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Climate change and climate prediction. Read science articles on regional climates and global climate shifts. Updated daily.
Updated: 21 min 34 sec ago

Nuclear war could trigger big El Niño and decrease seafood

Mon, 01/25/2021 - 16:43
A nuclear war could trigger an unprecedented El Niño-like warming episode in the equatorial Pacific Ocean, slashing algal populations by 40 percent and likely lowering the fish catch, according to a new study. The research shows that turning to the oceans for food if land-based farming fails after a nuclear war is unlikely to be a successful strategy - at least in the equatorial Pacific.

Wet and wild: There's lots of water in the world's most explosive volcano

Sat, 01/23/2021 - 16:10
Conditions inside the Shiveluch volcano include roughly 10%-14% water by weight (wt%), according to new research. Most volcanoes have less than 1% water. For subduction zone volcanoes, the average is usually 4%, rarely exceeding 8 wt%, which is considered superhydrous.

Climate and carbon cycle trends of the past 50 million years reconciled

Fri, 01/22/2021 - 21:06
Oceanographers fully reconciled climate and carbon cycle trends of the past 50 million years -- solving a controversy debated in the scientific literature for decades.

Tiny particles that seed clouds can form from trace gases over open sea

Fri, 01/22/2021 - 21:06
New results from an atmospheric study over the Eastern North Atlantic reveal that tiny aerosol particles that seed the formation of clouds can form out of next to nothingness over the open ocean. The findings will improve how aerosols and clouds are represented in models that describe Earth's climate so scientists can understand how the particles -- and the processes that control them -- might have affected the planet's past and present, and make better predictions about the future.

Shift in caribou movements may be tied to human activity

Fri, 01/22/2021 - 18:22
Human activities might have shifted the movement of caribou in and near the Arctic National Wildlife Refuge, according to scientists who tracked them using isotopic analysis from shed antlers. The study is timely given the auction this year of oil and gas leases in the Arctic National Wildlife Refuge. Indigenous Alaskans opposed the leases, arguing development could disrupt the migration of caribou they depend on for sustenance.

A large number of gray whales are starving and dying in the eastern North Pacific

Fri, 01/22/2021 - 17:16
It is now the third year that gray whales have been found in very poor condition or dead in large numbers along the west coast of Mexico, USA and Canada, and scientist have raised their concerns. An international study suggests that starvation is contributing to these mortalities.

Geoscientists reconstruct 6.5 million years of sea level stands in the Western Mediterranean

Fri, 01/22/2021 - 15:50
The geological features in caves from Mallorca provide scientific insights for understanding modern-day sea level changes.

Role of dams in reducing global flood exposure under climate change

Fri, 01/22/2021 - 15:49
New research exposes the role of dams for mitigating flood risk under climate change. Flood is amongst the costliest natural disasters. Globally, flood risk is projected to increase in the future, driven by climate change and population growth. The role of dams in flood mitigation, previously unaccounted for, was found to decrease by approximately 15% the number of people globally exposed to historical once-in-100-year floods, downstream of dams during the 21st century.

Rocks show Mars once felt like Iceland

Thu, 01/21/2021 - 20:19
A comparison of chemical and climate weathering of sedimentary rock in Mars' Gale Crater indicate the region's mean temperature billions of years ago was akin to current conditions on Iceland.

Tree rings and the Laki volcano eruption: A closer look at climate

Thu, 01/21/2021 - 20:19
When Iceland's Laki volcano erupted in 1783, its effects rippled around the world. Researchers have analyzed Alaskan tree rings to understand how climate responded in northwestern North America. The work will aid in fine-tuning future climate models.

World's largest lakes reveal climate change trends

Thu, 01/21/2021 - 20:19
Sixteen years of remote sensing data reveals that in Earth's largest freshwater lakes, climate change influences carbon fixation trends.

Antarctica: The ocean cools at the surface but warms up at depth

Thu, 01/21/2021 - 20:18
Scientists have concluded that the slight cooling observed at the surface of the Southern Ocean hides a rapid and marked warming of the waters, to a depth of up to 800 meters. These results were obtained thanks to unique data acquired over the past 25 years.

Scientists discover how the potentially oldest coral reefs in the Mediterranean developed

Thu, 01/21/2021 - 20:17
A new study brings unprecedented insights into the environmental constraints and climatic events that controlled the formation of the potentially oldest coral reefs in the Mediterranean.

Diamonds need voltage

Thu, 01/21/2021 - 20:17
Diamonds are fascinating - as jewellery but also because of the extreme hardness of the material. How exactly this variant of carbon is formed deep underground and under extremely high pressures and temperatures remains a mystery. Now, researchers have documented a new influencing factor in theory and experiment.

Climate change puts hundreds of coastal airports at risk of flooding

Thu, 01/21/2021 - 20:17
Scientists have found that 269 airports are at risk of coastal flooding now. A temperature rise of 2C - consistent with the Paris Agreement - would lead to 100 airports being below mean sea level and 364 airports at risk of flooding. If global mean temperature rise exceeds this then as many as 572 airports will be at risk by 2100, leading to major disruptions without appropriate adaptation.

Climate-related species extinction possibly mitigated by newly discovered effect

Thu, 01/21/2021 - 20:08
Changes in climate that occur over short periods of time influence biodiversity. For a realistic assessment of these effects, it is necessary to also consider previous temperature trends going far back into Earth's history.

Methane emissions from abandoned oil and gas wells underestimated

Thu, 01/21/2021 - 16:28
A recent study finds that annual methane emissions from abandoned oil and gas (AOG) wells in Canada and the US have been greatly underestimated - by as much as 150% in Canada, and by 20% in the US. Indeed, the research suggests that methane gas emissions from AOG wells are currently the 10th and 11th largest sources of anthropogenic methane emission in the US and Canada, respectively.

As oceans warm, large fish struggle

Thu, 01/21/2021 - 16:13
Warming ocean waters could reduce the ability of fish, especially large ones, to extract the oxygen they need from their environment. Animals require oxygen to generate energy for movement, growth and reproduction. Researchers describe their newly developed model to determine how water temperature, oxygen availability, body size and activity affect metabolic demand for oxygen in fish.

New eco-friendly way to make ammonia could be boon for agriculture, hydrogen economy

Thu, 01/21/2021 - 16:13
Ammonia has sustained humanity since the early 20th century, but its production leaves a huge carbon footprint. Now researchers have found a way to make it 100 per cent renewable.

Late rainy season reliably predicts drought in regions prone to food insecurity

Wed, 01/20/2021 - 22:10
The onset date of the yearly rainy season reliably predicts if seasonal drought will occur in parts of Sub-Saharan Africa that are particularly vulnerable to food insecurity, and could help to mitigate its effects.