HERMESv3, a stand-alone multiscale atmospheric emission modelling framework – Part 1: global and regional module

Abstract

Abstract. We present the High-Elective Resolution Modelling Emission System version 3 (HERMESv3), an open source, parallel and stand-alone multiscale atmospheric emission modelling framework that computes gaseous and aerosol emissions for use in atmospheric chemistry models. HERMESv3 is coded in Python and consists of a global_regional module and a bottom_up module that can be either combined or executed separately. In this contribution (Part 1) we describe the global_regional module, a highly customizable emission processing system that calculates emissions from different sources, regions and pollutants on a user-specified global or regional grid. The user can flexibly define combinations of existing up-to-date global and regional emission inventories and apply country specific scaling factors and masks. Each emission inventory is individually processed using user-defined vertical, temporal and speciation profiles that allow obtaining emission outputs compatible with multiple chemical mechanisms (e.g. Carbon-Bond 05). The selection and combination of emission inventories and databases is done through detailed configuration files providing the user with a widely applicable framework for designing, choosing and adjusting the emission modelling experiment without modifying the HERMESv3 source code. The generated emission fields have been successfully tested in different atmospheric chemistry models (i.e. CMAQ, WRF-Chem and NMMB-MONARCH) at multiple spatial and temporal resolutions. In a companion article (Part 2) we describe the bottom_up module, which estimates emissions at the source level (e.g. road link) combining state-of-the-art bottom-up methods with local activity and emission factors.

To what extent the traffic restriction policies applied in Barcelona city can improve its air quality?

“…The mesoscale air quality modelling system CALIOPE is composed of the Weather Research and Forecasting (WRF) model version 3.5.1 with WPS (WRF Preprocessing System) version 3.9.1 (Skamarock and Klemp, 2008), combined with the HERMESv3 multi-scale atmospheric emission modelling framework (Guevara et al, 2019(Guevara et al, , 2020 and the Community Multiscale Air Quality Modelling System version 5.0.2 (CMAQ) (Byun and Schere, 2005). To obtain the adequate boundary and initial conditions, the CALIOPE system is run over Europe at a 12 km by 12 km horizontal resolution, the Iberian Peninsula at 4 km by 4 km, and the Catalonian region including Barcelona at 1 km by 1 km resolution (Fig.…”

Potential of TROPOMI for understanding spatio-temporal variations in surface NO2 and their dependencies upon land use over the Iberian Peninsula

“…Anthropogenic NOx emissions are taken from the annual European CAMS-REG-AP_v5.1 emission inventory (Kuenen et al, 2022) and preprocessed with the HERMESv3_GR emission model (Guevara et al, 2019), using an updated version (v3.2) of the CAMS-REG-TEMPOv2.1 temporal profiles described in Guevara et al (2021). Compared to the CAMS-REG-TEMPOv2.1 that was relying on traffic counts data, the update proposed in CAMS-REG-TEMPOv3.2 notably includes an improvement of the road transport emission temporal profiles through the use of TomTom traffic congestion statistics from about 50 countries (https://www.tomtom.com/traffic-index/).…”