Andrea Prevosti’s Post

Marine ecosystems and their components are facing increasing stress due to ocean acidification. Critically, marine organisms are exposed to this chemical stressor in addition to many other climate-related stressors, in particular warming and deoxygenation, and alongside other anthropogenic pressures such as extraction of biological resources, habitat disturbance and pollution. 👉 UNOC Nice in 2025. https://lnkd.in/eXQR9Y6Z

🚨 Today September 16 is 𝙄𝒏𝙩𝒆𝙧𝒏𝙖𝒕𝙞𝒐𝙣𝒂𝙡 𝘿𝒂𝙮 𝒇𝙤𝒓 𝙩𝒉𝙚 𝙋𝒓𝙚𝒔𝙚𝒓𝙫𝒂𝙩𝒊𝙤𝒏 𝒐𝙛 𝙩𝒉𝙚 𝙊𝒛𝙤𝒏𝙚 𝙇𝒂𝙮𝒆𝙧. The 𝙊𝒛𝙤𝒏𝙚 𝙇𝒂𝙮𝒆𝙧 🌍 is a shield of gas in the Earth's atmosphere that protects the planet, absorbing the sun's 𝐔𝐥𝐭𝐫𝐚𝐯𝐢𝐨𝐥𝐞𝐭 (𝐔𝐕) ray and helping to preserve all life on the planet. The 𝙈𝒐𝙣𝒕𝙧𝒆𝙖𝒍 𝑷𝙧𝒐𝙩𝒐𝙘𝒐𝙡 ✍️ adopted in 1987 is considered one the world's most successful environmental treaties. Amended in 𝑲𝙞𝒈𝙖𝒍𝙞 in 2016 the 𝑷𝙧𝒐𝙩𝒐𝙘𝒐𝙡 was adopted to regulate the production and consumption of chemicals aka 𝑶𝙯𝒐𝙣e 𝑫𝙚𝒑𝙡𝒆𝙩𝒊𝙣𝒈 𝑺𝙪𝒃𝙨𝒕𝙖𝒏𝙘𝒆𝙨 (𝑶𝘿𝑺). When released into the atmosphere, these chemicals damage the stratospheric 𝙊𝒛𝙤𝒏𝙚 𝙇𝒂𝙮𝒆𝙧 🌍 #ProtectTheOzone #savetheplanet🏡 #climatechangeisreal #letsgogreen🟢

#ClimateCrisis: The world’s oceans are facing a “triple threat” of extreme heating, a loss of oxygen and acidification, with extreme conditions becoming far more intense in recent decades and placing enormous stress upon the planet’s panoply of marine life, new research has found. https://lnkd.in/emEiZ-6v

Curious about the silent threats wildfires pose to your well-being, even miles away from the flames? Take just 3 minutes to explore their effects on air quality and human health from behind-the-scenes revelations of my latest article: "Rapid transformation of wildfire emissions to hurmful background aerosol" that was published in Nature pj: Climate and Atmospheric Science.

New synthesis paper on natural and anthropogenic carbon fluxes and uptake in the Southern Ocean. #ocean #climate #co2 #carbon Main findings based on ship and profiling float data and ocean biogeochemical models are: Ocean models and machine learning estimates agree on the mean Southern Ocean CO2 sink, but the trend since 2000 differs by a factor of two REgional Carbon Cycle Assessment and Processes Project Phase 2 estimates a 50% smaller Southern Ocean CO2 sink for the same region and timeframe as RECCAP1 Large model spread in summer and winter indicates that sustained efforts are required to understand driving processes in all seasons Hauck et al. 2023: The Southern Ocean carbon cycle 1985-2018: mean, seasonal cycle, trends, and storage, Global Biogeochem. Cycles, e2023GB007848, https://lnkd.in/eVPPRZre

Researchers at USC, Caltech, MIT, Delft University, and the Yukon River Inter-Tribal Watershed Council have published a study introducing a more accurate means of measuring the mercury released as permafrost thaws. Because the Arctic is warm up to four times faster than the global average, releasing the mercury sequestered in permafrost creates environmental and health threats to 5M people who live in the Arctic. More than 3M live in areas where permafrost is expected to vanish entirely by 2050. Atmospheric circulation has resulted in substantial mercury deposits in Arctic soils, sequestered by the frozen permafrost. The has resulted in much larger mercury concentrations—more than that held in the atmosphere, biosphere, oceans, and sub-arctic soils combined. Because mercury accumulates in the food chain, species whose diet includes fish and game—including humans—are at increased risk for gradual mercury poisoning. #climateimpacts https://ow.ly/rI9q50Tpv2G

Deoxygenation silently affects our oceans and lakes, risking a breach of planetary boundaries. This loss of oxygen threatens marine life and could have far-reaching impacts on our planet’s health. Explore what this means for our future and how we can help. #SaveOurOceans #ClimateCrisis #MarineConservation https://lnkd.in/gCB_7TTu

Recent research provides alarming new insights into the “triple threat” faced by the world’s #ocean. Extreme heating, a loss of oxygen and #OceanAcidification have driven more intense extreme conditions in recent decades, placing enormous stress upon the planet’s panoply of marine life, ocean ecosystems and the invaluable services they provide. As we lead up to #WorldOceanDay 2024, this is yet another illustration of the need for #OceanScience and #OceanAction to restore ocean health, stem and reverse the tide of marine #biodiversity loss, sustainably manage and preserve the marine environment and ensure the long term integrity of the planet’s great blue lung.

NEWS: In hot water and beyond: Marine extremes escalate. "Because #climatechange has generally been heating the ocean, boosting its acidity, and lowering its oxygen levels, concerns over these regional multi-threat events—known as column-compound extremes—are growing. Now, Joel Wong and colleagues report in AGU Advances that since the early 1960s, column-compound extremes have been intensifying: growing larger in volume, lasting longer, and occurring more often. The team came to these conclusions by using the #CommunityEarthSystemModel to create a computational simulation of the upper 300 meters of the global #ocean from 1961 to 2020. The analysis suggests that triple column-compound extremes—events involving the convergence of extreme temperatures, high acidity, and low oxygen levels—occupied 39 times more ocean volume, lasted three times longer, and were six times more intense by 2020 than in the early 1960s." Read the full article: https://lnkd.in/eiMgP3Tn

SRCX. Canadian Arctic Survey, Brooks Range, 1000km, Alaska-Yukon, 2024. Temperatures across the Arctic Biosphere have increased on average ^2.4C since 2006 est, ^6.2C, by 2032-36. Adverse impact; Over 75 Rivers and Estuaries flowing from the Brooks Range watershed into the Yukon Territory are experiencing alarming acidity levels never seen before. Thawing permafrost leaching iron from previously unexposed bedrock and bacterial mobilization of iron from soil is causing, ie; oxidization, low dissolved oxygen content. The pH scale, acidic, neutral, or alkaline. ^Ph 6.4 - ^3.5 similar to industrial waste water having a "lethal impact" acidosis, on all down stream species dependent on this essential hydro-logical resource. Too many Government Agencies and NGO's are ignoring the urgency of the climate emergency. These ongoing and significant anthropologically induced threats continue to push populations of all species across Alaska and Yukon Territory to their extinction. Scott R. Chadwick Whitehorse, Yukon, Canada. 1. ^ "Trophic". Merriam-Webster Dictionary. Retrieved 16 April 2017 2. ^ Lindeman, R.L. (1942) Tropho-dynamics, the cycling of mass, energy and nutrients, determines how marine ecosystems function and respond to both internal and external pressures, as food web pathways adapt to facilitate ecosystem resilience and persistence. 3.^ Iron-oxidizing. This process occurs in two steps: first, iron dissolves in the acid solution produced by the moisture and the carbon dioxide of the air, to form ferrous iron and liberate hydrogen; second, oxygen from the air oxidizes the ferrous iron to form hydrated ferric oxide. 4.^ Bacterial mobilization. At least 18 types of bacteria are classified as iron bacteria, long thread-like bacteria that “feed” on iron and secrete slime. Unlike most bacteria, which feed on organic matter, iron bacteria fulfill their energy requirements by oxidizing ferrous iron into ferric iron. Brooks Range, 1000km, Alaska-Yukon, 2024.