The southern hemisphere of the Earth becomes drier weather and climate
Scientists from the CSIRO undertook a study of issues relating to reducing autumn precipitation in the south-eastern Australia. Researchers found a trend in the 1970s of the last century. It is noteworthy that in April and May also reduced the amount of rainfall, which is associated with the approach of the dry subtropics called Hadley cell to the south-east Australia.
In addition, both the autumn and the spring rainfall influenced the shift track storms and other weather systems in the more southern regions of the continent in the late 20th century. Great importance has also had devastating "superzasuha" 1997-2009,. Hadley cell is close to the south of Australia at 200-400 km at different points, which caused a lack of precipitation in the mid-and late autumn and spring.
Except the south-west of Australia from similar problems, but to a lesser extent, affected South Africa and the South Indian Ocean. There is lack of autumn rains and in the southern part of Chile. As shown by simulations, nearly 85% of the precipitation, which should fall in these locations, and migrate in the fall, which is located 400 km north.
For south-eastern Australia autumn is a crucial period, as it was during this period the soil gets the right amount of moisture, wet autumn and winter as directly linked to the quality of future crops.