caa a22 4500 469052902 CHVBK 20180323132835.0 cr unu---uuuuu 170328e19920301xx s 000 0 eng 10.1007/BF01025402 doi (NATIONALLICENCE)springer-10.1007/BF01025402 The role of the convective "trigger function” in numerical forecasts of mesoscale convective systems [Elektronische Daten] [J. Kain, J. Fritsch] Summary: Three-dimensional numerical model simulations of a mesoscale convective system are performed to evaluate the sensitivity of the simulations to differences in the convective trigger function. The Penn State/NCAR mesoscale model with the Kain-Fritsch convective parameterization scheme is used as the modeling system for the study. All simulations are performed on the June 10-11, 1985 squall line from the OK PRE-STORM field experiment. Individual simulations differ only in their specification of the trigger function within the Kain-Fritsch scheme. Comparison of results from 12 hour simulations indicates that the position, timing, and intensity of convective activity and mesoscale features vary substantially as a function of the trigger function formulation. The results suggest that the convective trigger function is an integral part of the overall convective parameterization problem, and that great care must be exercised is designing realistic trigger function formulations, especially as model resolutions approach the scale of individual convective clouds. Springer-Verlag, 1992 Kain J. Department of Meteorology, The Pennsylvania State University, 503 Walker Building, 16802, University Park, PA, USA aut Fritsch J. Department of Meteorology, The Pennsylvania State University, 503 Walker Building, 16802, University Park, PA, USA aut Meteorology and Atmospheric Physics Springer-Verlag 49/1-4(1992-03-01), 93-106 0177-7971 49:1-4<93 1992 49 703 https://doi.org/10.1007/BF01025402 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01025402 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kain J. Department of Meteorology, The Pennsylvania State University, 503 Walker Building, 16802, University Park, PA, USA aut NATIONALLICENCE 700 1- Fritsch J. Department of Meteorology, The Pennsylvania State University, 503 Walker Building, 16802, University Park, PA, USA aut NATIONALLICENCE 773 0- Meteorology and Atmospheric Physics Springer-Verlag 49/1-4(1992-03-01), 93-106 0177-7971 49:1-4<93 1992 49 703 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer