RRTMGP: A High-Performance Broadband Radiation Code for the Next Decade
Atmospheric and Environmental Research Lexington United States
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We are developing a high-performance broadband radiation code for the current generation of computational architectures. This code, called RRTMGP, will be a completely restructured and modern version of the accurate RRTMG radiation code Mlawer et al., 1997 Iacono et al., 2008 that has been implemented in many General Circulation Models GCMs including the Navy Global Environmental Model NAVGEM, the NCAR Community Earth System Model CESM, and NOAAs Global Forecast System GFS. Our proposed development will significantly lessen a key bottleneck in these highly complex and coupled models, namely the large fraction of computational time currently required for the calculation of radiative fluxes and heating rates.