This graphic shows the globally averaged temperature of every day since 1958
Because most of the earth's land mass is in the northern hemisphere, you can see the widening of the (northern) summer season, both starting earlier and ending later in the year
You can see the insane heat this past summer.
I think of this graph when I see how green the trees are where I live, in mid October.
So September was bananas. But this piece points at something different, and much more disturbing: the acceleration of #GlobalWarming.
"Amazingly enough, this acceleration quite closely matches what climate models have projected for this period. In other words, scientists have long foreseen a possible acceleration of warming if our aerosol emissions declined while our greenhouse gas emissions did not. That’s what we’re now seeing."
Here's more cleanup of aerosol emissions and dimming, basically a no-idling rule for ships in berth.
"The new rules broaden 2007 guidelines that required a percentage of certain types of vessels visiting the state’s biggest ports (including Los Angeles and Long Beach) to plug into on-shore power sources when docked, rather than burning fuels that emit diesel particulates and nitrogen oxides; the former is linked to lung cancer and the latter contributes to smog "
"The #CarbonBudget is the maximum amount of carbon #emissions that can be released while restricting global temperature rise to the limits of the Paris agreement. The new figure is half the size of the budget estimated in 2020 and would be exhausted in six years at current levels of emissions."
"The study, published in the journal Nature Climate Change, used updated data and improved climate modelling compared with other recent estimates. It also used the latest figures showing that #AerosolPollution was better at blocking sunlight and limiting heating than previously thought. As a result, lower pollution in future would mean more global heating and therefore a smaller carbon emissions budget to remain under 1.5C."
@CelloMomOnCars This would be related to the recent ban on high sulphur bunker oil as fuel for cargo ships and cruise liners, right?
Why we are having such a shitty fucking year.
As bad as it is, it might still be an improvement on global warming + global dimming. In that it would have gotten hotter albiet less so but at the same time fucked over crop yield due to lower solar insolation.
Yes it is.
But cleaning shipping fuel is only the latest step in a long path of cleaning up particulate matter and aerosol pollution, e.g. with the Clean Air Act in the United States.
Countries have been cleaning up the sulphur out of diesel for cars and trucks. Great for lungs, but the global dimming is diminishing.
Crops are threatened by climate change in multiple ways: think floods and droughts, etc.
Six years worth of current carbon emissions (250 gigatonnes of CO₂) for a 50/50 likelihood of limiting warming to 1.5°C.
"A more risk-averse assessment would report a two-in-three chance of staying under 1.5°C with a remaining budget of 60 gigatonnes - or one-and-a-half years of current #emissions."
"#Aerosols act like a “shade” to incoming sunlight, reflecting it back into space.
“We’ve been reducing [aerosol] emissions, which is good for #AirQuality, but it means now the #CarbonDioxide signal can punch through,” Professor Collins said."
Side note: Those aerosols are a form of #GeoEngineering. And #AirPollution causes the premature deaths of six million people worldwide every year. Is that kind of geo-engineering worth it?
@CelloMomOnCars Incredible that “Storms of my Grandchildren” seems like an old book to me now. That was where I first learned of this effect which Dr. Hansen referred to as our “Faustian Bargain”. But, here we are.
"#AirPollution, a global scourge that kills millions of people a year, is shielding us from the full force of the sun. Getting rid of it will accelerate #ClimateChange.
One proposal called "#SolarRadiationManagement" envisions deliberately injecting sulphur #aerosols into the atmosphere to cool temperatures. But many scientists worry that the approach could unleash unintended consequences.
A more mainstream plan is to curb #methane emissions. "
@CelloMomOnCars
It's not like "Global Cooling" has snuck up on us, a 2012 article from Michael Mann in Scientific American that I read a decade ago estimated about 0.5c of cooling was occuring from our pollution and eventually that would catch up with us.
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