Air does not remain in a given place. A country does not have an 'airmass'.
The word airmass is a singular noun. The plural is airmasses.
it become a storm
The warmer airmass that was coming would mark a positive change in the weather.
An airmass that is very warm and dry would be very light and have a tendency to rise up.
cairo Egypt is the government of egypt
People in Cairo live in shack type houses with flat rooftops.
dictatorship
Cairo has been a municipal (like a city) government since 1950.
Compared to a maritime tropical airmass, a maritime polar airmass has lower temperature and less water vapor.
An occluded front is when a warm air mass is caught between two cooler air masses.1. Cold occluson : If the airmass of the advancing cold front is colder than the cool airmass of the warm front, the advancing cold front undercuts and lifts both the warm and cool airmass of the warm front. The weather is initially warm front type but during the passage of front, showery weather of cold front occurs. This occlusion is comon in summers. 2. Warm occlusion : When the airmass behind the advancing cold front is less colder (cool) than the cold airmass of the warm front ahead, the advancing cold front overrides the warm front aheaad. The weather in such a case is similar to that of warm front. This type of occlusion occurs in winters and is less common.
It is cold and dry.