Conclusion

Research 1 - Landcover type

Urban has a strong u-wind near the surface, and its relative humidity tends to increase over time.

Based on the temperature that has the greatest effect on the urban heat island effect, mixed forest and water bodies had relatively low temperatures. And mixed forest was predicted to be suitable for mitigating the urban heat island effect because of the lower relative humidity.

Research 2 - Location

Waterbodies have the strongest u-wind and w-wind. However, the relative humidity is relatively high and there is a large temperature difference between the Urban area and the waterbodies area. According to the definition of the urban heat island effect, it can be intuitively judged by temperature because it is measured by temperature. In addition, waterbodies are not suitable for mitigating the urban heat island effect because there are studies showing that low relative humidity relatively moderates thermal stress([2]).

In addition, when comparing mixed forest and cropland, it was confirmed that cropland had a lower relative humidity but a higher temperature. The forest has a relatively lower temperature than cropland because it has the cooling effect of evapotranspiration, a low albedo, and a high surface roughness ([1]).

Therefore, the mixed forest is the most effective in mitigating the urban heat island effect.

Research 3 - Distribution

In Urban areas, higher temperatures and lower relative humidity mean that, where the Urban center has a larger proportion of non-urban areas, it shows lower temperatures and higher humidity than the non-urban center. The u-wind results varied depending on land use, while the w-wind strength was generally higher at the Urban center.

Based on the conclusions drawn in Research 2, we can see that in the case of mixed forest, the Urban center also has lower temperatures and higher humidity. The x-wind strength is similar between the Urban and mixed forest centers, but the z-wind is relatively stronger at the Urban center.

However, as the overlay plot indicates, horizontal wind is dominant, and the temperature decrease rate is faster at the Urban center, suggesting that the Urban center is more effective at mitigating the urban heat island effect.

Mixed Forest

Urban

Mixed Forest

Therefore, the optimal model for mitigating the urban heat island effect in our study is mixed forest-urban-mixed forest.