Articles tagged with Sea Level Rise
A new international study has reconciled measurements of ice sheet changes in Antarctica and Greenland, providing a more consistent estimate of their contribution to sea-level rise. The results show that the planet's two largest ice sheets have been losing ice faster during the past decade, causing widespread concern.
New research suggests that sea levels are rising at a rate of 3.2 mm per year, 60% faster than the IPCC's central projections, based on satellite measurements and analysis of global temperatures and sea-level data over the past two decades.
Sea levels are rising at a rate of 60% faster than the IPCC's latest best estimates, with satellite data recording a rate of 3.2 mm per year compared to projected 2 mm per year. This increase in sea-level rise is likely due to global warming and correlates well with the increase in global temperature.
A CU-Boulder study suggests the iconic Columbia Glacier in Alaska will cease its retreat by 2020, reaching a new stable position 15 miles upstream. This prediction challenges current understanding of sea level rise and highlights the complexities of glacier dynamics.
A future without climate policy would be catastrophic, with coral reefs collapsing and the Greenland ice sheet melting in thousands of years, says a World Bank report. The poorest nations would be hit hardest, with heat waves, sea-level rise, and yield failures becoming the new normal.
A University of Innsbruck team assessed glacier contribution to sea level rise from 1902 to 2009, finding that melting glaciers caused about 11 cm of sea level increase. Glaciers' melt rates were surprisingly constant over time, with brief warm episodes leading to Arctic glacier retreat.
The Geological Society of America has organized a break-out discussion panel to address the devastating effects of Hurricane Sandy on rapid sea-level rise and its impacts. Geoscience experts will discuss the changes caused by the storm to the U.S. East Coast, tying into scheduled presentations on the topic.
Researchers have identified several critical feedback loops that contribute to the rapid increase in sea levels, including Arctic sea ice, Greenland's ice cap, and soil moisture. These positive feedbacks accelerate climate change, making it challenging to predict future sea-level rise.
Researchers at Durham University found that channel width plays a crucial role in controlling ice stability and rate of mass loss from ice sheets and glaciers. The study's simulation of past ice-sheet retreat and collapse over a ten thousand year period in Antarctica provides new light on what makes ice stable or unstable.
A new study predicts that sea levels will continue to rise for thousands of years due to irreversible warming caused by greenhouse gas emissions. The research suggests that the Earth's ice sheets and oceans will contribute significantly to this rise, with a possible increase of up to 6.8 meters in the next thousand years.
A new study finds that the rate of glacier thinning has increased by about half over the last decade in the Southern Patagonian Icefield, contributing to rising sea levels. The icefields have lost enough water to cover the entire US with 2.7 cm of water, with glaciers thinning at an average rate of 1.8 meters per year.
Researchers used GPS to measure short-term changes in Greenland's ice loss, finding a link between ice and atmospheric pressure. The study, published in PNAS, uses the Greenland bedrock as a 'bathroom scale' to weigh ice mass.
Researchers at the University of Bristol used climate and ice sheet models to identify the cause of rapid sea level rise in the past. They found that a process called 'saddle-collapse' led to two major events, including the 14,600-year-old Meltwater pulse 1a event, which resulted in a 9m sea level rise.
A new study projects significant sea-level rise of up to 3.5 metres even at relatively low levels of global warming, highlighting the need for reducing greenhouse-gas emissions. Limiting warming to below 1.5 degrees Celsius could halve sea-level rise by 2300.
Researchers found that secondary effects from sea-level rise can lead to an equal or even higher loss of habitat than primary displacement effects in populated regions. The study projects dramatic impacts on mammal distribution due to human relocation into hinterland areas.
Harvard scientists have developed a method to identify 'sea level fingerprints,' patterns of variation in sea level changes that can indicate the source of water contributing to rising sea levels. Using a Kalman smoother, researchers can determine where glacial melting is occurring and estimate its contribution to global sea level rise.
A new study calculates that groundwater pumping will cause a global sea level rise of about 0.8 millimeters per year by 2050, outweighing the effect of dams. Groundwater depletion rates are projected to increase further, contributing significantly to sea level rise.
Scientists have analyzed the speed of over 200 Greenland outlet glaciers, finding they are moving at a slower rate than previously thought. The study suggests that the rate at which these glaciers can dump ice into the ocean is limited, with a possible contribution of only four inches to sea level rise by 2100.
Researchers developed a novel method to distinguish sea-level fingerprints from various processes, allowing for more accurate estimation of individual ice sheets' contributions to rising global sea levels. The new approach may help estimate the current rate of sea level rise and rates of ice sheet melting simultaneously.
A CU-Boulder study shows that massive releases of meltwater from surface lakes on the Greenland Ice Sheet are causing it to slide faster into the ocean. This could accelerate sea-level rise and have implications for coastal communities.
Researchers found a rapid sea-level rise of ~14m following the onset of the first warm period of deglaciation. Coral samples from Tahiti's reefs provide valuable insights into past sea-level changes and inform climate modeling.
Scientists have discovered that the Earth's crust beneath the Mississippi Delta sinks at a much slower rate than previously assumed. The researchers used sea-level reconstructions from different portions of coastal Louisiana to compare rates of subsidence over time.
Scientists have reevaluated past sea-level rise estimates, finding that the seas rose 20-43 feet higher than today during an extremely warm period 400,000 years ago. This new research helps narrow the range of global sea-level projections for the future, providing a more accurate understanding of potential changes.
New research suggests nearly four million Americans, covering an area larger than Maryland, are at risk of severe flooding due to rising sea levels. The US Government's current flood zones may not be stable with predicted sea level rise, and many locations will experience high flooding every decade or more often.
A study by Duke University researchers predicts that sea level rise will change the economic landscape of Southern California beaches, with smaller beaches facing significant losses while larger ones may benefit. The study suggests that nourishment projects could help offset these losses, but at great cost.
Researchers at UBC created computer visualizations of rising sea levels to illustrate ways to adapt to climate change impacts. The four alternate scenarios show different strategies, including raising dikes, building offshore barrier islands, and reducing vulnerability through design.
Researchers develop computer model to describe forces maintaining mangrove-hammock boundary, indicating large salt pulses may cause mangroves to invade hardwood hammocks. The model predicts changes in vegetation and freshwater supply due to storm surges and sea level rise.
Researchers analyze tension between controlling sea level rise and surface temperature changes using a model with 120 scenarios. Abrupt cooling from sea-level rise mitigation could be more damaging than increasing temperatures, and strategies differ for each goal.
A new study projects a bleak future for San Francisco Bay's tidal marshes under high-end sea-level rise scenarios, with up to 93% of the bay's tidal marshes potentially lost. However, the study also highlights the importance of restoration efforts and sediment management in preserving these vital ecosystems.
A new study predicts that California beach towns will experience significant economic losses due to sea level rise, with visitor hotspots like Venice Beach facing up to $440 million in tourism revenue losses. The study also found that accelerated erosion could cause up to $540 million worth of damage at San Francisco's Ocean Beach.
A recent study found that the rate of sea level rise along the US Atlantic coast is the fastest in 2 millennia, linked to rising global temperatures. The research, conducted by a team of scientists, used microfossils and radiocarbon dating to reconstruct sea levels over the past 2000 years.
A newly constructed, 2,000-year history of sea level elevations will help scientists refine models used to predict climate-change-induced sea level rise. The record shows the past century had the fastest recorded rate of sea level rise.
Researchers have linked the fastest sea-level rise in 2,000 years to increasing global temperatures. The study, published in Proceedings of the National Academy of Sciences, found that sea level rose by more than 2 millimeters per year on average since the late 19th century.
The study reveals that barrier islands cluster along tectonically calm coasts, with stable coasts producing wide, low relief areas conducive to island formation. The rate of sea level rise is critical in shaping island fate, with rapid rise leading to erosion and disappearance.
A new study by Stanford researchers found that most seaports lack a plan to adapt to climate change, threatening their infrastructure. Rising sea levels and frequent violent storms will take a significant toll on ports worldwide.
A new study reveals that the Greenland Ice Sheet experienced its highest melting event in 2010, breaking records by up to 50 days. This unusual phenomenon was attributed to extreme temperatures and reduced snowfall during the summer months, which exposed bare ice earlier than usual.
A major grant award of £3.3 million has been secured by a Southampton-led consortium project to study past and possible future sea-level rise. The researchers aim to obtain a better picture of how much and how quickly sea level may rise as a result of global warming.
Scientists have identified a cluster of deep low-frequency earthquakes along the San Andreas Fault, influenced by a Chilean earthquake. Additionally, satellite imagery reveals evidence of buried water ice near the Martian equator, contradicting previous research that Mars' current climate is inhospitable to equatorial water ice.
Researchers at the Virginia Institute of Marine Science found that absolute sea level in Chesapeake Bay is rising at a rate of about 1.8 millimeters per year, slower than the global average. However, local subsidence rates are significantly higher, adding up to a growing threat of coastal flooding and erosion.
Global coastal wetlands are likely to disappear near the end of the 21st century, with limited sediment supplies and tidal ranges making them vulnerable. Wetlands with higher sediment availability may survive under slow sea-level rise projections.
Sea levels around Falkland Islands rose by 0.75mm/year between 1842 and early 1980s, but accelerated to 2.5mm/year since 1992, consistent with global warming observations
Scientists have found that global groundwater stocks are shrinking at an alarming rate, with the rate of depletion more than doubling between 1960 and 2000. This rapid loss of water could lead to severe consequences for a growing human population, including food insecurity and social unrest.
International research suggests that sea levels will be 30-70 centimeters higher by 2100 even with geo-engineering efforts. However, large-scale actions like sulfur dioxide injections or mirror orbits pose significant challenges. Bioenergy with carbon storage (BECS) appears to be a more desirable option.
A new study by Scripps Institution of Oceanography reveals that floating glaciers produce larger icebergs than grounded cousins and behave erratically. This is the first detailed observation of a glacier transitioning from grounded to floating.
A new study led by University of Colorado at Boulder indicates that rising sea levels in the Indian Ocean are partly caused by human-induced climate warming, threatening coastal areas and islands. The study suggests that the Indo-Pacific warm pool is amplifying regional sea rise changes, with potential far-reaching impacts on global cl...
Scientists from the University of Miami found that Greenland's ice is melting rapidly, causing the land underneath to rise by nearly one inch per year. The study suggests that if current trends continue, this acceleration could lead to a significant increase in global sea level rise.
Scientists have discovered that changes in floating ice are causing sea levels to rise, resulting in a 2.6% increase of global sea levels. The study found that the loss of floating ice amounts to a sea level rise of 49 micrometers per year.
A research team has revised estimates of glacier melt in Alaska, finding that glaciers contribute about one-third less to sea-level rise than previously estimated. The new calculations put the rate of melting at around .0047 inches per year, down from the original estimate of .0067 inches.
Researchers found significant spatial variations in land movement along the US Atlantic coast, with mid-Atlantic regions subsiding twice as much as northern and southern areas. Coastal subsidence enhances sea-level rise, leading to shoreline erosion and loss of wetlands.
A new study confirms the Greenland ice sheet is losing mass at an accelerating rate, primarily driven by accelerated iceberg production and increased surface meltwater. The research suggests this trend is likely to continue in the near future, with significant implications for global sea level rise.
Researchers found that 20th-century sea-level rise in North Carolina is three times higher than the rate of sea-level rise during the last 500 years. The acceleration appears consistent with other studies from the Atlantic coast, suggesting a possible link to human-induced climate change.
Researchers propose diverting sediment-rich water from Mississippi River to create new land, compensating for projected losses and protecting upriver areas. The model predicts creating up to 45% of the anticipated new land area, with enough flow remaining in the main channel for navigation.
Researchers at University of Bristol predict sea level rise will be between 7-82 cm by end of century, similar to IPCC projections. The new model uses fossil coral data and temperature records from ice-core measurements to achieve accurate predictions.
A new record reveals a systematic equilibrium relationship between global temperature and CO2 concentrations and sea-level changes over the last five glacial cycles. This suggests that even stabilisation at today's CO2 levels may commit us to sea-level rise, potentially exceeding long-term projections.
A recent study published in Hydrological Processes reveals that the Greenland ice sheet is a major contributor to sea-level rise, accounting for nearly 25% of global sea-rise in the past 13 years. The study also shows that seas are rising at a rate of over 3 millimeters per year, more than 50% faster than the average for the 20th century.
Research suggests that moderate to high Greenland ice melt rates could drive 4-12 inches of additional water towards heavily populated areas in the northeastern US and Canada, on top of average global sea level rise. This could lead to significant impacts on the northeast US coast by 2100.
New research suggests that moderate to high rates of ice melt from Greenland may shift ocean circulation by about 2100, causing sea levels off the northeast coast of North America to rise by 30-51 centimeters (12-20 inches) more than other coastal areas. This could lead to significant impacts on major northeastern cities.
A new study found that the West Antarctic Ice Sheet's collapse would raise global sea levels by only 3.3 meters, not the previously estimated 5-6 meters, with US coastal areas experiencing a 25% increase in sea level rise, posing significant threats to cities like New York and San Francisco.
Scientists estimate that the collapse of West Antarctica's ice sheet would raise global sea levels by 3.3 meters, not five or six as previously thought. The region's unique below-sea level topography makes it more prone to instability.
Studies investigate the relationship between mantle cooling, crustal thickness, and sea-level rise. Researchers also explore the impact of tectonic stretching on fault formation and the behavior of Earth's plates.