Tag Archives: Sea Level Rise

Great Barrier Reef study shows how reef copes with rapid sea-level rise

great-barrier-reef
Great barrier of reef, Australia. Photo source: ©© Secruza

Excerpts;

A survey of coral reef cores on the Great Barrier Reef has revealed how it has responded to recent periods of rapid sea-level rise. The study, covering the past 9000 years, has revealed a system in delicate balance.

Read Full Article; Science Daily (12-03-2019)

Great Barrier Reef health outlook downgraded to “very poor” due to ocean warming; CBS News (08-30-2019)

Why the Great Barrier Reef is in danger; MNN (09-07-2018) (09-12-2018)

Video Captures the Violent Act of Coral Bleaching, LiveScience (08-17-2016)

Global warming is transforming the Great Barrier Reef; Science Daily (04-18-2018)
A new study shows that corals on the northern Great Barrier Reef experienced a catastrophic die-off following the extended marine heatwave of 2016…

Great Barrier Reef coral bleaching has started early, biologist says; Guardian UK (01-19-2018)
Warm water has already begun bleaching coral on the Great Barrier Reef, weeks ahead of the period with highest forecast risk. Satellite data suggest widespread bleaching is possible by March…

A Close-Up Look at the Catastrophic Bleaching of the Great Barrier Reef; Yale E360 (04-10-2017)
Scientists are reporting the second mass bleaching in the Great Barrier Reef in the last year. In a Yale Environment 360 interview, researcher Terry Hughes says these events have damaged two-thirds of the world’s largest coral reef and are directly caused by global warming…

Coral bleaching hits 93% of Great Barrier Reef, Video, Science Daily (04-21-2016)
Australia’s Great Barrier Reef is suffering its worst coral bleaching in recorded history with 93 percent of the World Heritage site affected, scientists say as they reveal the phenomenon is also hitting the other side of the country…

Great Barrier Reef: the scale of bleaching has the most sober scientists worried, Guardian UK (04-16-2016)
I have dived hundreds of times, with different teams of scientists, along the reef. Yet the scale of this bleaching event has even the most sober and senior coral reef scientists worried. If the rhetoric from marine biologists is to be believed, then the Great Barrier Reef is now in the grip of a “bommie apocalypse”…

Great Barrier Reef’s Unprecedented Threat From Dredging, Dumping; Guardian UK (05-07-2014)
The impact of dredging and dumping sediment on the Great Barrier Reef has been far greater than the mining industry has claimed, with nearly 150m tonnes of new dredging set to take place in the reef’s waters, a study shows…

Antarctic ice sheets could be at greater risk of melting than previously thought


Antarctica. Photo courtesy of © Denis Delestrac for Coastal Care’s Photo of the Month, July and August 2018.

Excerpts;

Antarctica is the largest reservoir of ice on Earth — but new research by the University of South Australia suggests it could be at greater risk of melting than previously thought…

Read Full Article; Science Daily (12-02-2019)

315 billion-tonne iceberg breaks off Antarctica; BBC News (09-30-2019)
The Amery Ice Shelf in Antarctica has just produced its biggest iceberg in more than 50 years…

This Florida Keys neighborhood has been flooded for nearly 3 months


Photo source: ©© Bryan Elkus

Excerpts;

The flooding here and elsewhere is happening during so-called “king tides.” Those are times, mostly in the fall, when the moon’s gravitational pull means tides are higher than usual.

Read Full Article; NPR (11-28-2019)

Rising tides force Miami Beach residents to seek higher ground; CBS News (09-25-2019)

Column: High-rises spell the end for Florida beaches; By Orrin H. Pilkey and J. Andrew G. Cooper; Tampa Bay (07-25-2017)
Floridians are becoming more attuned to sea level rise and more familiar with nuisance flooding related to the rising sea. However, we believe there is less recognition that by century’s end it is likely that most of Florida’s major beaches will be permanently gone…

California King Tides Project: January 10-12 and February 8-9, 2020; California Coastal Commission (10-31-2019)

Worst floods for 50 years bring Venice to ‘its knees’; CNN (11-13-2019)
The worst flooding to hit Venice in more than 50 years has brought the historic city to its knees. Local authorities in the Italian lagoon city called for a state of emergency to be imposed…

Indian Ocean Dipole spells flood danger for East Africa; The New Humanitarian (10-22-2019)
Hundreds of thousands of people in East Africa are affected by heavy rains and floods linked to record-breaking temperature changes in the Indian Ocean. As a result, higher evaporation off the African coastline is being dumped inland as rainfall: a simplified description of 2019’s positive Indian Ocean Dipole (IOD) episode…

New Earth mission will track rising oceans into 2030


The Jason-CS/Sentinel-6 mission that will track sea level rise, one of the clearest signs of global warming, for the next 10 years. Sentinel-6A, the first of the mission’s two satellites, is shown in its clean room in Germany and is scheduled to launch in November 2020. Credits: IABG

By NASA;

Earth’s climate is changing, and the study of oceans is vital to understanding the effects of those changes on our future. For the first time, U.S and European agencies are preparing to launch a 10-year satellite mission to continue to study the clearest sign of global warming — rising sea levels. The Sentinel-6/Jason-CS mission (short for Jason-Continuity of Service), will be the longest-running mission dedicated to answering the question: How much will Earth’s oceans rise by 2030?

By 2030, Sentinel-6/Jason-CS will add to nearly 40 years of sea level records, providing us with the clearest, most sensitive measure of how humans are changing the planet and its climate.

The mission consists of two identical satellites, Sentinel-6A and Sentinel-6B, launching five years apart. The Sentinel-6A spacecraft was on display for the media on Nov. 15 for a last look in its clean room in Germany’s IABG space test center. The satellite is being prepared for a scheduled launch in November 2020 from Vandenberg Air Force Base in California on a SpaceX Falcon 9 rocket.

Sentinel-6/Jason-CS follows in the footsteps of four other joint U.S.-European satellite missions — TOPEX/Poseidon and Jason-1, Ocean Surface Topography/Jason-2, and Jason-3 — that have measured sea level rise over the past three decades. The data gathered by those missions have shown that Earth’s oceans are rising by an average of 0.1 inches (3 millimeters) per year.

Sentinel-6/Jason-CS will continue that work, studying not just sea level change but also changes in ocean circulation, climate variability such as El Niño and La Niña, and weather patterns, including hurricanes and storms.

“Global sea level rise is, in a way, the most complete measure of how humans are changing the climate,” said Josh Willis, the mission’s project scientist at NASA’s Jet Propulsion Laboratory in Pasadena, California. “If you think about it, global sea level rise means that 70% of Earth’s surface is getting taller — 70% of the planet is changing its shape and growing. So it’s the whole planet changing. That’s what we’re really measuring.”

Decades of space- and ground-based observations have documented Earth’s surface temperature rising at a rapidly accelerating rate. The oceans help to stabilize our climate by absorbing over 90% of the heat trapped on the planet by excess greenhouse gases, like carbon dioxide, that have been emitted into the atmosphere since the start of the Industrial Revolution.

As the oceans warm, they expand, increasing the volume of water; the trapped heat also melts ice sheets and glaciers, contributing further to sea level rise. The rate at which it is rising has accelerated over the past 25 years and is expected to continue accelerating in years to come.

Sentinel-6/Jason-CS will measure down to the millimeter how much global sea level rises during the 2020s and how fast that rise accelerates. As the rate increases, humans will need to adapt to the effects of rising seas — including flooding, coastal erosion, hazards from storms and negative impacts to marine life.

Along with measuring sea level rise, the mission will provide datasets that can help with weather predictions, assessing temperature changes in the atmosphere and collecting high-resolution vertical profiles of temperature and humidity.

As with its Jason-series predecessors, Sentinel-6/Jason-CS will gather global ocean data every 10 days, providing insights into large ocean features like El Niño events. However, unlike previous Jason-series missions, its higher-resolution instruments will also be able to provide data on smaller ocean features — including complex currents — that will benefit navigation and fishing communities.


One week’s worth of data from NASA’s Earth observing satellites show the rising sea level on Earth between Oct. 29 and Nov. 7, 2019. Areas in red show higher levels, while blue show the lowest. The joint U.S.-European Sentinel-6/Jason-CS mission will continue efforts to track sea level rise. Credits: NASA/JPL-Caltech

“Global sea level rise is one of the most expensive and disruptive impacts of climate change that there is,” said Willis. “In our lifetimes, we’re not going to see global sea level fall by a meaningful amount. We’re literally charting how much sea level rise we’re going have to deal with for the next several generations.”

Sentinel-6/Jason-CS is being jointly developed by the European Space Agency (ESA), the European Organisation for the Exploitation of Meteorological Satellite (EUMETSAT), NASA and the National Oceanic and Atmospheric Administration (NOAA) with funding support from the European Commission and support from France’s National Centre for Space Studies (CNES). NASA’s contributions to the Sentinel-6 mission are science instrument payloads for the two Sentinel-6 satellites, launch services for those satellites, ground systems supporting the science instruments operations and support for the international Ocean Surface Topography Science Team.

Original Article; NASA (11-20-2019)

Waterfront retreat: a Bay community faces rising seas and buyouts


Photograph: © SAF — Coastal Care

Excerpts;

Beset by sea level rise and increasing storm damage, most residents of the Delaware Bay community of Money Island have opted to take buyouts from the state and abandon their homes. An e360 video shows that for those who remain, the decision to stay or leave can be agonizing…

Read Full Article and Watch Video; Yale E360 (11-21-2019)

Rising sea levels pose threat to homes of 300m people – study; Guardian UK (10-29-2019)

Is Your Home At Risk Of Flooding From Rising Seas By 2050? Check This Map; BuzzFeed News (11-13-2018)

Coastal property was once king. Fears of climate change are undermining its value; The WSJ (10-31-2018)
In a growing number of coastal communities, homes near the sea are appreciating more slowly than those inland. That’s bad news for people on the beach, good news for those farther away…

Coastal residents need to set aside money now to cope with future flooding; Sun Sentinel (07-10-2018)
Sea-level rise is a national economic insecurity. According to the National Ocean Service, 39 percent of the U.S. population in 2010 lived in counties that are on shorelines…

Coastal homes could see flood insurance premium going up again, and that’s only the beginning; Miami Herald (07-24-2018)

Sea level rise is already eroding home values, unbeknownst to their owners; NOLA (08-21-2018)

Rising seas threaten nearly $1 trillion worth of US homes, and most of them are moderately priced; CNBC (10-18-2017)

Sea Level Rise Will Reshape U.S. Population In All 50 States; Yale E360 (04-19-2017)
Sea level rise could cause mass migrations that will affect not just the United States’ East Coast, but reshape communities deep in the heart of the country, according to new research…

Surrendering to rising seas; Scientific American (08-2018)
Coastal communities struggling to adapt to climate change are beginning to do what was once unthinkable: retreat…

California prepares policy for coastal ‘retreat’; E & E News (12-07-2018)
Oceanfront homes could be demolished along California’s coastline under a groundbreaking proposal to preserve the state’s made-for-movies beaches before they’re destroyed by rising seawater. The California Coastal Commission plans to release guidance early next year for dealing with sea-level rise in residential areas…

Let’s end war with ocean, Op-Ed by Orrin H. Pilkey (04-2017)
The immediate future most certainly holds more miles of sandbags, resulting in more narrowed and ugly beaches.But this trend can be halted and reversed. Now is the time to make peace with the ocean.The time is now to stop sandbagging, both physically with no more shore-hardening structures, and politically with no more exceptions to the intent of the rules, no more undermining existing legislation, and a return to enforcement…

The only answer to rising seas is to retreat; By Orrin H. Pilkey & Keith C. Pilkey; The News & Observer (10-18-2017)
Except for the timing, there is no controversy among scientists regarding sea level rise. Defending the coast and holding the shoreline in place ultimately will be futile. With a three-foot or a six-foot sea level rise, we will retreat, probably beginning within the next 50 years…

Venice is sinking and this time it may go under


Acqua alta, Venice, Italy. Photograph: © SAF — Coastal Care

Excerpts;

From its founding in the Early Middle Ages, Venice has had a fraught relationship with the sea, dependent on it for food and trade, protected from the mainland by the waters of the lagoon, yet always threatened by changing environmental conditions.

Today, though, wind and water lash the palaces and churches with alarming frequency. “Acqua alta,” the term locals use for when the water gets high, pours through the city, most recently even flooding the great church of San Marco. According to The Guardian, it’s only the sixth recorded time the church has flooded in the last 1200 years, but the fourth in the last 20 years. Venice is sinking, and this time it may go under…

Read Full Article; CNN (11-15-2019)

Worst floods for 50 years bring Venice to ‘its knees; CNN (11-13-2019)
The worst flooding to hit Venice in more than 50 years has brought the historic city to its knees. Local authorities in the Italian lagoon city called for a state of emergency to be imposed…

Worst floods for 50 years bring Venice to ‘its knees’

venezia
Acqua alta, Venice, Italy. Photograph: © SAF — Coastal Care

Excerpts;

The worst flooding to hit Venice in more than 50 years has brought the historic city to its knees. Local authorities in the Italian lagoon city called for a state of emergency to be imposed…

Read Full Article; CNN (11-13-2019)

Two people die as Venice floods at highest level in 50 years; Guardian UK (11-13-2019)
Flood levels in the lagoon city reached the second-highest level since records began in 1923 as a result of the acqua alta, which hit 1.87 metres (74in). More than 85% of Venice was flooded.
‘This is result of climate change,’ says Venice mayor, who declares state of emergency…

Sea levels to continue rising after Paris agreement emission pledges expire in 2030


Photograph: © SAF — Coastal Care

Excerpts;

Sea levels will continue to rise around the world long after current carbon emissions pledges made through the Paris climate agreement are met and global temperatures stabilize, a new study indicates.

The new study is the first to quantify how much sea level would rise from the carbon emissions pledged under the Paris agreement. The researchers found that emissions released during the initial 15-year period of the agreement would cause sea levels to rise by about 20 centimeters by the year 2300…

Read Full Article; Science Daily (11-04-2019)

Rising sea levels pose threat to homes of 300m people – study; Guardian UK (10-29-2019)
More than three times more people are at risk from rising sea levels than previously believed, research suggests…

Coastal Warning: An Unwelcome Messenger on the Risks of Rising Seas; By Orrin H. Pilkey; Yale E360 (12-06-2018)

California King Tides Project: January 10-12 and February 8-9, 2020


Butterfly Beach, California. Photograph: © SAF — Coastal Care
“King tide” is the informal term generally used to describe an exceptionally high tide, which most often occurs when the Moon and the Sun are aligned and their gravitational pull on the Earth is at its strongest.NASA, AeroTech News

Excerpts;

The California King Tides Project helps people visualize future sea level by observing the highest high tides of today. You can help by taking and sharing photos of the shoreline during King Tides to create a record of the changes to our coast from sea level rise.

Find out at what time and how high the King Tides will be near you. Check back here in December to find a calendar of King Tides events hosted by local community organizations…

Read Full Article; California Coastal Commission (10-31-2019)

NASA helps California get ahead of coastal flooding (08-26-2019)
NASA in cooperation with the U.S. Geological Survey is helping emergency planners in Southern California get a more complete picture of the increasing risk of coastal flooding by looking at the highest of tides —”king tides…”