Sea breeze change and heat-related risk in urban environment under global warming

Sea breeze plays an important role in the local climate of coastal areas. Sea breeze develops during the daytime caused by the temperature contrast between land and sea areas, which varies across climate zones and is geographically dependent. For coastal cities, sea breezes work as natural ventilation cooling down a city with cold air from the sea. Knowing that about 40% of the worlds population lives within 100 kilometres of the coast the change of sea breeze in the context of future global warming will have a high socio-economic impact. Here, using a climate dynamical downscaling approach with a fine-resolution regional climate model, we investigate the response of sea breeze to the global warming effect in two large cities, Tokyo and Singapore, until the end of the 21st century. Changes in sea breeze characteristics, i.e., its development timing, depth of inland penetration, magnitude is detected in reference to the associated changes in diurnal temperature variation, planetary boundary layer dynamics.