2020
DOI: 10.5194/acp-20-12193-2020
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Deep-convective influence on the upper troposphere–lower stratosphere composition in the Asian monsoon anticyclone region: 2017 StratoClim campaign results

Abstract: Abstract. The StratoClim stratospheric aircraft campaign took place in summer 2017 in Nepal (27 July–10 August) and provided for the first time a wide dataset of observations of air composition inside the Asian monsoon anticyclone (AMA). In the framework of this project, with the purpose of modelling the injection of pollutants and natural compounds into the stratosphere, we performed a series of diffusive back trajectory runs along the flights' tracks. The availability of in situ measurements of trace gases h… Show more

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Cited by 40 publications
(66 citation statements)
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“…Deep convection can affect trace gas concentrations in the upper troposphere which was, for example, shown by Dickerson et al (1987), who reported increased concentrations of NO, CO, O 3 and other reactive species in a thunderstorm outflow over the Midwestern United Stated in 1985, and Barth et al (2015), with the latter based on observations during the DC3 (Deep Convective Clouds and Chemistry) field campaign. Similar observations were made by Bucci et al (2020), who reported convective uplift in the upper troposphere/lower stratosphere based on the StratoClim aircraft campaign over Nepal in 2017. It is usually observed along with lightning.…”
Section: Introductionsupporting
confidence: 87%
See 1 more Smart Citation
“…Deep convection can affect trace gas concentrations in the upper troposphere which was, for example, shown by Dickerson et al (1987), who reported increased concentrations of NO, CO, O 3 and other reactive species in a thunderstorm outflow over the Midwestern United Stated in 1985, and Barth et al (2015), with the latter based on observations during the DC3 (Deep Convective Clouds and Chemistry) field campaign. Similar observations were made by Bucci et al (2020), who reported convective uplift in the upper troposphere/lower stratosphere based on the StratoClim aircraft campaign over Nepal in 2017. It is usually observed along with lightning.…”
Section: Introductionsupporting
confidence: 87%
“…Roux et al (2020) found the convective uplift of boundary layer air as well as the inflow of lower stratospheric air to the upper troposphere based on measurements of CO, O 3 and H 2 O during aircraft typhoon observations over Taipei in 2016. In contrast, studies of lightning activity within convective systems over the ocean and in tropical cyclones are predominantly based on satellite data and ground-based observations from the WWLLN (University of Washington, 2020; Abreu et al, 2010;Bürgesser, 2017;Hutchins et al, 2012b;Bucsela et al, 2019) Generally, data from in situ chemical measurements in the upper troposphere are sparse, and to our knowledge, the in situ aircraft observation of deep convection in tropical cyclones accompanied by and in the absence of lightning depending on the stage of development has not been reported before. In this study, we present airborne in situ observations of trace gases within a tropical wave on 29 August 2018 and of the tropical storm Florence on 2 September 2018 based on measurements during the aircraft campaign CAFE Africa (Chemistry of the Atmosphere: Field Experiment in Africa).…”
Section: Introductionmentioning
confidence: 99%
“…This combination of meteorological schemes has already shown its capability to simulate heavy precipitation events in both real and idealized frameworks (Ducrocq et al, 2008;Bresson et al, 2012;Lee et al, 2018Lee et al, , 2019; among others). The SEVIRI-MSG BTs are compared to synthetic BTs computed offline using the Radiative Transfer for TIROS Operational Vertical Sounder (RTTOV) code version 11.3 (Saunders et al, 2013) from the simulation outputs (Chaboureau et al, 2008).…”
Section: High-resolution Cloud-chemistry Simulationsmentioning
confidence: 99%
“…The inversion of the lidar data delivers profiles of BR and hence of the particle backscatter coefficient β a and volume depolarization δ. From the latter, a value of the particle depolarization δ a can be obtained following Cairo et al (1999). The uncertainty associated with δ a very much depends on the associated BR and in our data can be as large as 100 % for a single measurement on very thin clouds.…”
Section: Data Processingmentioning
confidence: 81%