Really dry: a Colorado River aqueduct in southern California.
Historical analysis shows that natural forces are behind California’s drought, but global warming has contributed 8%-27% to the drought’s severity.
The large 1982 El Niño contributed to the Ash Wednesday bushfires that killed 75 people in south east Australia.
El Niño has arrived, it's getting stronger, and it's not about to go away soon. And already there are rumblings that this could be a big one.
Gathering data at the calving front of the Ilulissat Glacier, Greenland.
To create accurate models that predict how ice sheets and oceans will react to changing climate, modelers need precise current data. One researcher heads to the ends of the earth to collect just that.
Even another 85 years of global warming won’t stop the odd cold, snowy winter.
Andy Rain / EPA
While global warming will continue, it's important to assess variability as well as long-term average climates.
Keeping cool as Paris sees its hottest temperatures in six decades.
Etienne Laurent / EPA
Shifting air currents high up in the skies can have a big impact down on the ground.
It’s hot – but some people aren’t too bothered.
Andy Rain / EPA
Parts of the UK are sizzling thanks to Iberian air.
Hurricane path forecasts are good, but even the ‘cone of uncertainty’ doesn’t fully describe where the hazards could be.
National Hurricane Center
Forecasting successes can breed complacency in the general public. But all hurricane damage isn't necessarily contained within the "cone of uncertainty."
A broken paddle on parched earth, one result of four years of drought in California.
What explains the unusually dry and warm weather that's behind California's prolonged drought? And how is climate change contributing?
California has been inundated with stranded, hungry sea lion pups, a result of warm waters causing fish to move.
The "warm blob" of remarkably warm water in the Pacific is changing weather patterns and impacting marine life, providing clues to how ecosystems may change in a warmer future.
Whale sharks were one of the warm water species to move south during the 2010-2011 marine heatwave.
While eastern Australia trembles in the face of an El Niño, Western Australia's oceans could finally see relief from devastating marine heatwaves.
Breaking the ice: while scientists increasingly understand why Antarctic sea ice is growing, it remains tricky to forecast.
Australian Antarctic Division
Antarctica's sea ice is changing in ways that scientists didn't predict, and is now causing headaches for Antarctic stations.
Warming seas suggest El Niño is on the horizon.
El Niño is officially on, and comparing it to previous events suggests it could be big one, perhaps leading to record-breaking temperatures.
The threat of an El Niño has not gone away for Australia.
This last year we were preparing for an El Niño. But then it all just fizzled out. So what happened? And could this be the year?
Recent extreme rains such as those that hit Sydney recently are actually decreasing, but extreme rain in summer is going up.
AAP Image/NEWZULU/LISA HOSKING
Extreme rainfall in Sydney is increasing - but only in summer, potentially leading to more flash floods in the city.
The recent wild weather dumped more than 100 mm of rain on Sydney in a day.
AAP Image/David Moir
The recent wild weather that lashed New South Wales has been described as 'once-in-a-century'. But how often does it really happen?
Sand blown inland at Bondi Beach.
AAP Image/David Moir
What causes the wild weather that's hit Sydney and central New South Wales over the past 24 hours?
Clumps of thunderstorms are driving increases in rain over tropical oceans.
Image courtesy of the Earth Science and Remote Sensing Unit, NASA Johnson Space Center
For a long time climate models have forecast increasing rainfall in tropics. Now we know part of the reason: clumpy thunderstorms.
Surging tides from Cyclone Marcia hit Main Beach in Yeppoon, Queensland, with the storm packing wind gusts close to 300 kilometres an hour.
AAP Image/Karin Calvert
Emergency services are using social media to help spread warnings as two tropical cyclones batter Australia. It can also help them with relief efforts once the worst of the severe weather has passed.
Sometimes you don’t need a measuring stick to come up with an assessment: really, really deep.
The Blue Hill Observatory, a few miles south of Boston, recently recorded the deepest snow cover in their 130-year history, an incredible 46 inches. Earlier this month, Bangor, Maine tied their own record…
Despite adjustments to temperature data in the Arctic, the overall global warming trend remains the same.
Flickr/P J Hansen
Attacks on institutions that keep records of global temperatures, such as NASA, the US National Oceanic and Atmospheric Administration, the UK Met Office, and Australia’s Bureau of Meteorology, continue…