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Sea-level Rise

This category contains 24 posts

Tide records could have underestimated global sea level rise

New analysis of 100 years of sea level measurements from tide gauges show that we might be underestimating the global rate of sea level rise.

New Model Evaluates How Coastlines in the Northeast United States Respond to Sea Level Rise

Some coastlines are more resilient to sea level rise, whereas others just plain drown. A new study by geologists at the United States Geological Survey evaluate how coastlines along the northeast United States will respond to sea level rise.

Watermelon snow – Colorful algae speed up the melting of glaciers

Red snow algae can form massive blooms on ice sheets every summer as the snow starts to melt. But their pigments don’t just have a colorful effect – they also cause the ice sheet to melt faster.

Human Activity Far More Responsible For Rising Seas Since The Mid 20th Century

New research reports a change in the primary driver of global sea level rise. Natural climate influences on sea level rise are no longer at fault, and haven’t been since the middle of the 20th century.

Antarctic ice dams at risk

Source: Fürst et al. (2016), The Safety band of Antarctic ice shelves. Nature Climate Change The shrinking Antarctic As our planet warms, the melting of glaciers and polar ice caps is causing sea level rise, threatening the future of coastal cities and low lying areas around the world. This melting includes Antarctica’s ice shelves, which add […]

The Down, Up, and Down Again of Chesapeake Bay

The Chesapeake Bay region is a densely populated area, and also experiences more rapid sea level rise than anywhere else along the North American Atlantic Coast. Why? Scientists look to the lithosphere for answers, finding that the subsidence of an ancient lithospheric bulge may be partially to blame, and will continue for millennia.

Retreat! Barrier Beaches Meet Their Demise Despite Modest Sea Level Rise

Future sea level rise poses many challenges for communities on barrier islands. However, sea level rise alone may not be the only factor that determines the fate of barrier islands in a future of rising seas.

Feeling the heat: how do plankton respond to glacial melting?

The current, and sometimes rapid melting of glaciers and ice sheets is a direct consequence of climate change. Glacial melting on land can leave behind newly formed ice-contact lakes, which are prevalent around the world. These lakes contain high levels of mineral particles, as well as previously trapped inorganic and organic nutrients carried by glacial meltwater. What are the chances of survival for plankton in this type of environment?

Climate Transgressions and Barrier Islands

Barrier Islands support local economies, residents, tourism, fragile environments, and sometimes valuable resources. Yet, they are extremely susceptible to storms and sea level change. A new study examines the past 12,000 years in sediments to try to understand how these coastal landforms may be affected in the future.

There is a need for healthy parrotfish to maintain the reef islands

When you think of sediment erosion and island building physical processes and volcanism may come to mind. Well, you may be pleased to learn that fish build islands too, and get this- they do it with material they erode! However, the eco-geological relationship of island formation and sustainability with biology is not well quantified. This paper discusses research from the Maldives that is directed at quantifying the amount of sediment produced by parrotfish and Halimeda, and how it influences the maintenance of reef islands.

A 2.5 billion year old story about iron in the ocean, told by a rock

New light has been shed on the possibility of an alternative iron sink than previous thought prior to the oxygenation of the oceans 2.45 billion years ago. The findings could affect our interpretations of the early seawater chemistry, nutrient cycling, and trace metal distribution in the Precambrian.

Rise Up! Overestimated sea-level rise during the 20th century.

Calculating a global average change in sea-level over the twentieth-century is no walk in the park. This study uses a new technique to critically look at previous estimates of sea-level rise. The findings suggest that previous estimates may have been too high, but what does this mean for future sea-level rise projections?

Rotten Totten: Why is East Antarctica melting so quickly?

Like the West Antarctica Ice Sheet, East Antarctica is home to glaciers thinning at an alarming rate. The east’s Totten Glacier stores enough water to raise global sea level by 11 feet, similar to projected amounts in West Antarctica. Researchers conducted a study to find out what is causing Totten to melt so quickly. The answer lies beneath the ice.

A Leap in Sea-level Along the East Coast of North America

From 2009-2010, the Northeast coast of North America experienced approximately four inches of sea-level rise, quite the departure from the 2.5 mm per year annual average rate of rise. Researchers link this leap in sea-level to changes in Atlantic Ocean circulation and atmospheric pressure gradients. Will extreme sea-level rise events continue to be the exception, rather than the rule?

Salty Rice: Tasty Treat, or Damaging Effect of Sea Level Rise?

The Mekong Delta in Vietnam is subject to groundwater salt intrusions due to sea level rise, damaging vital crops. Agricultural production will continue to take a hit unless something can be done to either fight or adapt to this phenomenon. Researchers are using modeling to try and find cost-effective and long-lasting solutions.

We’re In Deep Heat: trouble boils over in West Antarctica

An international team of researchers shows that rising ocean temperatures along West Antarctic ice shelves are linked to rising warm water from the deep ocean, and that the rate of warming is larger than previously thought. With no indication of a slow down in warming, these findings illuminate on new realities of sea level challenges likely to be faced in coming decades.

Barrier Island Stability Rooted in Their Plant Life

How stable are the barrier islands that outline many coastal communities around the world? To answer this question, scientists look at the relationship between barrier island elevation and the plant life that populates the dunes.

Sea ice and Albedo: Should We Be Worried?

The glaciers are melting, sea level is rising; you’ve heard it all. But did you know that both of these events are increasing how much solar energy the earth is absorbing? Scientists study 30 years of data from the Arctic Ocean to quantify the role of diminishing sea ice in global warming.

Do you want more salt in that? Changes in salinity impact sea level rise more than previously thought

The main mechanisms driving sea level rise were thought to be through the melting of land-based ice (such as glaciers) and through the thermal expansion of sea water with increasing global temperature. However, a recent study published by a team of scientists from the Lawrence Livermore National Laboratory shows that there might be another driving force behind sea level rise: salinity.

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