A recent study published in Nature Communications reveals that northern oceans pumped CO2 into the atmosphere during past natural climate changes, contradicting previous assumptions of ocean's role. The research found that areas in Norwegian Sea released more greenhouse gas into the air during severe cooling periods.
The Eurasian ice sheet grew from small ice caps to a massive ice mass, nearly three times the size of modern-day Greenland, through a process driven by climate cycles and snowfall. The sheet's growth had a profound impact on regional climates, creating rain-shadow effects and desert conditions in western Russia and Siberia.
Researchers have precisely dated the evolution of a brittle fault in western Norway, providing insights into methane release from the ocean floor. The study reveals that active methane leakage from the sea floor occurs episodically and frequently, with some seeps activating annually.
The Permian-Triassic extinction event saw 96% of marine species and 70% of terrestrial life die off due to explosive volcanic eruptions in Siberia. The Arctic region reveals clues about the delayed recovery, with evidence of a significant nutrient gap during this period.
Researchers have found strong evidence of sea ice distribution in the Nordic seas over the past 90,000 years, using a marine sediment core. The study reveals that sea ice played a significant role in shaping climate change and ocean currents during this period.
A new study found that Arctic methane seeps have a strong localized influence on benthic organism abundance and diversity. The total biomass at seepage sites was significantly higher than nearby non-seepage sites, but with lower species diversity due to the presence of a few highly tolerant or specially adapted species.
Research from UiT The Arctic University of Norway suggests that methane emissions from the seabed in the Arctic Ocean do not significantly affect the atmosphere. Scientists performed measurements near the seabed, in the ocean and atmosphere, to determine if methane is being released into the air.
Researchers found that methane release from the ocean floor followed ice sheet retreats, but the process occurred over a prolonged period. The study used radiometric dating to determine the timing of the releases, which were too slow to impact atmospheric methane concentrations.
A study suggests that gas hydrates in sediments slowed down an ice stream in the Barents Sea during the last ice age. The sticky spots under the ice act like hook and loop fasteners, creating friction and lubrication that can stop or slow the flow of the ice stream.
A study published in Scientific Reports reveals that a warm ocean surface water prevailed during the last ice age, causing gradual climate changes. The Nordic seas, just south of Iceland, followed an Antarctic pattern of warming and cooling, contradicting previous 'seesaw' hypothesis.
Scientists used clam shells to calculate that methane had persisted for approximately a thousand years at a specific site in the Arctic Ocean. This finding provides insight into the duration of ancient methane seeps and their impact on the environment.
A comprehensive study published in Nature Communications suggests that under the Arctic ice sheet, significant amounts of methane may have been stored as hydrates, releasing climate gas into the ocean and atmosphere for millennia. The findings indicate that modern ice sheets could also contain vast reservoirs of potent greenhouse gas.
CAGE has deployed two methane observatories on the ocean floor in the Arctic Ocean, monitoring methane and CO2 releases, ocean acidification, and circulation. The observatories will collect crucial data for a full year, helping to understand processes related to climate change.
Researchers from UiT The Arctic University of Norway have imaged deep Arctic Ocean methane seeps for the first time using a custom-designed system. The images reveal over 1000 active seep sites at depths of over 1000 m, providing valuable insights into gas hydrate and climate change.
Researchers found that ocean currents strongly affect methane-consuming bacterial populations in Arctic cold seeps, controlling their prevalence and methane consumption rates. Fluctuations in these communities were linked to changes in water temperature and salinity.
Scientists at UiT The Arctic University of Norway have discovered a new source of methane in the Arctic Ocean, abiotic methane formed by chemical reactions in the oceanic crust. This finding challenges previous assumptions about the origin of methane and suggests vast systems of methane hydrate throughout the Arctic.
A team of scientists has found evidence of methane seepage from the Arctic seabed dating back 2.7 million years, tied to tectonic plate movement and potentially influenced by past temperature fluctuations. The study suggests that the release of methane gas hydrates in this region may have contributed to climate change.
Scientists have found significant methane releases at depths of 20-50 meters off the West Yamal Peninsula in Siberia. The findings suggest a smaller, more fragile seal than previously thought, and a continuous thawing process driven by geothermal heat flux.
Scientists have found that the Arctic Ocean's sea ice cover began to form around 2.6 million years ago, with significant expansion occurring around this time. This new knowledge can be used to improve future climate models and predict potential ice-free periods, which could have major implications for the planet's climate system.