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Australia's environment in 'shocking' decline, report finds

Overhead view of trees destroyed by bushfires in Australia

Australia has suffered a litany of natural disasters in recent years including historic bushfires


Australia's environment is in a shocking state and faces further decline from amplifying threats, according to an anticipated report.

The survey of Australia's ecological systems - conducted every five years - found widespread abrupt changes.

These can be blamed on climate change, habitat loss, invasive species, pollution and mining, it said.

The threats are not being adequately managed - meaning they are on track to cause more problems.

Extreme weather: What is it and how is it connected to climate change?

People around the globe are experiencing dramatic heatwaves, deadly floods and wildfires as a result of climate change.

The UK and parts of Europe have seen temperatures of above 40C this month, leading to transport disruption and water shortages.

Emissions caused by the burning of fossil fuels have been trapping heat in the atmosphere since the start of the industrial era. This extra heat isn't evenly distributed across the globe, and bursts out extreme weather events.

Unless global emissions are cut, this cycle will continue.

Here are four ways climate change is changing the weather.

1. Hotter, longer heatwaves

To understand the impact of small changes to average temperatures, think of them as a bell curve with extreme cold and hot at either end, and the bulk of temperatures in the middle.

A small shift in the centre means more of the curve touches the extremes - and so heatwaves become more frequent and extreme.

Brazil drought - deforestation and slash and burn land clearing causing drought in Sao Paulo, Brazil

low water levels in Sao Paulo Brazil Cantareira reservoir caused by slash and burn deforestation 2014
slash and burn deforestation in Para Brazil causing drought 2009

Mud in reservoir: Levels in the Cantareira reservoir system remain dangerously low. Fires to clear land for agriculture in Sao Felix Do Xingu municipality, Para, Brazil - June 20, 2009. In Brazil's biggest city, a record dry season and ever-increasing demand for water has led to a punishing drought. It has actually been raining quite heavily over the last few days in and around Sao Paulo but it has barely made a drop of difference. The main reservoir system that feeds this immense city is still dangerously low, and it would take months of intense, heavy rainfall for water levels to return to anything like normal. So how does a country that produces an estimated 12% of the world's fresh water end up with a chronic shortage of this most essential resource - in its biggest and most economically important city? It's interesting to note that both the local state government and the federal government have been slow to acknowledge there is a crisis, despite overwhelming evidence to the contrary. That might have been a politically expedient position to take during the recent election campaign, when the shortage of water in Sao Paulo was a thorny political issue, but the apparent lack of urgency in the city and wider state now is worrying many. At the main Cantareira reservoir system, which feeds much of this city's insatiable demand for water, things have almost reached rock bottom. Huge pipes suck out what water remains as the reservoir dips below 10% of its usual capacity.

Jet stream changed by Global Warming changing weather patterns

We may have to get used to winters where spells of weather go on for weeks - or even months.

New research suggests that the main system that helps determine the weather over Northern Europe and North America may be changing.

The study shows that the so-called jet stream has increasingly taken a longer, meandering path.

This has resulted in weather remaining the same for more prolonged periods.

The work was presented at the annual meeting of the American Association for the Advancement of Science (AAAS) in Chicago.

The observation could be as a result of the recent warming of the Arctic. Temperatures there have been rising two to three times faster than the rest of the globe.

According to Prof Jennifer Francis of Rutgers University in New Jersey: "This does seem to suggest that weather patterns are changing and people are noticing that the weather in their area is not what it used to be."

“We can expect more of the same and we can expect it to happen more frequently” Prof Jennifer Francis, Rutgers University

The meandering jet stream has accounted for the recent stormy weather over the UK and the bitter winter weather in the US Mid-West remaining longer than it otherwise would have.

"We can expect more of the same and we can expect it to happen more frequently," says Prof Francis

The jet stream, as its name suggests, is a high-speed air current in the atmosphere that brings with it the weather.

It is fuelled partly by the temperature differential between the Arctic and the mid-latitudes.

2013 warmest year

2013 warmest on record

 

Proof of Climate Change - Global Warming in Europe

Flooded properties as the River Tiber, Rome, breaches its banks (Getty Images)

 

The cost of damage from extreme weather events is projected to increase in the future.