Minimum and Maximum Temperature Trends in Congo-Brazzaville: 1932-2010
Minimum and Maximum Temperature Trends in Congo-Brazzaville: 1932-2010作者机构：Centre de Recherches et d’études sur l’Environnement (CR2E) Université Marien Ngouabi Brazzaville République du Congo
出 版 物：《Atmospheric and Climate Sciences》 (大气和气候科学（英文）)
年 卷 期：2014年第4卷第3期
页 面：404-430页
学科分类：07[理学] 070601[理学-气象学] 0706[理学-大气科学]
主 题：Congo Republic Temperatures Maximum and Minimum Temperature Trends
摘 要：Maximum and minimum temperatures time series of Congo-Brazzaville are analyzed for trend and discontinuities over the period 1932 to 2010. Temperatures series show an irregular increase. A total of 8 synoptic stations show positive trends in their annual mean maximum temperature series, and 7 of them are significant, with higher trends for urban stations. Annual mean minimum temperature showed 6 stations having positive trends. This increase is in relation with observations at regional scale. However, the differences are observed between large towns (Brazzaville and Pointe-Noire), and small or rural towns (Dolisie, Sibiti, Impfondo, Djambala). Trends in diurnal temperature range (DTR) are large positive trends in maximum temperature that are mainly observed in cities. The curve of DTR shows a decreasing trend which indicates the increasing of minimum temperatures. The effects of urbanization on temperature trends are investigated. Most stations regarded as urban stations are still useful for trend analysis;being situated on the suburban of the studied cities, they are therefore, not substantially influenced by the urban heat island.
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