Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/joc.4792 |
Can significant trends be detected in surface air temperature and precipitation over South America in recent decades? | |
Soares, Daniel de Barros1,2; Lee, Huikyo3; Loikith, Paul C.4; Barkhordarian, Armineh1; Mechoso, Carlos R.1 | |
2017-03-15 | |
发表期刊 | INTERNATIONAL JOURNAL OF CLIMATOLOGY
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ISSN | 0899-8418 |
EISSN | 1097-0088 |
出版年 | 2017 |
卷号 | 37期号:3 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; France |
英文摘要 | Trends in near-surface air temperature and precipitation over South America are examined for the periods 1975-2004 and 1955-2004, respectively, using multiple observational and climate model data sets. The results for observed near-surface air temperature show an overall warming trend over much of the continent, with the largest magnitudes over central Brazil. These observed trends are found to be statistically significant using pre-industrial control simulations from the fifth phase of the Coupled Model Intercomparison Project (CMIP5) as the baseline to estimate natural climate variability. The observed trends are compared with those obtained in natural-only CMIP5 simulations, in which only natural forcings (i.e. volcanoes and solar variability) are included, and in historical CMIP5 simulations, in which anthropogenic forcings (i.e. changes in the atmospheric composition) are further incorporated. The historical CMIP5 simulations are more successful in capturing the observed temperature trends than the simulations with natural forcings only. It is suggested that anthropogenic warming is already evident over much of South America. Unlike the warming trends, observed precipitation trends over South America are less spatially coherent with both negative and positive values across the continent. Significant positive trends are found over South America in only one of the data sets used, and over a region that roughly encompasses the southern part of La Plata Basin (southern Brazil, Uruguay, and northeastern Argentina) in all data sets used. The historical CMIP5 simulations do not capture this feature. No firm conclusions are reached, therefore, for anthropogenic influences on precipitation changes in the period selected for study. |
英文关键词 | temperature trends precipitation trends South America CMIP5 models |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000395349500026 |
WOS关键词 | EARTH SYSTEM MODEL ; COUPLED MODEL ; BASIC EVALUATION ; CLIMATE ; RAINFALL ; PACIFIC ; CMIP5 ; VARIABILITY ; SIMULATION ; STREAMFLOW |
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/37722 |
专题 | 气候变化 |
作者单位 | 1.Univ Calif Los Angeles, Dept Atmospher & Ocean Sci, Los Angeles, CA 90024 USA; 2.Ecole Polytech, Palaiseau, France; 3.CALTECH, Jet Prop Lab, Pasadena, CA USA; 4.Portland State Univ, Dept Geog, POB 751 GEOG, Portland, OR 97207 USA |
推荐引用方式 GB/T 7714 | Soares, Daniel de Barros,Lee, Huikyo,Loikith, Paul C.,et al. Can significant trends be detected in surface air temperature and precipitation over South America in recent decades?[J]. INTERNATIONAL JOURNAL OF CLIMATOLOGY,2017,37(3). |
APA | Soares, Daniel de Barros,Lee, Huikyo,Loikith, Paul C.,Barkhordarian, Armineh,&Mechoso, Carlos R..(2017).Can significant trends be detected in surface air temperature and precipitation over South America in recent decades?.INTERNATIONAL JOURNAL OF CLIMATOLOGY,37(3). |
MLA | Soares, Daniel de Barros,et al."Can significant trends be detected in surface air temperature and precipitation over South America in recent decades?".INTERNATIONAL JOURNAL OF CLIMATOLOGY 37.3(2017). |
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