Statistical downscaling in the TRMM satellite rainfall estimates for the Goiás state and the Federal District, Brazil

Abstract

Rainfall is a fundamental component of agricultural production, and knowing its potential and variability can ensure the success of this activity. However, the number of meteorological stations is still small, even in states with agricultural aptitude, such as Goiás. Geoprocessing techniques can be used to overcome this problem. Thus, this study aimed to evaluate the products of the Tropical Rainfall Measuring Mission (TRMM) satellite to describe the annual and monthly rainfall variability in the Goiás state and the Federal District (Brazil). Interpolations were carried out to increase the spatial resolution by means of ordinary kriging and cluster analysis for spatial and temporal distribution. It was observed that the evaluated territory can be classified into three regions with differentiated water regimes up to 500 mm annually, with seasonality of accumulated precipitation from November to March. Even though the regression evaluation showed limitations for a monthly precipitation above 200 mm, the analysis of the TRMM satellite products demonstrated that this tool allows forecasts of provisional normals with a higher spatial resolution than the Brazilian National Institute of Meteorology (INMET) stations network, with known measurement errors for each evaluation period, allowing the data application in forecast models for agricultural planning involving water management.

Seroprevalence of Equine Leptospirosis in the State of Goiás, Brazil

“…However, only two studies on equine leptospirosis have been performed in Goiás, and these were restricted to a few municipalities. In these studies, the frequency of the disease in horses and the prevalence of seropositive animals ranged from 14.4% [11] to 45.05% [12]. Thus, the results of the present study indicate a higher prevalence of seropositive animals than in previous studies, and this is the first study in which animals from the entire state were evaluated.…”

“…Studies on seroprevalence and isolation have shown that horses are susceptible to a wide range of incidental infections, including serovars of the Pomona and Grippotyphosa serogroups, as well as the Icterohaemorrhagiae, Autumnalis, Sejroe, Canicola, and Ballum serogroups [2]. However, few studies have evaluated the prevalence of leptospirosis in horses in the Central-West region of Brazil and in the state of Goiás, located in the tropical savanna (Cerrado), data on the seroprevalence of equine leptospirosis are scarce and restricted to a few municipalities [11,12]. Thus, the aim of the present study was to determine the seroprevalence of Leptospira spp.…”