Now that we are slowly bringing the Maleny Weather Web Site back on line it is timely to emphasise the need for accuracy when down -loading data for personal use. Please note “Current Weather Data” page is using wireless sensors and cannot be used for other than a general picture of current weather. “This Month” is the page to use for accuracy when down-loading Maleny quality controlled data.
Late season El Niño remains possible
Despite most ocean and atmospheric indicators falling short of El Niño thresholds, model outlooks and recent observations indicate that a late El Niño remains possible. The Bureau’s ENSO Tracker indicates there is at least a 50% chance of El Niño developing over the coming months, which is double the long-term likelihood.
The Southern Oscillation Index (SOI) has now remained negative for several weeks, and some renewed warming has occurred across the equatorial Pacific Ocean over the past fortnight. Both support the possibility of El Niño becoming established in the months ahead. Six of the eight international climate models surveyed by the Bureau indicate El Niño, or near-El Niño, dry conditions are likely for the southern summer season.
The world is running out of time to deal with climate change, the World Meteorological Organisation has warned, after new figures showed a surge in atmospheric carbon dioxide has seen levels of greenhouse gases reach record levels A new report by the WMO said concentrations of carbon dioxide in the atmosphere have grown at their fastest rate since 1984.
The head of the United Nations’ weather agency, Michel Jarraud, said there is no doubt the climate is changing because of the burning of fossil fuels. “We know without any doubt that our climate is changing and our weather is becoming more extreme due to human activities such as the burning of fossil fuels,” Mr Jarraud said in a statement.
World Meteorological Organisation’s report the
“We must reverse this trend by cutting emissions of CO2 and other greenhouse gases across the board. We are running out of time.”
Bureau of Meteorology Media Statement
Numerous media stories have questioned the methods used by the Bureau in regard to Australia’s climate record.
Adjusting temperature data, a process known as homogenisation, is carried out by meteorological authorities around the world as best practice, to ensure that climate data is consistent through time.
As our data preparation reports explain, a key requirement for compiling and then analysing a long-term record of daily maximum and minimum temperatures for any given site is assuring that the temperature records are not artificially biased by effects that are not climate-related, such as:
Comparison between adjusted and unadjusted temperatures
Both adjusted and unadjusted temperatures show that Australia’s climate has warmed. Since 1955 adjusted and unadjusted data are virtually identical. It is during this time that most of the warming has occurred in Australia.
That marked a hike of 2.9 parts per million between 2012 and 2013 alone – the largest annual increase in 30 years, according to the Greenhouse Gas Bulletin.
A series of high pressure systems in the first half of the month tempted us to feel that Spring could not be far away. It was ideal holiday weather. A number of low pressure cells prevailed for the remainder of the month, with some areas receiving heavy falls of rain with a thunderstorm or two. At Maleny we had two consecutive days with torrential rainstorms on 23rd and 24th respectively with 124mm to fill many near empty water tanks. On Wednesday 27th at 2.45pm we had a thunderstorm with hail. Total rainfall for the month was 230.2mm.
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