Saturday, October 5, 2019

Weekly Arctic Sea ice age with graph of ice age by area: 1984 - 2019



This visualization shows the age of the Arctic sea ice between 1984 and 2019. Younger sea ice, or first-year ice, is shown in a dark shade of blue while the ice that is four years old or older is shown as white.

A graph displayed in the upper left corner quantifies the area covered sea ice 4 or more years old in millions of square kilometers.
One significant change in the Arctic region in recent years has been the rapid decline in perennial sea ice.
Perennial sea ice, also known as multi-year ice, is the portion of the sea ice that survives the summer melt season.
Perennial ice may have a life-span of nine years or more and represents the thickest component of the sea ice; perennial ice can grow up to four meters thick.
By contrast, first year ice that grows during a single winter is generally at most two meters thick.
This animation shows the seasonal variability of the ice, growing in the Arctic winter and melting in the summer.
In addition, this also shows the changes from year to year.
A graph in the upper left corner the quantifies the change over time by showing the area covered by sea ice that is 4 years old or older in millions of square kilometers.
This graph also includes a memory bar - the vertical green bar that indicates the maximum value seen thus far in the animation for the given week being displayed.
For example, when viewing the sea ice age for the first week in September, the memory bar will display the maximum value seen for the first week of September in all prior years from the beginning of the animation (1984).
In addition, a violet bar indicates the weeks's average area covered by sea ice greater than 4 years of age during the the 20-year time period from 1984 through 2003.
Note that data for the sea ice age is not available along the coastlines.
The region where data is not available is shown in a dark lavender color.
Visualizers: Cindy Starr (lead), Horace Mitchell

Arctic sea ice likely reached its 2019 minimum extent of 1.60 million square miles (4.15 million square kilometers) on Sept. 18, tied for second lowest summertime extent in the satellite record, according to NASA and the National Snow and Ice Data Center.
The Arctic sea ice cap is an expanse of frozen seawater floating on top of the Arctic Ocean and neighboring seas.
Every year, it expands and thickens during the fall and winter and grows smaller and thinner during the spring and summer.
But in the past decades, increasing temperatures have caused marked decreases in the Arctic sea ice extents in all seasons, with particularly rapid reductions in the minimum end-of-summer ice extent.
The shrinking of the Arctic sea ice cover can ultimately affect local ecosystems, global weather patterns, and the circulation of the oceans.

Friday, October 4, 2019

Maritime navigation : France chooses EGNOS to improve services for sea users

The DGPS stations of the interregional maritime directorates, located along the French coast, provide mariners with an enhanced radionavigation service, improving GPS positioning accuracy. 
To modernise and improve the efficiency of the system, the Directorate of Maritime Affairs has chosen to use the European EGNOS service ("European complementary service for geostationary satellite navigation"), originally developed for the air transport sector and based on a set of ground stations with correlated data.
credits : MTES-Terra, Laurent Mignaux

From EGNOS

Satellite-based systems have greatly changed maritime navigation.
Most vessels, from sail boats to merchant ships or tankers, now have systems on board that rely on satellites for positioning.
In France, DGPS stations are distributed along the coastline to enhance radio navigation for seafarers.
In a context of new investment decisions, French maritime authorities chose EGNOS to upgrade their satellite-based services for radio navigation.
This is a first for the maritime sector.

For 15 years, six DGPS stations have been deployed all along the French coastline, providing sailors and merchant shippers with enhanced satellite-based radio navigation services.
The stations have made it possible to provide vessels equipped with GPS systems with precise positioning, especially in narrow waterways, as well as indications of signal quality.
But those stations have become outdated, suffering from frequent breakdowns due to ageing equipment.



Cutting-edge technology, at a low cost


To upgrade and improve the system’s efficiency, the French authorities have chosen EGNOS.
The aim was to find a solution enabling them to maintain high standards of quality while
responding to the criteria set by the International Maritime Organisation (IMO).
A cost-benefit analysis, led by the Cerema (The French centre for expertise and studies on risks, environment, mobility and urban development) showed that replacing the existing DGPS stations would have been much more expensive and less effective compared to the EGNOS solution, which appeared to be an innovative solution with limited costs.

The first station to be equipped with an EGNOS- based solution was Olonne on the Atlantic coast. Launched in June 2017, the experiment showed significant results complying with the international standards and in particular with the IMO A.1046(27) resolution.

Today, four EGNOS-based stations are in service (Olonne and Point de Buis in Brittany; Héauville on the channel coast and Porquerolles in the Mediterranean region).
Two additional stations are expected to become operational in 2020 (Béar in  the Mediterranean region and Cap- Ferret in the Atlantic region).

Operating costs total some €500,000 over three years; a service quality (in particular in terms of hardware quality), while minimising risks (jamming or cyberattacks for instance).
Further evolutions are expected with upcoming versions of EGNOS.

 "France is the first country to use ehe EGNOS technology in the maritime sector on such a scale"
"Satellite-based augmentation systems make navigation more  accurate, reliable and available, thus contributing to a safer, more efficient and sustainable maritime sector"
credits : MTES-Terra, Laurent Mignaux  

Enhanced radio navigation service with limited impact on the users 

EGNOS uses geostationary satellites and a network of ground stations to increase the accuracy of existing GPS satellite positioning signals, while providing an “integrity message” that informs users in the event of signal problems.
The constellation of these geostationary satellites provides differential correction data, which are then converted via a specific application based and centralised in Saint-Malo, Brittany.
The data are then transmitted to the users via the Medium Frequency (MF) antennas of the existing DGPS stations.

With this new service, there is no need for the ships to change their GPS receivers: the enhanced signal is received via the existing material.
Ensuring service continuity is thus crucial with total transparency for the users, while offering equivalent, if not better, performance.

Trusted precision and availability: a user- oriented service

All sea users, whether professionals or amateur sailors equipped with GPS, are targeted by this service.
They benefit from a positioning determination service that is accurate, reliable and homogeneous, based on recent technology that was historically used in the aeronautical sector, and all along the French metropolitan coastline.
The entire continental shelf included in the French economic exclusive zone should be covered, with optimal accuracy of 5 meters, thus meeting the most recent international standards (latest IMO resolution).

Today, France is the only country to use the EGNOS technology in the maritime sector on such a scale.

Links :

US (NOAA) layer update in the GeoGarage platform

8 nautical raster charts updated

From Mare Liberum to Mare Legitimum: In pursuit of safe and secure seas

For around three and a half centuries (from the early-17th to the mid-20th) the oceans of the world were dominated by the thinking of Mare Liberum, most closely associated with Hugo Grotius's 1609 publication of that name.
The legal regulation of those oceans was based on the principle of the Freedom of the Seas, which was arguably 'operationalised' through three well known bodies of law: the Law of Sea Piracy; the Laws of War and Neutrality at Sea; and that relating to the notion of Exclusive Flag State Jurisdiction.
While these bodies of law may have served well until the middle of the 20th century, there have been profound changes in the ocean environment – across seven dimension: the political; economic; social; technological; physical; military; and normative – that may require us to adopt entirely new ways of thinking about peace, good order and security at sea.
Perhaps we need to move to a new concept of Mare Legitimum – or 'lawful seas' – that may well cause us to reject entirely the idea that the seas should be 'free'.
This talk discusses whether we are moving from Mare Liberum to Mare Legitimum and whether the 'Freedom of the Seas' should be confined to history.

From Human Rights at Sea

Professor Steven Haines, Professor of Public International Law University of Greenwich and Trustee of Human Rights at Sea presented at the NATO Maritime Operational Law Conference at the Spanish Armed Forces Higher Defence College (CESEDEN), Madrid, on the 24th September 2019.

The following highlights the context and scope of his speech.


While these days I am occupying a chair in Public International Law, I am very much inter-disciplinary in my approach.
My first subject of choice was History and I also have a background in the study of Politics, both domestic and international.
I look at the law but I prefer to do so by placing it within its historical, social, economic, technological and political context.
This panel is devoted to historical developments.
They are important because they provide us with an understanding of how we got to where we are.
It is a mistake, however, to assume that history invariably provides lessons that suggest we should necessarily act in ways we acted in the past.
Far too frequently, an understanding of the history can seduce us into believing that we should do things the way we always have done.
Such intuition comes with risks, however.
Past success is very often the influence that leads us in the direction of future failure.
I am a believer in the value of a bit of counter-intuitive thinking.
It is vitally important that we understand the context, and that is ever changing, sometimes gradually but occasionally surprisingly quickly, catching us unawares.
That is what I am going to focus on this morning.

In The Free Sea (Mare Liberum, published 1609) Grotius formulated the new principle that the sea was international territory and all nations were free to use it for seafaring trade.
Grotius, by claiming 'free seas' (Freedom of the seas), provided suitable ideological justification for the Dutch breaking up of various trade monopolies through its formidable naval power (and then establishing its own monopoly). 
England, competing fiercely with the Dutch for domination of world trade, opposed this idea and claimed in John Selden's Mare clausum (The Closed Sea), "That the Dominion of the British Sea, or That Which Incompasseth the Isle of Great Britain, is, and Ever Hath Been, a Part or Appendant of the Empire of that Island 

I am working today on issues to do with ocean governance.
My study of the historical development of ocean governance and the law that provides its framework has led me to the conclusion that we are in a process of transition from a situation which prevailed for over three centuries, into something quite different.
It seems to me that this requires a fundamentally different approach if we are to arrive at an effective way of managing the future.
My starting point is a period that I refer to as the ‘Grotian Era’.
That is the period from roughly the beginning of the 17thcentury to the middle of the 20th.
If you want conveniently quotable dates, let us say from 1600 to 1950.

This was a unique period in history as far as the oceans are concerned.
It was the era of maritime imperial rivalry.
The maritime empires that were central to this rivalry were, essentially, European: Portugal, Spain, the Dutch, England (and subsequently Britain and its global empire), France and, latterly, Germany, with the extra-European powers of the United States and Japan bringing up the rear.
Their rivalries over 350 years resulted in a uniquely intense period of naval warfare, from the Anglo-Dutch Wars of the 17thcentury to the two World Wars of the 20th, including such general naval wars as the Seven Years War and the Revolutionary and Napoleonic Wars.
Naval wars throughout this period were either in progress or very much in prospect.
In other words, naval war was a constant presence.

There were, of course, naval wars prior to 1600, going back to classical times, but the three and a half centuries of the Grotian Era were especially intense in terms of naval conflict predicated on the needs and demands of imperial rivalry, with a heavy emphasis on economic warfare in both the mercantilist period into the 19thcentury and in the free trade era from the 19thonwards.

I call this period the Grotian Era because it was dominated in philosophical terms by the notion of ‘free seas’, what Grotius termed Mare Liberum.
The oceans were free for all to use for legitimate purpose, including the waging of naval conflict, regarded as a sovereign right throughout that period.
As far as the law was concerned, the foundational principle was that the seas should be subject to minimum regulation consistent with free use.
I suggest that there were three legal pillars that gave meaning to Mare Liberum: the law of sea piracy; the exclusivity of flag state jurisdiction; and the laws of naval warfare.
Piracy was a threat to free use and trade and needed to be eradicated if the seas were to be free for legitimate use.
Only flag states could exercise jurisdiction over their own ships on the high seas.
Finally, for naval warfare to be waged in a legitimate manner, some measure of normative influence was necessary to protect neutral shipping from belligerent interference while allowing the warring states to interfere with each other’s trade as a means of applying economic pressure in pursuit of victory.

The three bodies of law that emerged influenced the normative character of the oceans and they remain influential today.
And navies, especially those of the major maritime powers, base much of their thinking on what drove them during the Grotian Era – they look back on their success then and this has significant influence on their thinking today.
So much for the Grotian Era.

In 1950, the seas were still regulated to a minimum, territorial waters extended the state’s jurisdiction to a mere 3 miles from shore and there was a minimum of regulation for the high seas beyond three miles.
This was about to change, however, and in remarkable ways.
The status quo was about to be overturned and the ocean environment transformed.
It took a short while for the process of change to gain momentum but once it did the results were profound.

One of the advantages of getting older is that one develops a perspective that one did not have in one’s youth.
I first went to sea as a young naval officer while still in my teens, almost fifty years ago.
It was 1972, two years before the Third United Nations Conference on the Law of the Sea was first convened in 1974.
At that time, global maritime trade was a quarter of what it is today – and my navy had four times as many ships as it has now.
I have witnessed a considerable amount of change over the course of the past forty or fifty years.
I have no intention this morning of boring you with the detail – but it is sobering looking back from my perspective today at the profound shifts that have occurred.

In my research I am analysing the ocean environment through detailed examination of its various dimensions.
I use eight headings as an analytic framework: political; economic; technological; social; military physical; institutional; and normative.
Every single one of these has gone through – and continues to experience – substantial and often increasing rates of change.
Each of the eight dimensions has an influence on the other seven.
Let me just mention one or two pertinent facts which may help this audience to comprehend what I mean.

States have proliferated – there are four times as many as there were in 1950 – while maritime empires have all but disappeared.
Navies have similarly proliferated – and the bigger ones are, perhaps surprisingly, much smaller than they were then.
Most navies today are focused on law enforcement within their own coastal zones.
Warfighting may concentrate the minds of those serving in the US Navy and some other second and third rank navies, but the vast majority are not in the serious naval war-fighting league.
Coastal state jurisdiction has extended by a factor of over a hundred – from the former 3 mile territorial limits to the maximum 350 mile limits of the continental shelf.
Law has proliferated, with an increasing number of conventions negotiated, including important regulatory instruments negotiated under the auspices of the International Maritime Organisation.

Despite my years at sea, including in very temporary command of one of my navy’s warships, I would not now be permitted to do the job I once did because I do not have the formalised internationally recognised sea-going qualifications that are now required under STCW.
And that is probably no bad thing because I would not know how to operate given technological advances, I can probably still wield a sextant with effect but would need to be taught how to use the electronic charts and other navaids that are the norm today.
Technology continues to amaze and I am especially interested in the panels later on in the conference on autonomous shipping and the influence of artificial intelligence.
I could go on, and on, and on, believe me!

Mare Liberum

But let me get to the real point of what I am wanting to say.
These days I am very involved with the NGO Human Rights at Sea.
For those of a younger generation I perhaps ought to explain that as a young man in the 1970s and 1980s I was completely unaware and unconcerned with Human Rights Law, which only really took off to the degree we now recognise in the years after the 1990s.
Today, we most certainly should be aware of the millions of people who are at sea as I speak.
I have a provisional estimate of between 30 and 40 million actually at sea now.
They have human rights but there are serious shortcomings in the arrangements for ensuring they are recognised and complied with.
This is unfortunate because far too many seafarers are living and working under dreadful conditions, people are being trafficked and others are being used as slave labour on board fishing boats operating thousands of miles from their base ports.
Maritime crime is on the increase and people are victims of it at sea every day.
As Brian Wilson remarked to me recently, the high seas are the largest crime scene in the world.

For three hundred years and more the fundamental foundation principle was Mare Liberum.
We have heard already at this conference about the need for ‘free seas’ and freedom of navigation.
That is the received wisdom.
I used to rely on that received wisdom myself and I cannot blame others for continuing to do so.
But, as John Maynard Keynes used to say ‘When the facts change, I change my mind’.
And the facts have most certainly changed.
Today I am of the view that, while Mare Liberum was probably a very sensible foundational principle over the course of relatively recent history, today it is becoming less and less appropriate given a serious need for good order at sea.

We all need to be able to use the seas for legitimate purpose.
But what is legitimate and what is not is being redefined year on year.
Where previously there was minimum regulation consistent with free use, today there are very necessary layers of evolving regulatory systems applying at sea.
There are also plenty of people determined to breach those regulations and benefit from the proceeds of criminal activity.
They threaten the security of those who wish to use the seas for legitimate purpose.

I am convinced, indeed, that rather than ‘free seas’, we need safe and secure seas on which good people can go about their lawful business.
I like the notion of ‘lawful seas’ – and have even given it a Latin tag.
My message is that we need to shift our thinking from Mare Liberum to Mare Legitimum.

The vast majority of us here for this conference are in some way focused on navies and their roles.
We are either still serving in uniform, retired from having done so, or are in some other way concerned with the ways in which navies go about their business and have a concern with the law that regulates their operational activities.
We need to question our devotion to the old Grotian Era bodies of law seriously to assess their continuing value.


The old Law of Sea Piracy is wholly inadequate for dealing with general criminality at sea, something that has at least been recognised by the development of such instruments as the SUA Convention – though that is far from perfect.
Some older definitions of piracy included the conduct of the slave trade, with my own navy having long been proud of its record in suppressing it in the 19thcentury.
What are navies doing today to suppress the slave trade and the use of slave labour, in the fishing industry in particular?
The answer to that is ‘very little’ – indeed, I shall go further than that and say ‘nothing’..

Is the prevention and prosecution of maritime criminality helped or hindered by the old principle of exclusive flag state jurisdiction?
Just a few weeks ago, an eighteen year old Italian man was accused of sexually assaulting a seventeen year old British girl on board a Panamanian registered cruise ship in the Mediterranean.
The alleged crime was investigated here in Spain where the ship next docked, the accused was taken before a Spanish court, which then dismissed the case for lack of jurisdiction.
The accused was unable to defend himself and – arguably more important – the alleged victim had her right to justice and effective remedy denied.
I have no evidence that the flag state is doing anything at all to exercise jurisdiction.
That being the case, there is an obvious and blatant shortcoming in the law.
We should all be profoundly concerned about this and the myriad other abuses and injustices being experienced at sea on a daily basis.


My message is that we all need to consider seriously what needs to be done to render the seas well regulated, to enforce the law that does exist, and to take steps to ensure a safe and secure environment for those who rely on the oceans for their livelihoods.
That is what a modern interpretation of ‘free seas’ should mean.
Sadly, for many with criminal intent, free seas provides an evil opportunity of an anarchic character.
May I urge you all to shift thinking from the traditional notion of Mare Liberum to a new vision of Mare Legitimum.

I stress again, it is not free seas that we need, but safe and secure seas.

Thank you.



Links :

Thursday, October 3, 2019

The Ocean Cleanup is capturing plastic, prepping a larger trash-collecting system

The Great Pacific Garbage Patch is the largest accumulation of ocean plastic in the world and is located between Hawaii and California.
Scientists of The Ocean Cleanup Foundation have conducted the most extensive analysis ever of this area.

From Forbes by Jeff Kart 

Organizers of The Ocean Cleanup have spent years trying to get a system up and running to collect floating plastic from the Great Pacific Garbage Patch, the largest accumulation zone of plastic in the world’s oceans.
They now say a System 001/B is doing the job, and has been collecting a range of plastic debris using the natural forces of the ocean to catch and concentrate the garbage.

The system is the second attempt by the nonprofit, which began its journey seven years ago at a TEDx conference where the concept was presented by CEO and Founder Boyan Slat.
And that means while the group is celebrating, they’re also ready for more setbacks, or as Slat likes to call them: “unscheduled learning opportunities.”
“Something like this has never been done before,” Slat said during an Oct. 2 press conference from Rotterdam in the Netherlands.
“The path of progress wasn’t exactly a straight line.”

Slat says he and his team are proud to share that plastic is being captured, while also noting that the latest update means a System 002 is now being designed.
He and others on the team say they’re not sure when that System 002 will launch, but hope to have more details in a few months.

Plastic retained in front of an extended cork line by System 001/B.
photo : The Ocean Cleanup 

The new cork line setup.
image : The Ocean Cleanup 

The Ocean Cleanup is essentially a big rake that picks up floating plastic, with a goal to clean up 50% of the patch in five years, with a 90% reduction by 2040.

System 001 (aka Wilson) was launched from San Francisco, California, in September 2018, then later brought back when another “unscheduled learning opportunity” happened in the form of an 18-meter end section of the boom that broke off due to a fatigue fracture.

System 001/B was launched in June from Vancouver, British Columbia, and earlier reports showed promise, with tweaks that included a giant parachute anchor to create drag, slow down the system and let winds and waves push in the plastic.
The last hurdle was "overtopping," where plastic overtopped a screen meant to retain it.
That issue was addressed by using buoys to make the screen stick out higher above the water.

System 001/B, including the parachute
photo : The Ocean Cleanup 

Slat said he doesn’t have data to share on how much plastic has been captured by System 001/B so far.
“The objective of this first system wasn’t to collect as much plastic as possible,” he said, but to prove the principles of the project and using the natural forces of the ocean to collect trash.
“We collected quite a lot of plastic,” he added.

Another look at crew sorting the plastic.
photo : The Ocean Cleanup 

But he said the system is collecting all kinds and sizes of plastics, from medium-sized debris all the way down to microplastics as small as 1 millimeter.
Much larger ghost nets associated with commercial fishing also have been removed by the system.
“Now that we have these conclusions, they really have given us sufficient confidence to start the next phase of the development and work toward System 002,” Slat said, adding,
“If the journey to this point has taught us anything, it’s that this is not going to be easy.”

Ghost net being lifted onboard the support vessel during the System 001/B mission.
photo : The Ocean Cleanup

The main element to tackle in getting System 002 out on the ocean is survivability, to design a system that can stay in the water in year-round conditions and for long periods of time, so the plastic doesn’t have to be harvested too often using vessels that cost money to send.
“Right now the plastic is really able to stay in the system for days, possibly weeks,” Slat said, “but we have to go for months or even more than a year to make the economics work.”

Lonneke Holierhoek, the cleanup’s chief operating officer, said System 001/B will remain in the Great Pacific Garbage Patch through the end of November to gather more information for the next stage in the project.
It’s headed back now for a crew change and plans to concentrate near-future efforts in collecting plastic in high-density areas of the patch.
“We expect more challenges, more unscheduled learning opportunities and even more surprises, but our team has proven to be steadfast and very resilient which gives us full confidence for the future,” Holierhoek said, adding thanks to long-term partnersincluding the Dutch government and Maersk.

A bag filled with ocean plastic caught by System 001/B being lifted onboard the support vessel.
 photo : The Ocean Cleanup

Slat recalled his idea being dismissed and ridiculed by some when it was first proposed, and some remain skeptical of the project.

They include Marcus Eriksen, research director of the 5 Gyres Institute.
“All global environmental problems, like the hole in the ozone layer, smog over cities, or tar on the ocean surface, were all solved by an upstream policy solution, and that's what it will take to solve the plastic problem,” Eriksen said in response to the announcement.
“We need to use good science to see beyond the distractions.”

At the time of the announcement, Eriksen was in San Francisco with the San Francisco Bay Institute, announcing a three-year study of plastics in the San Francisco Bay “and the range of preventative solutions that will solve the problem here locally and can be replicated around the globe.
“It's upstream vs. downstream, and this is the fight we're engaged in,” he said in an email.
“We need to move the narrative to prevention.”

Crew members sort plastic into size and type classes onboard the support vessel during the System 001/B mission.
 photo : The Ocean Cleanup

Eben Schwartz, marine debris manager with the California Coastal Commission, has a similar message.
“It’s exciting to hear that The Ocean Cleanup project has made some advances in their design,” Schwartz said.
“However, my concerns remain the same as they have been since this project was first proposed.
“The Ocean Cleanup project, in both their methods and their messaging, ignores the fact that this is a 3-dimensional problem.
Plastics on the surface of the garbage patches are important to address, but they represent less than 3% of the plastic that enters the world’s oceans every single year.
“Plastics are found everywhere—throughout the water column and on the ocean floor.
Our focus needs to be on reducing and preventing the plastic that enters the ocean, while continuing to explore the possibility of long-term cleanup.”

Slat says The Ocean Cleanup still needs support to keep moving forward.
“Funding is always going to be necessary. Even though we’re in a good situation now, working toward scale-up, we’ll need more help.”
He also mentioned vacancies the nonprofit is looking to fill and encouraged people to spread the word about the work.
“The more people that know about what we do, I think the higher probability of success.”

Links :