Taxonomy term

sea level rise

Rising waters sink seafloors

Predicting how much the ocean surface will rise in the coming years requires complicated, global-scale bookkeeping of the many factors that affect sea levels. In a new study, scientists have, for the first time, quantified the role of ocean-bottom deformation — the gradual deepening of ocean basins under the weight of more water — in both global and regional sea-level rise, an effort that may help produce more accurate sea-level projections.

13 May 2018

Geomedia: On the Web: How will melting ice impact your city?

The relationship between melting glaciers and rising sea levels is best described as: “It’s complicated.” A new online tool shows just how counterintuitive predictions of how melting land-ice will affect coasts can be.

16 Mar 2018

What drives hot spots of sea-level rise?

As sea levels creep up around the world, scientists have observed hot spots where regional rates of sea-level rise greatly outpace the global average. But what drives the formation of these hot spots, and how long they last, have been mysteries. In a new study, scientists tracking sea levels along the Florida coast suggest that the combined effects of two naturally occurring climate processes, the El Niño-Southern Oscillation (ENSO) and the North Atlantic Oscillation (NAO), control sea-level hot spot formation along the U.S. East Coast.

01 Dec 2017

Bottom dropping out of coral reefs

Coral reefs provide habitat for 25 percent of all marine life, support fishing and tourism economies, and protect shorelines from surging waves and storms. But since the 1970s, coral populations have been waning because of warming waters, coastal development and pollution. Recently, scientists studying several beleaguered reef systems have discovered an unexpected consequence of their decline — the seafloor around the reefs is eroding, leaving coastal communities more vulnerable to high winds and waves.

17 Jul 2017

Ice (Re)Cap: December 2016

From Antarctica to the Arctic; from polar caps, permafrost and glaciers to ocean-rafted sea ice; and from burly bears to cold-loving microbes, fascinating science is found in every nook and crevasse of Earth’s cryosphere, and new findings are announced often. Here are a few of the latest updates.

09 Dec 2016

Sea-level rise a risk for millions in the United States

One of the most obvious consequences of human-induced global warming is glacial melting and the sea-level rise that will occur as a result. Yet, few studies examining the potential toll of sea-level rise in the United States have factored in continuing population growth, according to the authors of a new study in Nature Climate Change. Using population projections for the year 2100, researchers led by Mathew Hauer of the University of Georgia projected how many people in the U.S. would be displaced by then due to sea-level rise of either 0.9 meters or 1.8 meters.

21 Jul 2016

Fate of atolls not necessarily tied to sea-level rise

The western Pacific Ocean is home to many atolls: rings of low-lying islands built from calcite sands and the erosional remnants of coral reefs. This region is also home to some of the highest rates of sea-level rise in recent decades — an unsettling fact for the atolls’ inhabitants and others worried that rising waters will eat away at the islands and evict residents for good. But according to a new study documenting long-term change at one Pacific atoll, the future for such islands might not be so bleak.

30 Aug 2015

Sea-level rise accelerating

Studies tracking sea-level rise over the past few decades have been all over the map, with reports variously indicating that the rate of rise has accelerated, stayed constant or declined. Now, a new GPS-based study published in Nature Climate Change indicates that sea-level rise has indeed been accelerating over the last decade.
28 Aug 2015

Coastal cities will see regular flooding

Rising sea levels will likely lead to regular flooding in most coastal cities in the future, according to a study conducted by the National Oceanic and Atmospheric Administration (NOAA). The report, which used tide-gauge records to chart annual flood rates, showed that these rates have increased substantially in the past 50 years and projected that a majority of U.S. coastal areas will likely experience 30 or more days of flooding each year by 2050.

03 Apr 2015

Seeing beneath Greenland's ice

Save the handful of Vikings who settled an ice-free stretch of Greenland’s southwest coast during the Medieval Warm Period a millennia ago, few humans have ever laid eyes on even a fraction of the land that lies below Greenland’s 1.7-million-square-kilometer ice sheet. Now, courtesy of a new model, scientists are seeing a detailed view of the topography underlying the ice sheet, which is an important control on the flow and discharge of ice into the ocean.

23 Sep 2014