what factors affects the humidity of an air mass?

Question

a. continents
b. oceans
c. seasons
d. rainfall

Answer 1

All of the above. Air masses over water would absorb a lot more water than over land. Land areas having a lot of rain would have moister air than dryer land. Temperature also affects humidity. The amount of water an air mass can hold goes up with the temperature so that total humidity would go up while relative humidity may go down, so the seasons would definitely affect humidity.

Answer 2

All the four factors affect the humidity.
Continents,being land areas are heated more than the sea surfaces by the solar radiation.If the temperature becomes more,it can contain more moisture which will result in variations in relative humidity.This will be more pronounced in coastal stations where sea-breeze brings lot of moisture inside the land area.
Over oceans,lot of evaporation during day time will add moisture to the air immediately above the water surface, affecting the humidity.
Seasons also affect the humidity.During summer, the temperature over land and sea surfaces increases.As more temperature can hold more moisture,it results in the variation of humidity.During summer,monsoon conditions develop over places like India and lot of moisture is brought from the southern hemisphere oceans resulting heavy rain.So the arrival of monsoon brings about a change from a state of extreme dryness to high humidity and rainfall over India.
Continuos rainfall over a place will wet the air between the cloud and the earth making the relative humidity 100 percent.
Instead of taking a particular air mass, if the whole atmosphere is taken into consideration, the humidity is normally affected by the following factors.
Presence of sea surfaces,rivers, lakes,snow and ice surfaces and vegetation help in supplying water vapour to the atmosphere by evaporation whereas processes in the form of condensation as cloud,fog or precipitation as rain,snow etc remove the moisture from the atmosphere and diminish the stock of water vapour in the atmosphere.Accordingly RH is also affected.
Relative Humidity is found to be more over the poles(as saturation is reached quickly due to low temperature) and very less over deserts(because of no moisture over deserts).

Answer 3

Your proximity to bodies of water ie: oceans have something to do with the humidity of an air mass but dew point is the biggest factor on how humid the air is since when the temperature reaches the dew point that is when the moisture in the air is released until then the moisture is retained in the air mass therefore it is more humid

Answer 4

A. Usually the parts of a continent except for Antarctica (which is all desert) that are close to the equator are usually more humid.

B. Water Vapor rising from the ocean contributes to the water cycle in which causes rainfall and this adds more water vapor to the atmosphere.

C. It's usually most humid in the summertime.

D. The humidity levels has to be close to 100% in order for it to rain.