It looks like we may NEED global warming just to get back to average.
Food crops love warmer, longer growing seasons.
But the current science based prediction is that this little warm spell, peaking in mid 2013 may be the beginning of much cooler global temperatures and reduced food crops.
Tree-rings prove climate was WARMER in Roman and Medieval times than it is now - and world has been cooling for 2,000 years
- Study of semi-fossilised trees gives accurate climate reading back to 138BC
- World was warmer in Roman and Medieval times than it is now
German researchers used data from tree rings – a key indicator of past climate – to claim the world has been on a ‘long-term cooling trend’ for two millennia until the global warming of the twentieth century.
This cooling was punctuated by a couple of warm spells.
These are the Medieval Warm Period, which is well known, but also a period during the toga-wearing Roman times when temperatures were apparently 1 deg C warmer than now.
They say the very warm period during the years 21 to 50AD has been underestimated by climate scientists.
Lead author Professor Dr Jan Esper of Johannes Gutenberg University in Mainz said: ‘We found that previous estimates of historical temperatures during the Roman era and the Middle Ages were too low.
‘This figure we calculated may not seem particularly significant, however it is not negligible when compared to global warming, which up to now has been less than 1 deg C.’
LINK
Edited by Rogerdodger, 11 July 2012 - 08:18 PM.
