Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/joc.6229 |
The diurnal cycle of precipitation over South America represented by five gridded datasets | |
Giles, Julian A.1,2,3; Ruscica, Romina C.1,2,3; Menendez, Claudio G.1,2,3,4 | |
2019-08-05 | |
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 | Argentina |
英文摘要 | A characterization of the diurnal cycle of precipitation (DCP) over the whole South America is still lacking in the literature and the scarcity of sub-daily rain ground measurements limits the data available for analysis and forbids a correct validation of alternative datasets. In this paper we analyse the climatological mean DCP during the monsoon active season using five gridded datasets: two satellite precipitation estimates, two regional climate models and one reanalysis. Amazonia, the Brazilian Highlands, the northeastern South American coast, the Andes and the western Colombian coast are identified as the areas with most prominent DCPs. The afternoon convection triggered by solar heating over land and the coastal and topographic effects are the main modes of sub-daily variability, based on an EOF decomposition of the 3 hourly mean precipitation fields. We explore the contribution of mean frequency and intensity to amount of precipitation and nighttime-daytime differences. In general, both models precipitate earlier and more frequently than the satellite products and do not reproduce correctly areas of observed predominant nighttime precipitation where mesoscale convective systems are active, like La Plata Basin or Amazonia. Over the analysed areas, the high frequency of precipitation is the driving mechanism of total amount in the models, whereas in the satellite products there is also considerable contribution from intensity. Overall, the reanalysis shows features in between the models and the satellite estimates, sharing characteristics with both types of data. The results presented here point at the diversity of sub-daily precipitation characteristics in South America, the issues with conventional climate models and the uncertainty in satellite products and reanalyses. The growing interest in the DCP by the scientific community and the development of new techniques like convection permitting modelling will hopefully continue to improve our knowledge of the precipitation dynamics and its influence on climate. |
英文关键词 | diurnal cycle of precipitation gridded data nighttime-daytime differences reanalysis regional climate models satellite precipitation products South America sub-daily variability |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000478999000001 |
WOS关键词 | LOW-LEVEL JET ; ATMOSPHERE INTERACTION ; CLIMATE ; RAINFALL ; VARIABILITY ; PERFORMANCE ; CONVECTION ; INTENSITY ; ENSEMBLE ; SURFACE |
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/185919 |
专题 | 气候变化 |
作者单位 | 1.UBA, FCEN, Buenos Aires, DF, Argentina; 2.UBA, CONICET, CIMA, Buenos Aires, DF, Argentina; 3.UBA, CONICET, IFAECI, UMI 3351,CNRS,IRD, Buenos Aires, DF, Argentina; 4.UBA, FCEN, Dept Ciencias Atmosfera & Oceanos, Buenos Aires, DF, Argentina |
推荐引用方式 GB/T 7714 | Giles, Julian A.,Ruscica, Romina C.,Menendez, Claudio G.. The diurnal cycle of precipitation over South America represented by five gridded datasets[J]. INTERNATIONAL JOURNAL OF CLIMATOLOGY,2019. |
APA | Giles, Julian A.,Ruscica, Romina C.,&Menendez, Claudio G..(2019).The diurnal cycle of precipitation over South America represented by five gridded datasets.INTERNATIONAL JOURNAL OF CLIMATOLOGY. |
MLA | Giles, Julian A.,et al."The diurnal cycle of precipitation over South America represented by five gridded datasets".INTERNATIONAL JOURNAL OF CLIMATOLOGY (2019). |
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