Articles tagged with Sea Level Rise
Rising sea levels may cause more frequent and devastating river avulsions, altering the course of rivers to the sea. This shift in river dynamics could lead to costly infrastructure failures and increased flood risks for coastal communities.
Researchers find that San Francisco Bay Area coastal flooding causes region-wide commute disruptions, particularly in areas with sparse road networks. Climate change exacerbates the issue, and measuring road network density is crucial for understanding community resilience to flood-related delays.
A recent satellite survey tracked California's entire coast for over a decade, revealing local hotspots of subsidence in San Francisco, Los Angeles, and Santa Cruz. The study found that these areas will face increased flooding risk as sea levels rise, with rates of subsidence reaching up to 8.7 mm/year.
Sea turtles may experience a 87% decline in critical nesting habitat on Bioko Island by 2100 due to rising sea levels. The study, funded by HESS Equatorial Guinea and Purdue University Fort Wayne, predicts this impact for the beaches of Bioko Island.
A study examines how sea-level rise and subsidence affect river avulsions on deltas, finding that frequent avulsions occur when rates of these processes match sediment supply. Engineered avulsions may help mitigate climate change effects, but thresholds exist where sediment supply cannot keep up with rising sea levels.
Scientists have discovered three ways that deltas can respond to sea level rise, depending on the balance between sediment supply and rate of sea-level change. This understanding has significant implications for climate change and human interference, with potential impacts on river ecosystems and societal stability.
Researchers found that mangroves will likely stop growing vertically and instead encroach inland if sea levels rise above 6mm per year. Mangroves play a crucial role in carbon sequestration and protecting people from flooding, making it essential to adopt coastal management measures to protect these ecosystems.
New research suggests coral reef islands can respond to sea level rise by evolving through natural processes, potentially supporting near-term habitability. Islands composed of gravel material can raise their crest as sea level rises, with additional management challenges involved.
According to the study, mangroves will not survive rising sea levels if global carbon emissions are not reduced. Mangroves can survive with rates of sea-level rise under 5mm per year but will stop growing at this pace if rates exceed 6mm/year.
A new study suggests that mangrove trees will likely disappear by 2050 if greenhouse gas emissions continue to rise, threatening the planet's ability to combat climate change. Mangroves store significant amounts of carbon and protect coastlines, providing habitat for fish and other species.
Ancient sediment analysis reveals mangrove ecosystems can survive up to a 7mm per year sea-level rise threshold. Mangroves provide essential ecosystem services but are threatened by rapid sea-level rise, with current rates expected to surpass the survival limit within 30 years.
A new Tulane University study finds that coastal marshes in the Mississippi Delta are experiencing tipping points, where a small increase in sea-level rise leads to widespread submergence. The researchers predict that most marshes will drown in a few centuries once the rate of sea-level rise exceeds a certain threshold.
New Rutgers research confirms that modern sea-level rise is linked to human activities and not changes in Earth's orbit. Surprisingly, the Earth had nearly ice-free conditions with carbon dioxide levels similar to today.
A study led by Nanyang Technological University warns that global sea-level rise could exceed 1 meter by 2100 and 5 meters by 2300 if emission targets are not met. The study, which surveyed over 100 climate experts, found stark differences in sea-level projections for low versus high emissions.
Researchers found that groundwater inundation is the most extensive flood source, while direct marine inundation is the least. They developed a method to identify vulnerable locations and critical infrastructure likely to fail, emphasizing the need for site-specific consideration.
A new analysis of data from NASA's ICESat-2 and ICESat satellites estimates that polar ice losses from Greenland and Antarctica contributed to 14mm of sea level rise between 2003 and 2019. The study projects that melting ice from these regions will increasingly contribute to sea level rise within tens to hundreds of years.
A new international study developed a novel statistical method to capture the interactions between tides and storm surges. The model found that coastal flooding risks are underestimated, with reductions of up to 17% in people affected and 13% lower costs for US coasts.
A study published in Scientific Reports predicts that extreme coastal flooding events in the US will double every five years if sea levels continue to rise as expected. By 2050, current extreme water levels are projected to transition from 50-year floods to annual events in 70% of US coastal regions.
Scientists have created an equation to predict glacier movement over soft beds, which could improve forecasts of glacier speed and sea-level rise. The new 'slip law' accounts for the motion of ice resting on deformable ground underneath fast-moving parts of ice sheets.
HKU researchers reconstruct water depth changes in Svalbard using fossil Ostracoda, revealing a sudden temperature rise and abrupt sea-level change due to warm Atlantic waters. The study provides the first solid evidence of MWP-1B's relative sea-level change in ice-proximal areas.
A proposed North Sea dam could protect over 25 million Europeans from the consequences of a predicted sea level rise. The estimated cost of building such a dam is between 250-500 billion euros, which is relatively small compared to the potential costs of inaction.
A study found enhanced pre-industrial sea-level rise of about two to three millimeters per year in Nova Scotia, Maine, and Connecticut. The rapid episodes were natural and related to the North Atlantic Oscillation and Arctic ice melt.
A study published in Frontiers reveals China's intertidal wetlands have lost nearly 40% of their area over the past four decades due to anthropogenic development and sea level rise. The loss has significant ecological and economic implications, making conservation a top priority.
The 'Antarctica Factor' study reveals that Antarctic ice-loss is the greatest risk and uncertainty for global sea-levels, with a possible contribution of up to 58 cm within this century. The range of estimates is quite large, from 6-58 cm, but the results are robust due to the large number of ice sheet modeling groups involved.
Research led by the University of Arizona found that the US East and Gulf Coasts have different responses to storm surges due to ocean and atmospheric circulation interactions. The Gulf Coast, particularly New Orleans, is highly sensitive to tropical cyclone characteristics, leading to elevated storm surge heights.
New IIASA-led research assesses economy-wide effects of sea level rise globally, highlighting significant GDP losses without further mitigation and adaptation. The study shows that projections for 2050 and 2100 reveal drastic changes in G20 countries' relative GDP impacts, with China facing the highest losses.
A new study predicts 13 million US residents will be forced to relocate due to rising sea levels by 2100. Cities like Atlanta, Houston and Denver are expected to experience significant population growth, with effects on jobs, housing prices and infrastructure.
Researchers analyzed 101 monthly stream and tide gauge records to estimate variations in relative water level in the Ganges-Brahmaputra-Meghna delta from 1968 to 2012. The study found RWL increased by approximately 3mm/year, similar to global mean sea-level increase, leading to estimated maximum land subsidence rates of 1-7mm/year.
Researchers uncover the oldest known coastal defence system built by ancient settlers to protect against rising oceans. The ancient Tel Hreiz seawall in Israel was a temporary reprieve from sea level rise, abandoned and inundated over time.
Researchers found three distinct phases of reef growth since end of Pleistocene era, including periods of slower, deeper growth due to increased sediment and nutrient flux. The study provides a new model of reef growth that suggests the more protected parts of the reef might have been suitable for early coral development.
A new modeling approach can help researchers, policymakers and the public better understand how policy decisions will influence human migration as sea levels rise. The approach suggests that global policy decisions about greenhouse gas emissions and coastal policies will determine whether people need to migrate and where they may go.
Researchers are studying ice loss on Greenland's Helheim glacier to better predict sea-level rise. The four-year project brings together experts in geology, atmospheric science, and oceanography to investigate the complex processes driving glacier melting.
Civil engineers create a sustainability-based optimization algorithm to help policymakers make informed decisions on projects like bridges, school roofs and waterfront developments. The algorithm considers the costs of a project over its lifetime and externalized costs, providing a more comprehensive view.
Researchers estimate that greenhouse gas emissions up to 2030 will contribute approximately 1m of sea-level rise by 2300, with the top 5 emitters responsible for around 25% of this increase. Stringent near-term emission reductions are necessary to limit long-term sea-level rise
A new study finds that sea levels will rise by 20 centimeters by 2300 even if current carbon emissions pledges are met. The increase is attributed to global warming, which takes longer to respond than immediate temperature increases.
A new study warns that current Paris Agreement pledges would cause 20 cm of sea-level rise by 2300, with just five countries - China, USA, EU, India, and Russia - responsible for half the impact. To avoid this, governments must significantly scale up emission reduction efforts.
Researchers found that even the tallest ice cliffs will support their own weight rather than collapsing catastrophically, with slower ice shelf removal leading to slow sloughing away. This challenges previous predictions of rapid sea-level rise from Antarctica.
Researchers are investigating strategies to mitigate coastal flooding in Santa Monica Bay and Humboldt Bay using natural and nature-based features, as well as artificial structures. The study aims to understand the effectiveness of these approaches in controlling local flood hazards and improving quality of life for nearby communities.
A new Stanford study found that expressing uncertainty about climate change predictions increases public trust in scientists, but acknowledging unknown factors can undermine credibility. When climate scientists include best-case and worst-case scenarios, Americans are more trusting and accepting of their statements.
A new study by Duke University and Fudan University suggests that local conservation efforts can significantly buffer the impacts of climate change, buying cities time to adapt. Local interventions have promoted coral recovery in Florida Keys and restored seagrass beds in Chesapeake Bay.
A UMass Amherst climate scientist is contributing to the Intergovernmental Panel on Climate Change's (IPCC) Special Report on the Ocean and Cryosphere in a Changing Climate. The report assesses the latest scientific knowledge on sea-level rise, ocean changes, and their impacts on coastal communities.
A USF-led team studied geological formations in a coastal cave to understand past sea level rise. They found that 3-4 million years ago, global mean sea level was 16 meters higher than present, with potential implications for current-day sea level rise.
A team of scientists discovered geologic evidence in a Mallorcan cave showing sea levels were 16 meters higher than present day 4 million years ago. The findings provide insights into past global sea level rise and implications for predicting current-day rise amid a warming climate.
Researchers at Princeton University have created new maps that predict coastal flooding for every county on the Eastern and Gulf Coasts. The study finds that 100-year floods could become annual occurrences in Northern coastal towns, primarily due to sea level rise. In more southern latitudes, storms are expected to increase in strength...
Managed retreat can achieve societal goals like community revitalization, equity, and sustainability. However, barriers include financial constraints and psychological issues, which must be addressed through strategic planning and social programs. Implementing equitable relocation policies is crucial to ensure the most vulnerable house...
Researchers at Rutgers University and the University of Oregon develop a new approach to measure submarine melt, revealing tidewater glaciers are retreating faster than expected. This finding could significantly enhance forecasting of climate-driven sea level changes.
Researchers have developed a new method to measure submarine melt rates, revealing that current theoretical models may be underestimating glacial melt by a significant margin. The study's findings could lead to improved forecasting of climate-driven sea level rise.
Researchers at USF have discovered a process that can control glacier calving in Greenland, which is crucial for modeling sea level rise. The team found that a 'mélange' wedge of sea ice and icebergs can 'hold the door' and prevent glaciers from calving.
Research reveals that stronger waves due to sea level rise can hamper plant re-establishment on neighboring tidal flats, slowing down or blocking recovery. Effective management of tidal flats is crucial for preserving salt marshes' resilience to wave attacks.
Large ensembles of Antarctic ice sheet simulations show increased uncertainty in sea level projections. Marine ice sheet instability amplifies and skews uncertainty in projected sea level rise.
A study by Georgia Institute of Technology researchers suggests that instability within Antarctic ice will accelerate its flow into the ocean and push sea levels up at a more rapid pace than previously expected. This 'instability' makes forecasting more uncertain, particularly relevant to engineering against flood dangers.
Researchers collected continuous time series of water temperatures near glaciers in Svalbard, revealing subsurface temperatures exert the greatest influence on mass loss. The study provides valuable data to improve numerical models estimating future sea level rise.
Clouds play a crucial role in projecting future Greenland ice sheet melt, with high emission scenarios showing the most significant uncertainty. The study found that clouds can increase or decrease sea level rise by up to 11 cm within the next thousand years.
A new study predicts that Greenland's ice sheet could lose up to 25% of its ice by 3000, contributing up to 6.5 feet of sea level rise if greenhouse gas emissions are cut significantly.
A new modeling study published in Science Advances predicts that melting at the present rate could contribute 19-63 inches of global sea level rise, exceeding previous estimates of up to 35 inches. The study's updated model accurately represents outlet glacier flow and shows that limiting emissions could limit ice loss to 8-25 percent.
A new study published by Woods Hole Oceanographic Institution found that major currents in the North Atlantic do not directly cause changes in sea levels along the New England coast. Instead, both are controlled by variability in weather patterns over the North Atlantic, such as the North Atlantic Oscillation.
A Rutgers University study found that warming ocean temperatures in the western tropical Pacific influence weather patterns around West Antarctica, leading to increased thunderstorms and rainfall. This could impact the stability of the West Antarctic Ice Sheet and global sea-level rise.
A comprehensive review of global-scale glacier models reveals that smaller glaciers worldwide are projected to lose significant mass by 2100. This could lead to almost 10 inches of sea level rise globally, surpassing the impact of ice sheets in Greenland and Antarctica.
Researchers used structured expert judgment to estimate probability distributions for future sea level rise, yielding long upper tails and a small but meaningful chance of exceeding 2m by 2100. The results suggest coastal communities should consider the possibility of 21st-century SLR in excess of 2m when developing adaptation strategies.
An international team of scientists used structured expert judgment to estimate plausible ranges for future sea level rise from melting ice sheets. Their findings suggest that coastal communities should not rule out the possibility of 21st-century SLR in excess of two metres when developing adaptation strategies.