Water in its solid phase, also known as ice.
AP Photo/Tony Dejak
An atmospheric scientist explains why water can do some strange-looking things at very cold temperatures, and what's different about snowfalls on Mars.
An image from the International Space Station captures plumes of smoke from California wildfires on August 4, 2018.
Haze from Northern California wildfires has drifted as far east as Philadelphia. Wildfire smoke contains many potentially toxic substances, so anyone exposed to it should take basic precautions.
The ocean absorbs about 90 percent of the excess heat produced as climate change warms the earth.
According to a new study, the oceans have absorbed more heat from climate change than previously thought. This could mean the Earth will warm even faster in the future than scientists have predicted.
Even a small cloud can weigh as much as four tonnes – but gravity, chemistry and temperature keep them floating in the sky.
One one thousand, two one thousand….
When you see a bolt of lightning, do you immediately start counting to see how far off a storm is? An atmospheric scientist parses the practice.
Seriously cold: The ‘bomb cyclone’ freezes a fountain in New York City.
AP Photo/Mark Lennihan
An atmospheric scientist who studies the Arctic explains why – because of global warming – the U.S. may be in for longer cold spells in the winter.
Clouds over Australia’s Davis Research Station, containing ice particles that activate ozone-depleting chemicals, triggering the annual ozone hole.
The treaty to limit the destruction of the ozone layer is hailed as the most successful environmental agreement of all time. Three decades on, the ozone layer is slowly but surely returning to health.
Satellite image on Sept. 7, 2017 shows three hurricanes: Irma in the center just north of the island of Hispaniola, Katia on the left in the Gulf of Mexico and Jose in the Atlantic Ocean on the right.
NOAA via AP
What scientists know – and don't know – about the linkage between climate change and hurricanes.
Hiscox and students practice for the big day with a weather balloon.
Meteorology researchers across the country are prepping experiments for the mini-night the eclipse will bring on August 21 – two minutes and 36 seconds without the sun in the middle of the day.
Hurricane Matthew approaching the east coast of Florida on Oct. 6, 2016.
Two atmospheric scientists explain how they weigh evidence such as ocean temperatures, wind speeds and other climate patterns to predict how many Atlantic hurricanes are likely to form this year.
The higher the plume, the bigger the problem.
Jim Peaco/Wikimedia Commons
When a bushfire rages so high it creates its own thunderstorm, it becomes a 'firestorm' - and makes life much more difficult for firefighters. We still have a lot to learn about what triggers them.
Iakov Kalinin / shutterstock
New study changes what we know about the pre-industrial atmosphere – and how we predict future climate change.
Ban on CFCs in aerosol sprays and refrigerants has led to a steady shrinking of the ozone hole.
What the Montreal Protocol has done for the ozone hole threat other international accords could do for climate change – if we all agree.
David Peter Robinson / shutterstock
While planes still emit too much carbon, they may also help the climate by ensuring clouds bounce more sunlight back into space.
CSIRO’s Birdsville station is one of several in Australia that monitors aerosols in our skies.
A leading NASA scientist has asked CSIRO to stay in its global network that monitors atmospheric dust and pollution. The data are vital to understand the effects on weather and climate.
Tasmania’s Cape Grim monitoring station passed a crucial carbon dioxide threshold this month.
Bureau of Meteorology
Atmospheric carbon dioxide measurements at Tasmania's Cape Grim and Antarctica's Casy Station have now officially passed 400 parts per million and are likely to stay above that for decades to come.
ESA’s Swarm constellation reveals new rapid changes of our magnetic field, tied directly to the heart of our planet’s molten iron core.
Space research never stops and it seems neither do the surprises. On ABC Breakfast News I covered some huge results from the last few weeks. Be still my beating (magnetic) heart Earth’s magnetic field…
New Horizons continues to help unravel the icy dwarf planet’s secrets.
NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute
After last summer's Pluto flyby, the New Horizons spacecraft started sending data back to Earth – at 2 kilobits per second. Here's some of what scientists have learned so far from that rich, slow cache.