The greatest WordPress.com site in all the land!

 

Published on Monday, April 29, 2013 by Common Dreams

Climate Collision Course: CO2 Levels About to Hit 400 PPM

In a first in human history, “it looks like the world is going to blow through the 400-ppm level without losing a beat.”

– Andrea Germanos, staff writer

Concentrations of CO2 are nearing 400 ppm for the first time in human history. (Credit: Scripps Institution of Oceanography) The world is likely days away from a “sobering milestone” in our planetary history.

Concentrations of the greenhouse gas carbon dioxide will likely reach 400 parts per million (ppm) for first time in human history, say scientists at the Scripps Institution of Oceanography, and unless drastic action is taken, we’re on track to hit 450 ppm in the near future.

“I wish it weren’t true, but it looks like the world is going to blow through the 400-ppm level without losing a beat,” said Scripps geochemist Ralph Keeling, whose father Charles David (Dave) Keeling began the “Keeling Curve” to track daily CO2 levels recorded at Mauna Loa Observatory.

The last time the greenhouse gases were at 400 ppm was likely the Pliocene epoch, between 3.2 million and 5 million years ago.

The current reading is at 399.72 ppm — far past the 350 ppm level many, including noted climate scientist James Hansen, have warned is the upper safe limit before the planet hits a tipping point. 

“At this pace we’ll hit 450 ppm within a few decades,” warned Keeling. Indeed, the rate of rise of CO2 over the past century is “unprecedented.”

The figure should serve as a call to act on the deadly emissions caused by our fossil fuel addiction, the scientists say.

“The 400-ppm threshold is a sobering milestone, and should serve as a wake up call for all of us to support clean energy technology and reduce emissions of greenhouse gases, before it’s too late for our children and grandchildren,” said Tim Lueker, an oceanographer and carbon cycle researcher and part of the Scripps CO2 Group.

To keep a watch on the daily levels, you can visit The Keeling Curve website or follow the daily updates via Twitter.

____________________________

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

Tag Cloud

%d bloggers like this: