GSTDTAP  > 气候变化
DOI10.1002/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
ISSN0899-8418
EISSN1097-0088
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
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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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