[ The only way to stop this march to a fully tropical globe is to
stop burning gasoline and diesel in our vehicles, and to stop
generating electricity and heating our homes with coal and fossil
gas.]
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SURGING ATMOSPHERIC CO2 HITS LEVEL UNSEEN IN MILLIONS OF YEARS  
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Juan Cole
June 7, 2023
Common Dreams
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_ The only way to stop this march to a fully tropical globe is to
stop burning gasoline and diesel in our vehicles, and to stop
generating electricity and heating our homes with coal and fossil gas.
_

Fire crews battle the 2009 Station Fire. The draft National Climate
Assessment predicts longer and more intense fire seasons. , (Photo:
Justin Sullivan/Getty Images)

 

The National Oceanic and Atmospheric Administration (NOAA) announced
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that parts per million of carbon dioxide in our planet’s atmosphere
averaged 424 ppm in the month of May, reaching a level not seen for
millions of years. In May 2022 it was only 421 ppm so this is a
tremendous jump on a year over year basis. It probably reflects the
resurgence of the world economy as the COVID pandemic has transitioned
to an endemic infection and governments have dropped most prophylactic
measures.

NOAA administrator Dr. Rich Spinrad observed, “Every year we see
carbon dioxide levels in our atmosphere increase as a direct result of
human activity. Every year, we see the impacts of climate change in
the heat waves, droughts, flooding, wildfires and storms happening all
around us. While we will have to adapt to the climate impacts we
cannot avoid, we must expend every effort to slash carbon pollution
and safeguard this planet and the life that calls it home.”

Carbon dioxide is a potent greenhouse gas which prevents the heat of
the sun’s rays from radiating back out into outer space through the
atmosphere at the same rate they used to before the industrial
revolution. Keeping more heat on earth means hotter oceans and more
powerful hurricanes and cyclones, along with hotter air and more
desiccation of soil and forests, leading to more wildfires. Those
newly common wildfires in Canada are now blanketing the US Midwest and
Northeast with heavy smog.

The only way to stop this march to a fully tropical globe is to stop
burning gasoline and diesel in our vehicles, and to stop generating
electricity and heating our homes with coal and fossil gas.

The Scripps Institution of Oceanography
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the University of California San Diego partnered with NOAA, taking its
own measurements at Mauna Loa, and found virtually the same
concentrations of CO2 and the same huge leap since last year this
time.

Civilization has never faced such a high average temperature of the
earth’s surface, which is a direct result of the amount of
greenhouse gases in the atmosphere.

Scripps Oceanography geoscientist Ralph Keeling is in charge of the
Keeling curve created by his father in the late 1950s.He remarked,
“Sadly we’re setting a new record. What we’d like to see is the
curve plateauing and even falling because carbon dioxide as high as
420 or 425 parts per million is not good. It shows as much as we’ve
done to mitigate and reduce emissions, we still have a long way to
go.”

The Scripps site notes that carbon dioxide levels are more than 50%
higher than they were in 1750 before the steam engine and the
Industrial Revolution. There was then about 280 ppm of CO2 in the
atmosphere and it was _cold_.

Here is the scary part. Human civilization is only about 5,000 to
6,000 years old, characterized by the emergence of cities and role
differentiation such that not everyone had to farm– there was room
for blacksmiths and tinsmiths and merchants and astronomers and
story-tellers. People learned to read and write, to record discoveries
and pass them on to the next generation. Elam in Iran and Sumer in
southern Iraq were among the earliest such civilizations.

From that time to this, there were just about 280 ppm of carbon
dioxide in the atmosphere. It sometimes fell a little or rose a little
but it stayed in that range.

We don’t know if a world of 424 ppm CO2 is compatible with
civilization. Civilization has never faced such a high average
temperature of the earth’s surface, which is a direct result of the
amount of greenhouse gases in the atmosphere. Intense hurricanes that
flatten electric and telecommunications lines time and again (see:
Puerto Rico) could be hard on civilization. Flooding of our major
coastal ports could likewise be rather a peril. What if the New York
Public library is inundated?

As Dr. Keeler said, this wasn’t the outcome we expected this year,
and it is not the direction in which we want the planet to go.

The last time there was this much CO2 up there was the Pliocene,
roughly 3-4 million years ago.

I have observed,

“Temperatures in the middle Pliocene
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on average 2-3 degrees C. (3.6 – 5.8 degrees F.) higher than today.
The Arctic was 10 degrees C. hotter than today’s. Seas were roughly
90 feet higher [[link removed]]. Some
places now wet were desert-like. See this link
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what would happen to five cities under this scenario.

This 90 feet sea level rise is therefore almost certainly baked in and
will occur, over the next few hundred years (oceans are huge and cold
and take time to warm up). I wouldn’t buy real estate in Miami or
lower Manhattan with an idea of passing it on to your grandchildren.
Any beachfront property is ephemeral.

The cycles of drought and monsoon flooding
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extreme in the west of North America during the Middle Pliocene, and
we are already seeing some evidence of this deadly one-two punch in
California in the twenty-first century.

And Florida was underwater in the middle Pliocene.

The good thing is that some of the worst consequences of climate
change can still be avoided, if we make a major push to get our energy
from solar panels and wind turbines and to electrify our
transportation.

_Juan Cole teaches Middle Eastern and South Asian history at the
University of Michigan. His newest book, "Muhammad: Prophet of Peace
Amid the Clash of Empires" was published in 2020._

* Climate Change
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* wildfires
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* CO2
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* warming
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