Characteristics of the Kinetic Energy Spectrum of NICAM Model Atmosphere
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- Terasaki Koji
- Center for Computational Sciences, University of Tsukuba
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- Tanaka H. L.
- Center for Computational Sciences, University of Tsukuba
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- Satoh Masaki
- Center for Climate System Research, The University of Tokyo
書誌事項
- 公開日
- 2009
- 資源種別
- journal article
- DOI
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- 10.2151/sola.2009-046
- 公開者
- 公益社団法人 日本気象学会
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説明
In this study, characteristics of the energy spectrum in the zonal wavenumber domain are examined for the cloud resolving global model NICAM. A series of numerical experiments are conducted for NICAM with various horizontal resolutions from 224 km (glevel-5) to 7.0 km (glevel-10) using the T2K-Tsukuba System and 3.5 km (glevel-11) using the Earth Simulator (ES). The energy spectra of most of horizontal resolutions obey k-3 power law in synoptic and sub-synoptic scales (wavenumbers k = 5 to 30). However, the energy slope for glevel-5 becomes much steeper around zonal wavenumber k = 10. Nastrom et al. (1985) explained that the energy spectrum near the tropopause at wavelengths below 400 km appears to follow the k-5/3 power. This scale corresponds to about k = 70 near 45°N. It is found that the energy spectra for k > 30 for glevel-10 and 11 follow the k-5/3 power law. These results agree quite well with the observational studies. It is also found that the kinetic energy of the vertical wind is white noise spectrum.
収録刊行物
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- SOLA
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SOLA 5 180-183, 2009
公益社団法人 日本気象学会
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詳細情報 詳細情報について
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- CRID
- 1390282680197893248
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- NII論文ID
- 130004448500
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- NII書誌ID
- AA12022899
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- ISSN
- 13496476
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- HANDLE
- 2241/104814
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- 本文言語コード
- en
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- 資料種別
- journal article
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- データソース種別
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- JaLC
- IRDB
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
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