edu.ucar.opensky::articles:23771 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-25T06:43:06.966818 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d7cn776b Impact of assimilating meteorological observations on source emissions estimate and chemical simulations 2020-10-28T00:00:00Z publication https://n2t.org/ark:/85065/d7cn776b https://doi.org/10.1029/2020GL089030 Peng, Z. author Lei, L. author Liu, Zhiquan author Liu, H. author Chu, K. author Kou, X. author UCAR/NCAR - Library publisher The impacts of assimilating meteorological observations on source emissions estimate and chemical simulations are investigated. Using 6-hr Global Forecast System (GFS) analyses or cycling ensemble assimilation of meteorological observations have similar diurnal variations of source emissions. Compared to experiment without meteorological analyses, using 6-hr GFS analyses provides stronger diurnal variations of SO2 and NO emissions, and cycling ensemble assimilation of meteorological observations further strengthens the diurnal variations. When independently verified against the observed PM2.5, SO2, and NO2 concentrations, simulation forced by posterior source emissions with 6-hr GFS analyses produces smaller biases and errors than simulation forced by posterior source emissions without meteorological analyses. The biases and errors are generally further reduced with cycling ensemble assimilation of meteorological fields. Therefore, the advantages of cycling ensemble assimilation of meteorological observations to provide realistic meteorological fields and construct flow-dependent uncertainties of meteorological fields for estimating source emissions and chemical simulations have been demonstrated. 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