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DOI | 10.1002/joc.5736 |
Coupled model fidelity in capturing atmospheric internal processes during organization and intensification of boreal summer intra-seasonal oscillation | |
Sarkar, Sahadat1,2; Mukhopadhyay, Parthasarathi1; Krishna, Ravuri Phani Murali1; Dutta, Somenath3 | |
2018-11-30 | |
发表期刊 | INTERNATIONAL JOURNAL OF CLIMATOLOGY |
ISSN | 0899-8418 |
EISSN | 1097-0088 |
出版年 | 2018 |
卷号 | 38期号:14页码:5339-5353 |
文章类型 | Article |
语种 | 英语 |
国家 | India |
英文摘要 | The study investigates the Climate Forecast System version 2 (CFSv2) model fidelity in capturing large-scale dynamical field and the energy conversion processes during organization and intensification of Boreal Summer Intra-Seasonal Oscillation (BSISO). Experiment is carried out to make 10-year free run to evaluate the model. Based on rainfall analyses, two types of events are defined one strong and other with weaker intensity. The result reveals that model over estimates the BSISO intensity starting from the initial phase. Strong events based on MERRA data show a persistent increasing lower-level moisture convergence with respect to convection centre (CC) and a collocated vertical velocity with CC. However, model moisture convergence and vertical velocity are slightly stronger than observation at the initial phase but it is not persisting in the subsequent lags. The analysis of eddy kinetic energy (EKE) budget equation shows that the model intra-seasonal EKE is very weak at 850 hPa level. The vertical structure of EKE has shown that a positive EKE at the lower to middle troposphere increases in the subsequent lags but it is very weak for model. The analysis of each term of EKE budget has shown that the barotropic energy conversion (Delta CK) and convergence of eddy geopotential fluxes (Delta FG) are the dominant contributors for positive EKE tendency in the ERA analysis and both the terms increase as the BSISO approaches towards its organized and intense phase. However for model, the above terms are very weak. The EKE advection through large-scale background flow (Delta AM) and synoptic-scale eddy (Delta AE) adds negatively to the EKE tendency for strong events. However for model, the magnitudes of the above terms are higher than that of the observation for both strong and weak events. Thus, the model has deficiency in capturing the dynamical processes and the energy conversion processes properly. |
英文关键词 | atmospheric energetics BSISO CFSv2 T126 EKE budget |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000452430000020 |
WOS关键词 | INTRASEASONAL VARIABILITY ; ASIAN MONSOON ; PREDICTION ; PREDICTABILITY ; SIMULATIONS ; SYSTEM ; TRMM ; ENERGETICS ; ENSEMBLE ; DYNAMICS |
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/37102 |
专题 | 气候变化 |
作者单位 | 1.Indian Inst Trop Meteorol, Dr Homi Bhabha Rd, Pune 411008, Maharashtra, India; 2.Savitribai Phule Pune Univ, Dept Atmospher & Space Sci, Pune, Maharashtra, India; 3.Indian Meteorol Dept, Pune, Maharashtra, India |
推荐引用方式 GB/T 7714 | Sarkar, Sahadat,Mukhopadhyay, Parthasarathi,Krishna, Ravuri Phani Murali,et al. Coupled model fidelity in capturing atmospheric internal processes during organization and intensification of boreal summer intra-seasonal oscillation[J]. INTERNATIONAL JOURNAL OF CLIMATOLOGY,2018,38(14):5339-5353. |
APA | Sarkar, Sahadat,Mukhopadhyay, Parthasarathi,Krishna, Ravuri Phani Murali,&Dutta, Somenath.(2018).Coupled model fidelity in capturing atmospheric internal processes during organization and intensification of boreal summer intra-seasonal oscillation.INTERNATIONAL JOURNAL OF CLIMATOLOGY,38(14),5339-5353. |
MLA | Sarkar, Sahadat,et al."Coupled model fidelity in capturing atmospheric internal processes during organization and intensification of boreal summer intra-seasonal oscillation".INTERNATIONAL JOURNAL OF CLIMATOLOGY 38.14(2018):5339-5353. |
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