Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/joc.5786 |
Global bimodal precipitation seasonality: A systematic overview | |
Knoben, Wouter J. M.1; Woods, Ross A.1; Freer, Jim E.2 | |
2019 | |
发表期刊 | INTERNATIONAL JOURNAL OF CLIMATOLOGY |
ISSN | 0899-8418 |
EISSN | 1097-0088 |
出版年 | 2019 |
卷号 | 39期号:1页码:558-567 |
文章类型 | Article |
语种 | 英语 |
国家 | England |
英文摘要 | Global precipitation patterns lead to differences in seasonal distributions of rainfall between locations in the form of alternating dry and wet seasons. Many locations experience a single wet and dry season per year, but some studies report the occurrence of two wet and dry seasons per year. This bimodal rainfall pattern is commonly associated with locations within the tropics but is reported outside the tropics as well. However, this information is fragmented, and studies of bimodality are mainly restricted to monthly rainfall totals. Here, we use a gridded global data set and simple harmonic analysis to provide a systematic overview of global bimodal rainfall and rain-day frequency. We find good agreement between the various regional studies concerning bimodal precipitation and our global overview, showing that bimodal rainfall occurs on approximately 7% of the global land surface. In the tropics, regions of bimodal rainfall totals (P) and regions of bimodal rain-day frequency (N) tend to overlap due to the presence of dry seasons that have zero precipitation. Outside the tropics, P and N are more independent, which leads to complex within-year patterns of precipitation intensity. A secondary outcome of our results is an improved low-dimensional global parameterization of monthly rainfall regimes. Our results provide the first gridded global overview of bimodal rainfall patterns and show the usefulness of simple mathematical approaches for detecting patterns in large data sets. |
英文关键词 | analytical framework bimodal seasonality global climate rainfall |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000459638400040 |
WOS关键词 | GRIDDED PRECIPITATION ; RAINFALL SEASONALITY ; SURFACE TEMPERATURE ; SIMPLEX-METHOD ; SOUTH-AMERICA ; CLIMATE ; VARIABILITY ; PATTERNS ; SERIES |
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/36933 |
专题 | 气候变化 |
作者单位 | 1.Univ Bristol, Dept Civil Engn, Woodland Rd 93-95, Bristol BS8 1US, Avon, England; 2.Univ Bristol, Sch Geog Sci, Bristol, Avon, England |
推荐引用方式 GB/T 7714 | Knoben, Wouter J. M.,Woods, Ross A.,Freer, Jim E.. Global bimodal precipitation seasonality: A systematic overview[J]. INTERNATIONAL JOURNAL OF CLIMATOLOGY,2019,39(1):558-567. |
APA | Knoben, Wouter J. M.,Woods, Ross A.,&Freer, Jim E..(2019).Global bimodal precipitation seasonality: A systematic overview.INTERNATIONAL JOURNAL OF CLIMATOLOGY,39(1),558-567. |
MLA | Knoben, Wouter J. M.,et al."Global bimodal precipitation seasonality: A systematic overview".INTERNATIONAL JOURNAL OF CLIMATOLOGY 39.1(2019):558-567. |
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