Flux continu

Thousands of Greenland's crystal-clear blue lakes have turned a murky brown thanks to global warming — and the worst part is that they've started emitting carbon dioxide. Record heat and rain in 2022 pushed the lakes of West Greenland past a tipping point, so rather than absorbing carbon dioxide (CO₂), they began to emit it into the atmosphere, according to a new study.

L’élection de Donald Trump, connu pour ses propos élogieux envers Vladimir Poutine, est souvent perçue comme une très mauvaise nouvelle pour l’Ukraine. Or ce ne sera pas nécessairement le cas.

An international research team has established a link between aquatic deoxygenation and the general stability of terrestrial systems, which should lead to the inclusion of deoxygenation as the tenth planetary boundary. This study also proposes to improve tools for monitoring and predicting aquatic systems, and oxygen in particular, by developing numerical models of improved accuracy and setting up a global database of the highest quality.

Plastic debris is thought to be widespread in freshwater ecosystems globally1. However, a lack of comprehensive and comparable data makes rigorous assessment of its distribution challenging2,3. Here we present a standardized cross-national survey that assesses the abundance and type of plastic debris (>250 μm) in freshwater ecosystems. We sample surface waters of 38 lakes and reservoirs, distributed across gradients of geographical position and limnological attributes, with the aim to identify factors associated with an increased observation of plastics. We find plastic debris in all studied lakes and reservoirs, suggesting that these ecosystems play a key role in the plastic-pollution cycle. Our results indicate that two types of lakes are particularly vulnerable to plastic contamination: lakes and reservoirs in densely populated and urbanized areas and large lakes and reservoirs with elevated deposition areas, long water-retention times and high levels of anthropogenic influence. Plastic concentrations vary

Climate change and human activities increasingly threaten lakes that store 87% of Earth’s liquid surface fresh water. Yet, recent trends and drivers of lake volume change remain largely unknown globally. Here, we analyze the 1972 largest global lakes using three decades of satellite observations, climate data, and hydrologic models, finding statistically significant storage declines for 53% of these water bodies over the period 1992–2020. The net volume loss in natural lakes is largely attributable to climate warming, increasing evaporative demand, and human water consumption, whereas sedimentation dominates storage losses in reservoirs. We estimate that roughly one-quarter of the world’s population resides in a basin of a drying lake, underscoring the necessity of incorporating climate change and sedimentation impacts into sustainable water resources management.

Au plus fort de la crise sanitaire, les majors pétrolières voyaient leur valeur s'effondrer et annonçaient des plans de transition sans enthousiasme. Elles font désormais des bénéfices historiques et ont déjà oublié leurs engagements d'hier.

Europa maakt de ergste crisis qua levensduurte sinds decennia door als gevolg van de stijgende energie- en voedselprijzen. Covid, de oorlog in Oekraïne en de klimaatverandering hebben de stijging van de grondstoffenprijzen nog verergerd, met voedseltekorten en een snel toenemende voedselonzekerheid in de ontwikkelingslanden tot gevolg. Maar er is ook goed nieuws, schrijven Sarah Lake en Nico Muzi van non-profitorganisatie Madre Brava: met een eenvoudige maar cruciale verandering in de voedselproductie kan de Europese Unie de inflatie van de voedselprijzen verlichten en de mondiale voedselvoorziening schragen.

The American West has gone bone dry, the Great Salt Lake is vanishing and water levels in Lake Mead and Lake Powell, the two great life-giving reservoirs on the Colorado River basin, are declining with alarming speed. Wildfires are incinerating crops in France, Spain, Portugal and Italy, while parts of Britain suffocated last week in temperatures exceeding 100 degrees Fahrenheit.

A report released Wednesday warns that rising lake levels, strong wind gusts and high waves are inching closer to flooding hazardous spots in northern Illinois, including coal, nuclear and Superfund sites.

Against the backdrop of the water crisis in the Colorado River Basin, where the country's largest reservoirs are plunging at an alarming rate, California's two largest reservoirs — Shasta Lake and Lake Oroville — are facing a similar struggle.