Climatological aspects and changes in temperature and precipitation extremes in Viçosa-Minas Gerais
| Autor: | ALVARO AVILA-DIAZ, FLÁVIO JUSTINO, DOUGLAS S. LINDEMANN, JACKSON M. RODRIGUES, GABRIELA REGINA FERREIRA |
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| Rok vydání: | 2018 |
| Předmět: |
Extreme climate
010504 meteorology & atmospheric sciences Science 0207 environmental engineering Climate change 02 engineering and technology 01 natural sciences Extreme temperature Population growth Precipitation Cities extreme climate indices 020701 environmental engineering 0105 earth and related environmental sciences Multidisciplinary Temperature Climatic variables Urban expansion Trend analysis climate change Homogeneity Environmental science Physical geography Seasons trend analysis Brazil |
| Zdroj: | Anais da Academia Brasileira de Ciências, Vol 92, Iss 2 (2020) Anais da Academia Brasileira de Ciências v.92 n.2 2020 Anais da Academia Brasileira de Ciências Academia Brasileira de Ciências (ABC) instacron:ABC Anais da Academia Brasileira de Ciências, Volume: 92, Issue: 2, Article number: e20190388, Published: 06 JUL 2020 |
| ISSN: | 1678-2690 |
| Popis: | Extreme climatic events and their hazards have strong impact on society. Urban areas in Brazil are especially vulnerable to the impact of such events due to their rapid growth and inappropriate infrastructure. Viçosa is a mid-sized city in Southeastern Brazil that has been experiencing issues associated with urban expansion and population growth since the 1960s. Thus, this study aims to identify patterns of extreme climate events in Viçosa based on daily temperature and precipitation time series (1968-2017). Homogeneity tests were carried out in order to identify breaking points in these climate variables. Climate trends were analyzed through Mann-Kendall test and their magnitude was checked based on Sen’s slope. Results have evidenced statistically significant and increasing trends in annual minimum temperature since the 1990s. Moreover, statistically significant breaking points in extreme temperature indices have shown increasing number of warm days, and decreasing number of cold nights, in both annual and seasonal analyses. Extreme climatic events have been observed more often in recent years, mainly in the number of consecutive dry days and maximum and heavy precipitation days. Based on results, Viçosa experiences warmer conditions throughout the year, whereas more (less) torrential rainfall events have been occurring during Summer (Winter). |
| Databáze: | OpenAIRE |
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