Why are Coastal areas more humid than inland areas & climate of a coastal region compare with that of a non coastal region on the basis of rate of evaporation?
The winds blowing from sea to land bring a lot of moisture with them. They make the climate in the coastal areas very humid. Rate of evaporation is inversely proportional to humidity. In non-coastal areas humidity is less compared to coastal areas, and hence rate of evaporation of water is more in a non-coastal area compared to coastal area. The humidity in coastal areas is usually more than that of inland areas. Climates in coastal areas are moderated by the ocean. Because water does not heat up as easily as land does, oceans can help keep coastal areas cooler during the summer when inland temperatures soar. The sea has a moderating influence on the region close to it. Compared to land, water takes longer to heat and cool. Thus, oceans heat up and cool down slower than the land around them. Cool sea breeze keeps the coastal areas cooler in summer and warmer in winter than places far away from the sea. The specific heat capacity of water is very high. It is about five times that of sand. Hence, temperature change is much less in water than that of land.
Humidity affects the climate of a place. The winds blowing from sea to land bring a lot of moisture with them. They make the climate in the coastal areas very humid. Rate of evaporation is inversely proportional to humidity. In non-coastal areas humidity is less compared to coastal areas, and hence rate of evaporation of water is more in a non-coastal area compared to coastal area. The rate of evaporation in a coastal area is less because of high humidity. High humidity represents higher concentration of water vapour in the air due to which temperature of the surrounding atmosphere decreases and the rate of evaporation also decreases. Coastal areas experience less contrasts in temperature conditions due to moderating effect of the seas. The large water bodies helps in moderating temperature. Water has a higher heat capacity than soil and rock, so the ocean takes much longer to heat and to cool than the land. The more humid the air, the closer the air is to saturation, and less evaporation can occur. Also, warm air can "hold" a higher concentration of water vapor, so you can think of there being more room for more water vapor to be stored in warmer air than in colder air. A substance that has a larger surface area will evaporate faster, as there are more surface molecules per unit of volume that are potentially able to escape. the higher the temperature of the substance the greater the kinetic energy of the molecules at its surface and therefore the faster the rate of their evaporation. On a global scale, the amount of water evaporating is about the same as the amount of water delivered to the Earth as precipitation. This does vary geographically, though. Evaporation is more prevalent over the oceans than precipitation, while over the land, precipitation routinely exceeds evaporation. Since the proportion of moisture in the atmosphere depends on temperature and the air near the coastal areas has fewer variations in terms of temperature the higher temperatures hold a greater amount of moisture and make the climate of coastal regions humid. Water has a higher heat capacity than soil and rock, so the ocean takes much longer to heat and to cool than the land. Coastal areas will generally have more moderate temperatures than inland areas because of the heat capacity of the ocean. As such, sand gets heated or cooled more rapidly as compared to water under the similar conditions. Thus a large difference in temperature is developed between the land and the sea due to which land and sea breezes are formed. These breezes make the climate near the sea shore moderate.
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