Publikationsdatum:
2023-08-09
Beschreibung:
The Asian Summer Monsoon (ASM) is important for weather, climate, air quality and atmospheric composition with its location over a large densely-populated area that extends throughout South to Southeast and East Asia. Deep convection associated with the ASM lofts pollutants from urban and biomass burning source regions to the upper troposphere, where an enhancement of these pollutants accumulate in the associated upper tropospheric anticyclone. With local-scale processes such as urban emissions and deep convection connected to continental-scale impacts in the upper troposphere, it is a challenge to accurately model explicitly the critical multiscale processes with traditional chemistry transport models. However, a new class of modeling infrastructure, which has variable sized grid meshes, allows for such representation. In this presentation, we describe the Multiscale Infrastructure for Chemistry and Aerosols (MUSICA) and its application to the ASM. MUSICA version 0 makes use of a cubic sphere grid mesh that allows for higher-resolution grid spacing over specified regions. Recently, MUSICAv0 provided chemical forecasts during the Asian Summer Monsoon Chemical and Climate Impact Project (ACCLIP) field campaign in July-August 2022. Version 1 of MUSICA uses the Model Prediction Across Scales (MPAS) grid mesh and dynamical core, which allows regional refinement to convective-permitting scales (i.e., explicitly representing convection with ~3 km grids). MUSICAv1 is currently being tested to evaluate its computational performance. This presentation will provide examples of the capabilities of MUSICAv0 and MUSICAv1 in representing convective transport using ACCLIP field observations, in contrast with coarse-grid global chemistry transport models.
Sprache:
Englisch
Materialart:
info:eu-repo/semantics/conferenceObject
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