The ‘end’ of Younger Dryas event

28 March 2014
Catastrophism

At http://joannenova.com.au/2014/02/greenland-ice-cores-show-natural-swings… … it seems a new ice core in Greenland has thrown up a few surprises – wild swings in temperature and weather. The authors discover wind direction and the frequency of storms in specific years of the YD period.

One to print out for later use. Its amazing how much information can be extracted from ice cores – very impressive. It's even more amazing the Earth came out of the Younger Dryas abruptly (within a single year). The abrupt onset of the Holocene inter-glacial is manifested in a marked reduction in storm event frequency and an increase in the length of the summer seasons. So, what was going on at the end of the Younger Dryas – and what exactly might have caused the Younger Dryas? Also, what causes shortened seasons – or upset seasons, apart from a wobble in the axis of rotation? The Younger Dryas is developing into a really intriguing period – but the big problem for catastrophists is that there were lots of similar events, in the Pleistocene and even in the Holocene (although on a reduced scale as far as the latter is concerned). We've had all sorts of theories from ocean circulation changes to variations in the output of the Sun. As far as the latter are concerned – can you switch the Sun on and off (as far as degrees of heat are concerned) as quickly as the ice core evidence suggests? Could the Earth passing through a region of the sky thick with dusty particles account for the Younger Dryas  – and could the Earth come out of it as quickly as the ice core evidence seems to suggest? Fred Hoyle famously said a comet could cause a lot of  dust in the atmosphere and an ocean impact could just as easily wash all that dust out of the atmosphere – but is this feasible? The Younger Dryas appears to have a possible catastrophic origin and demise but at the same time one is left wondering if some other factors were at work.

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