The water in Daming Lake can adjust the coastal climate, because there is water.

The water surface of the lake is large, and there is much water. Because the specific heat capacity of water is larger than that of soil and sand, and the water with the same quality absorbs the same heat as that of soil and sand (ground), the water temperature in the park may play a good role in regulating the urban temperature in midsummer.

So the answer is: specific heat capacity; Temperature.