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Tropospheric transport and unresolved convection: numerical experiments with CLaMS 2.0/MESSy

Konopka, Paul ; Tao, Mengchu; von Hobe, Marc; Hoffmann, Lars; Kloss, Corinna; Ravegnani, Fabrizio; Volk, C. Michael; Lauther, Valentin; Zahn, Andreas 1; Hoor, Peter; Ploeger, Felix
1 Institut für Meteorologie und Klimaforschung – Atmosphärische Spurenstoffe und Fernerkundung (IMK-ASF), Karlsruher Institut für Technologie (KIT)

Abstract:

Pure Lagrangian, i.e., trajectory-based transport models, take into account only the resolved advective part of transport. That means neither mixing processes between the air parcels (APs) nor unresolved subgrid-scale advective processes like convection are included. The Chemical Lagrangian Model of the Stratosphere (CLaMS 1.0) extends this approach by including mixing between the Lagrangian APs parameterizing the small-scale isentropic mixing. To improve model representation of the upper troposphere and lower stratosphere (UTLS), this approach was extended by taking into account parameterization of tropospheric mixing and unresolved convection in the recently published CLaMS 2.0 version. All three transport modes, i.e., isentropic and tropospheric mixing and the unresolved convection can be adjusted and optimized within the model. Here, we investigate the sensitivity of the model representation of tracers in the UTLS with respect to these three modes.

For this reason, the CLaMS 2.0 version implemented within the Modular Earth Submodel System (MESSy), CLaMS 2.0/MESSy, is applied with meteorology based on the ERA-Interim (EI) and ERA5 (E5) reanalyses with the same horizontal resolution (1.0×1.0$^∘$) but with 60 and 137 model levels for EI and E5, respectively. ... mehr


Verlagsausgabe §
DOI: 10.5445/IR/1000151632
Veröffentlicht am 19.10.2022
Originalveröffentlichung
DOI: 10.5194/gmd-15-7471-2022
Scopus
Zitationen: 3
Web of Science
Zitationen: 2
Dimensions
Zitationen: 3
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung – Atmosphärische Spurenstoffe und Fernerkundung (IMK-ASF)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2022
Sprache Englisch
Identifikator ISSN: 1991-9603
KITopen-ID: 1000151632
HGF-Programm 12.11.13 (POF IV, LK 01) Long-term trends of global atmospheric composition
Erschienen in Geoscientific Model Development
Verlag Copernicus Publications
Band 15
Heft 19
Seiten 7471–7487
Vorab online veröffentlicht am 10.10.2022
Schlagwörter chemical lagrangian model, era-interim, age, air, reanalysis, chemistry, updrafts, utls
Nachgewiesen in Web of Science
Dimensions
Scopus
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