IMPACTS OF MARINE CLOUD BRIGHTENING ON MAJOR METROPOLISES IN THE ARID ARAB REGION
Abstract
Climatic extreme events will occur more frequently, which will seriously threaten the life safety of residents in arid and semi-arid areas. Cairo, Algiers and Dubai are located at the crossroads of the global climate pattern. Climatic extreme events will seriously threaten the lives of local residents. Therefore, it is of great value to study the impact of the Marine Cloud Brightening (MCB) scheme on these metropolises. Based on the HadGEM2-ES model simulations of the MCB scheme, we used six climatic extreme indices, the hottest days (TXx), the coolest nights (TNn), the warm spell duration (WSDI), the cold spell duration (CSDI), the consecutive dry days (CDD) and wettest consecutive five days (RX5day), to analyze the impact of MCB schemes on the extreme climate in Cairo, Algiers and Dubai in this study. Compared with an RCP4.5 scenario, the implementation of the MCB scheme from 2030 to 2059 would increase the mean annual RX5day index in Cairo by 1.98mm, decrease the average annual WSDI index in Algiers by 26 days and decrease the average annual WSDI index in Dubai by 70 days. The implementation of the MCB scheme is of great significance to mitigate climatic extreme events in Cairo, Algiers and Dubai.
