Changes of precipitation extremes indices in Sao Francisco River Basin, Brazil from 1947 to 2012

被引：63
作者：
Bezerra, Bergson G. [1 ]
Silva, Lindenberg L. [2 ]
Santos e Silva, Claudio M. [1 ]
de Carvalho, Gilvani Gomes [1 ]
机构：
[1] Univ Fed Rio Grande do Norte, Dept Atmospher & Climat Sci, Campus Univ Lagoa Nova, BR-59078970 Natal, RN, Brazil
[2] Execut Agcy Water Management Paraiba State AESA, Ave Aprigio Veloso,882 Bodocongo,Bloco CQ, BR-58109970 Campina Grande, Brazil
来源：
THEORETICAL AND APPLIED CLIMATOLOGY | 2019年 / 135卷 / 1-2期
关键词：
DAILY CLIMATE EXTREMES; SOBRADINHO LAKE AREA; ATMOSPHERIC VARIATIONS; DAILY TEMPERATURE; SOIL OCCUPATION; UNITED-STATES; TRENDS; NORTHEAST; CHINA; VARIABILITY;
D O I：
10.1007/s00704-018-2396-6
中图分类号：
P4 [大气科学（气象学）];
学科分类号：
0706 ; 070601 ;
摘要：
The Sao Francisco River is strategically important due to its hydroelectric potential and for bringing the largest water body of Brazilian Semiarid region, supplying water for irrigation, urban, and industrial activities. Thereby, for the purpose of characterizing changes on the precipitation patterns over Sao Francisco River basin, 11 extremes precipitation indices as defined by the joint WMO/CCI/ETCCDMI/CLIVAR project were calculated using daily observation from the 59 rain gauges during 1947-2012 period. The extreme climatic indices were calculated with the RClimDex software, which performs an exhaustive data quality control, intending to identify spurious errors and dataset inconsistencies. Weak and significant regional changes were observed in both CDD and SDII indices. Most precipitation extremes indices decreased but without statistical significance. The spatial analysis of indices did not show clearly regional changes due to the complexity of hydrometeorology of the region. In some cases, two rainfall stations exhibited opposite trends with the same significance level although they are separated by a few kilometers. This has occurred more frequently in Lower-Middle Sao Francisco, probably associated with intense land cover change over the last decades in this region.
引用
收藏
页码：565 / 576
页数：12
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