As the climate warms, sea levels are rising, tropical storms are intensifying, and ocean waters are growing more acidic.
These changes to the oceans have major impacts for people on land, from flooded coastal communities to losses for the fishing industry.
EcoWatch Daily Newsletter
- Attenborough: 'If We Wreck the Natural World, We Wreck Ourselves ... ›
- David Attenborough Gives Stark Warning in New BBC Climate ... ›
- David Attenborough: 'Population Growth Must Come to an End ... ›
- Race to Mine Deep Seabeds, With Unknown Ecological Impacts ›
As the Pacific Ocean becomes more acidic, Dungeness crabs, which live in coastal areas, are seeing their shells eaten away, according to a new study commissioned by the National Oceanic and Atmospheric Administration (NOAA).
Ocean waters off the coast of California are acidifying twice as fast as the rest of the world's oceans, new research shows.
- 'Oceans Are Sending Us so Many Warning Signals': New UN ... ›
- How We're Fighting to Eliminate Plastic in California - EcoWatch ›
- Thousands of 'Penis Fish' Appear on California Beach - EcoWatch ›
By Adrienne Alvord
This week Oregon stands on the cusp of approving historic cap-and-invest legislation, HB 2020, that experts have said will help grow the Oregon economy. After three years of legislative consideration, numerous studies, hearings, public meetings and debate, the Oregon House approved the legislation decisively (36-22) on June 18th, and the bill moved to the Senate Floor, where a vote was expected on June 20th.
Scientific organizations from Commonwealth nations around the world have come together for the first time to urge governments to act on climate change.
The "Consensus Statement on Climate Change"—issued Monday ahead of next month's Commonwealth Heads of Government Meeting in the United Kingdom—is an unprecedented plea signed by the heads of 22 national academies and scientific societies that represent tens of thousands of scientists in Australia, India, Canada, New Zealand, Bangladesh, South Africa, the UK, Pakistan and more.
The recent documentary, Sea of Life, exposes key threats to the oceans, and calls for action.
Sea of Life follows filmmaker Julia Barnes on a three year adventure, spanning seven countries, to save coral reefs.
Although they cover less than 1 percent of the sea floor coral reefs support up to 30 percent of all species in the ocean at some stage in their life cycles. Often referred to as the rainforests of the ocean, coral reefs are one of the most biologically diverse ecosystems on the planet. They're also an indicator for the future of the oceans and all life on Earth.
As ocean waters warm and acidify, corals across the globe are disappearing. Desperate to prevent the demise of these vital ecosystems, researchers have developed ways to "garden" corals, buying the oceans some much-needed time. University of Miami Rosenstiel School marine biologist Diego Lirman sat down with Josh Chamot of Nexus Media to describe the process and explain what's at stake. This interview has been edited for length and clarity.
By Tim Radford
Geoengineering, the deliberate alteration of the planet to undo its inadvertent alteration by humans over the past 200 years, is back on the scientific agenda, with a climate compromise suggested as a possible solution.
One group wants to turn down the global thermostat and reverse the global warming trend set in train by greenhouse gases released by fossil fuel combustion, by thinning the almost invisible cirrus clouds that trap radiation and keep the planet warm.
By Marlene Cimons
They strengthen the corals' foundation by growing over and between gaps in coral reefs, essentially gluing sections of coral together. They provide a surface for baby corals to settle, and serve as food for marine life, including sea urchins, parrot fish and mollusks.
Norwegian businessman Kjell Inge Røkke is not someone usually admired for environmental stewardship. Described by Forbes as a "ruthless corporate raider," Røkke made his billions as the majority stakeholder in shipping and offshore drilling conglomerate, Aker.
Yes, Houston, we have a problem: Our oceans are dying.
As the brilliant futurist Buckminster Fuller used to point out, our Spaceship Earth is hurtling through space at a great speed.
World Meteorological Organization: Ocean Acidification and Greenhouse Gas Emissions Hit Record Levels
The World Meteorological Organization (WMO) reports that the amounts of atmospheric greenhouse gases reached a new high in 2013, driven by rapidly rising levels of carbon dioxide.
The news is consistent with trends in fossil fuel consumption. But what comes as more of a surprise is the WMO’s revelation that the current rate of ocean acidification, which greenhouse gases (GHGs) help to cause, appears unprecedented in at least the last 300 million years.
The details of growing GHG levels are in the annual Greenhouse Gas Bulletin, published by the WMO—the United Nations specialist agency that plays a leading role in international efforts to monitor and protect the environment.
They show that between 1990 and 2013 there was a 34 percent increase in radiative forcing—the warming effect on our climate—because of long-lived greenhouse gases such as carbon dioxide (CO2), methane and nitrous oxide.
The Bulletin reports on atmospheric concentrations—not emissions—of greenhouse gases. Emissions are what go into the atmosphere, while concentrations are what stay there after the complex system of interactions between the atmosphere, biosphere (the entire global ecological system) and the oceans.
About a quarter of total emissions are taken up by the oceans and another quarter by the biosphere, cutting levels of atmospheric CO2.
In 2013, the atmospheric concentration of CO2 was 142 percent higher than before the Industrial Revolution started, in about 1750. Concentrations of methane and nitrous oxide had risen by 253 percent and 121 percent respectively.
The observations from WMO’s Global Atmosphere Watch network showed that CO2 levels increased more from 2012 to 2013 than during any other year since 1984. Scientists think this may be related to reduced CO2 absorption by the Earth’s biosphere, as well as by the steady increase in emissions.
Although the oceans lessen the increase in CO2 that would otherwise happen in the atmosphere, they do so at a price to marine life and to fishing communities—and also to tourism. The Bulletin says the oceans appear to be acidifying faster than at any time in at least the last 300 million years.
“We know without any doubt that our climate is changing and our weather is becoming more extreme due to human activities such as the burning of fossil fuels,” said the WMO's secretary-general, Michel Jarraud.
Running out of time
“The Greenhouse Gas Bulletin shows that, far from falling, the concentration of carbon dioxide in the atmosphere actually increased last year at the fastest rate for nearly 30 years. We are running out of time. The laws of physics are non-negotiable.
“The Bulletin provides a scientific base for decision-making. We have the knowledge and we have the tools for action to try to keep temperature increases within 2°C to give our planet a chance and to give our children and grandchildren a future. Pleading ignorance can no longer be an excuse for not acting.”
Wendy Watson-Wright, executive secretary of the Intergovernmental Oceanographic Commission of UNESCO, said: “It is high time the ocean, as the primary driver of the planet’s climate and attenuator of climate change, becomes a central part of climate change discussions.
“If global warming is not a strong enough reason to cut CO2 emissions, ocean acidification should be, since its effects are already being felt and will increase for many decades to come.”
The amount of CO2 in the atmosphere reached 396.0 parts per million (ppm) in 2013. At the current rate of increase, the global annual average concentration is set to cross the symbolic 400 ppm threshold within the next two years.
Methane, in the short term, is a far more powerful greenhouse gas than CO2—34 times more potent over a century, but 84 times more over 20 years.
Atmospheric methane reached a new high of about 1,824 parts per billion (ppb) in 2013, because of increased emissions from human sources. Since 2007, it has started increasing again, after a temporary period of levelling-off.
Nitrous oxide’s atmospheric concentration in 2013 was about 325.9 ppb. Its impact on climate, over a century, is 298 times greater than equal emissions of CO2. It also plays an important role in the destruction of the ozone layer that protects the Earth from harmful ultraviolet solar radiation.
The oceans currently absorb a quarter of anthropogenic CO2 emissions—about 4kg of CO2 per day per person. Acidification will continue to accelerate at least until mid-century, according to projections from Earth system models.
You Might Also Like