Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/joc.6314 |
Characterizing rainfall in the south-western Cape, South Africa: 1841-2016 | |
Ndebele, Nothabo E.1; Grab, Stefan2; Turasie, Alemtsehai3 | |
2019-11-08 | |
发表期刊 | INTERNATIONAL JOURNAL OF CLIMATOLOGY |
ISSN | 0899-8418 |
EISSN | 1097-0088 |
出版年 | 2019 |
文章类型 | Article;Early Access |
语种 | 英语 |
国家 | South Africa; USA |
英文摘要 | The rainfall series from the South African Astronomical Observatory in Cape Town, South Africa, is one of the longest known single site instrumental records in the southern hemisphere, spanning over 176 years. Rainfall data are analysed to determine trends and periodicity in the series for annual, seasonal and monthly time scales. Using the Mann Kendall test and Sen's slope, significant negative rainfall trends are recorded for the months of March and October, and for the spring season (from September to November). Using the Mann Kendall and its modified versions to account for serial correlation, as well as a multi-temporal trend analysis, we demonstrate a positive rainfall trend during the first 60 years (i.e., 1841-1900), which thereafter changes to a long-term (1900-2016) negative trend, but incorporating a shorter 40 years significant positive trend between 1930 and 1970. We identify cyclic patterns with recorded periods of 9-12 years, 16-30 years and 30-42 years for rainfall, the Southern annular mode (SAM) and Southern oscillation index (SOI). In addition to the notable 9-12 years rainfall cycle that is evidently associated with sunspot cycles, 20-30 years and longer 32-40 years rainfall, solar, SAM and SOI cycles are also identified. |
英文关键词 | Cape Town Mann Kendall test continuous wavelet analysis periodicity rainfall trends sunspots |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000495116500001 |
WOS关键词 | KENDALL TREND TEST ; WAVELET TRANSFORM ; SOLAR-ACTIVITY ; DETECT TREND ; ADDIS-ABABA ; PRECIPITATION ; VARIABILITY ; TEMPERATURE ; TIME ; RECORD |
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/225414 |
专题 | 环境与发展全球科技态势 |
作者单位 | 1.Univ Witwatersrand, Sch Stat & Actuarial Sci, Johannesburg, South Africa; 2.Univ Witwatersrand, Sch Geog Archaeol & Environm Studies, Johannesburg, South Africa; 3.New Jersey City Univ, Dept Math, Jersey City, NJ USA |
推荐引用方式 GB/T 7714 | Ndebele, Nothabo E.,Grab, Stefan,Turasie, Alemtsehai. Characterizing rainfall in the south-western Cape, South Africa: 1841-2016[J]. INTERNATIONAL JOURNAL OF CLIMATOLOGY,2019. |
APA | Ndebele, Nothabo E.,Grab, Stefan,&Turasie, Alemtsehai.(2019).Characterizing rainfall in the south-western Cape, South Africa: 1841-2016.INTERNATIONAL JOURNAL OF CLIMATOLOGY. |
MLA | Ndebele, Nothabo E.,et al."Characterizing rainfall in the south-western Cape, South Africa: 1841-2016".INTERNATIONAL JOURNAL OF CLIMATOLOGY (2019). |
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