Articles | Volume 14, issue 1
Geosci. Model Dev., 14, 205–221, 2021
https://doi.org/10.5194/gmd-14-205-2021
Geosci. Model Dev., 14, 205–221, 2021
https://doi.org/10.5194/gmd-14-205-2021

Development and technical paper 12 Jan 2021

Development and technical paper | 12 Jan 2021

Spin-up characteristics with three types of initial fields and the restart effects on forecast accuracy in the GRAPES global forecast system

Zhanshan Ma et al.

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The spin-up in GRAPES_GFS, under different initial fields, goes through a dramatic adjustment in the first half-hour of integration and slow dynamic and thermal adjustments afterwards. It lasts for at least 6 h, with model adjustment gradually completed from lower to upper layers in the model. Thus, the forecast results, at least in the first 6 h, should be avoided when used. In addition, the spin-up process should repeat when the model simulation is interrupted.