Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/joc.5169 |
Dominant atmospheric circulation patterns associated with abnormal rainfall events over Rwanda, East Africa | |
Ngarukiyimana, Jean Paul1; Fu, Yunfei1; Yang, Yuanjian1; Ogwang, Bob Alex2; Ongoma, Victor3; Ntwali, Didier4 | |
2018 | |
发表期刊 | INTERNATIONAL JOURNAL OF CLIMATOLOGY
![]() |
ISSN | 0899-8418 |
EISSN | 1097-0088 |
出版年 | 2018 |
卷号 | 38期号:1页码:187-202 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; Uganda |
英文摘要 | The study investigated the dominant atmospheric circulation patterns associated with abnormal rainfall over Rwanda during the March-May (MAM) rainfall season in 1981-2010. The data sets used in this study include: rainfall, wind, sea surface temperature (SST), and humidity. Correlation and composite analysis and Percent of Normal Index (PNI) were deployed in this study. In the wet years (1987, 1988, and 1998), the country was dominated by moisture convergence, which is in line with wind anomalies that exhibits strong westerly winds from the Atlantic Ocean and southeasterly winds originated from the Indian Ocean. These winds carry moist air mass passing over Congo to the study area, leading to wet events. On the other hand, easterly winds were noted over the study area during the dry years (1984, 2000, 2007, and 2008). The observed wet years coincided with the El Nino events, while the dry years are noted during the La Nina episodes. The dry years exhibited a wide spread of moisture divergence anomaly at the low level and were characterized by the sinking motion as opposed to the wet years with the rising motion. The anomalies of velocity potential/divergence further showed that the wet (dry) years were characterized by convergence (divergence) at the low level. The results also show that there exists a low positive correlation between mean MAM rainfall and SST over the Indian Ocean, which shows minimum influence of the Ocean. On the other hand, it was noted that rainfall amounts is significantly correlated at 95% confidence level with the elevation (altitude) of a given station. This study improves the understanding of the occurrence of wet and dry events in Rwanda, which is helpful in future monitoring of these events. |
英文关键词 | abnormal rainfall wet dry abnormal circulation Rwanda |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000419093600014 |
WOS关键词 | INDIAN-OCEAN ; SHORT RAINS ; LONG RAINS ; VARIABILITY ; DROUGHT ; CLIMATE ; DIAGNOSIS ; MONSOON ; DIPOLE ; CHINA |
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/37430 |
专题 | 气候变化 |
作者单位 | 1.Univ Sci & Technol China, Sch Earth & Space Sci, 96 Jinzhai Rd, Hefei 230026, Anhui, Peoples R China; 2.Uganda Natl Meteorol Author, Kampala, Uganda; 3.Nanjing Univ Informat Sci & Technol, Sch Atmospher Sci, Nanjing, Jiangsu, Peoples R China; 4.Chinese Acad Sci, Inst Atmospher Phys, Beijing, Peoples R China |
推荐引用方式 GB/T 7714 | Ngarukiyimana, Jean Paul,Fu, Yunfei,Yang, Yuanjian,et al. Dominant atmospheric circulation patterns associated with abnormal rainfall events over Rwanda, East Africa[J]. INTERNATIONAL JOURNAL OF CLIMATOLOGY,2018,38(1):187-202. |
APA | Ngarukiyimana, Jean Paul,Fu, Yunfei,Yang, Yuanjian,Ogwang, Bob Alex,Ongoma, Victor,&Ntwali, Didier.(2018).Dominant atmospheric circulation patterns associated with abnormal rainfall events over Rwanda, East Africa.INTERNATIONAL JOURNAL OF CLIMATOLOGY,38(1),187-202. |
MLA | Ngarukiyimana, Jean Paul,et al."Dominant atmospheric circulation patterns associated with abnormal rainfall events over Rwanda, East Africa".INTERNATIONAL JOURNAL OF CLIMATOLOGY 38.1(2018):187-202. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论