2007-11-27 00:14:15 · 5 answers · asked by meown 1 in Science & Mathematics ➔ Earth Sciences & Geology
The cause of all droughts is not enough rainfall. During a drought, the land can become starved of nourishment. The earth is parched and even if some rain falls it dries up very quickly. There are many causes for this lack of rain. It can be due to natural global patterns of air circulation, like in the Sahara desert where the winds are very strong, where it's naturally very dry and very sunny.
In other parts of the world, droughts can be caused when high pressure weather systems last for several weeks. When there is a high pressure system no clouds will form because no water can evaporate. When a high pressure system is over an area for too long there is no precipitation (snow and rain). High pressure systems bring lots of sunshine, but can stop the passage of low pressure systems that bring rain.
Unfortunately droughts can be created or at least helped along by people too. Poor practices in farming and too many fertilizers can make the soil lose its moisture and richness. Constant use of fossil fuels causes GLOBAL WARMING and EXTREME WEATHER. Droughts are part of extreme weather changes that are happening around the world.
2007-11-27 01:18:24 · answer #1 · answered by dixi 3 · 2⤊ 0⤋
Well you guys are partially right. The fact is there is moisture in the air. The atmosphere above the Sahara desert is full of moisture. So is most all of the warm regions around the globe. The problem is Upper wind currants. If they don't blow cooler air into these regions and cool the warm, moist air down, it doesn't rain. The desert gets freezing at night because at ground level there is little moisture. However, in the upper atmosphere, the air is warm and moist.
2007-11-27 02:43:23 · answer #2 · answered by Jackolantern 7 · 0⤊ 0⤋
No rain due to no moisture in the air.While the winds blow from one place to another they loose their moisture and when they reach their end they give no rain to that place at the end,so that place experiences drought.
2007-11-27 01:30:46 · answer #3 · answered by DK 3 · 0⤊ 0⤋
no rain...what is the cause of no rain?. no moisture in the air . what is the cause of no moisture in the air? good question
2007-11-27 00:26:26 · answer #4 · answered by RD 3 · 1⤊ 0⤋
No rain.
2015-04-21 12:21:23 · answer #5 · answered by Blake 1 · 0⤊ 0⤋