher orders and aqueous-phase dissociation reactions on the rate of trace gas scavenging by rain in the atmosphere with non-uniform concentration and temperature. We employ an one-dimensional model of precipitation scavenging of chemically active soluble gaseous pollutants that is valid for small gradients of temperature and concentration in the atmosphere. It is demonstrated that transient altitudinal distribution of concentration under the influence of rain is determined by the partial hyperbolic differential equation of the first order.

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Improved representation of volcanic sulfur dioxide depletion in Lagrangian transport simulations: a case study with MPTRAC v2.4

Liu,

Hoffmann,

Griessbach

et al. 2023

Geosci. Model Dev.

View full text Add to dashboard Cite

Abstract. The lifetime of sulfur dioxide (SO2) in the Earth's atmosphere varies from orders of hours to weeks, mainly depending on whether cloud water is present or not. The volcanic eruption on Ambae Island, Vanuatu, in July 2018 injected a large amount of SO2 into the upper troposphere and lower stratosphere (UT/LS) region with abundant cloud cover. In-cloud removal is therefore expected to play an important role during long-range transport and dispersion of SO2. In order to better represent the rapid decay processes of SO2 observed by the Atmospheric Infrared Sounder (AIRS) and the TROPOspheric Monitoring Instrument (TROPOMI) in Lagrangian transport simulations, we simulate the SO2 decay in a more realistic manner compared to our earlier work, considering gas-phase hydroxyl (OH) chemistry, aqueous-phase hydrogen peroxide (H2O2) chemistry, wet deposition, and convection. The either newly developed or improved chemical and physical modules are implemented in the Lagrangian transport model Massive-Parallel Trajectory Calculations (MPTRAC) and tested in a case study for the July 2018 Ambae eruption. To access the dependencies of the SO2 lifetime on the complex atmospheric conditions, sensitivity tests are conducted by tuning the control parameters, e.g., by changing the release height, the predefined OH climatology data, the cloud pH value, the cloud cover, and other variables. Wet deposition and aqueous-phase H2O2 oxidation remarkably increased the decay rate of the SO2 total mass, which leads to a rapid and more realistic depletion of the Ambae plume. The improved representation of chemical and physical SO2 loss processes described here is expected to lead to more realistic Lagrangian transport simulations of volcanic eruption events with MPTRAC in future work.

show abstract

Precipitation scavenging of gaseous pollutants having arbitrary solubility in inhomogeneous atmosphere

Cited by 3 publications

References 35 publications

Improved representation of volcanic sulfur dioxide depletion in Lagrangian transport simulations: a case study with MPTRAC v2.4

Improved representation of volcanic sulfur dioxide depletion in Lagrangian transport simulations: a case study with MPTRAC v2.4

Wet precipitation scavenging of soluble atmospheric trace gases due to chemical absorption in inhomogeneous atmosphere

Improved representation of volcanic sulfur dioxide depletion in Lagrangian transport simulations: a case study with MPTRAC v2.4

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