Articles tagged with Sea Level Rise
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A Harvard University study reveals that global sea level has accelerated far more than initially thought, with a 30% increase in sea level rise from 1900-1990 compared to previous estimates. The researchers used a new approach to estimate sea level change by accounting for the limitations of existing tide gauge records.
A new NOAA study projects that most US coastal areas will face 30 or more days of flooding each year, up to 2 feet above high tides, by 2050. The study identifies 'tipping points' where local sea levels rise more than global projections, causing regions like Louisiana and the Gulf Coast to experience near-daily nuisance flooding.
Laboratory experiments by Iowa State University glaciologists found that glacier beds can grow more slippery as the ice slides faster. This effect can improve predictions of future sea-level rise and ice volume loss. The results challenge traditional mathematical models, which had predicted the opposite relationship.
A new study found that global sea levels rose at rates of up to 5.5 meters per century at the end of each of the last five ice-age cycles. The research provides a detailed record of sea-level variability over 500,000 years.
Coastal regions face both climate-driven and non-climatic changes, requiring an integrated approach to management. Long-term adaptation can reduce impacts, but further research is needed to understand which areas can adapt and which cannot.
A new study suggests Antarctica's ice sheet could become the largest contributor to global sea level rise earlier than thought. The analysis indicates a range of potential increases of 1-37 centimeters in this century, significantly higher than previous IPCC projections. This could have devastating impacts on coastal cities and communi...
A new NOAA study finds nuisance flooding is increasing on all three US coasts, with major increases in cities like Annapolis and Baltimore. Rising sea levels, land subsidence, and lost natural barriers are causing more frequent and severe flooding, especially during high tides.
A new study led by Old Dominion University and the University of Colorado Boulder found sea levels are rising in the tropical Pacific off the coasts of the Philippines and northeastern Australia. The research team estimated that areas near these regions are being raised by about 1 centimeter per year due to anthropogenic warming.
New research reveals that changes in Antarctic winds may accelerate global sea level rise by up to 4°C warmer water temperatures near ice shelves. This could lead to a massive increase in the rate of ice sheet melt, with direct consequences for global sea levels.
A new study reveals that a warming period over 400,000 years ago caused the Greenland ice sheet to deglace and raise global sea levels by 4-6 meters. The research uses sediment core analysis to track the chemistry of glacial stream sediments, providing insights into the history of ice sheets in Greenland.
A new study reveals that the Antarctic ice sheet is less stable than previously thought, with massive iceberg calving events causing rapid global sea level rise. The findings, published in Nature, provide direct evidence of the impact of Antarctic ice sheet instability on climate and sea levels.
Researchers have developed a new method to analyze sea level records, revealing substantial evidence for global and regional sea level acceleration. By 2020-2030, there will be statistical certainty of what the sea level rise situation will look like for the end of the century.
A study published in Nature Climate Change suggests that East Antarctica's ice sheet could trigger a persistent ice discharge into the ocean, resulting in a long-term sea-level rise of 300-400 centimeters. This could lead to catastrophic consequences for coastal cities worldwide.
Researchers predict that Miami sea levels will rise by .3 meters to 1 meter by 2100, with areas experiencing constant flooding and mangrove loss. Long-term predictions could be available as early as 2020, providing 70 years of planning for coastal regions.
Researchers found that the northeast Greenland ice sheet is no longer stable and contributing to global sea level rise. The ice stream's retreat accelerated by 20 kilometers over the last decade, suggesting a positive feedback mechanism that could increase future sea level rise.
A new study by Ben Marzeion and Anders Levermann finds that global warming will put 136 cultural monuments at risk, including historical cities like Bruges, Naples, and Istanbul. Sea-level rise will impact not only coastal areas but also regions currently populated by millions of people, leading to the loss of culture and heritage.
The study found that seven per cent of the current global population would be living on land that would be below sea level if temperatures increased above pre-industrial levels by 3°C in the next 2000 years. The impact on cultural heritage sites, including iconic landmarks like the Statue of Liberty and Sydney Opera House, is severe.
A new study suggests that Antarctica's ice shelves are at risk of collapsing due to global warming. The disappearance of the snow layer on top of the ice shelves could lead to a rapid increase in sea levels. Researchers warn that urgent action is needed to reduce greenhouse gas emissions and mitigate this threat.
Researchers used geological evidence to derive a natural background pattern of sea-level rise. Based on this, they found that modern sea-level rise is fast but within the 'natural range', with only half of observed changes expected by natural standards.
Scientists predict a 1.5-3.5 foot sea-level rise in New Jersey by 2050 and 2100, exceeding previous flood records, including Superstorm Sandy. This increase is attributed to global average sea-level rise, sediment compaction, and changes in ocean dynamics.
A review paper highlights how human structures like dams and seawalls are hindering coastal wetlands' natural defense mechanisms. Wetlands can build up their soils to outpace sea level rise through various responses, but human activities are disrupting these processes.
A new review finds that sea level rise and shoreline retreat are the two most certain factors expected to increase future flood risk from tropical cyclones. Accelerated sea level rise will significantly intensify flooding by these storms.
Researchers say sea-level rise will become the dominant driver of flooding and coastal damage, even if storm activity changes. The study suggests a holistic approach to manage coastal systems to mitigate this threat.
A team of 90 international experts expect a sea-level rise of 40-60 centimeters by 2100 and 60-100 centimeters by 2300 under strong emissions reductions. However, unmitigated emissions scenarios predict a high-end value of 1.5 meters or more by 2100 and 4.0 meters or higher by 2300.
Scientists have gained new insight into how glacier movement is affected by melting ice in summer, enabling more accurate predictions of sea level rise. The study found that fast summer ice flow caused by significant melting is cancelled out by slower motion the following winter.
Research predicts that climate change will lead to the immersion of large proportions of islands, wiping out self-contained ecosystems and their inhabitants. The study highlights the importance of prioritizing island conservation in light of sea level rise.
A new study from the University of Exeter and international collaborators finds that smaller reefs with nearly full lagoons have potential for new island development. This could provide alternative land options in the region as sea levels rise.
Researchers found that ocean warming is melting the Pine Island Glacier's floating ice shelf, causing rapid movement of glaciers in Antarctica. This process can lead to increased sea level rise as more ice is added to the mass of Antarctic glaciers.
Researchers use airborne radar data to uncover a 750km-long, meandering river channel beneath the Greenland Ice Sheet. The canyon is thought to predate the ice sheet and played a crucial role in transporting sub-glacial meltwater into the Arctic Ocean.
A study from the University of Hawaii – SOEST found that sea-level rise is a primary driver of shoreline change in Hawaii, with historical rates of erosion being about two orders of magnitude greater than SLR. The research highlights the importance of targeting SLR impacts in coastal zone decision-making and planning.
Computer modeling reveals that melt-water lubrication will contribute only 8mm to sea-level rise by 2200, less than 5% of total projected contribution from Greenland ice sheet. Melting water can actually lead to a lowering of sea-level in some cases.
The National Estuarine Research Reserve System faces increasing climate-related stressors, threatening coastal ecosystems and human communities. Climate sensitivity was highest in southern East Coast reserves, which provide ideal locations to assess climate change impacts.
Researchers have developed a new model that simulates the calving process of icebergs, predicting areas at risk of rapid disintegration due to climate change. The model suggests that stretches of ice on Antarctica and Greenland are vulnerable to catastrophic collapse, potentially exacerbating sea level rise over the next 100 years.
Two species of small beach critters, cousins of the roly-poly, are suffering localized extinctions in Southern California. Their disappearance suggests a looming threat to similar sand-dwelling animals across the state and world. The research highlights the impact of development, climate change, and sea level rise on these ecosystems.
A new study by Stanford researchers maps the entire US coastline, revealing where and how much protection communities get from natural habitats such as dunes, reefs, sea grasses, and mangroves. The study suggests that intact ecosystems near vulnerable coastal communities can reduce losses from sea level rise and storms.
A new study finds that global sea levels could rise by more than 2 meters due to the melting of Greenland and Antarctic ice sheets. The research suggests that Antarctica will contribute half of this rise, while Greenland will add another quarter.
A new study estimates that global sea levels will rise 2.3 meters over the next several thousand years for every degree Celsius the planet warms. The four major contributors to sea-level rise on a global scale are melting of glaciers, Greenland ice sheet, Antarctic ice sheet, and ocean expansion as it warms.
The study highlights the need for continuous satellite monitoring to better predict melting and sea-level rise. The ice sheets covering Antarctica and Greenland contain 99.5% of the Earth's glacier ice, with a potential raise of 63m if melted completely.
The study found that Greenland's ice sheets are losing significant amounts of ice at a rate of about 300 billion tons per year. The accelerated loss of ice mass is attributed to both anthropogenic warming and natural processes such as variations in snowfall and ocean currents.
A new study suggests that the Greenland ice sheet's contribution to sea-level rise will continue to increase as surface melting becomes more significant. This change is driven by the rapid retreat of outlet glaciers and strong warming-induced surface melting, which removes ice before it can reach the marine margin.
A new study led by the University of Pennsylvania reveals that the New Jersey coast has experienced a 10,000-year record of continuous sea-level rise, with varying rates of increase over time. The research suggests that climate change may trigger catastrophic melting of ice sheets, leading to higher rates of sea-level rise and increasi...
Researchers from Syracuse University argue that the Earth's mantle plays a significant role in shaping the coastline and estimating long-term sea-level rise. The team's findings suggest that the shoreline has been uplifted by over 210 feet, indicating less ice melting than expected.
A new study reveals that glacier melting is responsible for about one-third of the observed sea-level rise, with other factors like ice sheets and thermal expansion contributing equally. The research used satellite data from NASA's ICESat and GRACE missions to calculate glacier mass changes globally.
A new study using NASA satellite data found that glaciers outside of Greenland and Antarctica lost an average of 571 trillion pounds of mass every year, contributing to a 0.03-inch-per-year rise in sea levels. This is equal to about 30% of the total observed global sea level rise during the same period.
A new study models iceberg production by Greenland glaciers, finding that fjord shape and terrain below the ice significantly affect their movement. The research suggests that climate change will lead to an average loss of 30-47Gt of ice from these glaciers over the 21st century.
New research indicates that reducing emissions of black carbon, methane, and other pollutants can significantly slow sea level rise. The study found that cuts in these four heat-trapping pollutants could temporarily forestall the rate of sea level rise by roughly 25 to 50 percent.
New research shows that reducing emissions of short-lived pollutants like methane, tropospheric ozone, and hydrofluorocarbons can temporarily forestall the rate of sea level rise. This could lower the threat to coastal cities by stabilizing carbon dioxide concentrations in the atmosphere.
A new study finds that sea level rise will lead to significant habitat loss and threaten the survival of endemic species in Southeast Asian and Pacific islands. The researchers predict that even a one-meter sea level rise could result in the loss of up to 14.7% of all islands in the region.
Researchers from Princeton University have developed a novel framework to project the mass balance of the Antarctic ice sheet, incorporating uncertainty and expert judgments. This approach provides a comprehensive baseline that can be improved over time, offering a more informative projection of future sea levels.
The study reveals that peripheral glaciers in Greenland are losing mass at a rate of up to 50 Gigatons per year, contributing to around 15-20% of sea-level rise. This is higher than expected and more significant than the ice sheet alone.
Research predicts 20% of Canadian Arctic glaciers will melt by end of century, causing irreparable ice loss and sea-level rise. The study's results show that climate change reinforces warming, making it highly likely that glaciers will melt at alarming rate.
A new study projects that global sea-level rise will not be uniform, with certain regions experiencing higher rates of rise. The team used sophisticated computer modeling to show how ice loss from glaciers and ice sheets will impact regional sea levels, particularly in the Equatorial Pacific Ocean.
Recent AGU journal publications explore the global climatology of explosive cyclones and their impact on U.S. biomes under climate change. A study found that extreme precipitation patterns decrease vegetative productivity by 20% in some regions, while others show neutral or negative effects.
Researchers used structured expert elicitation to assess future sea level rise from ice sheets, predicting a 29cm median estimate by 2100. The study's findings suggest a conceivable risk of a rise of greater than 1m by 2100, with uncertainties surrounding the cause of recent ice sheet mass loss.
New study finds Western Antarctica warming at three times the global average, with potential for catastrophic consequences on sea levels. The region's ice shelves are vulnerable to melting, contributing significantly to sea level rise.
A new study reveals nearly twice as much warming in West Antarctica than previously thought, with average annual temperature rising by 4.3 degrees Fahrenheit since 1958. This warming trend could upset the surface mass balance of the ice sheet, contributing to sea level rise.
Researchers used numerical dating to test the sequence stratigraphy model, validating its predictions and improving understanding of long-term climate changes and extinction events. The findings also provide insights into human-induced changes in ecosystems that predate the Anthropocene Epoch.
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.
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.
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.