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Tiny valleys near the top of Antarctica’s ice sheet reach temperatures of nearly minus 100 degrees Celsius (minus 148 degrees Fahrenheit) in the winter, a new study finds. The results could change scientists’ understanding of just how low temperatures can get at Earth’s surface, according to the researchers.

Last summer, my daughter and I hiked the Sulphur Skyline trail in Jasper National Park. As it was mid-week, we had hoped it would not be as crowded as it can be on a weekend.

Selected intervals in the past that were as warm or warmer than today can help us understand what the Earth may be like under future global warming.

A latest assessment of past warm periods, published today in Nature Geoscience by an international team of 59 scientists from 17 nations, shows that in response to the warming ecosystems and climate zones will spatially shift and on millennial time scales ice sheets will substantially shrink.

Coal power versus wind and solar energy – debates about the Paris climate targets often centre around electricity supply. Yet, even in a world of stringent climate policies and a clean power generation, the remaining use of fossil fuels in industry, transport and heating in buildings could still cause enough CO2 emissions to endanger the climate targets agreed on by the international community, an international team of researchers finds. Published in Nature Climate Change, their elaborate study is the first to focus specifically on the residual fossil fuel emissions from sectors that are not as easily decarbonized as power generation.

A quarter of the seafood tested from Metro Vancouver grocery stores, restaurants and sushi bars is not what you think it is.