BEGIN:VCALENDAR VERSION:2.0 PRODID:Linklings LLC BEGIN:VTIMEZONE TZID:Europe/Stockholm X-LIC-LOCATION:Europe/Stockholm BEGIN:DAYLIGHT TZOFFSETFROM:+0100 TZOFFSETTO:+0200 TZNAME:CEST DTSTART:19700308T020000 RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=-1SU END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:+0200 TZOFFSETTO:+0100 TZNAME:CET DTSTART:19701101T020000 RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU END:STANDARD END:VTIMEZONE BEGIN:VEVENT DTSTAMP:20190719T085744Z LOCATION:HG D 1.1 DTSTART;TZID=Europe/Stockholm:20190613T144500 DTEND;TZID=Europe/Stockholm:20190613T151500 UID:submissions.pasc-conference.org_PASC19_sess115_msa107@linklings.com SUMMARY:The Challenge by the NICAM-LETKF Grand Ensemble Simulations in Glo bal Storm Resolving Scale DESCRIPTION:Minisymposium\nClimate and Weather\n\nThe Challenge by the NIC AM-LETKF Grand Ensemble Simulations in Global Storm Resolving Scale\n\nSat oh, Yashiro\n\nThe Nonhydrostatic Icosahedral Atmospheric Model NICAM is p lanned for grand ensemble simulations with number of members of 1024 with horizontal mesh size of 3.5 km, as a global storm-resolving scale mode for the new-coming post-K computer which will begin full operations around 20 21 at RIKEN, Kobe, Japan. The NICAM-LETKF assimilation system is now being tested with this ensemble size and the resolution. Toward this target, we have developed a new data exchange method that solves issues related to m assive I/O and inter-node communications (Yashiro et al., 2016, doi:10.519 4/gmd-9-2293-2016). We will use single precision floating-point for both t he physical processes and the dynamical processes except for some critical calculations, as investigated by Nakano et al. (2018, doi:10.1175/MWR-D-1 7-0257.1). The NICAM-LETKF research analysis system called NEXRA is now op erationally run by JAXA and the dataset is used for researches (Kotsuki et al., 2019, doi:10.2151/sola.15A-001). In this talk, we will review the NI CAM research activities toward the post-K together as summarized by Satoh et al. (2017, doi:10.1186/s40645-017-0127-8) with some results for Project DYAMOND (DYnamics of the Atmospheric general circulation Modeled On Non-h ydrostatic Domains; https://www.esiwace.eu/services/dyamond), which escrib es a framework for the intercomparison of global storm-resolving models (S tevens et al. 2019, submitted to Progress in Earth and Planetary Scien ce). END:VEVENT END:VCALENDAR