Damon Mcknight
Australia is the driest inhabited continent, with the least fertile soils. The climate of Australia is the second driest of any continent, after Antarctica. The country is affected by the El Niño–Southern Oscillation, which brings about extensive droughts and occasional dust storms and tornadoes. Australia's large size means that the wind patterns do not bring storm systems into the country. The coastal areas of Australia get a lot of rain, but this drains the moisture out of the air so that there is none left for the core of the continent.
| Characteristics | Values |
|---|---|
| Climate of Australia compared to other continents | Second driest of any continent, after Antarctica |
| Average annual rainfall | 419 mm (16 in) |
| Percentage of land receiving less than 600 mm of rainfall annually | 80% |
| Percentage of land receiving less than 300 mm of rainfall annually | 50% |
| Average minimum temperature in coolest months (June and July) | 14 °C (57 °F) |
| Average maximum temperature in hottest months (January and February) | 29 °C (84 °F) |
| Average daily temperature in hottest months | Up to 50 °C (122 °F) |
| Regions with arid or semi-arid climates | Southern coastal parts, desert regions, and the Australian Capital Territory |
| Regions with Mediterranean climate | Southern coastal parts |
| Average annual rainfall in regions with the highest rainfall | 1,200 mm (47 in) |
| 1,570 mm (62 in) | |
| Average annual rainfall in regions with the lowest rainfall | Less than 150 mm (6 in) |
| Months with the most rainfall | December to March (Southern Hemisphere summer) |
| Months with the least rainfall | May to September |
| Factors contributing to dryness | Subtropical high-pressure belt, lack of significant mountain ranges, wind patterns, high-pressure systems, and trade winds |
Explore related products
What You'll Learn
Australia is the second driest continent
The dryness of Australia is governed primarily by the subtropical high-pressure belt, which brings dry air down from the upper atmosphere. This high-pressure belt is usually located south of Australia during the summer and over the north during the winter. Consequently, Australia generally experiences dry summers in the south and dry winters in the north.
The Intertropical Convergence Zone also influences the climate by moving south during the Australian summer, bringing the Australian monsoon to parts of northern Australia. The climate is variable, with extensive droughts and considerable wet periods. The El Niño–Southern Oscillation also affects Australia, occasionally causing dust storms, tornadoes, tropical cyclones, heat waves, bushfires, and frosts.
The coastal areas of Australia receive a significant amount of rain, but this often does not reach the interior of the continent due to its size. The lack of significant mountain ranges also contributes to the dryness, as there is no geography to force moisture-laden air upwards, preventing the formation of river systems.
Australia's large size and specific location also play a role in its dryness. The country is skirted by the Trade Winds to the north and the Westerlies to the south, which bring rain to the margins but rarely penetrate the interior due to high-pressure dominance. The Westerlies, being winds that circle Antarctica, are very cold and have low evaporation rates, further contributing to the dryness.
Australia's Tropical Rainforest: How Much Do They Cover?
You may want to see also
Explore related products
The country experiences extensive droughts
Australia is the driest inhabited continent, with the least fertile soils. The country has a very low annual average rainfall of 419 mm (16 in). 80% of the land receives less than 600 mm (24 in) of rainfall annually and 50% receives less than 300 mm (12 in). The majority of the state has arid and semi-arid climates. The southern coastal parts of the state have a Mediterranean climate with mild wet winters and hot dry summers. The highest rainfall occurs along the southern coasts and the Mount Lofty Ranges, with an average annual rainfall of 1,200 millimetres (47 in) in the vicinity of Mount Lofty. The lowest rainfall occurs in the Lake Eyre basin, with average annual totals of less than 150 millimetres (6 in) and possibly even 100 millimetres (4 in).
There are several reasons for Australia's dryness and extensive droughts. Firstly, the size of the country means that coastal areas, which receive a lot of rain, drain the moisture out of the air, leaving the core of the continent dry. Secondly, the lack of significant mountain ranges means there is no geography to force moisture-laden air upwards, preventing river systems from forming. Thirdly, the wind patterns, including the Trade Winds to the north and the Westerlies to the south, bring rain to the northern and southern margins, but high-pressure dominance prevents them from moving into the interior. The Westerlies, as winds circling Antarctica, are very cold and have low evaporation rates, bringing dry air to the interior.
Upcoming India vs Australia T20 Match
You may want to see also
Explore related products
The southern coastal parts have a Mediterranean climate
Australia is the second driest continent in the world, after Antarctica. The country's climate is variable, with extensive droughts and considerable wet periods. The climate is largely governed by the subtropical high-pressure belt, which brings dry air from the upper atmosphere down onto the continent. This high-pressure belt is typically to the south of Australia in the summer and over the north in the winter, resulting in dry summers in the south and dry winters in the north.
However, the southern coastal parts of Australia have a Mediterranean climate, with mild wet winters and hot dry summers. These areas experience the highest rainfall in the country, with an average annual rainfall of 1,200 millimetres in certain regions. The southern coasts have a mean temperature range of 29 °C (84 °F) in January and 15 °C (59 °F) in July. The rest of the country, including the desert centre, is arid or semi-arid, with little rainfall during the hottest months from October to March.
The dryness of Australia's interior is attributed to its position on the leeward side of mountain ranges, such as the Brindabella Ranges, which prevent the formation of river systems. The lack of significant mountain ranges means there is no geography to force moisture-laden air upwards, resulting in the drainage of moisture from the core of the continent. Additionally, the wind patterns of the Trade Winds and Westerlies bring rain to the northern and southern margins, but high-pressure dominance prevents these weather systems from moving further into the interior.
Climate change is a highly contentious political issue in Australia, with temperatures rising by approximately 0.7 °C between 1910 and 2004. The long-term decline in surface water inflows has resulted in cities like Perth and Adelaide relying on desalination and groundwater to meet urban water demands.
Blake Shelton's Australian Tour: Is It Happening?
You may want to see also
Explore related products
The country's wind patterns don't bring storms
Australia is the second driest continent in the world, after Antarctica. The country's climate is significantly influenced by its unique wind patterns and atmospheric pressure systems, which contribute to its overall aridity.
The country's wind patterns, dominated by the Trade Winds in the north and the Westerlies in the south, play a crucial role in shaping Australia's climate. These winds bring rainfall to the northern and southern margins, but they struggle to penetrate the interior regions due to the high-pressure systems that dominate much of the continent. This high-pressure dominance, related to circulation cells, acts as a barrier, preventing the moisture-laden winds from moving further inland and resulting in dry conditions across the country.
The subtropical high-pressure belt, also known as the subtropical ridge, is another critical factor influencing Australia's dryness. This weather system brings dry air down from the upper atmosphere onto the continent. The position of this high-pressure belt varies seasonally, leading to dry summers in the south and dry winters in the north. Consequently, the majority of Australia experiences arid or semi-arid climates, with the southern coastal regions being the notable exception, benefiting from a Mediterranean climate.
The absence of significant mountain ranges in Australia further contributes to its dryness. Unlike regions with substantial mountain ranges, such as North and South America, Australia lacks the geographical features necessary to force moisture-laden air upwards, preventing the formation of glaciers and extensive river systems. Instead, the country is characterized by vast desert regions, including the Great Australian Desert, which covers approximately 40% of the continent with semi-arid grasslands, shrublands, and red sand dunes.
While Australia is known for its dry conditions, it is important to acknowledge the variability of its climate. The country experiences occasional wet periods, tropical cyclones, and monsoon rains during its wet season, typically from December to March. However, these wet periods are interspersed with frequent droughts, heatwaves, and bushfires, highlighting the dynamic and often extreme nature of Australia's climate.
Australian Shepherds: Ideal Livestock Guardians?
You may want to see also
Explore related products
Rain drains moisture from the air
Australia is the second driest continent on Earth, after Antarctica. The country's climate is variable, with extensive droughts and considerable wet periods. The coastal areas of Australia receive a lot of rain, but this rain drains the moisture from the air, leaving the core of the continent dry.
The amount of water vapour in the air depends on factors such as temperature, pressure, and particulate matter. Warm air can hold more moisture than cold air. When the temperature drops, the relative humidity increases until it reaches 100%, known as the dew point, at which point the air is saturated and water vapour condenses into water droplets, forming fog or clouds.
In mountainous areas, heavy precipitation occurs when moist air is forced upwards and condenses along the sides of mountains. On the leeward side, downslope flow causes the air mass to heat up and dry out, creating a rain shadow and often a desert climate. Australia's lack of significant mountain ranges contributes to its dryness as there is no geography to force moisture-laden air upwards, preventing the formation of rivers and other water systems.
The Australian climate is influenced by the subtropical high-pressure belt, which brings dry air down onto the continent. This results in dry summers in the south and dry winters in the north. The Intertropical Convergence Zone brings monsoon rains to northern Australia during the wet season, which typically occurs during the Southern Hemisphere summer.
Find a PhD in Australia: A Guide
You may want to see also
Frequently asked questions
Yes, Australia is the driest inhabited continent, with the least fertile soils. 80% of the land receives less than 600 mm (24 in) of rainfall annually and 50% of the land receives less than 300 mm (12 in).
There are several reasons why Australia is so dry. Firstly, the size of the country means that coastal areas get a lot of rain, but this drains the moisture from the air before it reaches the centre of the country. Secondly, Australia does not have any significant mountain ranges, so there is no geography to force moisture-laden air upwards to form rivers or glaciers. Thirdly, the wind patterns in Australia do not bring storm systems into the country. Trade Winds to the north and Westerlies to the south bring rain to the margins, but high-pressure dominance over much of Australia keeps them from moving into the interior.
Australia's dry climate has several implications, including frequent droughts, bushfires, and dust storms. Climate change is also a highly contentious political issue in Australia, with temperatures rising by approximately 0.7 °C between 1910 and 2004. This has led to water shortages in cities such as Perth and Adelaide, which rely on desalination and groundwater to meet urban water demand.
