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DOI | 10.1007/s00382-016-3285-2 |
Effective control parameters in a deep convection scheme for improved simulation of the Madden-Julian oscillation | |
Choi, Jin-Ho; Seo, Kyong-Hwan | |
2017-06-01 | |
发表期刊 | CLIMATE DYNAMICS
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ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2017 |
卷号 | 48期号:11 |
文章类型 | Article |
语种 | 英语 |
国家 | South Korea |
英文摘要 | This work seeks to find the most effective parameters in a deep convection scheme (relaxed Arakawa-Schubert scheme) of the National Centers of Environmental Prediction Climate Forecast System model for improved simulation of the Madden-Julian Oscillation (MJO). A suite of sensitivity experiments are performed by changing physical components such as the relaxation parameter of mass flux for adjustment of the environment, the evaporation rate from large-scale precipitation, the moisture trigger threshold using relative humidity of the boundary layer, and the fraction of re-evaporation of convective (subgrid-scale) rainfall. Among them, the last two parameters are found to produce a significant improvement. Increasing the strength of these two parameters reduces light rainfall that inhibits complete formation of the tropical convective system or supplies more moisture that help increase a potential energy to large-scale environment in the lower troposphere (especially at 700 hPa), leading to moisture preconditioning favorable for further development and eastward propagation of the MJO. In a more humid environment, more organized MJO structure (i.e., space-time spectral signal, eastward propagation, and tilted vertical structure) is produced. |
英文关键词 | Madden-Julian oscillation NCEP CFS model RAS deep convection scheme Critical relative humidity of the boundary layer Fraction of re-evaporation of convective precipitation |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000402122200008 |
WOS关键词 | CLIMATE FORECAST SYSTEM ; COUPLED EQUATORIAL WAVES ; STRATIFORM INSTABILITY ; ARAKAWA-SCHUBERT ; MJO ; MODELS ; PRECIPITATION ; TEMPERATURE ; TROPICS ; DATASET |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/36351 |
专题 | 气候变化 |
作者单位 | Pusan Natl Univ, Div Earth Environm Syst, Dept Atmospher Sci, Busan 609735, South Korea |
推荐引用方式 GB/T 7714 | Choi, Jin-Ho,Seo, Kyong-Hwan. Effective control parameters in a deep convection scheme for improved simulation of the Madden-Julian oscillation[J]. CLIMATE DYNAMICS,2017,48(11). |
APA | Choi, Jin-Ho,&Seo, Kyong-Hwan.(2017).Effective control parameters in a deep convection scheme for improved simulation of the Madden-Julian oscillation.CLIMATE DYNAMICS,48(11). |
MLA | Choi, Jin-Ho,et al."Effective control parameters in a deep convection scheme for improved simulation of the Madden-Julian oscillation".CLIMATE DYNAMICS 48.11(2017). |
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