Toddsterpatriot
Diamond Member
The greenhouse effect is real. So is rising CO2 levels.
So, obviously, the temperature rise cannot have paused.
AGW 101.
As we both know (since you've repeatedly argued the point), GHGs are not the ONLY source of increased radiative forcing. So, obviously, the temperature rise CAN pause and has done so on numerous occasions in the past. I once more direct your attention to the world's temerature between 1941 and 1979. Have you looked?
Many things affect the Earth's temperature. Do you actually wish to contend that means that anthropogenic GHGs could not be the source of the current warming?
It's possible that it's being caused by aliens from another galaxy, but it's not particularly likely, is it. The point - that I really shouldn't have this much difficulty making - is that the Earth's temperature is the end result of a number of factors and processes, many quite complex. Warming from GHGs is slight, but consistent. That warming overlays warming and cooling from a number of other factors. The current hiatus is due to historically high levels of reflective aerosols from high rates of vulcanism and from changes in the pseudo-periodicity of the El Nino Southern Oscillation (ENSO). And those ENSO changes may well be the result of primary and secondary warming effects: increased fresh meltwater being dumped at the poles for one.
How about answering my questions? You have yet to tell us what you believe is happening and why.
The terminal warming of the LIA ended in 1850. At that point the rate of warming increased almost six-fold. Can you tell us why?
Many of them didn't.
From Wikipedia's article on the LIA
o The population of Iceland fell by half...
o Iceland also suffered failures of cereal crops, and people moved away from a grain-based diet.
o The Norse colonies in Greenland starved and vanished, as crops failed and livestock could not be maintained through increasingly harsh winters
o In North America, American Indians formed leagues in response to food shortages.
o Hubert Lamb said that in many years, "snowfall was much heavier than recorded before or since, and the snow lay on the ground for many months longer than it does today."
o Crop practices throughout Europe had to be altered to adapt to the shortened, less reliable growing season, and there were many years of dearth and famine (such as the Great Famine of 13151317
o "Famines in France 169394, Norway 169596 and Sweden 169697 claimed roughly 10% of the population of each country.
o In Estonia and Finland in 169697, losses have been estimated at a fifth and a third of the national populations, respectively."
o Viticulture disappeared from some northern regions. Violent storms caused serious flooding and loss of life. Some of these resulted in permanent loss of large areas of land from the Danish, German and Dutch coasts.
Faster means that it is very unlikely to have the same cause as the MWP. Faster matches the rate of GHG radiative forcing CALCULATED FROM FIRST PRINCIPLES.
Does the Earth always warm or cool at the exact same rate?
Of course not, but firmly evidenced and peer-reviewed studies show that it has not warmed at the current rate at any point prior in the entire Holocene Epoch. Firm evidence (the Vostok ice cores and others) show that CO2 has not risen at the current rate in the previous 800,000 years. These points are not direct evidence that human GHGs are the cause of the warming, but they do make other causation theories difficult to maintain.
How fast did it warm when the ice in my backyard melted?
About a quarter of a Centigrade degree per century, tops.
Many of them didn't.
From Wikipedia's article on the LIA
o The population of Iceland fell by half...
o Iceland also suffered failures of cereal crops, and people moved away from a grain-based diet.
o The Norse colonies in Greenland starved and vanished, as crops failed and livestock could not be maintained through increasingly harsh winters
o In North America, American Indians formed leagues in response to food shortages.
o Hubert Lamb said that in many years, "snowfall was much heavier than recorded before or since, and the snow lay on the ground for many months longer than it does today."
o Crop practices throughout Europe had to be altered to adapt to the shortened, less reliable growing season, and there were many years of dearth and famine (such as the Great Famine of 13151317
o "Famines in France 169394, Norway 169596 and Sweden 169697 claimed roughly 10% of the population of each country.
o In Estonia and Finland in 169697, losses have been estimated at a fifth and a third of the national populations, respectively."
o Viticulture disappeared from some northern regions. Violent storms caused serious flooding and loss of life. Some of these resulted in permanent loss of large areas of land from the Danish, German and Dutch coasts.
Yes, colder is worse, warmer is better.
That's why they call warm periods Climactic Optimums.