Publication Abstracts

Klose et al. 2021

Klose, M., O. Jorba, M. Gonçalves Ageitos, J. Escribano, M.L. Dawson, V. Obiso, E. Di Tomaso, S. Basart, G. Montané Pinto, F. Macchia, P. Ginoux, J. Guerschman, C. Prigent, Y. Huang, J.F. Kok, R.L. Miller, and C. Pérez García-Pando, 2021: Mineral dust cycle in the Multiscale Online Nonhydrostatic AtmospheRe CHemistry model (MONARCH) Version 2.0. Geosci. Model Dev., 14, no. 10, 6403-6444, doi:10.5194/gmd-14-6403-2021.

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. Considering ellipsoidal particle shapes and dust refractive indices that account for size-resolved mineralogy, we estimate the global total (longwave and shortwave) dust direct radiative effect (DRE) at the surface to range between about -0.90 and -0.63 W/m2 and at the top of the atmosphere between -0.20 and -0.28 W/m2. Our evaluation demonstrates that MONARCH is able to reproduce key features of the spatiotemporal variability of the global dust cycle with important and insightful differences between the different configurations.

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BibTeX Citation

  author={Klose, M. and Jorba, O. and Gonçalves Ageitos, M. and Escribano, J. and Dawson, M. L. and Obiso, V. and Di Tomaso, E. and Basart, S. and Montané Pinto, G. and Macchia, F. and Ginoux, P. and Guerschman, J. and Prigent, C. and Huang, Y. and Kok, J. F. and Miller, R. L. and Pérez García-Pando, C.},
  title={Mineral dust cycle in the Multiscale Online Nonhydrostatic AtmospheRe CHemistry model (MONARCH) Version 2.0},
  journal={Geosci. Model Dev.},

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RIS Citation

ID  - kl05000f
AU  - Klose, M.
AU  - Jorba, O.
AU  - Gonçalves Ageitos, M.
AU  - Escribano, J.
AU  - Dawson, M. L.
AU  - Obiso, V.
AU  - Di Tomaso, E.
AU  - Basart, S.
AU  - Montané Pinto, G.
AU  - Macchia, F.
AU  - Ginoux, P.
AU  - Guerschman, J.
AU  - Prigent, C.
AU  - Huang, Y.
AU  - Kok, J. F.
AU  - Miller, R. L.
AU  - Pérez García-Pando, C.
PY  - 2021
TI  - Mineral dust cycle in the Multiscale Online Nonhydrostatic AtmospheRe CHemistry model (MONARCH) Version 2.0
JA  - Geosci. Model Dev.
VL  - 14
IS  - 10
SP  - 6403
EP  - 6444
DO  - 10.5194/gmd-14-6403-2021
ER  -

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