Incorporating gas-phase chemistry into the Unified Forecast System (UFS) for global air quality applications

作者：Jian He, Li Zhang, Rebecca H. Schwantes, Barry Baker, Larry W. Horowitz, Vaishali Naïk, Congmeng Lyu, Zachary Moon, Georg Grell, Ravan Ahmadov, Jordan Schnell, Kai Yang, Zigang Wei, Siyuan Wang, Kai‐Lan Chang, Alan M. Gorchov Negron, Aihua Zhu, Shobha Kondragunta, Eric C. Apel, Ilann Bourgeois, R. Commane, Samuel R. Hall, Alan J. Hills, Rebecca S. Hornbrook, Jeff Peischl, Kirk Ullmann, Gonzalo González Abad, Zolal Ayazpour, Caroline R. Nowlan, Brian McDonald · 年份：2025 · DOI：10.22541/essoar.175130532.28945101/v1 · 被引用次数：1 · 研究领域：Air Quality Monitoring and Forecasting、Atmospheric chemistry and aerosols

The Unified Forecast System (UFS) is a community-based Earth modeling system designed to support operational forecasts at the National Oceanic and Atmospheric Administration (NOAA), while also facilitating the integration of research advances from the broader scientific community. The Configurable ATmospheric Chemistry (CATChem) library is being developed to include comprehensive chemical and aerosol processes for representing atmospheric chemistry and composition through a flexible, easy-to-modify, and well-documented infrastructure. Here CATChem version 1.0 (v1.0) is linked to the UFS High Resolution 3 configuration to create the Unified Forecast System with Chemistry (UFS-Chem) v1.0. The configurability of UFS-Chem enables its use for both research and operational applications, reducing time and effort for transitions to operations and enhancing collaboration with the research community. As a first step towards this goal, the gas-phase chemistry from the Atmosphere Model version 4.1 (AM4.1), developed at NOAA Geophysical Fluid Dynamics Laboratory (GFDL), is incorporated into the CATChem library and linked to the UFS as the first UFS-Chem configuration for global air quality applications. The simulated atmospheric compositions are generally consistent with those in GFDL-AM4.1 and agree well with surface observations, aircraft measurements, and satellite retrievals, demonstrating atmospheric chemistry is reasonably well represented in the model. This work documents model unc...