Graphical Abstract

Kim, E.-H., E. Lee, S.-W. Lee, and Y. H. Lee, 2019: Characteristics and effects of ground-based GNSS zenith total delay observation errors in the convective-scale model. J. Meteor. Soc. Japan, 97, 1009-1021. Abstract with highlights

Plain Language Summary: The ground-based global navigation satellite system (GNSS) data, which provides atmospheric water vapor information in the lower troposphere to the model, affect the accuracy of humidity and precipitation forecast. This study investigates the impacts of the GNSS data observation errors in the KMA’s convective-scale model. The observation error of the each ground-based GNSS station was calculated using several a posteriori methods and the statistical characteristics were analyzed. The experiment using observation errors applied considering the spatial and temporal characteristics showed the best precipitation accuracy among other experiments.