Saturday, April 13, 2019

Nautical chart of the Port of Alexandria, Egypt

This is a rare French nautical chart or map of Alexandria, Egypt dating to 1867 (updated to 1882). Prepared by the French Depot des Cartes et Plans de la Marine, this map offers extraordinary detail both inland and at sea.
In the harbor there are countless depth soundings in meters, sailing notations, and references to shoals, lights, and navigational points.
Inland there is a wealth of information regarding the city proper, important buildings, topography, gardens, streets, palaces, walled fortifications, and surrounding villages.
Detailed textual sailing instructions in the lower right quadrant. 
original source : Geographicus

2019 (UKHO map)

Friday, April 12, 2019

Canada CHS layer update in the GeoGarage platform

 61 nautical raster charts updated & 1 new chart added

Sea anemones are eating the plastic microfibers that your laundry is releasing into the oceans

New research shines the spotlight on a new plastic pollution menace -- microfibers.
By 2050, the World Economic Forum predicts that the amount of plastic in the oceans will outweigh ALL the fish.
When you hear “plastic” pollution, you might picture six-pack rings wrapped around seagulls or beaches littered with plastic bottles.
But now, researchers are discovering a new menace -- microfibers.
They’re tiny strands of synthetic fibers.

 From Forbes by Priya Shukla

Approximately 60% of the clothing we wear consists of synthetic fibers made from plastic including acrylic, nylon, and polyester.
These ubiquitous fibers are used in everything from moisture-wicking athletic pants to insulated winter coats.
While convenient, thousands of these plastic microscopic fibers ("microfibers") - which are too small to be caught by a dryer lint trap - are often shed when the clothes are washed, causing them to end up in our waterways and add to plastic pollution in the oceans.

"Microfibers are a sub-category of microplastics that originate from items like clothes, carpets, furniture, fishing line and fishing nets, and cigarette butts, " says Nicholas Mallos, director of Ocean Conservancy’s Trash Free Seas® program, "They are essentially any synthetic fiber that is less than 5 millimeters in size."

Because nearly 1 million of these fibers are released when polyester fleece is washed, outdoor clothing brand Patagonia has committed to researching microplastic pollution in the ocean.
And, a new study shows that sea anemones - which are close relatives of corals - are taking up these microfibers.

"[Because] the shape of microfibers differ from other types of microplastic the effects ...
[on] marine organisms may also be different,"says Dr. Manoela Romanó de Orte, a postdoctoral researcher at the Carnegie Institution for Science and lead author of this study, "We will only be able to understand these differences if we perform studies with microfibers separately from microplastics."

Fluorescent plastic microfibers that have been ingested by a bleached sea anemone, Aiptasia pallida.
Dr. Romanó de Orte

Like corals, when anemones become stressed from unusually warm temperatures, they can also become bleached, lose their coloration, and evict the microscopic algae they harbor that provide them with nutrients.
In this study, researchers fed bleached and healthy anemones nylon, polyester, and polypropylene microfibers alone and intermixed with brine shrimp.

According to Dr. Romanó de Orte, "Since plastic pollution is not happening alone, but together with other threats such as global climate change, studying the interaction between these two stresses is important to understand the real-world challenges that coral reefs face."

Dr. Romanó de Orte

When combined with brine shrimp, 80% of bleached and healthy anemones ingested all of the different microfibers.
However, once the microfibers were ingested, healthy anemones were able to eject the microfibers from their bodies more quickly than their bleached counterparts.
This suggests that warming oceans may reduce anemones' or corals' abilities to expel microfibers from their bodies.

"We know that filters on washing machines are highly effective (>80%) at preventing fibers from leaking into the wastewater stream and ultimately the marine environment," says Mallos, "We still need to find ways to divert and capture microfibers outside of the laundry cycle, at the production phase ... and we should also work to make materials that shed less."

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Thursday, April 11, 2019

This is what a planet-wide network of ocean sanctuaries could look like

Current protected area of world's oceans

Future marine sanctuaries?
Projected protection zones in world's oceans by 2030
see Interactive map
Images: Greenpeace

From World Economic Forum
 
What comes to mind when you think of the high seas?
Pirates, whales, giant squid and great white sharks?

Long the subject of stories and myths, life in the oceans beyond territorial waters is far from picture perfect.
Under threat from climate change, acidification, overfishing, pollution and deep-sea mining, the area is now a focus for international scientists, who want to limit exploitation with ocean sanctuaries.

“Extraordinary losses of seabirds, turtles, sharks and marine mammals reveal a broken governance system,” said Professor Callum Roberts, a marine conservation biologist at the University of York.
“Protected areas could be rolled out across international waters to create a net of protection that will help save species from extinction and help them survive in our fast-changing world.”

The researchers broke down the global oceans – which cover almost half the planet – and mapped the distribution of 458 different conservation features, including wildlife and habitats.
They considered hundreds of scenarios for what a planet-wide network of ocean sanctuaries could look like, before putting together a plan for at least 30% to become ocean sanctuaries.



The resulting report, titled 30×30: A Blueprint For Ocean Protection, is a collaboration between the University of York, the University of Oxford and Greenpeace.
It comes as the United Nations prepares to vote on an international legally binding instrument for the conservation and sustainable use of marine biological diversity of areas beyond national jurisdiction.

It matters, not only for the protection and preservation of our ecosystems, but also because marine life captures carbon at the surface of the high seas and stores it deep below, a mechanism that if lost would result in our atmosphere containing 50% more carbon dioxide.

At this year’s World Economic Forum Annual Meeting in Davos, the Friends of Ocean Action brought together entrepreneurs, innovators and scientists to discuss high-impact, large-scale solutions that could make the seas healthier.

Work like this, and the 30% plan, could help safeguard the future.
“What’s so exciting about this research is that it shows that it is entirely possible to design and create a robust, planet-wide network of ocean sanctuaries,” said Dr Sandra Schoettner from Greenpeace’s Protect the Oceans campaign.
“These wouldn’t just be lines drawn on a map, but a coherent, interconnected chain of protection encompassing wildlife hotspots, migration corridors and critical ecosystems.”


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