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DOI	10.1016/j.wace.2020.100254
	Analysis of climate extremes indices over northeast Brazil from 1961 to 2014
	Costa, Rafaela Lisboa 1; de Mello Baptista, Gustavo Macedo 2; Gomes, Heliofabio Barros 1; dos Santos Silva, Fabricio Daniel 1; da Rocha Junior, Rodrigo Lins 1; Salvador, Mozar de Araujo 3; Herdies, Dirceu Luis 4
通讯作者	Costa, Rafaela Lisboa
来源期刊	WEATHER AND CLIMATE EXTREMES
ISSN	2212-0947
出版年	2020
卷号	28
英文摘要	An analysis of climate extremes indices was conducted for maximum temperatures (TMax), minimum temperatures (TMin), and daily rainfall data (PRCP) over the northeast region of Brazil for the period of 1961-2014. The indices were calculated for 96 weather stations using RClimDex software in a sub-regional study based on cluster analysis, as well as for each individual weather station, after a rigorous process of quality control, gap filling of missing values, and homogenization. The Mann-Kendall non-parametric trend test was employed to assess the statistical significance of the series. The results indicate unequivocal signs of heating. In the past decades, there were predominant trends of decrease in the percentage of cold nights (-8.4% days/decade), increase in the percentage of the number of warm nights (10.6% days/decade), increase in the number of days per decade in which the minimum temperature exceeded the threshold of 20 degrees C, and a trend showing an increase in heat waves. This was corroborated by the declining trend in the number of consecutive days in which TMin did not exceed the 10th percentile, and the increase in the number of consecutive days in which TMax exceeded the 90th percentile in the data distribution. With regard to PRCP, in most weather stations where there is a significant increase in consecutive dry days, there is also a trend of significant increase in consecutive wet days, thereby intensifying the seasonality, with the dry seasons becoming drier and the rainy seasons wetter. In most weather stations, a reduction was found in the total annual precipitation and in the frequency of rainy days. Moreover, in many stations, an increase in rainfall events that surpasses the threshold of 95% and 99% in the distribution was discovered. These factors highlight concerns of a region of Brazil marked by the scarcity of perennial water resources and the threat of desertification.
英文关键词	Trends Temperature Rainfall Regional and sub-regional analysis CLIMDEX
类型	Article
语种	英语
国家	Brazil
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000535923400004
WOS关键词	DAILY TEMPERATURE ; MONTHLY RAINFALL ; CLUSTER-ANALYSIS ; PRECIPITATION ; TRENDS ; VARIABILITY ; CIRCULATION ; ALAGOAS ; EVENTS ; IMPACT
WOS类目	Meteorology & Atmospheric Sciences
WOS研究方向	Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/319240
作者单位	1.Univ Fed Alagoas, Inst Ciencias Atmosfer ICAT, Av Lourival Melo Mota S-N, BR-57072900 Maceio, Alagoas, Brazil; 2.Univ Brasilia, Inst Geociencias, BR-70910900 Brasilia, DF, Brazil; 3.Inst Nacl Meteorol INMET Eixo Monumental, Via S1 Sudoeste, BR-70680900 Brasilia, DF, Brazil; 4.Inst Nacl Pesquisas Espaciais CPTEC INPE, Ctr Previsao Tempo & Estudos Climat, BR-12630000 Cachoeira Paulista, SP, Brazil
推荐引用方式 GB/T 7714	Costa, Rafaela Lisboa,de Mello Baptista, Gustavo Macedo,Gomes, Heliofabio Barros,et al. Analysis of climate extremes indices over northeast Brazil from 1961 to 2014[J],2020,28.
APA	Costa, Rafaela Lisboa.,de Mello Baptista, Gustavo Macedo.,Gomes, Heliofabio Barros.,dos Santos Silva, Fabricio Daniel.,da Rocha Junior, Rodrigo Lins.,...&Herdies, Dirceu Luis.(2020).Analysis of climate extremes indices over northeast Brazil from 1961 to 2014.WEATHER AND CLIMATE EXTREMES,28.
MLA	Costa, Rafaela Lisboa,et al."Analysis of climate extremes indices over northeast Brazil from 1961 to 2014".WEATHER AND CLIMATE EXTREMES 28(2020).