Daily temperature extremes over Egypt: Spatial patterns, temporal trends, and driving forces

摘要: Spatial and temporal changes of daily temperature extremes are investigated over Egypt using a standard set 23 indices. Our analysis uses database consisting complete, high quality homogenous maximum minimum air records at 40 stations, spanning the period from 1983 to 2015. The trends were assessed least squares regression model, its significance was determined by means modified Mann-Kendall test (p < .05). Results demonstrate that frequency, intensity, persistence warm increased significantly study period, with clear spatial gradient southeast northwest. strongest warming more evident in coastal areas along Red Sea Sinai Peninsula. In contrast, cold mostly non-significant, divergence (i.e. positive negative). Changes variability indices such as diurnal range (DTR) consistent those than extremes. results also witnessed stronger temperature, leading dramatic increase DTR, especially last decade. This points possible physical mechanisms responsible for detectable sea level pressure geopotential field data. indicate anomalous events directly related easterly winds bring dry Arabian Peninsula Iranian Plateau, accompanied strong ridges eastern Mediterranean an intensification Asian monsoon lows. On other hand, occurrence can be linked east-west between North Atlantic Highs Siberian Persian Troughs, which enhances northerly northwesterly advection Northern Europe Egypt. situation is combined subsidence cooler mid low troposphere. Overall, observed could have profound ecological, hydrological socioeconomic impacts, crop production, water resources management energy consumption. As such, improving insight understanding considerable importance provide guidance policymakers stakeholders develop appropriate adaptation strategies.