AT THE POINT
Point information & photos: Col Grant. Taken mid afternoon Sept 2008. Authors email: firstname.lastname@example.org
IN THE DEGREE SQUARE
Observations carried out on dune summit. Exact degree confluence on dune slope 100 m to the east. Site is on the north-south section of the QLD-SA border, in the Lake Eyre Basin
Climate: The closest representative weather station to the confluence is at Tibooburra, in New South Wales, which is to the south west, and has an elevation of 183 m. This station has been collecting data since 1886.
The highest temperature recorded was 47.6°C in December 1973, and the lowest was -2.5°C in June 1982. The greatest rainfall recorded in a year was 755.4 mm in 1974, and the lowest was 47.9 mm in 1919. These and other climate statistics for Tibooburra can be found at on the Australian Bureau of Meteorology website, http://www.bom.gov.au/climate/averages/tables/cw_046037_All.shtml.
Extremes of Nature: Despite the area's inland location, it is still subject to the impact of some cyclones. The database maintained by the Bureau of Meteorology shows that only 3 cyclones have tracked within 200 km of the confluence, none of which passed within 50 km of the point. These cyclones bring with them potentially destructive winds and intense rainfall. Cyclone information for this area and all of Australia can be found at the Australian Bureau of Meteorology website, http://www.bom.gov.au/cgi-bin/silo/cyclones.cgi.
Cyclone tracks within 200 km of the confluence, 1906 to 2006 (Bureau of Meteorology web site)
Extreme heat and drought are also serious issues. Records show that Tibooburra experiences 75 days annually with temperatures over 35°C, 17 of which typically reach 40°C or warmer. Such extreme temperatures can cause heat stroke and death if appropriate measures are not taken such as avoiding strenuous physical effort, keeping as cool as possible and drinking lots of water. Heat waves kill more people in Australia than all other natural hazards combined. In addition, with little rainfall and only 32 days a year on average with any rain, the area is also among the driest in Australia.
Today: Today: The population of the degree square is less than 50 though during the winter tourist season this may increase as people visit the Dig Tree site on Nappa Merri station or travel on to the South Australian settlement of Innamincka which is a few kilometres over the border.
Burke's Tree, Cooper Creek
More images of places within 28°S 141°E can be seen if you click HERE (under construction). It will lead you to our Trips photo essay page.
Edited by: Hayley Freemantle
More to come soon