Why relative humidity is more near sea?

The air in contact with the ocean surface is saturated and it is the gradient in the concentration of water vapor between this surface air and the air near the surface that drives evaporation.

Why relative humidity is high in the equator?

Heat is needed to evaporate water, changing it into vapor in the air. Also, because warm air can hold more moisture than cool air, locations with warm climates, such as those near the equator, generally have higher humidity than locations with cooler climates, such as those near the poles.

Where is relative humidity the highest?

In general, assuming the dewpoint or absolute humidity does not change, the relative humidity will be highest in the early morning when the air temperature is coolest, and lowest in the afternoon when the air temperature is highest.

Is relative humidity higher in summer or winter?

Relative humidity, a percent of saturation, is temperature dependent. Since cold air holds substantially less moisture than warm air, it is easier to saturate a parcel of cold air. Consequently, relative humidity is actually higher in winter than in summer (76\% vs. 66\%, according to climatology).

What is relative humidity What does it indicate?

Relative humidity is a percentage that represents the amount of water vapor in the air at a given temperature compared to the max possible water vapor amount at that same temperature. For instance, relative humidity of 25 percent means that air is at a quarter of its possible water vapor capacity.

How do temperature and humidity change over land and the ocean?

While changes in temperature and humidity have been different over land and ocean, these changes have combined to give equal changes in the moist static energy of the air over land and ocean, consistent with expectations from atmospheric dynamics.

What is the relationship between relative humidity and temperature?

With the change of air temperature, the capacity to retain moisture increases or decreases and the relative humidity is also affected. Relative humidity is greater over the oceans and least over the continents (absolute humidity is greater over oceans because of greater availability of water for evaporation).

Why is the rate of evaporation greater over oceans than continents?

Generally, actual evaporation is greater over oceans than over continents. This is simply because of the unlimited supply of water at the ocean surface compared to the limited supply over land. However, equatorial regions are an exception to this general rule.

Why does the land lapse rate change with ocean temperature change?

This is because the air above the ocean is, at any moment in time, typically holding more water vapour than the air over land. These contrasting lapse rate changes explain the warming contrast: a weaker decrease in land lapse rate implies a larger increase in land surface temperature relative to the ocean.