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Post by sigurdur on Mar 1, 2017 18:10:41 GMT
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Post by Ratty on Mar 1, 2017 21:06:02 GMT
Abstract: The pacing of glacial–interglacial cycles during the Quaternary period (the past 2.6 million years) is attributed to astronomically driven changes in high-latitude insolation. However, it has not been clear how astronomical forcing translates into the observed sequence of interglacials. Here we show that before one million years ago interglacials occurred when the energy related to summer insolation exceeded a simple threshold, about every 41,000 years. Over the past one million years, fewer of these insolation peaks resulted in deglaciation (that is, more insolation peaks were ‘skipped’), implying that the energy threshold for deglaciation had risen, which led to longer glacials. However, as a glacial lengthens, the energy needed for deglaciation decreases. A statistical model that combines these observations correctly predicts every complete deglaciation of the past million years and shows that the sequence of interglacials that has occurred is one of a small set of possibilities. The model accounts for the dominance of obliquity-paced glacial–interglacial cycles early in the Quaternary and for the change in their frequency about one million years ago. We propose that the appearance of larger ice sheets over the past million years was a consequence of an increase in the deglaciation threshold and in the number of skipped insolation peaks. ''Figure 1: Occurrence of interglacials over the past 800,000 years. a, LR04 benthic δ18O stack20. b, Daily mean insolation on 21 June at 65° N (ref. 50). Marine Isotope sub-Stages (MIS), corresponding to benthic δ18O minima, are indicated. Black arrows denote interglacials[19].
(Sixteen graphs in total)Discussion at WUWT: wattsupwiththat.com/2017/02/28/the-timing-of-interglacials/
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Post by missouriboy on Mar 2, 2017 10:06:55 GMT
Your problem, Missouri, is that you know things and - if you don't - you make it your business to find out! Nye is a parrot who has learned things and repeats them. He cannot argue his point without resorting to the AGW clichés .... and that's no argument at all. Slightly unrelated: Is Trump going to be swayed by alarmists and luke-warmers or will he become a "light on the hill" for the sceptics?? www.nationalreview.com/article/445121/donald-trump-paris-climate-agreement-teachable-moment-europe
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Post by Ratty on Mar 2, 2017 12:03:54 GMT
Your problem, Missouri, is that you know things and - if you don't - you make it your business to find out! Nye is a parrot who has learned things and repeats them. He cannot argue his point without resorting to the AGW clichés .... and that's no argument at all. Slightly unrelated: Is Trump going to be swayed by alarmists and luke-warmers or will he become a "light on the hill" for the sceptics?? www.nationalreview.com/article/445121/donald-trump-paris-climate-agreement-teachable-moment-europe Trump has been left a forest land mines by Obama (eg, the Australian refugee deal). He's going to need to negotiate thru a lot of ambushes, both locally and internationally. From what I've seen, I think he's up to it. Shame Randolph Scott has passed: He always thwarted the ambushers.
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Post by sigurdur on Mar 3, 2017 0:26:12 GMT
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Post by Ratty on Mar 3, 2017 7:09:23 GMT
Give us this day, our daily .... seeds ?? leaves?? (provided you don't use water or fertilizer). With meat and rice already on the banned list, I've decided to apply for a research grant to investigate the nutritional value of cockroaches (with respect to climate change, of course). I was a bit slow off the mark and someone else has already done crickets.
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Post by douglavers on Mar 3, 2017 8:07:39 GMT
[[[ Tzedakis, et al. explain including the time since the previous interglacial in terms of ice stability. That is, the longer the ice has existed and the thicker it is the more unstable it is.]]]
I did not understand the comment about the "longer, the thicker, the more unstable".
Are they suggesting a glacial phase change?!
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Post by Ratty on Mar 3, 2017 9:33:42 GMT
[[[ Tzedakis, et al. explain including the time since the previous interglacial in terms of ice stability. That is, the longer the ice has existed and the thicker it is the more unstable it is.]]] I did not understand the comment about the "longer, the thicker, the more unstable". Are they suggesting a glacial phase change?! Yes. GPC has long been disputed by psychologists. Hang on. What thread is this? Signed Sir Ratty, A.A.A.A. ** ** Associate of the Association for the Abolition of Acronyms. Sorry Doug.
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Post by nautonnier on Mar 3, 2017 10:53:14 GMT
Give us this day, our daily .... seeds ?? leaves?? (provided you don't use water or fertilizer). With meat and rice already on the banned list, I've decided to apply for a research grant to investigate the nutritional value of cockroaches (with respect to climate change, of course). I was a bit slow off the mark and someone else has already done crickets. Give us this day, our daily .... seeds ?? leaves?? (provided you don't use water or fertilizer or CO2). Oh dear now all the plants are dead..... Give us this day our daily cyanobacteria?
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Post by Ratty on Mar 3, 2017 12:37:41 GMT
Blue is not my favourite food colour.
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Post by missouriboy on Mar 4, 2017 19:25:46 GMT
This from the comments on this piece. Someone raised Marie Antoinette's famous quote on 'Let them eat cake'. I always thought this was a strange comment, but the responder put it into its period meaning. So Marie really was a B____! The ‘cake’ of of the apocryphal quote is the creosote and soot of chimney fires.
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Post by nautonnier on Mar 5, 2017 12:05:55 GMT
This video may not appear to have an immediate link to climate 'science' ...... What this video shows is if you forget about sampling rates in a time series you can find all sorts of unreal effects. See also Hurst Exponent (See Ratty told you maths was interesting )
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Post by sigurdur on Mar 8, 2017 4:33:07 GMT
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Post by sigurdur on Mar 8, 2017 4:33:50 GMT
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Post by Ratty on Mar 8, 2017 7:22:31 GMT
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