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Expedition 401 is headed its way to its first drilling site off the coast of Portugal. During the 5-day transit from Amsterdam, Netherlands the science party is working on studying background information for the cruise. This expedition focuses on Messinian Salinity Crisis evaporites, aka the salt giant, that formed millions of years ago in the Mediterranean Sea.

What the heck is a salt giant?

Salt giants are made of huge salty rocks known as evaporites. The salt comes from seawater as the water evaporates. When part of the ocean separates from the rest of world’s oceans, the water in the isolated area can begin to evaporate and leave salt deposits behind. These deposits then form a large salt mass that we call a salt giant. The salt giant found in the Mediterranean Sea is made of mostly halite, the same salt you would find at the dinner table!

How’d it get there?

The salt giant found in the Mediterranean Sea was created after two gateways, one in southern Spain and one in Morocco, between the Mediterranean and Atlantic grew narrower and narrower until they closed. This blocked the exchange. As a result, the Mediterranean sea level fell by hundreds of meters and the water became so salty that a layer of salt crystals more than 1,500 meters thick formed across its seafloor.

Why is this one so different?

Despite happening millions of years ago, the Messinian Salinity Crisis (MSC) is special because it produced one of the youngest of Earth’s salt giants. The salt giant Expedition 401 is looking at comes from the Cenozoic Era or “New Times” in Greek. The Paleozoic Era or “Old Times” and Mesozoic Era or “Middle Times” are significantly older! Salt giants from the Paleozoic Era formed more than 560 million years ago, and the salt giant from the Mediterranean Sea formed about 6 million years ago. To our 4.6-billion-year-old Earth, the MSC was just yesterday.

An image of a world map showing the large evaporites across the Earth. The map is color coded. Green evaporites are from the Paleozoic Era, Blue are from the Mesozoic Era, and Yellow are from the Cenozoic Era. The yellow evaporites are all above Africa near the Mediterranean Sea. There are lines pointing to four of the yellow evaporites that lead to a label that reads: Messinian Salinity Crisis evaporties.
(Modified from Warren. 2010 Credit: Fadl Raad)

Wait, but why is water there now?

The Mediterranean today survives thanks to a new connection with the Atlantic Ocean. Although the two previous gateways closed, a new one opened. Around 5.5 million years ago, scientists believe that a cataclysmic flood reconnected the Atlantic with the Mediterranean Sea, terminating salt giant formation and transforming the Mediterranean into what we see today.

Okay, but why do I care?

These events in the Mediterranean impacted global climate by changing both the chemistry of the global ocean and the patterns of how the water moves around the world. This is called thermohaline circulation.  Thermohaline circulation is controlled by the temperature (thermo) and salinity (haline) of different water bodies. Water flowing out of the Mediterranean during formation of a salt giant it was much more salty than normal seawater. These changes occurred during an episode of planetary cooling. By having a better understanding of what happened during the MSC, we also get a better understanding of how our climate behaves.

Source: Onboard Scientist, Fadl Raad

Featured Image from: SaltGiant-etn.com

GETTING SALTY IN THE MEDITERRANEAN

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Ocean Acidification

How Will IMPAA Impact Shipping Trade Routes?

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In recent months, U.S. trade has been at the forefront for many of us. But also, for many of us, when our packages show up at our door, we often forget the journey these items take, me included. When I began working on shipping emissions, I was astonished to learn that more than 90% of global trade moves via ocean transport. As you read this, there could be more than 50,000 ships crossing the ocean or loading/unloading at ports around the world. Shipping has a major role in our economy, but it also has an equally large impact on the air we breathe, our climate and the health of our ocean.

Ships often run on some of the dirtiest fuels to get them from point A to point B, and they continue burning those fuels when they are docked in our ports. Think of an idling truck waiting in a parking spot—the engine is still running, and the exhaust system is pushing out those dirty black fumes into the air. For the shipping sector, vessels spew an estimated 1 billion metric tons of greenhouse gases every year. These dirty fumes have a huge impact on our health, our ocean and our environment. This pollution causes an estimated 250,000 premature deaths and six million childhood asthma cases globally each year—disproportionately impacting portside communities, which are often overburdened economically. According to the EPA, 39 million people in the United States live close to a port. This means more than 39 million people are directly breathing air that leads to these respiratory diseases, cardiovascular issues and other health problems. But there are solutions to these problems, and we all have the power to push them forward.

One proposed solution is offered by the International Maritime Pollution Accountability Act (IMPAA), which was introduced in Congress last session by Representatives Doris Matsui (D-CA) and Kevin Mullin (D-CA) in the House and Senator Sheldon Whitehouse (D-RI) in the Senate. This bill empowers the EPA to levy pollution fees on large marine vessels offloading cargo at U.S. ports, including a $150-per-ton maritime carbon fee and fees for emission of nitrogen oxides, sulfur dioxides and fine particulate matter. In turn, if passed, this solution would raise an estimated $250 billion over 10 years that would provide critical funding—for instance, modernizing the Jones Act fleet, revitalizing U.S. shipbuilding, decarbonizing the maritime economy and addressing pollutants in port communities along our coasts and in the ocean. 

Shipping emissions

While there have been concerns about fees like this driving ships away from our ports, re-routing to countries like Canada and Mexico, and using trucks or rail to import goods, a new study commissioned by Ocean Conservancy examines this potential for mode shift, and the findings should ease concerns. In fact, findings indicate that in the case of IMPAA fees, the potential for ships to divert from U.S. ports is low for the majority of routes. Actually, most established routes remain economically and environmentally favorable despite these additional pollution fees. This is great news for our ports, our communities and the future of clean shipping in the U.S. With policies that work in tandem to limit emissions from ships (via the Clean Shipping Act) and charge vessels for their pollution, we can push shipping to a zero-emission future and the industry to greener practices.

We look forward to this important piece of legislation being reintroduced in this Congress. In the meantime, check out Ocean Conservancy’s action center and demand climate action that supports a clean-energy transition!

Read more from our new study here!

The post How Will IMPAA Impact Shipping Trade Routes? appeared first on Ocean Conservancy.

How Will IMPAA Impact Shipping Trade Routes?

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Ocean Acidification

The Latest Offshore Oil and Gas Policies that Threaten Our Ocean

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Offshore oil drilling is a dirty, risky endeavor.

The Deepwater Horizon disaster is perhaps the most dramatic example of how offshore drilling can go wrong. Fifteen years ago this month, the Deepwater Horizon oil rig exploded approximately 40 miles off the coast of Louisiana, taking the lives of 11 oil workers and causing the release of an estimated 210 million gallons of oil into the ocean.

Even when offshore oil operations go as planned, they harm our ocean by causing chronic water and air pollution, littering the seafloor with disused pipelines, and contributing to harmful emissions that worsen the impacts of climate change.

Despite these well-known risks and dangers, the administration and pro-oil members of Congress are moving swiftly to open more areas of our ocean to offshore drilling and remove regulations and policies that protect marine life, promote safety and discourage harmful greenhouse gas emissions.

Between the speed and and volume of actions the administration has taken, it can be easy to miss the threats on offshore oil and gas drilling specifically. Let’s break it down:

On day one of his second term, President Trump moved to open vast areas of our ocean to offshore oil and gas leasing and drilling. President Trump signed two executive orders that purported to open huge swaths of our ocean to offshore oil and gas leasing, including waters off the Atlantic and Pacific coasts, in the Northern Bering Sea, and in the Beaufort and Chukchi seas of the Arctic Ocean. Previous presidents had placed these areas off-limits to oil and gas leasing, and it is not clear whether the administration has the legal authority to rescind those protections.

Following this executive action, the new Secretary of the Interior issued orders that set the stage for a series of pro-oil policy and regulatory changes. Shortly after assuming office, Secretary of the Interior Doug Burgum issued a Secretarial Order requiring agencies under his authority to develop plans to “suspend, revise, or rescind” key programs, regulations and policies. The Secretarial Order puts in jeopardy policies designed to reduce risk to marine life, decrease the government’s exposure to financial risk and increase the safety of offshore operations, including:

  • Permits that require mitigation measures designed to protect threatened and endangered species in waters where most offshore oil and gas activity takes place.
  • Regulations that help ensure the owners of offshore oil and gas leases have the financial resources necessary to clean up their equipment after they finish their oil and gas operations.
  • Safety regulations designed to minimize the risk of dangerous blowouts and other “loss of well control” incidents.
  • The current nationwide five-year offshore leasing program that limits potential new offshore oil and gas leasing to just three lease sales between 2024 and 2029—a record low number.

Pro-oil members of Congress are also taking or considering steps to encourage and expedite offshore drilling. Because of the filibuster, a 60-vote supermajority is required to pass most legislation in the U.S. Senate. However, certain types of legislation—including the budget reconciliation process and legislation passed under the Congressional Review Act—require only a bare majority for passage. Pro-oil members of Congress are taking advantage of these special legislative processes to attempt to push through legislation that favors offshore drilling.

Offshore drilling

  • Members of Congress have discussed using the budget reconciliation process to pass legislation that would require the government to hold new offshore oil and gas lease sales in specific areas of the ocean. If existing executive-branch safeguards conflict with future legislatively mandated offshore oil and gas lease sales, the legislatively mandated lease sales would likely prevail. 
  • Under the Congressional Review Act, the House and Senate  passed legislation to undo a regulation that imposed a fee on emission of methane—a powerful greenhouse gas—from oil and gas production facilities, including some offshore facilities. They also passed legislation to repeal Department of the Interior regulations designed to better protect archaeological resources from impacts caused by offshore oil and gas drilling. President Trump signed both bills into law in mid-March.

These actions represent real threats to our ocean, the people and marine life that depend on it and on our global climate.

At Ocean Conservancy, we actively oppose these short-sighted and dangerous attempts to expand offshore oil drilling, remove environmental protections and reduce safety standards. The United States and the world must move away from risky and dangerous offshore drilling and toward 100% clean-ocean energy. We will continue to work with our partners, members and supporters to accelerate the phase-out of offshore oil and gas, advance responsible offshore wind and other marine renewable energy, address the root causes of climate change, and protect our ocean and the people and marine life that depend on it. Take action with Ocean Conservancy and join the movement to protect our ocean, forever and for everyone.

The post The Latest Offshore Oil and Gas Policies that Threaten Our Ocean appeared first on Ocean Conservancy.

The Latest Offshore Oil and Gas Policies that Threaten Our Ocean

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Ocean Acidification

Master of Disguise: The Decorator Crab

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Imagine yourself snorkeling through a lush kelp forest off the coast of Southern California. Sunlight filters through the dense canopy of the forest, casting shimmering patterns on the rocky seafloor below. The underwater world appears peaceful and still—until your gaze falls on what seems to be an ordinary-looking rock.

Then… the rock moves.

At first, you assume it’s just the ocean’s current shifting the rock. But as you take a closer look, you realize it’s not a rock at all. It seems to be a crab, expertly hidden with bits of algae from its surroundings. Meet the decorator crab: a master of disguise and possibly the most stylish and secretive crab in our ocean.

What are decorator crabs?

Decorator crabs constitute several species of crabs that belong to the superfamily Majoidea, a group of crustaceans with a remarkable talent for camouflage. They use tiny, hook-like structures on their shells to attach pieces of algae, seaweed and other marine debris onto their bodies. But this isn’t just a quirky fashion statement—these natural accessories help decorator crabs avoid predators, like pacific halibut, octopuses and sea otters, by blending in with their surrounds. 

If they move to a new environment, decorator crabs will adapt their wardrobe to match. Some take their disguises a step further, attaching living organisms like sponges and venomous anemones to their carapaces—the hard upper shell that protects the crab’s vital organs. This not only helps the crabs blend in but also offers an extra layer of defense. Even when they shed their exoskeleton in a process called molting, some crabs will carefully transfer their decorations to their fresh shell.

Decorator Crab

You can also identify decorator crabs because they are decapods, meaning they have ten legs—two pinchers for feeding and four additional pairs of legs for walking. Decorator crabs are primarily omnivores and use their pinchers to pluck small algae out of crevices and off the sea floor. 

Decorator crabs are solitary animals for most of the year outside of mating season from May to September. You’ll find decorator crabs in shallow coastal waters around the world, from coral reefs and rocky shorelines to kelp forests, seagrass beds and tidal pools. You may have to keep a close eye out for decorator crabs, though, as their average size is only three to five inches across their leg span.

How can you help decorator crabs?

While decorator crabs aren’t currently endangered, they depend on a thriving ocean to survive. Like all marine life, they face threats from pollution, habitat destruction and climate change. Protecting our ocean means protecting creatures like them.

Ocean Conservancy is dedicated to safeguarding our ocean from today’s greatest challenges, from plastic pollution to climate change. But we can’t do it alone. Visit the Ocean Conservancy Action Center to learn how you can help defend our ocean, its wildlife and the communities that depend on it.

The post Master of Disguise: The Decorator Crab appeared first on Ocean Conservancy.

Master of Disguise: The Decorator Crab

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