Tukpahlearik Creek in northwestern Alaska’s Brooks Range runs bright orange where permafrost is thawing. Photo: Taylor Roades / Scientific American

Why are Alaska’s rivers turning orange? “It was a famous, pristine river ecosystem, and it feels like it’s completely collapsing now”

By Alec Luhn 24 December 2023 (Scientific American) – It was a cloudy July afternoon in Alaska’s Kobuk Valley National Park, part of the biggest stretch of protected wilderness in the U.S. We were 95 kilometers (60 miles) from the nearest village and 400 kilometers from the road system. Nature doesn’t get any more unspoiled. […]

Correlation of significant shifts in or appearances of markers between sites documenting the onset of the Anthropocene. Collectively, the 12 reference sites, via analysis across many sites using similar multiple proxies, show the extent to which the proxies at each site cluster at an approximately coincident level around the mid-20th century, consistent with the Great Acceleration Event Array (GAEA) proposed by Waters et al. (2022). This demonstrates the degree to which the primary marker chosen at a site represents the range of critical changes encompassed by that section. Each site team has identified a level where significant changes cluster, these ranging in age between 1945 and 1968 CE, though for most sites the level chosen dates to the 1950s. Graphic: Waters, et al., 2023 / The Anthropocene Review

Canadian lake sediments reveal start of Earth’s Anthropocene epoch – “Clearly, the biology of the planet has changed abruptly. We cannot go back to a Holocene state now.”

By David Stanway 11 July 2023 (Reuters) – Sediment deposited at Crawford Lake, a small but deep body of water in Canada’s Ontario province, provides unmistakable evidence that Earth entered a new human-driven geological chapter – the Anthropocene epoch – some seven decades ago, a team of scientists said on Tuesday. The members of the […]

Changing Chesapeake Bay acidity impacting oyster shell growth

Cambridge, Md. (June 10, 2010) – Acidity is increasing in some regions of the Chesapeake Bay even faster than is occurring in the open ocean, where it is now recognized that increased levels of atmospheric carbon dioxide dissolve in the seawater thereby making it more acidic. These more acidic conditions in key parts of Chesapeake […]

Seedlings to be planted in dry lake beds of Southern Australia

May 4, 2010 – 4:50PM (AAP) Work has begun on planting more than 1 million native seedlings in the exposed beds of South Australia’s lower lakes. Federal Water Minister Penny Wong and South Australian Environment Minister Paul Caica said the hand planting would vegetate more than 2300 hectares of exposed lake beds across Lake Alexandrina […]

Australia coal plant still polluting river beyond guidelines

By BEN CUBBY, ENVIRONMENT EDITORApril 20, 2010 THE NSW government has tightened the pollution licence of a coal-fired power plant near Lithgow that is releasing toxic metals into a river that feeds Sydney’s drinking water supply. Delta Electricity, the owner of Wallerawang power plant, must now monitor heavy metals and pollutants such as arsenic flowing […]

Graph of the Day: Calcification in Great Barrier Reef Coral, 1900-2005

This graph shows an overall decrease in the rate of calcification in Porites corals on the Great Barrier Reef since 1900. Since 1980, there has been a dramatic decrease in the calcification rate, which has been attributed to increasing acidification and increasing sea temperature stress. The light blue bands indicate 95 per cent confidence intervals […]

Bodega Bay mollusk shells dissolving as ocean becomes acidic

  By Bob Norberg, THE PRESS DEMOCRAT The danger from increasing levels of acid in the ocean, which could devastate California’s shellfish industry, is under investigation by Bodega Bay scientists. It is painstaking work that requires the team to wade through knee-deep mud at Tomales Bay to collect native Olympic oysters and then raise their […]

Coral reefs: ‘absolute guarantee of their annihilation’

Destroyed by rising carbon levels, acidity, pollution, algae, bleaching and El Niño, coral reefs require a dramatic change in our carbon policy to have any chance of survival, report warns By David Adam Animal, vegetable and mineral, a pristine tropical coral reef is one of the natural wonders of the world. Bathed in clear, warm […]

Outlook poor for Great Barrier Reef

By Rob Taylor CANBERRA (Reuters) – Australia’s Great Barrier Reef, the world’s largest living organism, is under grave threat from climate warming and coastal development, and its prospects of survival are “poor,” a major new report found on Wednesday. While the World Heritage-protected site, which sprawls for more than 345,000 square km (133,000 sq miles) […]

Acidic seas fuel extinction fears

Increasing levels of acidity in oceans could trigger a mass extinction of sea life, a leading scientist warns. By Roger Harrabin, Environment analyst, BBC News Carbon dioxide emissions from human activities are acidifying the oceans and threaten a mass extinction of sea life, a top ocean scientist warns. Dr Carol Turley from Plymouth Marine Laboratory […]

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