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Age spectra and other transport diagnostics in the North American monsoon UTLS from SEAC4RS in situ trace gas measurements

Ray, Eric A. ; Atlas, Elliot L.; Schauffler, Sue; Chelpon, Sofia; Pan, Laura; Bönisch, Harald 1; Rosenlof, Karen H.
1 Institut für Meteorologie und Klimaforschung Atmosphärische Spurengase und Fernerkundung (IMKASF), Karlsruher Institut für Technologie (KIT)

Abstract:

The upper troposphere and lower stratosphere (UTLS) region during the summer monsoon season over North America (NAM) is influenced by the transport of air from a variety of source regions over a wide range of timescales (hours to years). Age spectra are useful for characterizing the transport into such a region, and in this study we use and build on recently developed techniques to infer age spectra from trace gas measurements with photochemical lifetimes from days to centuries. We show that the measurements taken by the whole-air sampler instrument during the SEAC4RS campaign can be used to derive not only age spectra, but also path-integrated lifetimes of each of the trace gases and partitioning between North American and tropical surface source origins. The method used here can also clearly identify and adjust for measurement outliers that were influenced by polluted surface source regions. The results are generally consistent with expected transport features of the NAM but also provide a range of transport diagnostics (age spectra, trace gas lifetimes and surface source regions) that have not previously been computed solely from in situ measurements. ... mehr

Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung Atmosphärische Spurengase und Fernerkundung (IMKASF)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2022
Sprache Englisch
Identifikator ISSN: 1680-7324
KITopen-ID: 1000148946
HGF-Programm 12.11.13 (POF IV, LK 01) Long-term trends of global atmospheric composition
Erschienen in Atmospheric Chemistry and Physics
Verlag European Geosciences Union (EGU)
Band 22
Heft 10
Seiten 6539–6558
Vorab online veröffentlicht am 20.05.2022
Nachgewiesen in Scopus
Dimensions
OpenAlex
Web of Science
Globale Ziele für nachhaltige Entwicklung Ziel 13 – Maßnahmen zum Klimaschutz

Verlagsausgabe §
DOI: 10.5445/IR/1000148946
Veröffentlicht am 25.07.2022
Originalveröffentlichung
DOI: 10.5194/acp-22-6539-2022
Scopus
Zitationen: 7
Web of Science
Zitationen: 7
Dimensions
Zitationen: 11
Seitenaufrufe: 101
seit 02.08.2022
Downloads: 32
seit 02.08.2022
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