Several individuals have been claiming that prior to recent “revisionist history” (a.k.a. advancing science by examining data), “everyone” accepted that the Medieval Warm Period (MWP) was warmer than today.
What is this claim based on? It’s true in the first version of the IPCC report (1990) a crude temperature graph was presented which showed the MWP as warmer than today. It was roughly based on Lamb’s Central England Temperature (CET) data, compiled over 4 decades ago.
http://www.realclimate.org/index.php/archives/27…
Last time I checked, the world is a little bigger than central England, and the IPCC report did not otherwise claim the MWP was warmer than today globally. But even if you want to use CET data, if you extend it to Present, it’s hotter than during the MWP anyway.
Is there any evidence to support the claim that prior to the late 1990s, it was universally accepted that the MWP was warmer than today? Or is this claim the real revisionist history?
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cuz they’re dumb
the very undeniable fact that this ‘warming era’ wasn’t ‘international huge’ illustrates the very undeniable fact that close by events and anomalies are not what we are speaking approximately. we are speaking a pair of large scientific test utilising the full earth as a laboratory. The hypothesis states that incoming photograph voltaic radiation must be balanced via an equivalent quantity of outgoing infrared radiation to maintain an appropriate planetary temperature and that extreme human generated greenhouse gases interfer with this warmth replace. The counter hypothesis states that no quantity of human action can effect the earth’s climate. The ‘test’ includes putting increasing quantities of CO2, methane and water vapor into the ambience via burning fossil fuels. warmth physics point out that those ‘greenhouse gases’ have a tendency to stay away from infrared radiation from exiting the planet’s floor into outer area. The test over the final 2 centuries practice an prompt affiliation between turning out to be guy made CO2 production and a small quantity of warming. It additionally exhibits that lots of the CO2 has been absorbed via the international’s oceans reducing the finished quantity of released CO2 interior the ambience. despite the fact that there are superb warning indicators that the oceans have absorbed close to to their optimum inflicting the quantity of atmospheric CO2 to today enhance…the ‘hockey stick’ representation. the present CO2 load stands at 386ppm and 4ppm is the place familiar warmth physics shows that speedy heating will take place. If the oceans practice to be waiting to soak up countless CO2 and we bypass the 4ppm threshold and no significant heating is stated, the 1st hypothisis will practice to be incorrect and the 2d would be triumphant. Who desires to guess?