Tag Archives: oceans warming

Cost of Climate Change

The Quadra Project – Warming Oceans

The close connection that exists between the atmosphere and the ocean is not surprising considering that 70% of the planet is covered by water—about 360 million km2—and the few dozen km of air is extremely thin compared to the 12,750 km diameter of Earth. This means that about 90% of the atmospheric heating caused by rising concentrations of CO2 is transferred to the oceans.

In approximate terms, about one-third of the carbon dioxide we add to the atmosphere by burning fossil fuels stays there for centuries, about one-third is captured and sequestered in various land forms such as forests, soils and vegetation, although one recent United Nations study suggests the terrestrial sequestration may only be about 25%, possibly because forest and plant cover is being diminished by agriculture and fires, and because a higher global temperature is reducing the photosynthesis process by which plants process carbon dioxide into carbon, sugars and oxygen. Much of the remaining one-third of our CO2 emissions that is not absorbed by marine algae dissolves in the oceans to form carbonic acid.

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Rivers & Oceans

UN manifesto pitches preservation of critical microscopic creatures

Canada’s National Observer, Local Journalism Initiative Reporter

Plankton, the key ingredient of the primordial ocean soup that allows all life to flourish, are central to a new U.N. manifesto highlighting the big role microscopic creatures can play in tackling the globe’s triple threat. 

Plankton are largely ignored in international discussions around preserving the planet from the climate crisis, biodiversity collapse and pollution, said Vincent Doumeizel, senior advisor on the oceans to the United Nations (U.N.) Global Compact.

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Uncategorized

The Quadra Project – Deep Water

By Ray Grigg

When we think about environmentalism, we tend not to consider the oceans because we don’t live on or in them, and they are just there as they have always been, defining the edge of the land that we occupy. Of course, oceans provide us with most of our fish, but in the popular understanding, they are mostly experienced as vast spaces of waves and wet that separate the faraway continents that we visit. So we tend to give much more importance to landscapes that we occupy. And because we live within the thin layer of air that girdles the globe, weather is also a concern to us. But we generally don’t consider that much of our climate and weather is determined by what happens in the oceans.

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Rivers & Oceans

Satellites track the tiny silver fish hugely important to marine life

Canada’s National Observer, Local Journalism Initiative Reporter

A new scientific endeavour has taken to the sky using high-tech drones and satellite images to understand better the annual spring herring spawn vital to salmon and wildlife on the West Coast. 

Between February and March each year, frigid ocean waters transform to a milky tropical-looking turquoise green when male herring release milt to fertilize the countless eggs deposited by females on eelgrass, kelp and seaweed fringing coastal shores.

Unpredictable and dramatic, the small silver fishes’ spawning event is large and best monitored from great heights, said Loïc Dallaire, a researcher with the SPECTRAL Remote Sensing Laboratory at the University of Victoria. 

“It’s one of the very few animal formations that we can see from space, excluding human developments and towns,” Dallaire said. 

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Rivers & Oceans

Baby sockeye salmon are growing faster due to climate change. Is bigger better?

Editor’s note: Most of the salmon on Cortes Island are Chum, not Sockeye, but a DFO study of scale growth measurements from the Big Qualicum River suggests Chum are also being affected by climate change. Chum salmon appear to be growing smaller ‘due to increased ocean temperatures driven by climate change‘ and also the increased competition over a diminishing number of prey. There are also reports of them relocating to more northern locations. In October 2023, a University of Alaska study revealed that 100 Chum had been found in waters emptying into the Arctic Ocean. They were ‘either actively spawning or had finished spawning.’ Lead author Peter Wesley wrote, “Throughout most parts of the salmon’s range, things have gotten too warm and they’re starting to blink off. In the Arctic, the water is getting warm enough and they’re starting to blink on.”

Canada’s National Observer, Local Journalism Initiative Reporter

Climate change has tipped the scales, causing juvenile sockeye salmon in B.C. to grow bigger over the past century. 

The growth of salmon using lakes as nurseries during the first years of life in northern B.C. is about 35 per cent higher than 100 years ago, a new study from Simon Fraser University shows. 

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