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The Role of Convect...
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Bardakov, Roman,1992-Stockholms universitet,Meteorologiska institutionen (MISU),Institutionen för miljövetenskap,Bolincentret för klimatforskning (tills m KTH & SMHI)
(author)
The Role of Convective Up- and Downdrafts in the Transport of Trace Gases in the Amazon
- Article/chapterEnglish2022
Publisher, publication year, extent ...
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2022-09-22
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American Geophysical Union (AGU),2022
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electronicrdacarrier
Numbers
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LIBRIS-ID:oai:DiVA.org:su-212830
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https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-212830URI
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https://doi.org/10.1029/2022jd037265DOI
Supplementary language notes
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Language:English
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Summary in:English
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Classification
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
Notes
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Deep convective clouds can redistribute gaseous species and particulate matter among different layers of the troposphere with important implications for atmospheric chemistry and climate. The large number of atmospheric trace gases of different volatility makes it challenging to predict their partitioning between hydrometeors and gas phase inside highly dynamic deep convective clouds. In this study, we use an ensemble of 51,200 trajectories simulated with a cloud-resolving model to characterize up- and downdrafts within Amazonian deep convective clouds. We also estimate the transport of a set of hypothetical non-reactive gases of different volatility, within the up- and downdrafts. We find that convective air parcels originating from the boundary layer (i.e., originating at 0.5 km altitude), can transport up to 25% of an intermediate volatility gas species (e.g., methyl hydrogen peroxide) and up to 60% of high volatility gas species (e.g., n-butane) to the cloud outflow above 10 km through the mean convective updraft. At the same time, the same type of gases can be transported to the boundary layer from the middle troposphere (i.e., originating at 5 km) within the mean convective downdraft with an efficiency close to 100%. Low volatility gases (e.g., nitric acid) are not efficiently transported, neither by the updrafts nor downdrafts, if the gas is assumed to be fully retained in a droplet upon freezing. The derived properties of the mean up- and downdraft can be used in future studies for investigating convective transport of a larger set of reactive trace gases.
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Krejci, RadovanStockholms universitet,Institutionen för miljövetenskap,Bolincentret för klimatforskning (tills m KTH & SMHI)(Swepub:su)krejc
(author)
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Riipinen, IlonaStockholms universitet,Institutionen för miljövetenskap,Bolincentret för klimatforskning (tills m KTH & SMHI)(Swepub:su)iriip
(author)
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Ekman, Annica M. L.Stockholms universitet,Meteorologiska institutionen (MISU),Bolincentret för klimatforskning (tills m KTH & SMHI)(Swepub:su)aekma
(author)
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Stockholms universitetMeteorologiska institutionen (MISU)
(creator_code:org_t)
Related titles
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In:Journal of Geophysical Research - Atmospheres: American Geophysical Union (AGU)127:182169-897X2169-8996
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