edu.ucar.opensky::articles:25230 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-24T22:49:22.322226 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d7m61pvn https://doi.org/10.5065/NMP7-EP60 https Related Dataset #1 CESM2.1/CAM-chem Instantaneous Output for Boundary Conditions https://doi.org/10.5065/Z83F-N512 https Related Dataset #2 NCEP ADP Global Upper Air and Surface Weather Observations (PREPBUFR format) https://doi.org/10.5281/zenodo.4594671 https Related Software #1 WRFDA3.9.1_WRF-Chem Implementation of aerosol data assimilation in WRFDA (v4.0.3) for WRF-Chem (v3.9.1) using the RACM/MADE-VBS scheme 2022-03-02T00:00:00Z publication https://n2t.org/ark:/85065/d7m61pvn https://doi.org/10.5194/gmd-15-1769-2022 Ha, So-Young author UCAR/NCAR - Library publisher The Weather Research and Forecasting model data assimilation (WRFDA) system, initially designed for meteorological data assimilation, is extended for aerosol data assimilation for the WRF model coupled with chemistry (WRF-Chem). An interface between WRF-Chem and WRFDA is built for the Regional Atmospheric Chemistry Mechanism (RACM) chemistry and the Modal Aerosol Dynamics Model for Europe (MADE) coupled with the Volatility Basis Set (VBS) aerosol schemes. This article describes the implementation of the new interface for assimilating PM2.5 and PM10 as well as four gas species (SO2, NO2, O-3, and CO) on the ground. The effects of aerosol data assimilation are briefly examined through a month-long case study during the Korea-United States Air Quality (KORUS-AQ) period. It is demonstrated that the improved chemical initial conditions through the 3D-Var analysis can lead to consistent forecast improvements up to 26 %, reducing systematic bias errors in surface PM2.5 (PM10) concentrations to 0.0 (-1.9) mu g m(-3) over South Korea for 24h. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication Copyright author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. None eng geoscientificInformation