Articles tagged with Polar Ice Caps
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Scientists at the University of East Anglia used an autonomous underwater vehicle to survey beneath the Dotson Ice Shelf, finding that the shape of the seabed is more important than current speed in influencing warm water circulation. This leads to melting at the underside of the ice shelf, contributing to sea level rise.
Researchers at Penn State developed a tool to analyze seismic activities linked to Arctic sea ice movements, providing insights into ice characteristics and interactions. The new approach can help coastal communities assess threats from drifting sea ice, such as erosion and wave creation.
A new study on Mars crater deposits reveals the planet went through repeated ice ages driven by shifts in its axial tilt, resulting in a gradual drying of the planet. The study provides insights that can be applied to Earth's changing environment and helps identify safe regions for future missions.
Researchers discovered that Arctic diatoms can move and glide through ice at temperatures as low as -15 C, using a unique mucilage rope mechanism. This finding has significant implications for our understanding of adaptation to a changing polar environment and potential roles in the food chain.
The Arctic Challenge for Sustainability II research program has led to a cross-disciplinary study on sustainable development in the Arctic for Indigenous peoples. The goal is to improve health, well-being, and security of Arctic communities while conserving ecosystem structures and resources.
Researchers in Svalbard encounter exceptionally high temperatures, widespread snowmelt, and blooming vegetation, challenging the long-held assumption of a reliably frozen Arctic winter. This finds underscores the transformative impact on physical environment, local ecosystems, and scientific research methodology.
Researchers found evidence that the Asian continent was free of permafrost when Earth's average temperature was 4.5˚C warmer than today. The study suggests that a 4.5˚C rise in global temperatures would release up to 130 billion tonnes of carbon currently frozen in the ground.
Researchers from Kyushu University found that climate models significantly overestimate the fraction of ice in wintertime Arctic clouds, leading to skewed warming predictions. This error has significant implications for current and future global warming projections.
Researchers find watercourse meeting sub-ice-shelf ocean cavity up close, with temperature and salinity analysis revealing it's a calm body of water primarily fed by sea. The study also reveals that the watercourse fluctuates greatly over time, with flood events occurring approximately every ten years.
A new study by Ohio State University researchers has detected lead pollution in ice cores from the Guliya ice cap in northwestern Tibet, revealing a significant change in its origin beginning in 1974. This shift was likely caused by stricter emissions policies implemented in the US during that time period.
A groundbreaking study led by Virginia Tech provides the first direct geochemical evidence of a massive, rapid melting period on Earth after the last global ice age. The researchers analyzed lithium isotopes in carbonate rocks formed during this time and found strong evidence for freshwater meltwater interacting with the ocean.
A Dartmouth-led study found that air pollution from fossil fuels reaches the remote Arctic, altering its fundamental atmospheric chemistry. The researchers detected declines in methanesulfonic acid, a biomarker linked to phytoplankton productivity, which plummeted in environments high in emissions.
A Dartmouth-led study projects that Antarctica's glaciers will rapidly retreat and potentially collapse by 2200, increasing global sea levels by up to 5.5 feet by 2300. The researchers used 16 ice-sheet models to refine the projection of ice loss over the next 300 years.
A new study led by Dartmouth researchers questions the rapid polar ice collapse model used in the IPCC's sixth assessment report. The team found that the expected rate of retreat is significantly lower than predicted, making the worst-case scenario less likely, but still dire due to ongoing ice loss from Greenland and Antarctica.
The loss is attributed to warming ocean temperatures causing glaciers' floating extensions to melt. This weakening could lead to accelerated sea-level rise as the ice shelves act as frozen dams regulating ice discharge into the ocean.
A study published in Nature Geoscience found that blowing snow produces fine sea salt aerosols, increasing particle concentration and cloud formation in the central Arctic. These aerosols contribute to Arctic warming by trapping surface long-wave radiation, boosting temperatures.
New research reveals that shrinking Arctic glaciers are exposing groundwater springs releasing large amounts of methane, a potent greenhouse gas. Methane emissions from glacial groundwater springs across Svalbard could exceed 2,000 tonnes per year, posing significant threat to global warming.
A new study reveals that glaciers in Greenland move through a complex system involving basal temperate ice and varied landscapes. The research uses computer modeling to better understand the movement of the world's second-largest ice sheet, which could lead to more accurate predictions of sea-level rise.
A new model reveals that warmer Arctic Ocean evaporation transports moisture south, leading to increased snowfall in northern Eurasia. The study sheds light on the mechanism of this phenomenon and its impact on severe weather events.
Scientists have observed distinct seasonal movements in the flow of land-based ice draining into George VI Ice Shelf on the Antarctic Peninsula, with glaciers speeding up by approximately 15% during the Antarctic summer. This finding suggests that similar seasonal variability may exist at other vulnerable sites in Antarctica, potential...
A team of researchers has found new evidence for the presence of liquid water beneath Mars' south polar ice cap using spacecraft laser-altimeter measurements and computer model predictions. The findings agree with earlier radar data interpretations and provide independent confirmation of the existence of subglacial liquid water.
A new volcanic modeling study found that ice-capped volcanoes like Westdahl Peak are delayed in eruption by approximately seven years due to the added pressure from glacial ice. This increase in time may seem insignificant on a geologic scale, but it's significant on the human time scale.
A team of researchers led by Purdue University's Michael Sori found that smaller Martian ice deposits hold key evidence for the planet's orbit and axial tilt's impact on its climate. The study used NASA's HiRISE camera images to analyze layer shapes in an ice deposit, providing insights into Mars' climate history.
A new study on Mars' ice deposits provides insight into the planet's past climate, matching layers to Martian orbital dynamics with unprecedented resolution. The findings help scientists understand Mars' climate history and identify potential periods of habitability.
A study by University of Zurich researchers reveals Arctic warming causes temperature anomalies and cold damage thousands of kilometers away in East Asia, leading to reduced vegetation growth and smaller harvests. The warmer Arctic winters also trigger extreme winter weather events in the region.
A study reconstructed ocean warming history in the Arctic Ocean, finding it began rapidly warming at the start of the 20th century due to Atlantification from the Atlantic Ocean. This warming has led to sea ice retreat and salinity increases.
Researchers observe a high-speed ice feature forming on a Russian glacier, which could indicate the transition from a glacial surge to an ice stream. The study suggests this phenomenon may be more common than previously thought and could impact predictions for global sea level rise.
Researchers at Cornell University have discovered a new ice river forming on the Vavilov ice cap in Siberia, shedding nearly 11% of its mass since 2013. The rapid ice loss is believed to be linked to climate change, which can cause unstable ice shelves and erosion by warm water.
Radiocarbon dating reveals ancient plants preserved on Baffin Island have been covered by ice for at least 40,000 years. The findings suggest the region may be experiencing its warmest century in 115,000 years.
A new study found that melting glaciers and ice caps on Canadian Arctic islands play a significant role in sea level rise. The region lost an average of 7 cubic miles of water per year, increasing dramatically to 22 cubic miles during the latter part of the study.
The Baffin Island ice caps have shrunk by more than 50 percent in the last half century due to warming. The study found that these ice caps will be gone in 50 years or less if no additional warming occurs.
Researchers found that heating and cooling alone can create spiral patterns on Mars, contrary to previous theories. The model suggests that differential melting and refreezing cause the spirals' unique shape and spacing.
Antarctica's Weddell Polynya forms due to a horizontal cyclonic eddy spinning off Maud Rise, affecting global ocean circulation and carbon cycle. The study aims to improve understanding of natural mechanisms driving polar ice cap changes.