Tag Archives: mass extinctions

Oceans heading for mass extinction

    a 2015 study found there is no techno-fix to prevent a catastrophic collapse of ocean life for centuries if not millennia if we continue current CO2 emissions trends through 2050.

A study published in May 2017 tells us that oxygen is depleting in the oceans two or three times faster than expected.

From Think Progress:

    by combining oxygen loss with ever-worsening ocean warming and acidification, humans are re-creating the conditions that led to the worst-ever extinction, which killed over 90 percent of marine life 252 million years ago.

Continue reading Oceans heading for mass extinction

You’ve been warned!

I did have a restful Christmas, albeit wrapped in the warmth of Brisbane’s humidity, but in the still of the night reality has a way of breaking through. I’ll begin with the ending of this story, as it were, by quoting what Carl Sagan said about the photograph of Earth taken from Voyager 1 as it left the Solar System:

That’s here. That’s home. That’s us. On it everyone you know, everyone you love, everyone you’ve ever heard of, every human being who ever was, lived out their lives … Our planet is a lonely speck in the great enveloping cosmic dark. In our obscurity — in all this vastness — there is no hint that help will come from elsewhere to save us from ourselves.

Here’s the pic:

Voyager pic_4wq9db2n-1368400770_500

That’s from a article by Andrew Glikson done back in May as CO2 levels in the atmosphere of 400 parts per million were recorded by the National Oceanic and Atmospheric Administration.

Glikson highlights the changes this implies when the full effects become apparent, according to the paleo record when CO2 levels were similar in the Pliocene: Continue reading You’ve been warned!