Australia Rains

Australia Rains

It has already been said that the salient feature of the Australian climate is its drought. The annual rainfall map shows that the only moderately rainy regions of the continent are the northern coasts and an eastern and south-eastern strip. The wettest area is the steep slope of the Atherton Plateau, where Harvey Creek averages 4180mm. of rain per year. On the west coast of Tasmania there is a rainfall of 2000-2500 mm. On the other hand, nowhere is there an annual precipitation less than 100 mm: the minimum value is found at Kanowana Station, with 106 mm., And at Oodnadatta, with 119 mm., Near Lake Eyre. A very dry area, just 200 mm., Also extends from Broken Hill to Carnarvon on the west coast. The rainy seasons are related to the movements of the pressure zones and winds. In the summer, the tropical wetland brings abundant rain to the north coast and light rains to the north-central regions. In winter, Antarctic cyclones bring moderate rainfall to the south coast but do not penetrate much inland, except in the south-east. The eastern highlands produce a lot of local rain due to the cooling of humid winds deflected upward from the mountain. There are therefore four types of precipitation: internal, except in the south-east. The eastern highlands produce a lot of local rain due to the cooling of humid winds deflected upward from the mountain. There are therefore four types of precipitation: internal, except in the south-east. The eastern highlands produce a lot of local rain due to the cooling of humid winds deflected upward from the mountain. There are therefore four types of precipitation: a) the summer rains of the northern coast; b) the winter rains of the southern coast; c) the arid or central region, which includes the low rainfall of the west coast; d) the almost uniform annual rainfall of the eastern belt. The latter region has a well-marked summer high in the north, an autumn high in Sydney and a winter high in the south. Since the main heritage of Australia is in its humid temperate regions, where it is the key to the problem of future colonization, an overview of the temperate regions, which are more than 500 mm long, may be useful. average annual rainfall. For Australia 2003, please check computerannals.com.

Australia will always be a largely pastoral country. Now, in this regard, the total quantity of precipitation is not so important as the degree of its probability: a factor which is less easy to calculate and which has led to very different assessments on the value of Australia’s unoccupied land. This will be best illustrated by the rainfall data over the next two years. In 1904 in Barrow Creek (Northern Territory) 1010 mm fell. of rain, in 1905 only 101 mm.; in Wiluna (Western Australia) in 1900 the precipitation was 711 mm., in 1901 only 203 mm.; in Charlotte Waters (South Australia:) fell in 1908 304 mm. of rain, and less than 71 mm. the following year. The Taylor (Australian Meteorology) has constructed maps on the probability of rains, which show that the region between Onslow, Burketown and Windorah has the most unsafe rainfall, while the southern coast is the region with the least uncertain rainfall. Evaporation is very strong in the central arid region: in Boulia (Queensland) it reaches 3170 mm. per year and this value is probably maintained up to Marble Bar. The axis of the area of ​​greatest evaporation is therefore 450 km. north of the axis of the least rainfall, and this is the fact that determines the location of the deserts: in fact, while the southern border of the desert region is given approximately by the line of 200-220 mm. of rain, to the north, due to the intense evaporation, the margin is constituted approximately by the 380 mm line.

Only in south-eastern Australia does snow fall in inhabited districts. So in May 1915 about 15 cm. of snow fell in central Tasmania. The snows cover the peaks of the Australian Alps for most of the year, but generally melt completely in March or April; the same happens in the mountains of Tasmania. Snow has rarely occurred in inhabited areas of southern Queensland and New South Wales (Toowoomba at 600m, Bathurst, etc.); occasionally it falls on the Flinders Mountains and in the district of Albany (Western Australia).

Australia Rains

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