||Federation and Meteorology
Table of Contents
Meteorological Work in Australia
Meteorological Work in Australia: A Review
Map No. 1February 18th, 1890
Map No.2January 14th, 1891
Map No.3March 12th, 1891
Map No. 4, February 5th. 1890, and Map No .5, May 27th, 1893
Map No. 6, June 22nd, 1893
Map No. 7, July 14th, 1893
Map No. 7, July 14th, 1893 (continued)
As the summer advances the high pressure belt retreats, and usually lies a little to the south of the coast, with its maximum pressure about latitude 37° to 40°, and the whole of the interior of Australia is then well within the equatorial belt of low pressure.
On the north coast, and for some distance inland, the winds are north-west, monsoonal rains setting in at the end of October and lasting till the end of March or April, the heaviest rain being in December, January, and February, in which months the average at Port Darwin is 10.420, 14.782, and 13.009 inches, respectively.
The southerly reach of the north-west monsoon depends on the pressure in the interior, which is frequently very uniform. but when a barometric valley (vide maps 4 and 5) is formed the rains may extend almost without a break right across the continent, being in some years very heavy and general in South Australia. On the east coast summer rains are frequent and heavy, especially when tropical "lows" pass down from the north and north-east (vide maps 2 and 3).
In South Australia the prevailing wind in summer is south east, varied by hot, dry, northerly winds, as coastal "lows" approach from the west, followed on their retreating side by a sudden shift of wind to south-west and a rapid fall of temperature depression passes, the thermometer at times falling 30° or 40° in a few hours. I have known a fall of 20° in almost as many minutes.
People in Bright Sparcs - Todd, Charles
© Online Edition Australian Science and Technology Heritage Centre and Bureau of Meteorology 2001
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