Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/joc.5294 |
Climatic and synoptic characterization of heat waves in Brazil | |
Geirinhas, Joao L.1; Trigo, Ricardo M.1; Libonati, Renata2; Coelho, Caio A. S.3; Palmeira, Ana Cristina2 | |
2018-03-30 | |
发表期刊 | INTERNATIONAL JOURNAL OF CLIMATOLOGY |
ISSN | 0899-8418 |
EISSN | 1097-0088 |
出版年 | 2018 |
卷号 | 38期号:4页码:1760-1776 |
文章类型 | Article |
语种 | 英语 |
国家 | Portugal; Brazil |
英文摘要 | According to the latest global and regional circulation models, the probability of occurrence of large heat waves (HWs), such as the 2003 European or the 2010 Russian events will increase significantly in the following decades under most climate scenarios. Currently, there are numerous studies for the Northern Hemisphere characterizing HWs and evaluating their impacts in several areas such as public health, economy, and agriculture. However, over South America, and in particular for Brazil, similar analysis is lacking despite its large geographical extension and numerous population potentially affected. Here we perform an assessment of HW events and characteristics recorded in six large Brazilian cities during the last five decades. The performed analysis reveals the existence of positive and significant trends in HW frequency since the 1980s, particularly for the cities of SAo Paulo, Manaus, and Recife. Over the last decades, Brasilia was the city that recorded the highest number of days per year under a HW regime, contrasting with Rio de Janeiro that recorded the lowest value. The assessment of the large-scale atmospheric circulation patterns associated with summer HWs, indicated for Porto Alegre, SAo Paulo, Rio de Janeiro, and Brasilia the presence of well-marked concentric and positive 500 hPa geopotential height anomalies followed by positive 850 hPa temperature anomalies. These anomalies are likely associated with quasi-stationary anticyclonic systems promoted by anomalous westward displacements of the South Atlantic Subtropical High System which are related to a weakening of other transients (and non-transient) systems such the Intertropical Convergence Zone (ITCZ) and the South Atlantic Convergence Zone. For Manaus, the identified anomalies are linked to a northward displacement of the ITCZ. This configuration is compatible with an increase in solar radiative pattern and decreased soil moisture, enhancing surface temperature values, possibly associated with positive feedback mechanisms between soil and the atmosphere. |
英文关键词 | heat waves Brazil atmospheric circulation patterns |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000427011700012 |
WOS关键词 | LEVEL JET EAST ; SOUTH-AMERICA ; SAO-PAULO ; TEMPERATURE VARIABILITY ; EXTREME EVENTS ; SUMMER ; MORTALITY ; PRECIPITATION ; TRENDS ; IMPACTS |
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/36753 |
专题 | 气候变化 |
作者单位 | 1.Univ Lisbon, Inst Dom Luiz, Fac Ciencias, Lisbon, Portugal; 2.Univ Fed Rio de Janeiro, Inst Geociencias, Dept Meteorol, Av Athos da Silveira Ramos 274,Bl G,Cidade Univ, BR-21941916 Rio De Janeiro, RJ, Brazil; 3.INPE, CPTEC, Cachoeira Paulista, SP, Brazil |
推荐引用方式 GB/T 7714 | Geirinhas, Joao L.,Trigo, Ricardo M.,Libonati, Renata,et al. Climatic and synoptic characterization of heat waves in Brazil[J]. INTERNATIONAL JOURNAL OF CLIMATOLOGY,2018,38(4):1760-1776. |
APA | Geirinhas, Joao L.,Trigo, Ricardo M.,Libonati, Renata,Coelho, Caio A. S.,&Palmeira, Ana Cristina.(2018).Climatic and synoptic characterization of heat waves in Brazil.INTERNATIONAL JOURNAL OF CLIMATOLOGY,38(4),1760-1776. |
MLA | Geirinhas, Joao L.,et al."Climatic and synoptic characterization of heat waves in Brazil".INTERNATIONAL JOURNAL OF CLIMATOLOGY 38.4(2018):1760-1776. |
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