4 ms·

Did you read even one of the articles I linked? But the BBC article... "the research has not yet been peer-reviewed. "They used 21 climate models to estimate.

Did you read even one of the articles I linked? But the BBC article... "the research has not yet been peer-reviewed. "They used 21 climate models to estimate..." "They compared the climate as it is today, with the world as it would be without human-induced warming." This is not empirical science. And by using a 1000 year model they are starting their analysis, conveniently, after the peak of the Roman Warm Period.

SketchySeaBeast 5y ago
> And by using a 1000 year model they are starting their analysis, conveniently, after the peak of the Roman Warm Period. They don't seem to be using a 1000 year model, they are just saying the rate of occurrence. And when do you think the Romans, and their related warming period, were exactly?
- irthomasthomas 5y ago
  https://www.newscientist.com/article/dn22040-tree-rings-suggest-roman-world-was-warmer-than-thought/ https://www.newscientist.com/article/dn22040-tree-rings-sugg... "How did the Romans manage to grow grapes in northern England when most climate studies suggest the weather was much cooler then? We may now have an answer: it wasn’t that cold at all." Edit: oops I did mixup the late Roman and Medieval warm periods. Anyway both the RWP around 2000 years ago and the MWP 1000 years ago are what geologists call interglacial periods. The earth is currently in an ice age (when there is permanent ice at either of the poles) but every thousand years or so the climate warms and the ice retreats for a couple hundred years. Unfortunately most climate change studies only consider data from 1850 onwards, and those that do go back further only go start at the last glacial period about a thousand years ago.
  - SketchySeaBeast 5y ago
    I wasn't asking regarding the existence of the period. The Roman Warming period was ~250 BC to ~400 AD - much closer to 2,000 years ago than 1,000. It wasn't anywhere relevant. You're also ignoring that the medieval warming period WAS exactly 1,000 years ago and we're currently beating those temperatures. Edit to match your edit: Neither the MWP nor the RWP were global phenomenas - they were hotspots at different times for different regions. What we are currently experiencing is a GLOBAL increase.
    - irthomasthomas 5y ago
      You are claiming that the last two warm periods where not global? So you deny the existence of the Minoan, Roman, and the Medieval interglacials? I think geologists would disagree.
      - SketchySeaBeast 5y ago
        https://news.climate.columbia.edu/2019/07/24/climate-epochs-that-werent/ https://news.climate.columbia.edu/2019/07/24/climate-epochs-...
        irthomasthomas 5y ago
        So you are denying the glacial/interglacial cycle that is taught in geology. I guess that makes you a science denier ;) https://en.wikipedia.org/wiki/Interglacial https://en.wikipedia.org/wiki/Interglacial Also worth noting this from your article... "During the following Little Ice Age, which lasted roughly from 1300 to 1850" There's that 1850 again, the climactic minimum, and coincidentally the exact year that climate change models start from. "1550 to 1850 AD Little Ice Age Coldest temperatures since the beginning of the Holocene. Populations die from crop failure and famine in Europe." http://www.atmo.arizona.edu/students/courselinks/fall12/atmo336/lectures/sec5/holocene.html http://www.atmo.arizona.edu/students/courselinks/fall12/atmo...

SketchySeaBeast 5y ago

> And by using a 1000 year model they are starting their analysis, conveniently, after the peak of the Roman Warm Period. They don't seem to be using a 1000 year model, they are just saying the rate of occurrence. And when do you think the Romans, and their related warming period, were exactly?

irthomasthomas 5y ago
https://www.newscientist.com/article/dn22040-tree-rings-suggest-roman-world-was-warmer-than-thought/ https://www.newscientist.com/article/dn22040-tree-rings-sugg... "How did the Romans manage to grow grapes in northern England when most climate studies suggest the weather was much cooler then? We may now have an answer: it wasn’t that cold at all." Edit: oops I did mixup the late Roman and Medieval warm periods. Anyway both the RWP around 2000 years ago and the MWP 1000 years ago are what geologists call interglacial periods. The earth is currently in an ice age (when there is permanent ice at either of the poles) but every thousand years or so the climate warms and the ice retreats for a couple hundred years. Unfortunately most climate change studies only consider data from 1850 onwards, and those that do go back further only go start at the last glacial period about a thousand years ago.
- SketchySeaBeast 5y ago
  I wasn't asking regarding the existence of the period. The Roman Warming period was ~250 BC to ~400 AD - much closer to 2,000 years ago than 1,000. It wasn't anywhere relevant. You're also ignoring that the medieval warming period WAS exactly 1,000 years ago and we're currently beating those temperatures. Edit to match your edit: Neither the MWP nor the RWP were global phenomenas - they were hotspots at different times for different regions. What we are currently experiencing is a GLOBAL increase.
  - irthomasthomas 5y ago
    You are claiming that the last two warm periods where not global? So you deny the existence of the Minoan, Roman, and the Medieval interglacials? I think geologists would disagree.
    - SketchySeaBeast 5y ago
      https://news.climate.columbia.edu/2019/07/24/climate-epochs-that-werent/ https://news.climate.columbia.edu/2019/07/24/climate-epochs-...
      - irthomasthomas 5y ago
        So you are denying the glacial/interglacial cycle that is taught in geology. I guess that makes you a science denier ;) https://en.wikipedia.org/wiki/Interglacial https://en.wikipedia.org/wiki/Interglacial Also worth noting this from your article... "During the following Little Ice Age, which lasted roughly from 1300 to 1850" There's that 1850 again, the climactic minimum, and coincidentally the exact year that climate change models start from. "1550 to 1850 AD Little Ice Age Coldest temperatures since the beginning of the Holocene. Populations die from crop failure and famine in Europe." http://www.atmo.arizona.edu/students/courselinks/fall12/atmo336/lectures/sec5/holocene.html http://www.atmo.arizona.edu/students/courselinks/fall12/atmo...