MAY 10, 2017 3:12 PM PDT

We've reached 410 ppm of atmospheric CO2; now what?

Remember back when the number was 350? 350 parts per million (ppm) of carbon dioxide in the atmosphere was the absolute maximum that our planet could withstand without risking a no-return point of climate change. Well, we’ve definitely passed that tipping point: just last month we reached 410 ppm of atmospheric CO2, surpassing any level that humans have ever seen. On April 18, the Keeling Curve, a University of California San Diego, Scripps Institution of Oceanography program, documented the record at Mauna Loa Observatory in Hawaii, much to scientists’ despair. So, what does that number actually mean for our home?

Photo: Keeling Curve

Well, we reached 400 ppm several years ago, and while scientists say there is nothing that makes 410 and 400 vastly different in how our planet responds, “They give us an opportunity to pause and take stock and act as useful yard sticks for comparisons to the geological record," says University of Southampton palaeoclimate researcher Gavin Foster.

The numbers also help to spur public actions. Although we know by now that climate change is no easy fix, NOAA atmospheric scientist Pieter Tans assured Climate Central that "The rate of increase will go down when emissions decrease.” Of course, he says, “Carbon dioxide will still be going up, albeit more slowly. Only when emissions are cut in half will atmospheric carbon dioxide level off initially."

To cut emissions in half requires extreme dedication from all citizens and governments around the world. While the Paris Climate Agreement was a step in the right direction, countries must continue to fulfill their environmental commitments in order to maintain momentum. Following Science Alert, research shows that by 2100 our global energy supply must be generated by less than 25% fossil fuels. While individual and grassroots movements are springing up around the United States, citizens stand by waiting for their governments to support their environmental activism, hoping to lead their communities on the right paths toward a lower ppm number.

Sources: Climate Central, Scientific American, Science Alert

About the Author
  • Kathryn is a curious world-traveller interested in the intersection between nature, culture, history, and people. She has worked for environmental education non-profits and is a Spanish/English interpreter.
You May Also Like
MAR 23, 2020
Plants & Animals
MAR 23, 2020
These Monkeys Help Wild Deer Avoid Predators
There can be power in numbers, and deer are keenly aware of this. The bulk of wild deer like to travel in large herds be ...
MAR 29, 2020
Earth & The Environment
MAR 29, 2020
Incinerators and landfills breed antibiotic resistant genes
Here’s a compelling reason to start composting: your municipal solid waste is producing airborne antibiotic-resist ...
APR 06, 2020
Earth & The Environment
APR 06, 2020
Shipping pollution changes cloud composition
Research from scientists at the University of Washington suggests that pollution from container ships and other shipping ...
APR 16, 2020
Earth & The Environment
APR 16, 2020
Are monarch butterflies stressed out?
Perhaps in your life you have participated in a project involving monarch butterflies. I can still remember being surpri ...
APR 19, 2020
Earth & The Environment
APR 19, 2020
Enough is enough.
Who are we kidding? All these far-fetched climate change solutions aren’t actually helping anybody – if anyt ...
MAY 24, 2020
Plants & Animals
MAY 24, 2020
The Pistol Shrimp's Secret Weapon...
Pistol shrimp have a unique reputation as one of the ocean’s most intriguing crustaceans. Most are only about the ...
Loading Comments...