The global seasonal forecasting system version 6 (GloSea6) operated by the Korea MeteorologicalAdministration for 1- and 3-month prediction products does not include complex atmospheric chemistry-aerosol physicalprocesses (UKCA). In this study, low-re...
The global seasonal forecasting system version 6 (GloSea6) operated by the Korea MeteorologicalAdministration for 1- and 3-month prediction products does not include complex atmospheric chemistry-aerosol physicalprocesses (UKCA). In this study, low-resolution GloSea6 and GloSea6 coupled with UKCA (GloSea6-UKCA) wereinstalled in a CentOS-based Linux cluster system, and preliminary prediction results for the spring of 2000 wereexamined. Low-resolution versions of GloSea6 and GloSea6-UKCA are highly needed to examine the effects ofatmospheric chemistry-aerosol owing to the huge computational demand of the current high resolution GloSea6. Thespatial distributions of the surface temperature and daily precipitation for April 2000 (obtained from the two model runsfor the next 75 days, starting from March 1, 2000, 00Z) were compared with the ERA5 reanalysis data. The GloSea6-UKCA results were more similar to the ERA5 reanalysis data than the GloSea6 results. The surface air temperature anddaily precipitation prediction results of GloSea6-UKCA for spring, particularly over East Asia, were improved by theinclusion of UKCA. Furthermore, compared with GloSea6, GloSea6-UKCA simulated improved temporal variations in thetemperature and precipitation intensity during the model integration period that were more similar to the reanalysis data.
This indicates that the coupling of atmospheric chemistry-aerosol processes in GloSea6 is crucial for improving the springpredictions over East Asia.