3/7/2023 0 Comments Land breeze![]() ![]() Over the water, high surface pressure will form because of the colder air. The warm air over the land will rise throughout the day, causing low pressure at the surface. However, water heats up much more slowly than land and so the air above the land will be warmer compared to the air over the ocean. The land absorbs much of the sun’s energy as well. Water is a good absorber of the energy from the sun. This breeze occurs most often in the spring and summer months because of the greater temperature differences between the ocean and nearby land, particularly in the afternoon when the land is at maximum heating from the sun.ĭuring the day, the sun heats up both the ocean surface and the land. I should already be familiar with: Temperature Gradient, Convergence and DivergenceĪ sea breeze describes a wind that blows from the ocean inland towards land. The fronts caused by the sea breezes along the coast can provide a trigger to daily thunderstorm activity in coastal areas, particularly along the peninsula of Florida. Why do I care? During the summer, the sea breezes are stronger than in winter because of the large temperature differences between land and ocean water that time of year. ![]() Through a combination of various factors, the mechanism of action of UHI is discussed, in order to provide reference for urban planning and rational layout.Sea and Land Breezes describe the wind that blows onshore from sea to land during the day and blows offshore in the evening. In summary, both LCZ and sea-land winds will have an impact on UHI, and the influencing factors on UHI need to be studied comprehensively. SID-LCZ indicates the station number and the type of LCZ to which it belongs, DIS stands for the distance between the station and the coastline, SWS and LWS represent wind speed of sea and land respectively, DUHII and NUHII respectively represent the intensity of day and night heat island. Meanwhile, for the same type of LCZ, stations farther from the coastline had lower land breeze wind speeds and a lower overall decrease in the UHII. However, the land breeze wind speed and UHII were relatively positively correlated, i.e., the land breeze wind speed increased as the UHII increased. ![]() Meanwhile, for the same LCZ type, areas farther from the coastline have lower sea breeze wind speeds and greater UHII values. We found that regardless of the type of LCZ at the meteorological station, the overall trends in the sea breeze wind speed and UHII values were inversely proportional, i.e., the greater the sea breeze wind speed, the smaller the UHII. Therefore, we comprehensively considered the effects of LCZ and sea-land winds on the day and night UHI, and analyzed the differences of the effect on different gradients. NUHII is the nighttime UHII and DUHII is the daytime UHII. The results showed that the sea wind could weaken the UHI effect, and the land wind could enhance the UHI effect. Meanwhile, based on the sea-land wind speed calculated from the meteorological stations data, the correlation between day and night UHII and the sea-land wind speed was discussed. When discussing the effects of local climate zones (LCZ) and sea-land winds on UHI, we found that the day and night UHI intensity (UHII) corresponding to the LCZs of the building type is larger than that of the natural type LCZs. Therefore, a comprehensive study of multiple influencing factors is necessary. However, in the research on the influencing factors of UHI, most of them are based on the role of a single factor such as land use type, climate, urban ventilation, etc., but there is a lack of research that combines multiple factors to explore the mechanism of UHI. The UHI effect refers to a phenomenon that the urban temperature is higher than the rural temperature, which has received extensive attention from Chinese and foreign scholars in recent years. In the process of global rapid urbanization, the population has surged, and the urban impervious surface area has increased, followed by the frequent occurrence of urban heat island (UHI) effect, extreme climate, high temperature and heat waves, which seriously affect human comfort and threaten human health. ![]()
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