2 ms·

That's a good point. Is there record of such sudden change before?

AuthorizedCust 8y ago
Don't mean to be that guy, but he who makes the argument gets to provide the facts.
namirez 8y ago
No! The natural warmings happened over thousands of years. In comparison to the Paleocene–Eocene warming, we are dumping 50 times more CO2 into atmosphere. https://en.wikipedia.org/wiki/Paleocene%E2%80%93Eocene_Thermal_Maximum https://en.wikipedia.org/wiki/Paleocene%E2%80%93Eocene_Therm...
contravariant 8y ago
I'm not sure we have records that are precise enough to tell at that scale.
- rhcom2 8y ago
  Scientists use ice cores to recreate temperatures
  - eloff 8y ago
    And we don't have ice cores going back that far.
    - rhcom2 8y ago
      "The oldest continuous ice core records to date extend 123,000 years in Greenland and 800,000 years in Antarctica." https://www.bas.ac.uk/data/our-data/publication/ice-cores-and-climate-change/ https://www.bas.ac.uk/data/our-data/publication/ice-cores-an... It's not a scale of millions of years but that's pretty good.
      - eloff 8y ago
        It is good, but that's relative. A million years is so recent in geological history. It's like a quarter of 1% of the story.
        DuskStar 8y ago
        Wouldn't it be a quarter of a tenth of 1%?
        eloff 8y ago
        Indeed it is!
yters 8y ago
I thought there was a comet that hit the earth causing catastrophic climate change within days or weeks, and wiped out all the dinosaurs.
maxxxxx 8y ago
A big asteroid impact may do the job. Or a supervolcano.
TangoTrotFox 8y ago
It's difficult to get the precision needed to answer this question, but we have certainly had numerous extremely rapid heating events it the past. These [1] are the ice core data for the past 450k years and there were at least two major heating/cooling events that dwarf even where we're at today both hitting upwards of 10 degrees net change (from coldest to hottest) over extremely short periods of time. Interspersed in between are countless little peaks and valleys of temperatures as well, all over extremely significant temperature differences. [1] - https://upload.wikimedia.org/wikipedia/commons/f/f8/Ice_Age_Temperature.png https://upload.wikimedia.org/wikipedia/commons/f/f8/Ice_Age_...

Don't mean to be that guy, but he who makes the argument gets to provide the facts.

No! The natural warmings happened over thousands of years. In comparison to the Paleocene–Eocene warming, we are dumping 50 times more CO2 into atmosphere. https://en.wikipedia.org/wiki/Paleocene%E2%80%93Eocene_Thermal_Maximum https://en.wikipedia.org/wiki/Paleocene%E2%80%93Eocene_Therm...

contravariant 8y ago

I'm not sure we have records that are precise enough to tell at that scale.

rhcom2 8y ago
Scientists use ice cores to recreate temperatures
- eloff 8y ago
  And we don't have ice cores going back that far.
  - rhcom2 8y ago
    "The oldest continuous ice core records to date extend 123,000 years in Greenland and 800,000 years in Antarctica." https://www.bas.ac.uk/data/our-data/publication/ice-cores-and-climate-change/ https://www.bas.ac.uk/data/our-data/publication/ice-cores-an... It's not a scale of millions of years but that's pretty good.
    - eloff 8y ago
      It is good, but that's relative. A million years is so recent in geological history. It's like a quarter of 1% of the story.
      - DuskStar 8y ago
        Wouldn't it be a quarter of a tenth of 1%?
        eloff 8y ago
        Indeed it is!

yters 8y ago

I thought there was a comet that hit the earth causing catastrophic climate change within days or weeks, and wiped out all the dinosaurs.

maxxxxx 8y ago

A big asteroid impact may do the job. Or a supervolcano.

TangoTrotFox 8y ago

It's difficult to get the precision needed to answer this question, but we have certainly had numerous extremely rapid heating events it the past. These [1] are the ice core data for the past 450k years and there were at least two major heating/cooling events that dwarf even where we're at today both hitting upwards of 10 degrees net change (from coldest to hottest) over extremely short periods of time. Interspersed in between are countless little peaks and valleys of temperatures as well, all over extremely significant temperature differences. [1] - https://upload.wikimedia.org/wikipedia/commons/f/f8/Ice_Age_Temperature.png https://upload.wikimedia.org/wikipedia/commons/f/f8/Ice_Age_...