Affiliation(s)
1. Guinea Weather Service (DNM), Conakry, BP 566, Guinea
2. Laboratoire de l’Atmosphère et des Cyclones, Université de La Réunion, UMR 8105, CNRS, La Réunion, France
3. School of Chemistry and Physics, University of KwaZulu-Natal, Westville, Durban, South Africa
4. Scientific Research Center of Conakry Rogbane (CERESCOR), Conakry, BP 1615, Guinea
5. Laboratoire de Physique du Plasma, Université Pierre et Marie Curie, UMR 7648, Paris, France
6. International Center for Theoretical Physics (CTP), Strada Costiera 11, I-34151 Trieste, Italy
ABSTRACT
N’zerekore is a geographical region of Guinea, which houses a weather observatory located at
longitude 8.8°, latitude 7.7° and altitude 475 m. This region is of
major socio-economic interest for
the country. The climatological study of this region
shows the variability of each parameter. The objective of this study was to analyze
meteorological parameters trends and to assess the space-time evolution of some
agro-climatic risks related to the main trends observed in the meteorological
parameters regime of this region. In this study, programming tools were used for processing and
analyzing meteorological parameters data, including temperatures, rains, wind, evaporation and storms measured in
this observatory from 1931 to 2014. The interannual, annual and daily variations of these parameters were obtained, as well as temperature, precipitation
anomalies and agroclimatic indexes trends. The analyzing of these variations
explained that September is the rainiest months, and the year 1932, 1957 and 1970 are normal, rainy
and dry year, respectively. The evaporation increased since 1971 from
January to March and November to December. A positive temperature anomaly was observed since 1973 with the maximum 26-33 °C and the minimum 16-21 °C. A dominant westerly
wind with a speed of 2.6 m/s was determined.
Agro-climatic parameters in
N’zerekore have high variability. From 1931 to 2014, three major periods can be
distinguished: a wet period from 1931 to 1977, a dry period from 1978 to 1994
and rainfall variability from 1995 to 2014. The trend of these parameters
explains the impact of climate change in this part of the world. This is
exacerbated by human activity (deforestation), thus mitigation measures are
necessary. It would be useful to
extend this study throughout the country.
KEYWORDS
Climate change, N’zerekore, agroclimatic index.
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