Nur mal ganz nebenbei bemerkt:
Die letzte Woche (13.-19.4.2025) war die erste Woche, in der die durchschnittliche CO₂-Konzentration mit 430,03 ppm auf dem Mauna Loa über 430 ppm lag.
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Just a side note:
Last week (April 13-19, 2025) was the first week in which the average CO₂ concentration on Mauna Loa was above 430 ppm, at 430.03 ppm.
Happy birthday to #geochemist Charles David Keeling (1928 - 2005) whose decades long observations of CO2 in air samples from Mauna Loa Observatory were some of the 1st direct data to show the human contribution to greenhouse effect & global warming. The ‘Keeling Curve’ (in copper & red) shows both the seasonal variations (the wiggles) & the strong upward trend with time as the greenhouse gas built up in the atmosphere. 
@falk
Instead of using a quadratic function, the data can be approximated just as well using an exponential function. The difference is marginal. However, in recent years, the exponential function has been more accurate in matching the real values.
For extrapolating the curve into the future, the difference is enormous. We are reaching higher CO2 concentrations much more quickly.
The rate at which atmospheric CO2 is increasing is now outpacing the pathways set out by the Intergovernmental Panel on Climate Change (IPCC) that limit global warming to 1.5C.
The third working group report of the #IPCC’s sixth assessment report (#AR6), published in 2022, presented a set of seven “illustrative pathways” that highlight how different mitigation choices across major economic sectors translate into future #GreenhouseGas #emissions and global temperatures.
In the three most-ambitious pathways, #GlobalWarming has a 50% chance of either staying below 1.5C, or overshooting it by only 0.1C (for up to several decades) before then returning to below 1.5C.
Yet, not only are atmospheric #CO2 concentrations still rising, the rate of rise is #accelerating.
The build-up of CO2 in the #atmosphere has been monitored at the #MaunaLoa observatory in #Hawaii since 1958.
As illustrated by the iconic #KeelingCurve below, the increase has been accelerating over the decades (blue line) due to ongoing emissions of CO2 from burning #FossilFuels and changing land use.
So while the curve needs to rapidly bend in the other direction to hold warming to 1.5C (light red line), the rate of rising CO2 marches onwards and upwards.
https://www.carbonbrief.org/met-office-atmospheric-co2-rise-now-exceeding-ipcc-1-5c-pathways/
Even though the coup actors have shut down some NOAA websites, including Keeling Curve data which measures global CO2 levels (now at 427ppm)
NOAA: "Carbon dioxide is accumulating in the atmosphere faster than ever — accelerating on a steep rise to levels far above any experienced during human existence, scientists from NOAA and the Scripps Institution of Oceanography offsite link at the University of California San Diego announced..."
"...“Over the past year, we’ve experienced the hottest year on record, the hottest ocean temperatures on record and a seemingly endless string of heat waves, droughts, floods, wildfires and storms,..."
https://www.noaa.gov/news-release/during-year-of-extremes-carbon-dioxide-levels-surge-faster-than-ever #keelingcurve #co2 #climateemergency #disasters
"The global average concentration of carbon dioxide in March this year was 4.7 parts per million (or ppm) higher than it it was in March last year, which is a record-breaking increase in CO2 levels over a 12-month period."
https://www.theguardian.com/environment/article/2024/may/09/carbon-dioxide-atmosphere-record?CMP=share_btn_url
#KeelingCurve
Unfriendly Reminder: Neuer Negativrekord von 427,8 ppm beim CO2 Gehalt in der Atmosphäre. Sowas hat Homo Sapiens noch nie erlebt. Quelle: keelingcurveps://keelingcurve.ucsd.edu #keelingcurve
„With the discovery of these Air Pollution Foundation documents, it is now possible to date the earliest sponsorship of climate science by the fossil fuel industry to 1954, approximately a quarter of a century before Exxon’s internal research program of the late 1970s,” DeSmog said. “These new documents provide important evidence that the fossil fuel industry has been intricately connected to climate science from its earliest beginnings — not only as a driver of the greenhouse effect behind climate change, but also as a contributor to the scientific discoveries that would transform our understanding of humanity’s relationship with the Earth and its atmosphere.” #keelingcurve #keeling #exxonknew
https://www.ecowatch.com/fossil-fuel-industry-climate-impacts-knowledge.html
Based on daily values, the September average of atmospheric CO2 at Mauna Loa was ~418.4 ppm; that's ~2.5 ppm higher than last year!
#globalwarming #ClimateChange #co2 #maunaloa #keelingcurve
A report in Nature concluded that we have already exceeded seven of eight “#safe and #just #Earth #systemboundaries” that it studied—from #groundwater supplies and #fertilizer #overuse to #temperature
“We are moving in the wrong direction on basically all of these,” Johan Rockström, the paper’s lead author and the director of the Potsdam Institute for Climate Impact Research, told reporters.
https://www.newyorker.com/news/daily-comment/to-save-the-planet-should-we-really-be-moving-slower
#KeepItInTheGround #KeelingCurve
#Sufficiency #Sharing #ParisAligned
Happy birthday to #geochemist Charles David Keeling (1928 - 2005) whose decades long observations of CO2 in air samples from Mauna Loa Observatory were some of the 1st direct data to show the human contribution to greenhouse effect & global warming. The 'Keeling Curve' (in copper & red) shows both the seasonal variations (the wiggles) & the strong upward trend with time as the greenhouse gas built up in the atmosphere.
Ich lass das mal hier. Immer wieder hilfreich für Diskussionen.
Stichwörter wie #suesseffekt #keelingcurve #isotope #klimakatastrophe
"Warum der Klimawandel menschengemacht ist"
The eruption of #MaunaLoa interrupted the #KeelingCurve, the longest atmospheric #CO₂ time series in the world and the most iconic measurement in the environmental sciences.
Now, my workplace — University of Hawaiʻi at Mānoa — has helped set up a temporary CO₂ measurement on the nearby #MaunaKea to ensure that sampling of remote atmospheric CO₂ in the tropics could continue.
Because of the #MaunaLoa eruption and lava flows, the #CO2 measurement equipment that maintains the famous #Keeling Curve lost power on Nov. 28 and is not currently recording data.
Citing their post: "The Keeling Curve is considered the icon of scientific evidence that human activities are altering the planet’s #climate. It has provided incontrovertible evidence that the amount of [atmospheric] gas carbon dioxide has risen far above any levels experienced on Earth for at least three million years […] Researchers at #Scripps Institution of Oceanography, which established the Keeling Curve record at the site in 1958, are exploring options regarding the relocation of measurement equipment."
