28 janvier 2020
HALSHS : archive ouverte en Sciences de l’Homme et de la Société - notices sans texte intégral
http://creativecommons.org/licenses/by-nc-sa/ , info:eu-repo/semantics/OpenAccess
Cheikh Faye et al., « L'ANOMALIE DE LA TEMPÉRATURE MINIMALE ET MAXIMALE DANS LA PARTIE SUD-EST DU SÉNÉGAL », HALSHS : archive ouverte en Sciences de l’Homme et de la Société - notices sans texte intégral, ID : 10670/1.13c1e3...
Senegal is experiencing recent climate change impacts related to hazards such as temperature, rainfall, floods, droughts, drafts, etc. Temperature is one of the climatic variables, besides rainfall, the most influential on the agricultural aspects of the country. This paper investigates the temporal variability of minimum and maximum temperature and anomaly in the southeastern part of Senegal over the period 1987-2016. The methodology is based on the estimation of mean, standard deviation, trends and anomaly of minimum and maximum annual temperature. The results of the analyzes show that in recent times the minimum and maximum annual temperatures are in the upward trend. In the eastern Senegal (Tambacounda and Kedougou) and Casamance (Ziguinchor, Kédougou and Sedhiou) regions, the mean annual maximum temperature has increased sharply relative to the average normal temperature throughout the country. The temperature analysis reveals a slightly different trend over the last three decades. In the study area, on the minimum temperature, there is a positive anomaly at two stations (0.002°C at Ziguinchor and 0.01°C at Kédougou) a negative anomaly at two stations (-0.12°C at Kolda and -0.15°C at Tambacounda). For the maximum temperature, the anomaly is positive at three of the four stations (0.04 °C at Ziguinchor, 0.10°C at Kolda and 0.15°C at Kédougou ; only Tambacounda recorded a negative anomaly with -0.22°C). In general, the temperature has been steadily increasing in recent years in Senegal due to climate change.Keywords: trend, anomaly, minimum temperature, maximum temperature, Senegal