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DOI | 10.1002/joc.5319 |
Spatio-temporal pattern of meteorological droughts and its possible linkage with climate variability | |
Zhou, Han1,2; Liu, Yuanbo1 | |
2018-03-30 | |
发表期刊 | INTERNATIONAL JOURNAL OF CLIMATOLOGY |
ISSN | 0899-8418 |
EISSN | 1097-0088 |
出版年 | 2018 |
卷号 | 38期号:4页码:2082-2096 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | Spatial pattern of meteorological droughts is a critical element for investigating drought condition. Empirical orthogonal function (EOF) and rotated EOF (REOF) methods are widely used to discriminate dominant patterns. Previous works focused on case applications but left the associated physical meanings unexplored. This study employs the EOF, wavelet analysis, and stepwise regression methods to distinguish spatio-temporal patterns of meteorological droughts with pattern interpretation. For this purpose, monthly precipitation data were used from 73 meteorological stations in the Poyang Lake basin of China for the period of 1960-2007. Standardized Precipitation Index (SPI) was applied to quantify meteorological droughts. Our results identified four leading EOF/REOF patterns at the basin scale. Seasonal SPI series showed more dominant periods than monthly SPI series, indicating periodic complexity of regional droughts. The dominant periods coincided with those of the EOF/REOF time coefficients. The four leading EOF/REOFs were significantly related to the dominant time scales of 2, 3, 6, 11, 16, and 17 years, except for the fifth EOF/REOF. Stepwise regression analysis further indicated that the four leading EOF/REOFs be likely the superposition of SPI variation from inter-annual and inter-decadal scales. The SPI series at different time scales (1-36 months) showed significant correlations with climate teleconnection modes, confirming the existence of identified spatio-temporal pattern. The Nino3.4 and Southern Oscillation were the primary teleconnection modes that influenced the variability of meteorological droughts over the basin. The Pacific Decadal Oscillation and the North Atlantic Oscillation also contributed to the regional dry/wet alternation. The findings provide important implications for understanding spatial and temporal variation of regional droughts. |
英文关键词 | meteorological drought spatial pattern climate teleconnection Standardized Precipitation Index empirical orthogonal function |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000427011700035 |
WOS关键词 | POYANG LAKE BASIN ; SUMMER MONSOON ; SPATIAL VARIABILITY ; CAUTIONARY NOTE ; CHINA ; PRECIPITATION ; ENSO ; PDO ; INDEXES ; CIRCULATION |
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/37156 |
专题 | 气候变化 |
作者单位 | 1.Chinese Acad Sci, Nanjing Inst Geog & Limnol, Key Lab Watershed Geog Sci, Nanjing, Jiangsu, Peoples R China; 2.Univ Chinese Acad Sci, Beijing, Peoples R China |
推荐引用方式 GB/T 7714 | Zhou, Han,Liu, Yuanbo. Spatio-temporal pattern of meteorological droughts and its possible linkage with climate variability[J]. INTERNATIONAL JOURNAL OF CLIMATOLOGY,2018,38(4):2082-2096. |
APA | Zhou, Han,&Liu, Yuanbo.(2018).Spatio-temporal pattern of meteorological droughts and its possible linkage with climate variability.INTERNATIONAL JOURNAL OF CLIMATOLOGY,38(4),2082-2096. |
MLA | Zhou, Han,et al."Spatio-temporal pattern of meteorological droughts and its possible linkage with climate variability".INTERNATIONAL JOURNAL OF CLIMATOLOGY 38.4(2018):2082-2096. |
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