Pesquisa Agropecuária Brasileira
Print version ISSN 0100-204X
BACK, Álvaro José; BRUNA, Emilio Della and VIEIRA, Hamilton Justino. Climate trends and production of grapes in the Region of Goethe Grape Valleys, Brazil. Pesq. agropec. bras. [online]. 2012, vol.47, n.4, pp. 497-504. ISSN 0100-204X. http://dx.doi.org/10.1590/S0100-204X2012000400004.
The objective of this work was to evaluate the trends in climate series and in agroclimatic indices for growing vines in the Region of Goethe Grape Valleys, in the state of Santa Catarina, Brazil. The Region has a mesothermal humid climate. Maximum and minimum air temperatures, from the years 1924 to 2010, and rainfall data from 1955 to 2010 were used. The Mann‑Kendall's test was used to evaluate the series trend, whose magnitude was estimated by the median slope determined by the Theil-Sen test. An increase trend was observed in the series of minimum air temperature, at the annual scale, as well as in the seasons of the year. For the maximum air temperature, there was a significant increase trend only in in the summer series. For the agrometeorological indices, a significant trend of decrease in the number of frost events was observed, reduction of the time between sprouting and harvesting, and increase trends in thermal summation and on the Huglin´s and cold indexes. Increase trends were evidenced for the annual total rainfall and for rainfall during the vine growth period, as well as for the number of days with rain equal to or higher than 20 mm, and for the minimum and night temperatures.
Keywords : global warming; climatology; cold index; global change; pluvial precipitation; thermal summation.