Articles | Volume 19, issue 11
https://doi.org/10.5194/gmd-19-5207-2026
https://doi.org/10.5194/gmd-19-5207-2026
Development and technical paper
 | 
16 Jun 2026
Development and technical paper |  | 16 Jun 2026

Evaluating modifications to Tiedtke cumulus parameterization for improving summer precipitation forecasts in the nested grid of Taiwan Global Forecast System (TGFS v1.1)

Chang-Hung Lin, Guo-Yuan Lien, and Ling-Feng Hsiao

Cited articles

Arakawa, A. and Schubert, W. H.: Interaction of a Cumulus Cloud Ensemble with the Large-Scale Environment, Part I, J. Atmos. Sci., 31, 674–701, https://doi.org/10.1175/1520-0469(1974)031<0674:IOACCE>2.0.CO;2, 1974. 
Arakawa, A. and Wu, C.-M.: A Unified representation of deep moist convection in numerical modeling of the Atmosphere. Part I, J. Atmos. Sci., 70, 1977–1992, https://doi.org/10.1175/JAS-D-12-0330.1, 2013. 
Bechtold, P., Kohler, M., Jung, T., Doblas-Reyes, F., Leutbecher, M., Rodwell, M., Vitart, F., and Balsamo, G.: Advances in simulating atmospheric variability with the ECMWF model: From synoptic to decadal time-scales, Q. J. Roy. Meteor. Soc., 134, 1337–1351, https://doi.org/10.1002/qj.289, 2008. 
Bechtold, P., Semane, N., Lopez, P., Chaboureau, J.-P., Beljaars, A., and Bormann, N.: Representing equilibrium and nonequilibrium convection in large-scale models, J. Atmos. Sci., 71, 734–753, https://doi.org/10.1175/JAS-D-13-0163.1, 2014. 
Chang, P.-L., Zhang, J., Tang, Y.-S., Tang, L., Lin, P.-F., Langston, C., Kaney, B., Chen, C.-R., and Howard, K.: An Operational Multi-Radar Multi-Sensor QPE System in Taiwan, B. Am. Meteorol. Soc., 102, E555–E577, https://doi.org/10.1175/BAMS-D-20-0043.1, 2021. 
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Short summary
This study presents a series of modifications to the Tiedtke convection scheme, aiming to improve summer rainfall predictions in the 4.8-km-resolution nested grid of the Taiwan Global Forecast System (TGFS). The modifications improve the spatial distribution of rainfall and reduce the heavy rainfall bias in five-day forecast, as demonstrated by case studies and evaluations over a two-month period.
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