Climate change in Algeria and its impact on durum wheat

摘要: According to IPCC reports, the Mediterranean basin and particularly North African area are amongst most vulnerable regions climate change. However, information concerning zone is very limited, studies on change have never been conducted in Algeria up now. This paper aims at bridging this gap initiates a first research impact of durum wheat cropping, strategic commodity food system national economy Algeria. Climate projections for distant future (2071–2100), obtained from ARPEGE-Climate model Meteo-France run under medium A1B SRES scenario, introduced into simple agrometeorological crop previously validated with field data. Two options sowing date assessed: dynamical date, chosen within traditional window by means rainfall criterion, or prescribed supplemental irrigation same day. Crop development modelled using thermal time, maximum yield determined accumulation solar radiation. A water stress index inferred daily balance model, actual estimated potential corrected index. The also takes account occurrence dry periods during growing season, which can induce partial total failure cycle. stations, representative two three agroclimatic areas where grown, were chosen: Algiers central northern region Bordj Bou Arreridj eastern high plains. not similar both areas, but tendency towards aridity clear especially spring. Future temperature evapotranspiration increase spring summer. In Algiers, will decrease throughout year mainly Conversely, summer precipitation significantly. regions, autumn rains climate, possibilities early be improved, cycle reduced, harvest take place earlier. yields tend whereas Arreridj, (earlier) keep their current level.