Publication Abstracts

Lee et al. 2013

Lee, H., J.-J. Baik, and J.-Y. Han, 2013: Sensitivity of numerical solutions to time step in a nonlinear atmospheric model. J. Korean Earth Sci. Soc., 34, no. 1, 51-58, doi:10.5467/JKESS.2013.34.1.51. (In Korean)

An appropriate determination of time step is one of the important problems in atmospheric modeling. In this study, we investigate the sensitivity of numerical solutions to time step in a nonlinear atmospheric model. For this purpose, a simple nondimensional dynamical model is employed, and numerical experiments are performed with various time steps and nonlinearity factors. Results show that numerical solutions are not sensitive to time step when the nonlinearity factor is not influentially large and truncation error is negligible. On the other hand, when the nonlinearity factor is large (i.e., in a highly nonlinear regime), numerical solutions are found to be sensitive to time step. In this situation, smaller time step increases the intensity of the spatial filter, which makes small-scale phenomena weaken. This conflicts with the fact that smaller time step generally results in more accurate numerical solutions owing to reduced truncation error. This conflict is inevitable because the spatial filter is necessary to stabilize the numerical solutions of the nonlinear model.

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BibTeX Citation

@article{le03800f,
  author={Lee, H. and Baik, J.-J. and Han, J.-Y.},
  title={Sensitivity of numerical solutions to time step in a nonlinear atmospheric model},
  year={2013},
  journal={J. Korean Earth Sci. Soc.},
  volume={34},
  number={1},
  pages={51--58},
  doi={10.5467/JKESS.2013.34.1.51},
}

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RIS Citation

TY  - JOUR
ID  - le03800f
AU  - Lee, H.
AU  - Baik, J.-J.
AU  - Han, J.-Y.
PY  - 2013
TI  - Sensitivity of numerical solutions to time step in a nonlinear atmospheric model
JA  - J. Korean Earth Sci. Soc.
VL  - 34
IS  - 1
SP  - 51
EP  - 58
DO  - 10.5467/JKESS.2013.34.1.51
ER  -

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