Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1016/j.atmosres.2018.06.009 |
Secular variation of rainfall regime in the central region of Argentina | |
de La Casa, Antonio C.; Ovando, Gustavo G.; Diaz, Guillermo J. | |
2018-11-15 | |
发表期刊 | ATMOSPHERIC RESEARCH |
ISSN | 0169-8095 |
EISSN | 1873-2895 |
出版年 | 2018 |
卷号 | 213页码:196-210 |
文章类型 | Article |
语种 | 英语 |
国家 | Argentina |
英文摘要 | Apart from modifying the total amount of rain, another emerging impact of global warming on the rainfall regime could be an increase in the frequency and intensity of events, as well as their greater variability over time and space. The objectives of this work were to evaluate the long-term climatic variation of the precipitation regime in the central region of Argentina, determining the intensity and nature of the changes, and also examining the two typical modalities of representing the trend of change: linear and periodic models. Rainfall records were analyzed of the Cordoba Observatorio and Pilar Observatorio weather stations, as from 1910 and 1925 respectively, which belong to the Servicio Meteorologico Nacional (SMN) official network, and from a rain gauge located in Colonia Caroya, with data available as from 1929, that were selected by extension criteria, temporal integrity and geographical proximity. The non-parametric Mann-Kendall test (M-K) was used to identify the nature of the change, and the Theil-Sen (T-S) to evaluate intensity. These determine a significant linear trend (P < 0.05) in the region for total amount (PP) of rainfall, number of events (DPP), proportion of warm semester rainfall with respect to annual value, intensity (INT and PPmax) and variability, both annually and for the warm semester, when most of the annual rainfall occurs. However, adjusting these rainfall series to a simple sine function reveals a periodic behavior that explains a greater proportion of the observed variability with respect to the linear model, showing a negative phase of PP, DPP and PPmax during the period 1930-1950, which subsequently becomes positive between 1970 and 2000. Rainfall variability presents great dispersion in the region so neither the sine function nor the third-degree polynomial were appropriate to represent its long-term behavior. The linear trend loses statistical significance when the periodic behavior is incorporated into the analysis, leaving open the question about the influence of global warming on changes in the hydrological cycle and particularly on the rainfall regime in the central territory of Argentina. |
英文关键词 | Rainfall regime Climate change Trend Linear model Periodic model |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000442169800017 |
WOS关键词 | CLIMATE VARIABILITY ; PRECIPITATION EXTREMES ; RIVER-BASIN ; TRENDS ; OSCILLATION ; VARIABLES ; CORDOBA ; PERIOD |
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/15209 |
专题 | 地球科学 |
作者单位 | Univ Nacl Cordoba, Fac Ciencias Agr, Ing Agr Felix Aldo Marrone 746,Ciudad Univ, RA-5000 Cordoba, Argentina |
推荐引用方式 GB/T 7714 | de La Casa, Antonio C.,Ovando, Gustavo G.,Diaz, Guillermo J.. Secular variation of rainfall regime in the central region of Argentina[J]. ATMOSPHERIC RESEARCH,2018,213:196-210. |
APA | de La Casa, Antonio C.,Ovando, Gustavo G.,&Diaz, Guillermo J..(2018).Secular variation of rainfall regime in the central region of Argentina.ATMOSPHERIC RESEARCH,213,196-210. |
MLA | de La Casa, Antonio C.,et al."Secular variation of rainfall regime in the central region of Argentina".ATMOSPHERIC RESEARCH 213(2018):196-210. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论