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Type: Artigo de evento
Title: The Occurrence Of Heat Waves In Sao Paulo - Brazil Using Temperature Humidity Index (thi) And Milk Decline Index (mdec)
Author: De Lima K.A.O.
De Moura D.J.
Naas I.D.A.
Abstract: Climate is not simply defined by the average temperature and precipitation, but also by the type, frequency and intensity of weather events. The climatic changes have the potential to alter the prevalence and severity of extremes, such as, storms, droughts and heatwaves (IPCC, 2007). A heat wave is a period of abnormal intense heat generally followed by high relative humidity with the duration of at least one day; however, conventionally being extended by some days or even some weeks (AhiS, 1989). The occurrence of heat waves can cause heat stress that input a negative influence on animal production. Thus, this research had as its general objective to estimate milk production losses as function of heat wave incidence in Sao Paulo state based on the average temperature and humidity index (THI). A historical of heat wave occurrence was developed based on climatic data over an interval of two to ten years. The estimated average milk production loss in the major dairy regions was also quantified during the identified heat wave periods. The results showed that the counties within the Vale do Paraiba dairy region as well as Presidente Prudente - Sao Paulo presented the highest number of heat waves per year, and that not always the heat wave with longest period presented higher intensity of occurrence. The conclusion is that the study of heat wave occurrence shows in a more effective way the heat stress effect on dairy production, which is not practically identified when studying just the average THI occurrence.
Rights: fechado
Identifier DOI: 
Date Issue: 2008
Appears in Collections:Unicamp - Artigos e Outros Documentos

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