Tuesday, January 10, 2017

Conflict and diplomacy on the high seas

A Philippine marine swims in the waters of Second Thomas Shoal in the South China Sea.
(AP Photo/Bullit Marquez)

From VOA by Pete Cobus

One-third of global maritime traffic.
An estimated $5 trillion in annual trade. Six claimant nations. One body of water. And that’s just on the surface.
Welcome to the South China Sea, the geographic commons of Southeast Asia’s navigable rimland. Its 3.5 million square kilometers of underlying bedrock contain oil and natural gas deposits that, by official U.S. estimates, are at least equal to Mexico’s and, by some contested Chinese estimates, might be second only to Saudi Arabia’s.
Also home to lucrative fisheries and supply routes that carry 80 percent of China’s crude imports, the territorially disputed region may be the most strategically important waterway of the 21st century.

Tracing shorelines of sprawling, hard-to-govern archipelago nation-states to the south, the sea is bound to the north by China, whose contentious claims to more than 95 percent of the region—first espoused by the nationalist government in 1947—cite ancient maritime records.


Beyond a sign that says  “Nansha is our national land, sacred and inviolable,” Chinese troops patrol artificial terrain in the Spratly Islands, which are known as a Nansha in Mandarin,  February 9, 2016.

For centuries, these waters also have been vital to the economic survival of neighboring Vietnam, Malaysia, Brunei and the Philippines.

The waters are also prized by regional non-claimants.
For U.S.-allied Japan and South Korea, situated far to the north, South China Sea shipping lanes provide access to trade-intensive waters of the Indian Ocean, via which more than half of their respective energy needs are met.
For non-claimant Indonesia, Natuna Sea fishing grounds along the southern fringe of the contested region hold vital natural gas reserves.

Many nations have urged Beijing to abide by the United Nations Convention on the Law of the Sea (UNCLOS), which sets maritime zones of control based on coastlines.
The United States, which has signed onto UNCLOS without ratifying it, often relies on the international agreement to settle territorial disputes.
China has refrained, invoking intertemporal laws based on the deep historical record, such as archaeological findings on disputed reefs and islands.
At best, China views U.N.-backed codes of maritime governance as incompatible with domestic laws; at worst, it sees them as instruments of Western hegemony designed to undercut its expanding influence as a world power.

The U. S. has said establishing a “rule-based order” for the South China Sea, which carries a large portion of the world's maritime freight traffic, is critical to regional security and economic prosperity, both cornerstones of U.S. policy on the Asia-Pacific.
China’s territorial claims in the South China Sea have raised tensions with surrounding countries.
Beijing has been conducting dredging projects on seven disputed formations for nearly two years, creating artificial mini islands.

On the horizon

If Asia’s astonishing economic growth of the past two decades continues, however, regional stability will remain a matter of global consequence.
Beyond China’s increasingly assertive land grabs and island-building campaigns—some 1,300 hectares of tiny islets have been landfilled to sustain mostly military infrastructure, including runways long enough to accommodate bombers—low-level skirmishes between Chinese naval patrols and civilian fishing fleets from neighboring countries could spark international conflict.

In July, a five-judge panel in The Hague unanimously rejected the legal basis of nearly all of China’s maritime claims.
Within weeks, China’s Supreme People’s Court issued a regulation stating a “clear legal basis for China to safeguard maritime order,” in which Beijing vowed to prosecute any foreigners found fishing or prospecting in disputed waters.

 see interactive map on VOA news

Other means of settling complex territorial disputes also appear ineffective.
The Association of Southeast Asian Nations’ long-delayed code of conduct for the South China Sea, which Beijing officials said they would finalize in 2017, would do little to resolve conflicting claims of sovereignty.
Much like the Hague-based tribunal’s ruling, any legally binding ASEAN declaration would lack meaningful mechanisms of enforcement.

While the United States has long said it does not take an official position on South China Sea disputes, it steadily criticizes China’s behavior there and plans to expand defense alliances with countries that have overlapping claims.
By 2021, U.S. Navy officials plan to expand the Pacific Fleet’s overseas assigned forces by approximately 30 percent.

 China's Liaoning aircraft carrier pictured taking part in exercises in the South China Sea last month.
Photo: Reuters

As President-elect Donald Trump takes office, he may be called upon quickly to handle another South China Sea crisis.
Just months into his first term, former President George W. Bush faced an international dispute triggered by a midair collision between a U.S. spy plane and a Chinese fighter jet near Hainan Island.

Less than seven weeks after President Barack Obama took office, Chinese ships and planes confronted the USNS Impeccable, a surveillance ship in waters south of Hainan, and ordered it to leave.
The U.S. said that it had the right to be there and that the ship was harassed, while Beijing defended its actions.
Obama responded by sending a guided-missile destroyer to protect the Impeccable.

Such incidents, engineered or otherwise, are likely to continue defining the dispute as it unfolds in real time.
Until broader questions of maritime sovereignty are resolved, the waterway promises to remain a fulcrum upon which the geopolitics of international trade, and thus the global economy, pivots.
We’ll keep close tabs on developments here as they occur.

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Monday, January 9, 2017

The crack in this Antarctic ice shelf just grew by 11 miles. A dramatic break could be imminent.

Image showing the apparently accelerating advance of the rift, per the Project Midas team
The current location of the rift on Larsen C, as of January 2017. Labels highlight significant jumps. Tip positions are derived from Landsat (USGS) and Sentinel-1 InSAR (ESA) data.
Background image blends BEDMAP2 Elevation (BAS) with MODIS MOA2009 Image mosaic (NSIDC). Other data from SCAR ADD and OSM.

From The WashingtonPost by Chris Mooney

An enormous rift in one of Antarctica’s largest ice shelves grew dramatically over the past month, and a chunk nearly the size of Delaware could break away as soon as later this winter, British scientists reported this week.
If this happens, it could accelerate a further breakup of the ice shelf, essentially removing a massive cork of ice that keeps some of Antarctica’s glaciers from flowing into the ocean.
The long term result, scientists project, could be to noticeably raise global sea levels by 10 centimeters, or almost four inches.
It’s the latest sign of major ice loss in the fast warming Antarctic Peninsula, which has already seen the breakup of two other shelves in the same region, events that have been widely attributed to climate change.
The crack in the ice shelf, known as Larsen C, has been growing at an accelerating rate.
Since the beginning of December, it has grown about 11 miles in length, after extending 13 miles earlier in the year. In total, the rift has grown about 50 miles since 2011 (it’s almost 100 miles long in total), and has widened to well over 1,000 feet.
Now, only 12 miles of ice continue to connect the chunk with the rest of the ice shelf.

Crack Advances Across Antarctic Ice Shelf (acquired August 22, 2016)

When it breaks away, the loss would be of nearly 2,000 square miles of ice, say the researchers with Project MIDAS, a British government-funded collaboration based at Swansea and Aberystwyth universities in Wales.
That’s larger than Rhode Island and almost as big as Delaware.
The consequences of the break could be dramatic.
“When it calves, the Larsen C Ice Shelf will lose more than 10% of its area to leave the ice front at its most retreated position ever recorded; this event will fundamentally change the landscape of the Antarctic Peninsula,” said the researchers in a statement about the rift.
“We have previously shown that the new configuration will be less stable than it was prior to the rift, and that Larsen C may eventually follow the example of its neighbour Larsen B, which disintegrated in 2002 following a similar rift-induced calving event.”

The British Antarctic Survey also released a statement on the growing rift, saying a huge iceberg is “set to calve” from Larsen C.
“Because of the uncertainty surrounding the stability of the Larsen C ice shelf, we chose not to camp on the ice this season,” David Vaughan, the survey’s director of science, said in the statement.
The floating ice shelf is fed by the flow of ice glaciers that sit above sea level on the Antarctic Peninsula. As the shelf loses mass, these glaciers could flow more quickly — which would contribute to rising sea levels. Losses from the ice shelf alone, however dramatic, would not have that effect, as the shelf is already floating on water, just like an ice cube in a glass of water.
Fortunately, the Antarctic Peninsula does not contain nearly as much ice as other, thicker parts of Antarctica, such as the West and East Antarctic ice sheets.
The potential sea level rise if Larsen C is lost would be measured in centimeters, not feet.
Still, it would subtract a major, enduring feature from the planet, and add to already dramatic changes that have been seen in the Antarctic Peninsula, the portion of the icy continent that extends northward towards South America.

Two smaller ice shelves near Larsen C – Larsen A, and Larsen B – have already largely disintegrated. Larsen B retains a remnant of its former size, but scientists have determined that this ice, too, could vanish before too long.
They have also documented that following the collapse of much of the Larsen B ice shelf in 2002, the glaciers behind it sped up their flow towards the sea.
Now, the fear is the same process could be unleashed on the larger Larsen C shelf.
The Larsen C ice shelf is more than 1,000 feet thick, and in spatial extent, nearly the size of Scotland. It is the fourth-largest ice shelf in Antarctica, although nothing compared with the two largest, the Ross and Filchner-Ronne ice shelves.

 An iceberg expected to be one of the 10 largest ever recorded is ready to break away from Antarctica, scientists say. A long-running rift in the Larsen C ice shelf grew suddenly in December and now just 20km of ice is keeping the 5,000 sq km piece from floating away.
Larsen C is the most northern major ice shelf in Antarctica.
Researchers based in Swansea say the loss of a piece a quarter of the size of Wales will leave the whole shelf vulnerable to future break-up.

NASA, during a flight in November, captured several spectacular photos of the rift, including the one at the top of this article and also the close-up below.
But that was before further extension of the rift last month.
The Antarctic continent is ringed with ice shelves, which are the ocean-front portions of larger glaciers.
But as the climate changes, these features have been thinning and in some cases breaking apart dramatically.
The Project MIDAS group did not immediately make a statement attributing the development at Larsen C to climate change, but the fact that the shelf would be “at its most retreated position ever recorded” after the break is certainly suggestive.
Previous research has also documented that the Larsen C ice shelf is becoming less thick, and so floating lower in the water, and this appears tied to the warming of the Antarctic Peninsula in recent decades.
Warmer seas could also be playing a role.

Now, the wait for the anticipated break begins.
Swansea University’s Adrian Luckman, who heads up Project MIDAS, told the BBC that “If it doesn’t go in the next few months, I’ll be amazed.”
Daniela Jansen, a researcher with the Alfred Wegener Institute in Germany who collaborates with the Project MIDAS team, largely agreed in an email to The Washington Post.
“I think the iceberg will calve soon,” she said.
“The jumps of the rift tip occurred in shorter time intervals the longer the rift got. This is probably due to the longer ‘lever’ for the forces acting to advance the rift, such as the up and down of the tides or strong winds towards the sea. Whether it will be months or maybe next year, I don’t know.”

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Sunday, January 8, 2017

NZ Linz update in the GeoGarage platform

6 nautical raster charts updated

Ngalawa Cup: the ocean is calling you

Take the Spice Islands of Tanzania and a dug out canoe with a hanky, mix them together with a healthy dose of chaos and the world's greatest sailing race is born.

www.theadventurists.com/ngalawa-cup-the-what/
Start: Kilwa, Lindi / Finish: Nungwi Beach, Zanzibar / Distance: 300-500km

Saturday, January 7, 2017