Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/joc.5892 |
Seasonal climate and the onset of the rainy season in western-central Brazil simulated by Global Eta Framework model | |
Latinovic, Dragan1; Chou, Sin Chan1; Rancic, Miodrag2; Medeiros, Gustavo Sueiro1; Lyra, Andre de Arruda1 | |
2019-03-15 | |
发表期刊 | INTERNATIONAL JOURNAL OF CLIMATOLOGY |
ISSN | 0899-8418 |
EISSN | 1097-0088 |
出版年 | 2019 |
卷号 | 39期号:3页码:1429-1445 |
文章类型 | Article |
语种 | 英语 |
国家 | Brazil; USA |
英文摘要 | The seasonal cycle of precipitation in tropical South America is determined by the monsoonal system. The transition from dry to wet season occurs in austral spring (September-November, SON) when intense convection from northwestern South America rapidly shifts southwards to the southern Amazon Basin and western-central Brazil (WCB) in October and further to the southeast of Brazil in November. This study evaluates ability of the global atmospheric model, Global Eta Framework (GEF), at 25-km horizontal resolution, to simulate the onset of the rainy season in WCB region. The simulations are based on a five-member ensemble seasonal integrations for the years 2011 and 2013. Evaluation of mean global simulated fields, such as 200-hPa wind, 500-hPa geopotential height, 850-hPa temperature and wind, and MSLP at the surface, for the SON period indicates high level of agreement with reanalyses and observations, both in spatial distribution and intensity for most of the variables. The variable of the lowest skill is precipitation, which is overestimated over some tropical oceanic regions and underestimated over tropical continental regions, including South America. The onset of the rainy season is determined using methods based on precipitation and outgoing long-wave radiation (OLR). The threshold based on simulated precipitation is also calculated as an alternative method for defining monsoon onset. Comparison of the 5-day averaged values (pentads) of precipitation and OLR of all members of the ensemble and the ensemble mean against the observed data shows the ability of GEF to reproduce the typical pattern of transition from dry to wet season in WCB, although most of ensemble members tend to underestimate precipitation and overestimate OLR. The onset date is delayed for few pentads in the model simulations. |
英文关键词 | GEF Eta model monsoon onset rainy season South America |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000461606600020 |
WOS关键词 | STEP-MOUNTAIN COORDINATE ; AMERICAN MONSOON SYSTEM ; SOUTH-AMERICA ; RAINFALL ; AMAZON ; PRECIPITATION ; CIRCULATION ; REANALYSIS ; PARAMETERIZATION ; IMPLEMENTATION |
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/37251 |
专题 | 气候变化 |
作者单位 | 1.CPTEC INPE, BR-12630000 Cachoeira Paulista, SP, Brazil; 2.NOAA, IMSG, EMC, NCEP, College Pk, MD USA |
推荐引用方式 GB/T 7714 | Latinovic, Dragan,Chou, Sin Chan,Rancic, Miodrag,et al. Seasonal climate and the onset of the rainy season in western-central Brazil simulated by Global Eta Framework model[J]. INTERNATIONAL JOURNAL OF CLIMATOLOGY,2019,39(3):1429-1445. |
APA | Latinovic, Dragan,Chou, Sin Chan,Rancic, Miodrag,Medeiros, Gustavo Sueiro,&Lyra, Andre de Arruda.(2019).Seasonal climate and the onset of the rainy season in western-central Brazil simulated by Global Eta Framework model.INTERNATIONAL JOURNAL OF CLIMATOLOGY,39(3),1429-1445. |
MLA | Latinovic, Dragan,et al."Seasonal climate and the onset of the rainy season in western-central Brazil simulated by Global Eta Framework model".INTERNATIONAL JOURNAL OF CLIMATOLOGY 39.3(2019):1429-1445. |
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