Precipitation diagnostics of an exceptionally dry event in São Paulo, Brazil
| Autor: | Mári A. F. Firpo, Denis H. F. Cardoso, Caio A. S. Coelho |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Wet season
Atmospheric Science 010504 meteorology & atmospheric sciences business.industry 0208 environmental biotechnology Abnormally early 02 engineering and technology 01 natural sciences Metropolitan area 020801 environmental engineering Geography Public consumption Agriculture Climatology Precipitation business Hydropower 0105 earth and related environmental sciences |
| Zdroj: | Theoretical and Applied Climatology. 125:769-784 |
| ISSN: | 1434-4483 0177-798X |
| Popis: | The State of Sao Paulo in Brazil experienced in 2014 and early 2015 an expressive precipitation deficit, leading to drought conditions with impacts in water availability for public consumption, hydropower generation, and agriculture, particularly during austral summer. This study performs a detailed diagnostics of the observed precipitation during 2014 and early 2015 over a particular region of Sao Paulo State, which includes the massively populated metropolitan region of Sao Paulo. The diagnostic was designed to provide answers to a number of relevant questions for the activities, decisions, and strategic planning of several sectors (e.g., general public, media, and high-level governments). Examples of questions such diagnostics can help answer are: How much precipitation has the region received? Has the region experienced drought conditions in the past? When have similar drought conditions been observed in the past? What has been the observed precipitation pattern in the last years? How severe/rare were the 2014 and 2015 droughts? When does the rainy season typically start/end in the region? What happened during the 2013/2014 and 2014/2015 rainy seasons? The performed diagnostics based on historical 1961/1962–2014/2015 records revealed that the 2013/2014 austral summer was a very rare event classified as exceptionally dry. Similar drought events were previously recorded but with smaller magnitude in terms of precipitation deficits, making the 2013/2014 drought event the driest on the examined record. In fact, the region has been experiencing a precipitation deficit pattern since 1999/2000. One of the contributing factors for the expressive precipitation deficit in 2014 was the abnormally early end of the 2013/2014 rainy season in the region. |
| Databáze: | OpenAIRE |
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