Geographical Processes
There are two main geographical processes that are the reason behind droughts being caused. These are the atmospheric and hydrological pressures, and the El Nino effect.
The atmospheric and hydrological pressure are a result of the geography of Australia. This means that Australia has changeable rainfall patterns due to the high pressure systems that we often experience. The power of high pressure systems along with the lack of moisture in the air, is one of the big reasons Australia is prone to drought.The El Nino effect is a major air pressure shift between the Asian and East Pacific regions and it is the most influential geographical process. This major shift affects weather patterns around the Pacific oceans. This effect can cause extreme drought conditions in Australia, such as the droughts in 1997 and in 2002-2007.
The atmospheric and hydrological pressure are a result of the geography of Australia. This means that Australia has changeable rainfall patterns due to the high pressure systems that we often experience. The power of high pressure systems along with the lack of moisture in the air, is one of the big reasons Australia is prone to drought.The El Nino effect is a major air pressure shift between the Asian and East Pacific regions and it is the most influential geographical process. This major shift affects weather patterns around the Pacific oceans. This effect can cause extreme drought conditions in Australia, such as the droughts in 1997 and in 2002-2007.