Dr Roger Higgs: Global warming and cooling for last 2,000 years mimic Sun’s magnetic activity, not CO2
April 9, 2021 Cap Allon
Below is a 500-word abstract for Geological Society (London) virtual conference ‘Climate Change in the Geological Record’, 26-27th May 2021 — written by Dr Roger Higgs, Geoclastica Ltd, UK (submitted April 8, 2021).
Most scientists urge shifting to nuclear and/or renewable energy, amply justified by air pollution, dwindling fossil fuels and, many believe, global warming by CO2.
For the last 2,000 years Earth’s average surface temperature (by proxies and post-1750 thermometers) closely matches solar-magnetic output (SMO) (ice-core proxies, sunspots, neutron detectors, magnetometers), after applying a ~100-year temperature lag. Both fell for 1,000 years from ~400AD into the Little Ice Age (LIA; ~1400-1900). Then SMO surged from ~1700AD (Maunder Minimum), the largest rise in 9,000 (sic) years, growing 130% in the 20th Century alone, reaching the strongest solar ‘grand maximum’ (1937-2004; peak 1991). (Contrast <0.5% parallel increase in total solar irradiance [TSI].) Temperature surged too, from the final LIA nadir ~1830 (Berkeley-HadCRUT data) to 2016, the largest warming (~1.3C) and highest peak in 2,000 years. The temperature and SMO graphs share two further characteristics, besides overall ‘hockey-stick’ shape: (A) multi-decadal up-down ‘sawteeth’, with superimposed 3-to-20-year sawteeth (longer than ENSO); and (B) surge amplitude about twice the 1,000-year decline. Three simple cross-matches confirm the ~100-year lag: (1) LIA’s three coldest peaks (~1470, 1610, 1830) mimic three SMO extreme minima (~1330, 1450, 1700); (2) the Sun’s 310AD peak (second-highest) aligns with a prominent ~450AD warm peak (with abundant geological-archaeological evidence for a ~3-metre sea-level rise in <100 years); (3) successive HadCRUT sawteeth cusps at 1910, 1945 and 1975 correspond to 1810, 1840 and 1890 (sunspot 30-year-smoothed chart).
https://electroverse.net/dr-roger-higgs-global-warming-and-cooling-for-last-2000-years-mimic-suns-magnetic-activity-not-co2/
