Posts tagged sea level rise.

jeffbradynpr:

With Rising Seas, America’s Birthplace Could Disappear

The first successful English colony in America was at Jamestown, Va., a swampy island in the Chesapeake Bay. The colony endured for almost a century, and remnants of the place still exist. You can go there and see the ruins. You can walk where Capt. John Smith and Pocahontas walked.

But Jamestown is now threatened by rising sea levels that scientists say could submerge the island by century’s end.

NPR

Well worth clicking through. I once argued with a history prof that thousands of historic sites were at risk from climate change. She thought it was too extreme…

  05/15/13 at 11:28am via jeffbradynpr

The Guardian has a multi-part, video heavy media set on climate refugees in America. I’d argue that the title “first” is a misnomer and would point to the coastal communities in Texas, New Orleans, and the Carolinas who’ve been retreating from the coasts for several years.  But, the point is made - that sea-level rise and coastal erosion is much more aggressive than at anytime in history. Thus, tens of thousands of people are at immediate risk, especially the poor.

The above is one minute.

The people of Newtok, on the west coast of Alaska and about 400 miles south of the Bering Strait that separates the state from Russia, are living a slow-motion disaster that will end, very possibly within the next five years, with the entire village being washed away.

The Ninglick River coils around Newtok on three sides before emptying into the Bering Sea. It has steadily been eating away at the land, carrying off 100ft or more some years, in a process moving at unusual speed because of climate change. Eventually all of the villagers will have to leave, becoming America’s first climate change refugees.

  05/14/13 at 02:11pm

skeptv:

Earth from Space: Water and ice

Earth from Space is presented by Kelsea Brennan-Wessels from the ESA Web-TV virtual studios. The largest outlet glacier on Greenland’s east coast is pictured in the forty-eighth edition. Via ESA.

Discusses satellites monitoring shrinking glaciers and rising oceans.
  05/03/13 at 03:25pm via youtube.com

Four Lessons from Hurricane Sandy ›

  04/30/13 at 09:34pm

The Artic’s Shrinking Ice Cover

Sea ice is any form of ice found at sea that originated from the freezing of sea water. It is the most visible feature of the Arctic Ocean, with its extent waxing and waning with the seasons. Ice thickness is highly variable, ranging from a thin veneer to tens of meters. While the existence of sea ice reflects the cold conditions inherent to high latitudes, sea ice also strongly modulates the energy budget and climate of the Arctic and beyond, particularly because it is white, and hence reflects much of the sun’s energy back to space (it has a high albedo) and also through acting as a lid, insulating the underlying ocean from a generally much colder atmosphere.

Historically, at its maximum extent in March, Arctic sea ice covered an area more than 15 million square kilometers, somewhat less than twice the size of the contiguous United States. The minimum extent, occurring in September, the end of the melt season, was typically around 7.0 x106 km2. However, as assessed over the modern satellite record spanning 1979 to the present, Arctic sea ice extent exhibits downward linear trends for all months, weakest in winter and strongest for September. The downward September trend appears to have accelerated over the past decade. Through 2001, the September trend stood at -7.0% per decade. Through 2012, it was more than twice as large at -14.3% per decade. The six lowest September extents in the satellite record have all occurred in the past six years, with September of 2012 setting a new low mark. Decreased summer ice extent has been accompanied by large reductions in winter ice thicknesses that are primarily explained by changes in the ocean’s coverage of thick multiyear ice (MYI). MYI is ice that has survived at least one summer melt season. In the mid-1980s, MYI accounted for 70% of total winter ice extent, whereas by the end of 2012 it had dropped to less than 20%. At the same time the proportion of ice older than 5 years declined from 50% of the MYI pack to less than 8%.

Ice loss is also contributing to strong rises in Arctic air temperature during autumn and winter, not just at the surface, but extending through a considerable depth of the atmosphere. As discussed, sea ice acts as a lid, insulating the underlying ocean from a generally much colder atmosphere. With less ice, the insulating effect is weaker, so heat can readily be transferred from the ocean to the atmosphere above. This strong warming, termed Arctic amplification, is starting to extend beyond areas of ice loss to influence Arctic land areas.

Continued loss of the ice cover is in turn likely to impact on patterns of atmospheric circulation and precipitation not just within the Arctic, but into middle latitudes; there is evidence that this is already occurring. The basic reason for this is that the outsized warming of the Arctic changes the atmospheric stability and temperature differences between the Arctic and lower latitudes. Finally, as the ice cover retreats, the Arctic is becoming more accessible for marine shipping as well as oil and natural gas exploration, increasing the economic and strategic importance of the region.

  04/28/13 at 10:18am

In Kivalina v ExxonMobil, I and two other students represented ExxonMobil in ‘moot court’ in a climate change law class at Vermont Law School. We won. In fact, my team crushed the environmental law students who represented the impoverished Native Alaskans of the Village Kivalina.

ExxonMobil (and about a dozen other oil companies) was sued by a small island village located along the northern coastline of Alaska called Kivalina. The claim was that the oil companies had altered the earth’s atmosphere so much that its climate changed to the detriment of the village. The village is, as you read this, literally being eaten by the ocean at rates never seen in history. They wanted the oil companies to pay for relocating the villagers. They also sued to expose a conspiracy to mislead the public - the so-called “climate denial” you hear so much about.

Exxon defended itself on several grounds, and easily won the case. Although climate change was not under question, Kivalina could not prove that Exxon et al were the actual cause of their harm. This is called traceability - basically, they couldn’t trace the exact carbon molecules back to the oil companies.

So, the case was thrown out for ‘lack of standing.’ Standing is the first hoop of getting into court - you have to show a clear connection between the harm and the cause. If you can’t make it past this first test, the case is thrown out. None of the ‘merits’ or arguments for or against are even discussed. Such is the law.

Ironically, Kivalina was represented pro-bono (free) by one of the most controversial and powerful attorneys in America, Theodore Olson. Recall, Ted is a conservative-republican, anti-Clintonian who argued and won in Bush v Gore in the Supreme Court. In fact, he’s won 20 out of his 23 SCOTUS cases, almost all for conservative causes.

Olson, strangely, has taken a severe left turn as of late (perhaps to make up for a career of bullying liberals). In addition to representing the poor people of Kivalina, he’s currently the co-lead attorney in the Prop 8 same-sex marriage case that everyone is so stoked about. So the man who wrought George Bush upon the world is now representing core liberal causes, thus demonstrating that America’s cultural memory is astoundingly atrocious.

There are about 400 Native Alaskans (technically Inupiat Eskimos) in Kivalina, and their island is literally eroding away by rising sea levels and melting because much of the land is permafrost - both issues are caused (in part) by a changing climate. Warmer temperatures causes thermal expansion in the ocean, and the temperatures melt glaciers and sea ice. This causes sea levels to rise, and islands and coastal cities have to deal with the impacts (they were originally planned to handle a little bit of sea rise, but not the aggressive rise occurring today).

The above Kickstarter, and the quasi-point of this long post, is for a documentary about the lives of the Kivalinans - it’s about the people, and not about the legal case.

Kivalina People is being directed by a young film maker from Brooklyn named Gina Abatemarco, who decided to film and produce the documentary about 5 years ago.

I’ve been following the plight of the Kivalina for several years, hoping that they’d have their justice, or at least a good day in court. They haven’t. Their island is disappearing, and it will cost tens of millions to move them to new territory. I hope Gina’s documentary is viewed by millions.

One of the most important skills I learned in law school was how to argue - convincingly - the opposing side. I learned that the law is skewed to protect the accused, even in cases where the accused is clearly liable. We won that case in class on a technicality. And in court, technicalities can be cold and cruel son’s a bitches.

  04/24/13 at 09:47pm

When ocean scientist Andrew Thaler found an old, outdated water level gauge, he found a way to give it new life — turning it into a tool to measure public interest in sea level rise. Instead of tracking water, the Sea Leveler tracks how much people are talking about water on Twitter.

(via Project: Recycle old scientific equipment into new tools for public engagement - Boing Boing)

Old water level gauge repurposed to monitor public interest in #sealevelrise on twitter.

(via mothernaturenetwork)

  04/24/13 at 08:29am via Boing Boing

Sea Level Rise Task Force: NYC and Long Island underprepared for climate impacts ›

New York City’s Sea Level Rise Task Force predicts 7 to 20 inches of sea level rise for Lower Hudson and Long Island Sound. Some areas will experience less sea level rise, and others more. The wide variation depends on elevation, geology, erosion rates, water outflow from the Hudson River, existing buildings, and infrastructure.

Global mean sea level has been generally rising since the end of the last ice age. In the 18th and 19th centuries the rise was small, but during the 20th century the seas rose faster, primarily because ocean waters have warmed and expanded, and larger volumes of meltwater from mountain glaciers are now reaching the sea.

Conservative projections expect the seas will rise by 7 to 23 inches by 2100, but do not account for rapid melt of land-based ice. The latest studies take into account rapid ice melt, which we are already observing, to project a rise in global mean sea level of three feet or more.

Rising sea levels pose serious threats to coastal communities and natural resources, both worldwide and in New York. To ensure the future usability and security of facilities, transportation and critical resources (such as drinking water), government officials and private sector planners need the best available sea level rise projections.

How Sea Level Rise Will Impact New York

Well over half of New Yorkers live in marine coastal counties. Already, many communities and natural resources along the ocean coast and tidal portions of the Hudson River are at risk to damaging storms. This risk affects not only built resources, but also critical ecosystem services such as flood buffers, drinking water protection and species habitat.

According to the 2007 Northeast Climate Impacts Assessment by the Union of Concerned Scientists, as seas rise

  • The risk of severe flooding and storm damage will increase
  • Beaches and bluffs will suffer increased erosion
  • Low-lying areas will be inundated, with potential for saltwater to infiltrate into surface waters and aquifers
  • Sewage and septic systems, transportation and water treatment infrastructure will be at risk from flooding and erosion.
  04/24/13 at 07:39am

polarbearsinternational:

The National Oceanic and Atmospheric Administration (NOAA) released the results of three studies this week, reporting that the Arctic Ocean will be nearly ice-free in summers by the middle of the century. It’s possible that the Arctic will be ice-free within the next decade or two, which is sooner that scientists thought just a few years ago.

Sea level rise causes salt water to mix with fresh water inland, creating a toxic saline that kills trees, destroys aquifers, and corrodes soils. These banana trees died from salt water inundation.

From the excellent slide show on climate impacts on Kiribati islands:

Kiribati enters the end game against climate change - in pictures

Father Martin, parish priest on the island of Abaiang walks through the wasteland that used to be the village of Tebunginako garden. Rising sea water made the soils heavily saline and unable to support the Bananas and Taro vital to the villagers’ survival

  04/16/13 at 09:09am

Fantastic climate change project out of the University of Kansas. It shows how UAVs (aka, drones) are being used to analyze disappearing ice and sea level rise. Most interesting is that this is an NSF funded project with excellent real-world applications. The project can assist coastal governments better prepare for impacts, help urban planners to build better cities, and get students involved in reducing vulnerability in coastal and low-lying areas. 

  04/14/13 at 10:44pm

'Groundwater Inundation' Doubles Previous Predictions of Flooding With Future Sea Level Rise ›

Salt water will mix and spoil freshwater supplies as sea-levels rise. This is called “groundwater inundation.” Recent study shows that rates of inundation are much higher than previously projected. This will become very problematic for cities, ecosystems, and forests near coastlines that depend on freshwater from the ground.

“With groundwater tables near the ground surface, excluding groundwater inundation may underestimate the true threat to coastal communities,” said Rotzoll, lead author of the study.

“This research has implications for communities that are assessing options for adapting to SLR. Adapting to marine inundation may require a very different set of options and alternatives than adapting to groundwater inundation,” states Fletcher, Principle Investigator on the grant that funded the research.

Groundwater inundation is localized coastal-plain flooding due to a simultaneous rise of the groundwater table with sea level. Groundwater inundation is an additional risk faced by coastal communities and environments before marine flooding occurs because the groundwater table in unconfined aquifers typically moves with the ocean surface and lies above mean sea level at some distance from the shoreline.

Rotzoll and Fletcher combined measurements of the coastal groundwater elevation and tidal influence in urban Honolulu with a high-resolution digital elevation model. With this, they were able to assess vulnerability to groundwater inundation from SLR.

Via ScienceDaily

  04/12/13 at 02:13pm

Rodents of Unusual Size is a new documentary on an invasive rodent called Nutria. Nutria’s grow to about 20 pounds(!) and are destroying critical wetlands in Louisiana. Click above to learn more. 

  04/10/13 at 01:15pm

roomthily:

ice fractures on the Beaufort Sea

via Earth Observatory

Aggressive beach erosion from rising sea levels will cost tourist towns, like this one in New Jersey, millions of dollars to fix. As beaches erode, engineers scrape sand from the ocean’s floor and poor it back onto shoreline. They then tamp the sand down with special equipment.

The bill for such projects (and there are many) falls on federal, state, and local tax payers to pay for these projects - millions each year. The restored beaches keeps tourists visiting and shopping, supporting local economies. But is it worth it? Should you pay for other city’s poor land use development choices? Who decides?

Beach replenishment (also called “beach nourishment”) is an engineering strategy commonly used on sandy shorelines where erosion threatens coastal property and infrastructure. The process involves extracting sand from a source area and delivering it to where the shoreline is actively eroding. Replenishment is considered a “soft” alternative to the construction of “hard” coastal structures such as groynes, seawalls, and rock revetments. Unlike these structures, which are effectively permanent, beach replenishment is transient, requiring periodic deliveries of fresh sand. Why would coastal managers choose a temporary solution over an apparently more lasting one? Because hard structures built to forestall coastal erosion tend to prevent sand from accumulating in front of them — and on developed shorelines, sand is worth money.

A beach in a tourist town is an example of a landscape with “natural capital.” Essentially, the width of the beach has an economic value. Economists have shown that valuation of beach width is rather like Goldilocks and the Three Bears: beaches that are too narrow or too wide are less desirable (and therefore less valuable) than beaches that are somewhere in between. Beaches that are “just right” attract more beach-goers, who need food to eat and hotel rooms to sleep in; people want to buy houses near the beach, pushing up real-estate values. However, shorelines are dynamic, with natural changes in accretion and erosion that cause beach width to fluctuate. If a natural trend in shoreline position is predominantly erosive, then coastal managers may opt for beach replenishment as a mitigation strategy.

Developed coastal areas can thus exhibit a strong relationship between shoreline change and economic dynamics, comprising a coupled human–landscape system in which beach replenishment is the link between the economics of coastal development and the physical processes of shoreline change.

Via Carlton.edu

  03/28/13 at 11:46am