Title: Magnitude and frequency of Heat and Cold Waves in recent decades: the case of South America
Authors: CECCHERINI GUIDORUSSO SIMONEAMEZTOY ARAMENDI IBANROMERO HERNÁNDEZ Claudia PatriciaCARMONA MORENO Cesar
Citation: NATURAL HAZARDS AND EARTH SYSTEM SCIENCES vol. 16 no. 3 p. 821-831
Publisher: COPERNICUS GESELLSCHAFT MBH
Publication Year: 2016
JRC N°: JRC99155
ISSN: 1561-8633
URI: www.nat-hazards-earth-syst-sci.net/16/821/2016/
http://publications.jrc.ec.europa.eu/repository/handle/JRC99155
DOI: 10.5194/nhess-16-821-2016
Type: Articles in periodicals and books
Abstract: In recent decades there has been an increase in magnitude and occurrence of heat waves and a decrease of cold waves, both of which may be related to the anthropogenic influence. This study describes the extreme temperature regime of heat waves and cold waves across South America over recent years (1980–2014). Temperature records come from the Global Surface Summary of the Day (GSOD), a climatological data set produced by the National Climatic Data Center that provides records of daily maximum and minimum temperatures acquired worldwide. The magnitude of heat waves and cold waves for each GSOD station are quantified on an annual basis by means of the Heat Wave Magnitude Index and the ColdWave Magnitude Index. Results indicate an increase in intensity and in frequency of heat waves, especially in the last 10 years. Conversely, no significant changes are detected for cold waves. In addition, the trend of the annual temperature range (i.e. yearly mean of Tmax – yearly mean of Tmin) is positive – up to 1 _C per decade – over the extratropics and and negative – up to 0.5 _C per decade – over the tropics.
JRC Directorate:Sustainable Resources

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