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The point they make in their paper is that it wasnt just the volcanoes (which are pretty large in comparison to the 1815 Tambora eruption), but that solar activity was also weak, the cumulative effect being enough to tip the climate into a cooler phase over a prolonged period due to feedback mechanisms. As I understand the Little Ice Age in the 2nd millennium is blamed upon similar combinations of volcanoes and solar activity, but it suffers from a poorly defined start date.

This LALIA would seem to have a definitive trigger at 536/540. It may well have been that some global cooling could have occured anyway, but the one-two punch of 536/540 just exasperated it all. As you would have seen from private communication (Baillie and McAneney 2015 "Why we shouldn’t ignore the mid-24th century BC when discussing the 2200-2000 BC climate anomaly"), the 2200 BC event (AKA 4.2 kya event) seems to have a similar abrupt trigger, though ice cores are unfortunately poorly dated at this time (in my opinion) to link it to any volcanic eruption.

Jonny

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Subject Views Written By Posted
Late Antique Little Ice Age 760 JonnyMcA 09-Feb-16 10:05
Re: Late Antique Little Ice Age 278 Aine 09-Feb-16 13:02
Re: Late Antique Little Ice Age 243 carolb 09-Feb-16 13:20
Re: Late Antique Little Ice Age 324 JonnyMcA 09-Feb-16 13:49
Re: Late Antique Little Ice Age 313 Aine 09-Feb-16 14:42
Re: Late Antique Little Ice Age 329 JonnyMcA 09-Feb-16 15:07
Re: Late Antique Little Ice Age 398 Aine 09-Feb-16 16:35
Re: Late Antique Little Ice Age 327 JonnyMcA 09-Feb-16 19:11
Re: Late Antique Little Ice Age 292 Aine 09-Feb-16 19:23
Re: Late Antique Little Ice Age 221 drrayeye 13-Feb-16 01:09
Re: Late Antique Little Ice Age 182 Aine 13-Feb-16 15:06
Re: Late Antique Little Ice Age 184 carolb 13-Feb-16 19:46
Murky 261 drrayeye 13-Feb-16 21:05
Re: Murky 269 Aine 13-Feb-16 22:28
Re: Late Antique Little Ice Age 435 Me 15-Feb-16 15:40


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