Medeiros Felipe J DE, Oliveira Cristiano P DE, Gomes Rafaela Dos S, Silva Maria L DA, Cabral Júnior Jório B
Programa de Pós-Graduação em Ciências Climáticas, Universidade Federal do Rio Grande do Norte, Campus Universitário Lagoa Nova, 59078-970 Natal, RN, Brazil.
Secretaria do Meio Ambiente e dos Recursos Hídricos (SEMARH-RN), Rua Dona Maria Câmara, 1884, 59082-430 Natal, RN, Brazil.
An Acad Bras Cienc. 2021 Mar 17;93(1):e20200198. doi: 10.1590/0001-3765202120200198. eCollection 2021.
Various studies have identified that between 2012 and 2017, Brazil's semiarid region suffered severe drought. However, few studies have analyzed whether this drought also affected the eastern coastal region of Northeast Brazil (ENEB). Therefore, the objective of this work is to identify rainfall anomalies in these regions and verify the hydrometeorological impact on reservoirs in the 2012-2017 interval. For this purpose, we used precipitation data and atmospheric variables in the period from 1981 to 2017 to investigate the rainy season and associated dynamic patterns, as well as the consequences of these mechanisms on the variation of the water parameters of important reservoirs. The results indicated that rain events in the ENEB during 2012-2017 presented similar climatological behavior, without the characteristic of a drought event as observed in the semiarid region. The meteorological analyses showed that the combination of convergence with moisture over the Atlantic Ocean possibly favored greater frequency of shallow convective rainfall in ENEB, an important factor to explain the absence of generalized negative anomalies in the region. As a consequence, the reservoirs did not suffer from water collapse, unlike in the semiarid region.
多项研究表明，在2012年至2017年期间，巴西半干旱地区遭受了严重干旱。然而，很少有研究分析这场干旱是否也影响了巴西东北部的东部沿海地区（ENEB）。因此，这项工作的目的是确定这些地区的降雨异常情况，并验证2012 - 2017年期间水文气象对水库的影响。为此，我们使用了1981年至2017年期间的降水数据和大气变量，以研究雨季及相关动态模式，以及这些机制对重要水库水参数变化的影响。结果表明，2012 - 2017年期间ENEB的降雨事件呈现出相似的气候特征，没有半干旱地区所观察到的干旱事件特征。气象分析表明，大西洋上空辐合与水汽的结合可能有利于ENEB地区浅对流降雨频率增加，这是解释该地区没有普遍负异常的一个重要因素。因此，与半干旱地区不同，这些水库没有出现水枯竭情况。
