Earth, Environment, and Geosciences

2475 readers
40 users here now

Welcome to c/EarthScience @ Mander.xyz!



Notice Board

This is a work in progress, please don't mind the mess.



What is geoscience?

Geoscience (also called Earth Science) is the study of Earth. Geoscience includes so much more than rocks and volcanoes, it studies the processes that form and shape Earth's surface, the natural resources we use, and how water and ecosystems are interconnected. Geoscience uses tools and techniques from other science fields as well, such as chemistry, physics, biology, and math! Read more...

Quick Facts

Rules

  1. Don't throw mud. Be kind and remember the human.
  2. Keep it rooted (on topic).
  3. No spam.


Jobs

Teaching Resources

Tools

Climate



Similar Communities


Sister Communities

Science and Research

Biology and Life Sciences

Plants & Gardening

Physical Sciences

Humanities and Social Sciences

Memes

founded 2 years ago
MODERATORS
1
2
3
 
 

Please post any relevant links you would like to add to the resource collection on the sidebar! :) Eventually I will go through my bookmarks too! Any kind of tools, important websites or references are welcome.

4
5
6
 
 

For more than a century, a patch of cold water south of Greenland has resisted the Atlantic Ocean’s overall warming, fueling debate amongst scientists. A new study identifies the cause as the long-term weakening of a major ocean circulation system.

Researchers from the University of California, Riverside show that only one explanation fits both observed ocean temperatures and salinity patterns: the Atlantic Meridional Overturning Circulation, or AMOC, is slowing down. This massive current system helps regulate climate by moving warm, salty water northward and cooler water southward at depth.

7
 
 

A remote outcrop in Canada harbors rocks that are at least 4.16 billion years old, researchers report June 26 in Science. If true, these rocks would be the oldest known on Earth and the first to date to the planet’s earliest and most mysterious eon.

The finding is the latest salvo in a debate that began in 2008 about the reliability of geochemical methods used to assess the age of this outcrop. In the new study, the scientists bolster their oldest-rock claim by using two distinct methods based on the radioactive decay of elements to date ancient magma that intruded into even older parent rocks. Both methods provided the same 4.16-billion-year-old date.

8
9
 
 

archived (Wayback Machine):

10
 
 

archived (Wayback Machine):

11
 
 

cross-posted from: https://slrpnk.net/post/23410145

  • Más de 50 investigadores de siete países dan cuenta de la paulatina degradación de la Antártida: microplásticos en el agua, derretimiento del hielo y pérdida de salinidad del océano austral.
  • Dada la conexión que existe entre la Antártida y la Amazonía, los científicos no descartan que en el hielo existan rastros de los incendios forestales.
  • La situación es preocupante puesto que la Antártida, aunque remota, tiene una dinámica de conexión constante con el resto del planeta.
  • Los cambios que ocurren en ella influyen en la regulación del clima global.

archivado (Wayback Machine)

12
 
 

cross-posted from: https://slrpnk.net/post/23409897

  • An expedition by more than 50 researchers from seven countries has documented the gradual degradation of Antarctica: microplastics in the water, melting ice, and declining salinity in the Southern Ocean.
  • The team found microplastics in both glacial ice and seawater.
  • They also noted that atmospheric “rivers” are sending ash-laden air from Amazon forest fires to Antarctica, hastening the melting of snow and ice there.
  • The accelerated melting means more freshwater is rushing into the Southern Ocean, reducing the salinity level and affecting the phytoplankton that form the basis of the marine food chain.

archived (Wayback Machine)

13
 
 

Atmospheric rivers, while vital for replenishing water on the U.S. West Coast, are also the leading cause of floods though storm size alone doesn't dictate their danger. A groundbreaking study analyzing over 43,000 storms across four decades found that pre-existing soil moisture is a critical factor, with flood peaks multiplying when the ground is already saturated.

archived (Wayback Machine)

14
 
 

The pumps irrigate farms all around the lake, which is four times the size of Manhattan, and are vital for hundreds of thousands of people.

Ethiopia has already lost at least one large lake -- Haramaya, in the east of the country -- to over-pumping.

Now it risks losing another.

Lake Dembel's depth has halved since 1990 from four metres to two (13 feet to over six), according to Wetlands International, an NGO.

"If things continue like this, the lake could disappear," said its project manager Desalegn Regassa.

Pumping by farmers and industry is not the lake's only problem. Heavy pesticide use is also killing its fish, locals and the NGO say.

15
 
 

cross-posted from: https://lemmy.sdf.org/post/36620663

Archived

[...]

While the harmful impacts of Chinese development projects are increasingly covered by African press and international watchdogs, they are nearly invisible in Chinese domestic media. State-run outlets like People’s Daily, Xinhua, and CCTV instead push positive messaging about economic partnerships and “South-South cooperation.” If there are local faces, they are often African presenters and reporters hired by Chinese state media at higher-than-local pay rates, who are tasked with presenting upbeat narratives that reinforce official talking points.

Commercial Chinese media — often perceived as more independent — largely follow suit. If stories touch on environmental issues at all, they do so in vague, sanitized terms that avoid direct attribution of harm to Chinese companies or projects.

Chinese investment and the presence of Chinese companies in Africa, in addition to their visible infrastructure and economic impact, are rarely scrutinized in terms of environmental harm within Chinese media. When environmental damage is addressed at all within Chinese media, it is either omitted or framed as incidental, often blamed on African mismanagement or natural challenges. Local community members are rarely quoted, interviewed, or centered in the storytelling. Instead, they remain nameless, stripped of agency, and disconnected from the audience.

And yet, the consequences of mega-development projects are real. In many countries in Africa where China has implemented projects, environmental problems have been repeatedly denounced. Deforestation, displacement of populations, loss of biodiversity in the construction of dams has damaged Sudan, Ghana, and the DRC; water pollution, and resulting negative health impacts due to mining are impacting Guinea, the DRC, and Mozambique; expropriations and violence in the context of a hydrocarbon project have destabalazed Uganda and Tanzania; and more.

[...]

In Kenya, for example, the Standard Gauge Railway (SGR) — one of the flagship projects in China's Belt and Road Initiative (BRI), its mega global infrastructure project — has cut through wildlife migration routes and alarmed conservationists. Some environmentalists have alleged “the railway has disrupted wildlife migration routes.” Yet despite its scale and promise, many Kenyans say they have seen little benefit from the railway, pointing to a deep disconnect between grand development narratives and realities on the ground.

In Nigeria, Chinese-run mining operations have been linked to water contamination and community displacement. In Rwanda, locals affected by Chinese-financed hydropower initiatives report land loss and inadequate compensation.

[...]

The few mentions of corporate responsibility rarely, if ever, include Chinese firms operating on the continent. This silence is not accidental. It is structural, political, and strategic.

[...]

China’s domestic media environment has undergone a dramatic transformation under Xi Jinping, whose administration emphasizes tightly controlled narratives that advance national pride and global ambition. Criticism of Chinese companies abroad, particularly on environmental issues, is seen as undermining these goals.

Meanwhile, China has aggressively expanded its media footprint in Africa — stationing more Chinese journalists across the continent and recruiting local African reporters to appear in state media broadcasts to provide “African faces” for Chinese narratives. These reports rarely diverge from official messaging. As one recent state-owned Global Times article framed it, “Environmental cooperation is not only a development priority but a symbol of the strong friendship and mutual trust between China and Africa.”

[...]

Environmental lawyer Zhang Jingjing, who has spent over a decade handling environmental rights cases involving Chinese enterprises in Africa, sees this erasure as both intentional and systemic. “Chinese-language and foreign-language reporting are like two entirely different worlds — Chinese reports are few, often absent, and when they exist, they’re pure praise,” she said in an interview with Global Voices.

Despite working in multiple African countries, she has never been approached by a Chinese journalist about her work. “Not a single Chinese journalist has interviewed me to understand what impact Chinese companies are having on local communities,” Zhang said.

[...]

"The state’s slogan about ‘telling China’s story well’ has already set the tone. A lot of these projects clearly have problems, but if they’re not ‘good stories,’ they simply won’t get reported," [Zhang said].

[...]

Chinese reporters who cross political red lines risk severe consequences, including censorship, job loss, surveillance, detention, or imprisonment under vague charges like “picking quarrels” or “subverting state power.” Some have faced public shaming, forced confessions, and threats to their families. When media organizations in China cross political red lines, their articles are swiftly deleted, and entire websites can be shut down. Editors and responsible officials are often removed from their positions. In the most severe cases, the media outlet itself may be permanently closed.

[...]

In Kenya, local authorities echo the rhetoric, eager to preserve investment and diplomatic warmth. But it comes at a cost: several Kenyan journalists describe growing difficulty in reporting critically on Chinese projects without editorial pushback or quiet blacklisting.

For Chinese media, the logic is simple: these are not stories that sell, politically or commercially. They are far removed from the interests of most domestic readers, and they risk undermining the carefully polished international image Beijing wants to present.

This one-sided narrative has profound implications for climate justice. It denies African communities the dignity of visibility and Chinese citizens the chance to understand the consequences of their country’s outward expansion. Real sustainability cannot rely on curated image-making. It demands transparency, access, and the courage to confront harm — not bury it.

16
 
 

cross-posted from: https://lemmy.sdf.org/post/36441283

Archived

[...]

While China touts its ecological civilisation – a new system of development that stresses the harmonious coexistence of humanity and nature – at home, its voracious appetite for imported soy, beef, palm oil, and tropical timber has caused damage across some of the world’s most critical ecosystems. According to a recent Forest Trends report, China’s tropical deforestation footprint, linked to imports of high-risk agricultural and timber commodities, accounted for as much as five per cent of carbon emissions from tropical and subtropical deforestation during 2013–22.

The environmental consequences of these imports don’t stop at deforestation. They also carry a massive carbon price tag. China’s imported deforestation, led by trade with Brazil, Indonesia, and Malaysia, is responsible for as much as 200 million metric tons of CO2 per year. That’s equivalent to 20–30 per cent of China’s domestic agricultural emissions. Worse still, these embedded emissions are invisible in its nationally determined contributions (NDCs) under the Paris Agreement, creating a glaring climate credibility gap.

[...]

China’s role in driving deforestation in Brazil’s Amazon Basin is increasingly alarming. The region loses about 133 square kilometres of forest each year, equivalent to over 400 football fields daily, primarily due to agricultural expansion for beef and soybean production. These commodities feed global markets, with China being a dominant consumer. In 2022, 96 per cent of China’s soy imports originated from soy-producing regions linked to deforestation, compared to only 55 per cent for the European Union.

[China’s rising demand] threatens to reverse environmental progress in Brazil.

[...]

Indonesia offers a stark, immediate example of ecological damage tied directly to China’s regional trade ambitions. While China boasts investments in clean energy and infrastructure through its Belt and Road Initiative, it is simultaneously driving forest destruction via its voracious demand for palm oil, pulpwood, and mining materials. A Traise Earth analysis found palm oil deforestation on Sumatra surged 3.7 times between 2020 and 2022, a spike fuelled in part by soaring Chinese demand and domestic consumption. The study also revealed China has overtaken the EU and India as Indonesia’s top palm oil buyer, snatching a growing share of exports.

[...]

Moreover, the China strategy’s moral hazard sets a chilling precedent. If a country with the rich capacities and strong political influence of China can pursue a two-track environmental policy – green at home, grey abroad – why shouldn’t others follow suit? In an already stressed world, this dishonesty has the potential to lock us in a vicious cycle of hollow commitments and permanent ecological tipping points. It is greenwashing at a national level.

[...]

17
18
 
 

cross-posted from: https://mander.xyz/post/31779724

Here you can download the report: Building a Global Minerals Trust for a Just Green Transition [pdf]

UN scientists, experts propose "Global Minerals Trust" - a cooperative, multilateral governance mechanism to ensure sustainable, conflict-free access to critical minerals

Key points:

  • Today, more than 70% of global production for key critical minerals is concentrated in just a few countries, raising serious concerns about supply security, market volatility, and geopolitical risk.
  • Achieving a just and sustainable energy transition hinges on fair and reliable access to critical minerals—materials key for low-carbon technologies. However, global supply chains remain environmentally damaging and vulnerable to geopolitical tensions, creating systemic risks for both climate and economic goals.
  • A Global Minerals Trust offers a new multilateral model to promote responsible stewardship, fair pricing, and secure equitable access to strategic minerals--balancing national sovereignty with planetary responsibility.
  • The Trust can advance a just and circular transition by enabling pooled investment, transparent trade, mineral recycling, and benefit-sharing with resource-producing nations, particularly in the Global South.
  • Global cooperation through platforms such as the G7, G20, IGF, and United Nations is essential to coordinate action and build a resilient, inclusive, and future-proof minerals governance system.
  • The Trust would include independent audit mechanisms—similar to those used by the International Atomic Energy Agency—to ensure environmental and social safeguards.
  • Countries would retain full sovereignty over their resources while committing to prioritize mineral flows for green technologies and avoid politicized supply disruptions.

Canada’s 2025 G7 presidency offers a strategic opportunity to facilitate early-stage consensus around the Trust, drawing on its strengths in environmental diplomacy and multilateral engagement, the report says.

19
 
 
  • Water tests from the Kok and Sai rivers near Thailand’s border with Myanmar have revealed elevated arsenic levels, leading Thai officials to warn citizens to avoid contact with river water.

  • The pollution is widely believed to be linked to unregulated mining in Myanmar’s Shan state.

  • Extraction of gold in Shan State has surged in the years since the 2021 military coup in Myanmar; more recently, mounting evidence suggests rare earth mining is also expanding across the state.

  • Elevated arsenic levels have also been found at testing points in the Mekong, which is fed by both the Kok and Sai rivers.

20
 
 

Ocean acidification has already crossed a crucial threshold for planetary health, scientists say in unexpected finding

Until now, ocean acidification had not been deemed to have crossed its “planetary boundary”. The planetary boundaries are the natural limits of key global systems – such as climate, water and wildlife diversity – beyond which their ability to maintain a healthy planet is in danger of failing. Six of the nine had been crossed already, scientists said last year.

However, a new study by the UK’s Plymouth Marine Laboratory (PML), the Washington-based National Oceanic and Atmospheric Administration and Oregon State University’s Co-operative Institute for Marine Resources Studies found that ocean acidification’s “boundary” was also reached about five years ago.

21
 
 

Peatlands are one of the world’s biggest carbon sinks. These naturally waterlogged boggy swamps can hold thousands of years’ worth of compressed, partially decomposed vegetation matter — despite covering just 3-4% of Earth’s land surface, they’re thought to store more carbon per area than the world’s forests combined.

In honor of World Peatland Day on June 2 we present three recent Mongabay stories that shed light on this critical ecosystem.

archived (Wayback Machine)

22
 
 

cross-posted from: https://slrpnk.net/post/22955101

archived (Wayback Machine)

23
 
 

cross-posted from: https://slrpnk.net/post/22954674

Abstract

Most oceans over the globe have experienced surface warming during the past century, but the subpolar Atlantic is quite otherwise. The sea surface temperature cooling trend to the south of Greenland, known as the North Atlantic Warming Hole, has raised debate over whether it is driven by the slowing of the Atlantic Meridional Overturning Circulation. Here we use observations as a benchmark and climate models as a tool to demonstrate that only models simulating a weakened historical Atlantic overturning can broadly reproduce the observed cooling and freshening in the warming hole region. This, in turn, indicates that the realistic Atlantic overturning slowed between 1900 and 2005, at a rate of −1.01 to −2.97 Sv century^−1^ (1 Sv = 10^6^ m^3^ s^−1^ ), according to a sea-surface-temperature-based fingerprint index estimate. Particularly, the Atlantic overturning slowdown causes an oceanic heat transport divergence across the subpolar North Atlantic, which, while partially offset by enhanced ocean heat uptake, results in cooling over the warming hole region.

archived (Wayback Machine)

24
 
 

cross-posted from: https://lemmy.sdf.org/post/35625917

While China touts climate goals and sustainability, its banks are pouring billions into commodities from the world’s rainforests, an investigation by the international NGO Global Witness has found.

Archived

Chinese banks became the largest creditors of “forest-risk” companies globally between 2018-2024 – excluding financial institutions based in Brazil and Indonesia – according to a new analysis by Global Witness, based on data released in September 2024 by the Forests & Finance coalition.

The financial sectors of Brazil, Indonesia and Malaysia provide a disproportionate amount of “forest-risk” financing to commodity producers in their own countries and are excluded from this analysis, which focuses on international financial flows. When including these countries, China ranked third globally overall in 2023, the final year for which full data is available.

The Forests & Finance database, compiled by Dutch research firm Profundo, tracks financial flows to over 300 “forest-risk” companies involved in agricultural supply chains such as beef, palm oil and soy production – industries that are major drivers of tropical deforestation.

Key findings

  • Recent data shows that Chinese banks have become the largest creditors to “forest-risk”* companies, after major producing countries Brazil and Indonesia, with over $23 billion in financing provided from 2018 to 2024.
  • Key Chinese banks, including CITIC, Industrial and Commercial Bank of China and Bank of China, are among the top creditors for “forest-risk” companies such as Royal Golden Eagle Group, which has faced repeated allegations that its supply chain has driven deforestation.
  • The increasing flow of finance to “forest-risk” companies undermines China’s climate and environmental goals under the Glasgow Leaders' Declaration and national Green Finance Guidelines.
  • Meanwhile, Chinese banks rank poorly compared to their international counterparts in terms of deforestation-related policies, with four out of six major Chinese lenders scoring zero in the Forest 500 annual policy assessment.
25
view more: next ›