Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/joc.5791 |
Assessing the impact of El Nino-Southern Oscillation on South African temperatures during austral summer | |
Lakhraj-Govender, Rakhee1,2; Grab, Stefan W.2 | |
2019 | |
发表期刊 | INTERNATIONAL JOURNAL OF CLIMATOLOGY
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ISSN | 0899-8418 |
EISSN | 1097-0088 |
出版年 | 2019 |
卷号 | 39期号:1页码:143-156 |
文章类型 | Article |
语种 | 英语 |
国家 | South Africa |
英文摘要 | Using composite analysis, the timing and extent of El Nino-Southern Oscillation (ENSO) impacts on maximum (T-max) and minimum temperatures (T-min) during austral summer are investigated for South Africa over the period 1940-2016. Pearson correlation coefficients determined between temperature data at stations within regions indicate that temperature records are coherent. During austral summer, composite analysis exhibits positive T-max/T-min anomalies for El Nino years while negative anomalies are recorded during La Nina years across all regions of South Africa. Statistical significance of composite average temperature anomalies was determined using the Student's t-test. T-max for El Nino years are significantly different from the neutral years over the central interior of South Africa for the period 1940-2016. The most notable finding of this study is that El Nino events have had a stronger warming effect during austral summer over many regions in South Africa after the late 1970s, than before. Such an impact has been most prominent over the northern and central interior regions, where, respectively, associated T-max record an average of 1.1 degrees C and 0.73 degrees C higher values for the period 1979-2016 compared to the earlier period (1940-1978). Chi-squared statistics indicate that ENSO phases exert a stronger influence on temperatures over the interior of South Africa than along the coast. |
英文关键词 | El Nino La Nina South Africa surface air temperatures teleconnections |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000459638400012 |
WOS关键词 | SURFACE AIR-TEMPERATURE ; CLIMATE VARIABILITY ; DECADAL VARIABILITY ; ENSO EVENTS ; RAINFALL ; PRECIPITATION ; PACIFIC ; TELECONNECTION ; STREAMFLOW ; TRENDS |
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/37141 |
专题 | 气候变化 |
作者单位 | 1.Tshwane Univ Technol, Sch Environm Water & Earth Sci, 175 Nelson Mandela Dr,Arcadia Campus, ZA-0001 Pretoria, South Africa; 2.Univ Witwatersrand, Sch Geog Archaeol & Environm Studies, Johannesburg, South Africa |
推荐引用方式 GB/T 7714 | Lakhraj-Govender, Rakhee,Grab, Stefan W.. Assessing the impact of El Nino-Southern Oscillation on South African temperatures during austral summer[J]. INTERNATIONAL JOURNAL OF CLIMATOLOGY,2019,39(1):143-156. |
APA | Lakhraj-Govender, Rakhee,&Grab, Stefan W..(2019).Assessing the impact of El Nino-Southern Oscillation on South African temperatures during austral summer.INTERNATIONAL JOURNAL OF CLIMATOLOGY,39(1),143-156. |
MLA | Lakhraj-Govender, Rakhee,et al."Assessing the impact of El Nino-Southern Oscillation on South African temperatures during austral summer".INTERNATIONAL JOURNAL OF CLIMATOLOGY 39.1(2019):143-156. |
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