All posts by Coastal Care

Climate change could kill all of Earth’s coral reefs by 2100, scientists warn


Photograph: © SAF — Coastal Care

Excerpts;

Climate change could destroy almost all of Earth’s coral reef habitats by 2100, according to new research.

About 70-90% of all existing coral reefs are expected to disappear in the next 20 years due to warming oceans, acidic water and pollution, said scientists from the University of Hawaii Manoa, who presented their findings Monday at an ocean sciences conference…

Read Full Article; CNN (02-20-2020)

Revealed: quarter of all tweets about climate crisis produced by bots


Image source: NOAA

Excerpts;

The social media conversation over the climate crisis is being reshaped by an army of automated Twitter bots, with a new analysis finding that a quarter of all tweets about climate on an average day are produced by bots, the Guardian can reveal.

The stunning levels of Twitter bot activity on topics related to global heating and the climate crisis is distorting the online discourse to include far more climate science denialism than it would otherwise…

Read Full Article; Guardian UK (02-21-2020)

Climate change tipping point could be coming sooner than we think; Science Daily (01-23-2019)
A new study confirms the urgency to tackle climate change. While it’s known that extreme weather events can affect the year-to-year variability in carbon uptake, and some researchers have suggested that there may be longer-term effects, this study is the first to actually quantify the effects through the 21st century and demonstrates that wetter-than-normal years do not compensate for losses in carbon uptake during dryer-than-normal years, caused by events such as droughts or heatwaves…

Oil and gas firms ‘have had far worse climate impact than thought’; Guardian UK (02-19-2020)

‘The only uncertainty is how long we’ll last’: a worst case scenario for the climate in 2050; Guardian UK (02-15-2020)

20,000 deaths since 1999: New report reveals deadly impact of extreme weather in France

xynthia-mayor-official
La Faute sur Mer’s mayor (left) and Vendée’s senator (right) in front of an aerial view of the 2 inundated towns of L’Aiguillon and La Faute sur Mer, Vendée, France. Photo source: ©© Sénat

Excerpts;

France is one of the most exposed countries in the world to the risks of extreme weather, a new report has found, with nearly 20,000 deaths linked to heatwaves, floods and storms in the last 20 years.

The report from the global climate charity Germanwatch ranked 183 countries around the world according to how exposed they are to extreme weather events – such as heatwaves, storms and flooding – linked to climate change.

France was ranked in the top 20 most exposed countries in the world, in the same bracket as India and Madagascar.The worst affected countries in the world were Puerto Rico, Honduras, Myanmar and Haiti…

Read Full Article; The Local Fr (12-14-2019)

À La Faute-sur-Mer, le temps n’a pas effacé le cauchemar de la tempête Xynthia; Le Figaro (02-21-2020)
Ten years after Xynthia storm devastated France, scars still remain.

La Faute-sur-Mer and l’Aiguillon-sur-Mer beaches, Vendée, France; By Claire Le Guern (03-2010)
The very last day of February 2010. It is 4:00 am. Howling winds, whipping rains, infuriated seas, and eight meter high (26 feet) crashing waves, are muffling the desperate cries for help…4:00 am… Twenty nine human lives are being swept away, drowned in the frigid and salty ocean waters. They were in their sleep, in their beds, in the comfort of their home. They did not understand, they could not react, most of them too old, too frail, or much too little to run for safety and climb on the rooftops, like most of the survivors did…
When daylight unveiled the disaster, French Prime Minister François Fillon held an emergency cabinet meeting and afterward called the storm a “national catastrophe.” French President Nicolas Sarkhozy, declared: “We have to find out how families in France in the 21st-century can be surprised in their sleep and drowned in their own houses.” Mr. Sarkozy added, “We have to shed light as urgently as possible on this unacceptable and incomprehensible tragedy.”
As much as this tragedy is utterly unacceptable, it is all too comprehensible and sadly, previously announced by warnings from many scientists, locals, and even more relevantly by an official 2008 report from the Vendée Equipment Department, DDE. The risks of marine submersion were known to the Vendée DDE, which strongly addressed and questioned coastal safety, citing in particular the fragile sea walls in L’Aiguillon-sur-Mer and La Faute-sur-Mer, as well as their existing location and development in flood-prone areas. “There is no doubt about the vulnerability of the Vendée coast to marine submersion”…

A French beach cleared of homes shows NC the way; By Orrin H. Pilkey; News Observer (02-24-2019)

Developers don’t get it: climate change means we need to retreat from the coast, Guardian UK (15-03-2016)
It is preposterous to build in areas that are bound to flood. So why are real estate companies still doing it?..

Florida surfer uses drone to capture awe-inspiring views of sharks

black-tip-shark
Photograph: © SAF — Coastal Care

Excerpts;

A Florida surfer didn’t realize just how many sharks were swimming around him until he recorded drone video over the beach…

Read Full Article; CNN (02-20-2020)

Researchers captured footage of a rare shark nursery 2,500 feet below the coastal waters of Ireland; BusinessInsider (11-12-2018)
Drone footage of a rare shark nursery, found 200 miles off Ireland’s western coast, has been revealed. It’s being called a discovery on a “scale not previously documented in Irish waters…”

How Should We Respond When Humans and Sharks Collide? National Geographic (07-05-2013)

Exploring the secrets of marsh happiness


Can you tell if the two marshes shown above are thriving or deteriorating over time?

By NOAA;

Two Unhappy Marshes
Researchers found that both of these marshes are “unhappy,” even though one of them appears to be vibrant and healthy. “Happy,” or persistent, marshes all share common traits. It is more difficult to characterize “unhappy,” deteriorating tidal marshes, because these ecosystems can fall apart in many different ways. By understanding how marshes can deteriorate so differently, coastal managers can make wiser conservation decisions.

NOAA research reserve scientists and partners recently published a study that examines the secret to marsh happiness. The team learned that “happy” marshes shared similar characteristics, whereas “unhappy” marshes deteriorate in diverse ways. By understanding how marshes can deteriorate so differently, coastal managers can make wiser conservation decisions.

Published in Environmental Research Letters, the study ground-truthed previous resilience findings from the National Estuarine Research Reserve System and U.S. Geological Survey. Many partners contributed, and the authors included scientists from the Elkhorn Slough and Narragansett Bay Research Reserves.

According to the study, “happy,” or persistent, marshes all shared common traits. What healthy marshes shared most of all was vegetation distributed on the higher end across low-to-high landscape elevations. The single most important measurement in assessing a “happy” tidal marsh is whether a sizeable proportion of its vegetation is at a high elevation in relation to current water levels. Another feature of “happy” marshes is a low percentage of unvegetated versus vegetated area in the marsh landscape.

Characterizing an “unhappy,” deteriorating tidal marsh is more complex because marshes can fall apart in many different ways. One finding contradicted a previous assumption: namely, that gains in marsh elevation and sediment indicate greater resilience. The authors say marshes with these characteristics performed inconsistently and often signaled the muddy mess that degrading marshes can become, not marsh health.

Original Article and Learn More; NOAA (02-19-2020)