Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/joc.5108 |
Sensitivity of AGCM-simulated regional JJAS precipitation to different convective parameterization schemes | |
Ehsan, Muhammad Azhar1; 39;Brien2 | |
2017-11-15 | |
发表期刊 | INTERNATIONAL JOURNAL OF CLIMATOLOGY |
ISSN | 0899-8418 |
EISSN | 1097-0088 |
出版年 | 2017 |
卷号 | 37期号:13 |
文章类型 | Article |
语种 | 英语 |
国家 | Saudi Arabia; USA; Italy |
英文摘要 | This study examines the effects of convective parameterization schemes (CPSs) on the simulated June-September (JJAS) precipitation climatology, variability and predictability over southwestern Arabian Peninsula and northeast Africa during 1981-2014 within an atmospheric global climate model framework. The three CPSs used are: the simplified Arakawa-Schubert (SAS) scheme; the SAS scheme with Tokioka modification (STOK) and the Emanuel (EMAN) scheme coupled with a probability distribution function-based cloud parameterization scheme. SAS and STOK overestimate JJAS total precipitation over the selected domain compared to observations, while EMAN underestimates. EMAN provides the most realistic distribution of precipitation and spatial distribution of convective precipitation despite the tendency for underestimating the total precipitation. The principal patterns of precipitation variability (as measured by the leading empirical orthogonal functions) in EMAN and STOK are clearly related to the observed pattern, while the maximum variability in SAS occurs in a completely different location. The El Nino Southern Oscillation-related JJAS precipitation teleconnection simulated by the SAS scheme is very weak as compared to observations and other two CPSs. The signal-to-noise ratio estimated by SAS and STOK is very low as compared to EMAN. Correlation analysis shows that EMAN performs better than the other two CPSs. Low (high) outgoing longwave radiation (OLR) values are indicative of enhanced (suppressed) convection and hence more (less) cloud coverage. The root mean square error estimated for OLR in EMAN is lower than that of the other two CPSs. The vertical structure of specific humidity and temperature shows less error in EMAN than that of the other two CPSs, which could be a reason for better predictability over the region of interest. |
英文关键词 | Arabian Peninsula SAUDI-KAU AGCM SAS Tokioka modification Emanuel TRMM |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000414329800009 |
WOS关键词 | GENERAL-CIRCULATION MODEL ; CUMULUS CONVECTION ; INTRASEASONAL OSCILLATION ; BOREAL SUMMER ; PREDICTION ; ENSEMBLE ; PREDICTABILITY ; SYSTEM ; GCM ; PERFORMANCE |
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/37016 |
专题 | 气候变化 |
作者单位 | 1.King Abdulaziz Univ, CECCR, Dept Meteorol, POB 80208, Jeddah 21589, Saudi Arabia; 2.Columbia Univ, Dept Appl Phys & Appl Math, New York, NY USA; 3.Abdus Salaam Int Ctr Theoret Phys, Earth Syst Phys Sect, Trieste, Italy |
推荐引用方式 GB/T 7714 | Ehsan, Muhammad Azhar,39;Brien. Sensitivity of AGCM-simulated regional JJAS precipitation to different convective parameterization schemes[J]. INTERNATIONAL JOURNAL OF CLIMATOLOGY,2017,37(13). |
APA | Ehsan, Muhammad Azhar,&39;Brien.(2017).Sensitivity of AGCM-simulated regional JJAS precipitation to different convective parameterization schemes.INTERNATIONAL JOURNAL OF CLIMATOLOGY,37(13). |
MLA | Ehsan, Muhammad Azhar,et al."Sensitivity of AGCM-simulated regional JJAS precipitation to different convective parameterization schemes".INTERNATIONAL JOURNAL OF CLIMATOLOGY 37.13(2017). |
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