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Wednesday, October 21, 2020

Margaritelli et al. (2020) -- How Common is a Temperature Rise of +2 degrees C. ?

Margaritelli, G., Cacho, I.,
Catala, A., Barra, M., Bellucci,
L.G., Lubritto, C., Rettori, R.
 and Lirer, F.


2020

Persistent warm Mediterranean
surface waters during
the Roman period.


Scientific Reports 10: 10431,
doi.org/10.1038/s41598-020-67281-2.



FULL  SUMMARY  HERE:

 http://www.co2science.org/articles/V23/oct/a5.php

MY  SHORT  SUMMARY  FOLLOWS:
The Roman Warm Period is a five-century period of warm temperatures that was "characterized by [human] prosperity and expansion," during which warming brought about conditions that "developed the greatest ancient civilization of all time, the Roman one."

The warm temperatures helped humans flourish -- the opposite of what climate alarmists falsely proclaim. The allegedly "unsafe" +2 degrees C. or more warming was reached during the Medieval Warm Period (~AD 1200-1400), the Roman Warm Period (~AD 0-550), and during an earlier warm period centered around 500 BC. No bad news followed, so any warming more than +2°C above pre-industrial values is  not "dangerous". Meaning efforts to prevent such warming by eliminating all use of fossil fuels must be based on ulterior motives.

Figure 1.
Sea surface temperature (SST) reconstruction from Sicily Channel (Mg/Ca G.ruber core SW104-ND11). The red dashed line represents the 95% CI smoothed curve (Monte Carlo simulation) and the thin red lines are the 2.5% and the 97.5% CI of 10000 LOESS fitted realizations of the data. The black dots over the Sicily Channel record (blue curve) represent analyzed data points and the light blue shadow is the propagation error. The grey bands show the main climate events documented in the Mediterranean basin. 



 


Figure 2.
Same as Figure 1, but with yellow shading and orange line color to highlight the dangerous warming zone where historical temperatures were more than 2°C warmer than pre-industrial times.