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Mineral dust cycle in the Multiscale Online Nonhydrostatic Atmosphere Chemistry model (MONARCH) version 2.0

Klose, M.; Jorba, O.; Gonçalves Ageitos, M.; Escribano, J.; Dawson, M. L.; Obiso, V.; Di Tomaso, E.; Basart, S.; Montané Pinto, G.; MacChia, F.; Ginoux, P.; Guerschman, J.; Prigent, C.; Huang, Y.; Kok, J. F.; Miller, R. L.; Pérez García-Pando, C.

We present the dust module in the Multiscale Online Non-hydrostatic AtmospheRe CHemistry model (MONARCH) version 2.0, a chemical weather prediction system that can be used for regional and global modeling at a range of resolutions. The representations of dust processes in MONARCH were upgraded with a focus on dust emission (emission parameterizations, entrainment thresholds, considerations of soil moisture and surface cover), lower boundary conditions (roughness, potential dust sources), and dust–radiation interactions. MONARCH now allows modeling of global and regional mineral dust cycles using fundamentally different paradigms, ranging from strongly simplified to physics-based parameterizations. We present a detailed description of these updates along with four global benchmark simulations, which use conceptually different dust emission parameterizations, and we evaluate the simulations against observations of dust optical depth. We determine key dust parameters, such as global annual emission/deposition flux, dust loading, dust optical depth, mass-extinction efficiency, single-scattering albedo, and direct radiative effects. For dust-particle diameters up to 20 µm, the total annual dust emission and deposition fluxes obtained with our four experiments range between about 3500 and 6000 Tg, which largely depend upon differences in the emitted size distribution. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000139737
Veröffentlicht am 12.11.2021
DOI: 10.5194/gmd-14-6403-2021
Zitationen: 2
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung - Forschungsbereich Troposphäre (IMK-TRO)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 1991-959X, 1991-9603
KITopen-ID: 1000139737
Erschienen in Geoscientific Model Development
Verlag Copernicus Publications
Band 14
Heft 10
Seiten 6403-6444
Nachgewiesen in Web of Science
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