Scientists find widespread ocean anoxia as cause for past mass extinction

 Earth News  Comments Off on Scientists find widespread ocean anoxia as cause for past mass extinction
May 232018
 

… large-scale ocean circulation and led to decreased deep-ocean oxygenation and, enhanced nutrient fluxes, which caused phytoplankton blooms and expanded the areas of low oxygen concentrations. These results also provide the first evidence for …

ocean oxygen – Read More…

Multiple Choices Exist for Changing Ocean Oxygen Concentrations

 Earth News  Comments Off on Multiple Choices Exist for Changing Ocean Oxygen Concentrations
May 182018
 

Each day, journal editors, including the team at Journal of Geophysical Research: Oceans, make binary decisions with submitted articles—to publish, or to decline. So too do authors: faced with the need to have a tidy conclusion to a research paper, they …

ocean oxygen – Read More…

Ocean risks a wake-up call for policymakers – IUCN report

 Earth News  Comments Off on Ocean risks a wake-up call for policymakers – IUCN report
May 082018
 

… temperatures and other stressors such as ocean acidification – the decrease in pH of the ocean – and deoxygenation – a reduction in the amount of oxygen dissolved in the ocean – on the marine environment and human life, and their potential …

ocean oxygen – Read More…

An ocean dead zone the size of Florida was just discovered in the Arabian Sea, and it could have ‘dire consequences’ for humanity

 Earth News  Comments Off on An ocean dead zone the size of Florida was just discovered in the Arabian Sea, and it could have ‘dire consequences’ for humanity
May 032018
 

Researchers measured the world’s largest ‘dead zone’ in the Arabian Sea. It’s the size of Florida. Dead zones are areas of the ocean with low oxygen that can no longer support marine life. It’s caused by warming oceans and agricultural runoff. “The ocean …

ocean oxygen – Read More…

Tiny microenvironments hold clues to ocean nitrogen cycle

 Earth News  Comments Off on Tiny microenvironments hold clues to ocean nitrogen cycle
Apr 282018
 

“The previous understanding of the nitrogen cycle was that nitrogen was lost from the ocean only in three regions where oxygen is scarce. If we wanted to predict how the nitrogen cycle would respond to climate change, all we needed to do was predict how …

ocean oxygen – Read More…

Tiny microenvironments in the ocean hold clues to global nitrogen cycle

 Earth News  Comments Off on Tiny microenvironments in the ocean hold clues to global nitrogen cycle
Apr 232018
 

A new study shows that nitrogen-feeding organisms exist all over the deep ocean, and not just in large oxygen-depleted ‘dead zones,’ changing the way we think about the delicate nitrogen cycle. Nitrogen is essential to marine life and cycles throughout the …

ocean dead zone – Read More…

Ocean temps stabilize as marine heatwave ‘the Blob’ retreats

 Earth News  Comments Off on Ocean temps stabilize as marine heatwave ‘the Blob’ retreats
Mar 232018
 

“If you look in the North Pacific, the deep water is still very warm,” Toby Garfield said. “Which means there’s still a lot of heat being stored.” In addition, last summer, there was a major low-oxygen event that caused crab die-offs. Warm water …

ocean oxygen – Read More…

Self-driving robots collect water samples to create snapshots of ocean microbes

 Earth News  Comments Off on Self-driving robots collect water samples to create snapshots of ocean microbes
Mar 082018
 

Ocean microbes produce at least fifty percent of the oxygen in our atmosphere while removing large amounts of carbon dioxide. They also form the foundation of marine food webs, including those that support global ocean fisheries. Edward DeLong and David …

ocean oxygen – Read More…

Dealing with Dead Zones: Hypoxia in the Ocean

 Earth News  Comments Off on Dealing with Dead Zones: Hypoxia in the Ocean
Feb 262018
 

When water runs off of farmland and urban centers and flows into our streams and rivers, it is often chock-full of fertilizers and other nutrients. These massive loads of nutrients eventually end up in our coastal ocean, fueling a chain of events that can …

ocean dead zone – Read More…

The Ocean Breathes So We Can, Too

 Earth News  Comments Off on The Ocean Breathes So We Can, Too
Feb 262018
 

Q. How much of the oxygen that we breathe is generated by marine life, rather than by terrestrial vegetation? A. Marine organisms, especially photosynthetic phytoplankton and algae, are responsible for more half of our atmospheric oxygen, according to the …

ocean oxygen – Read More…