Rapidly melting glaciers are surging water volume in at least 10% of rivers in High Mountain Asia, including large rivers like Yangtze, Amu Darya and Syr Darya, according to a comprehensive new study of the region published today in AGU Advances. In parts of upstream rivers, water flow nearly doubled over the course of a decade. Communities that depend on the rivers for power could benefit from the increase in river power, but additional sediment carried in the water may clog infrastructure.

North American monarch butterflies use magnetic fields to migrate to and from their overwintering sites - using cold temperatures to tune how they use magnetic fields - per experimental study, which might be disrupted under climate change

A drought lasting 13 years and several others that each lasted over three years may have contributed to the collapse of the Classic Maya civilisation, chemical fingerprints from a stalagmite in a Mexican cave have revealed.

Researchers with the Arkansas Agricultural Experiment Staiton have found the first evidence that drought and insect herbivory can create lasting, transgenerational effects in soybeans. The stressors not only affect the parent plants but alter the traits and defenses of their offspring. The research demonstrates some of the positive and negative impacts the stressors have on a plant’s progeny and could be used to develop more resilient crops in the same season.

In Nature, 21 leading scientists today prescribe ways to use food systems to halt and reverse land degradation, underlining that doing so must become a top global priority to mitigate climate change and stop biodiversity loss. 

The article breaks new ground by quantifying the impact by 2050 of reducing food waste by 75% and maximising sustainable ocean-based food production, measures that alone could spare an area larger than Africa. 

Harvard SEAS and University of Chicago researchers have tested and validated lightweight nanofabricated structures that can passively float in the mesophere, which is about 45 miles above Earth’s surface. The devices levitate via photophoresis, or sunlight-driven propulsion, which occurs in the low-pressure conditions of the upper atmosphere.

A team led by researchers from the University of Washington used a fiber-optic cable to capture calving dynamics across the fjord of the Eqalorutsit Kangilliit Sermiat glacier in South Greenland. Data collected from the cable allowed them to document — without getting too close — one of the key processes that is accelerating the rate of glacial mass loss and in turn, threatening the stability of ice sheets, with consequences for global ocean currents and local ecosystems.  

The Greenland ice sheet is melting at an increasing rate, a process accelerated by glacier calving, in which huge chunks of ice break free and crash into the sea, generating large waves that push warmer water to the surface. Researchers at the University of Zurich and the University of Washington have now shown that this mechanism is amplifying glacial melt.