the warm moist air mass over the andes mountains in argentina comes from the east.
where does the warm moist air mass over the andes mountains in argentina come from?
from the east
each air mass type brings in different temperature and moisture properties. the continental polar air mass brings in cold and dry air from central canada, traveling south across the region. the continental tropical air mass comes in from the gulf of mexico and the caribbean, bringing in hot and dry air while moving north. the maritime tropical air mass comes from the southwest united states and northern mexico, and it tends to bring in warm and moist air, but sometimes the air that comes in is dry. the last air mass that affects this ecoregion is the maritime polar air mass. it comes in from the pacific ocean and moves east over the mountain regions. it brings in cool moist air that changes to warm dry air after moving over the mountains. these air masses cause the seasons to be very extreme and drastic. the winter time brings harsh and varied weather. the midsummer months bring in warm moist and dry air, depending on the area within the region and what air masses affect those areas.
great plains ecoregion
the dry line is the boundary between dry and moist air masses east of mountain ranges with similar orientation to the rockies, depicted at the leading edge of the dew point, or moisture, gradient. near the surface, warm moist air that is denser than warmer, dryer air wedges under the drier air in a manner similar to that of a cold front wedging under warmer air. when the warm moist air wedged under the drier mass heats up, it becomes less dense and rises and sometimes forms thunderstorms. at higher altitudes, the warm moist air is less dense than the cooler, drier air and the boundary slope reverses. in the vicinity of the reversal aloft, severe weather is possible, especially when a triple point is formed with a cold front.
surface weather analysis