« Respuesta #193 en: Domingo 10 Marzo 2019 13:23:53 pm »
Solar input to high latitudes and the global ice volume(1) For the whole period from 2.7 mya to the present, precession has exerted a significant higher frequency influence on the SIHL via its ~ 22 ky periodic variability.
(2) Despite the higher frequency input of precession to the SIHL, we do not observe this frequency in the record of ice volume vs. time for the whole period from 2.7 mya to the present, except as smaller secondary perturbations to underlying, more slowly varying major trends in ice volume.
(3) From about 2.7 mya to about 1.0 mya, the fundamental cadence of ice volume variability was paced by a 41 kyr period.
(4) Over the past five ice ages over the past 450 kyrs, the fundamental cadence of ice volume variability was paced by spacings of either four or five precession periods.
(5) The period from 1.0 mya to about 0.6 mya was a transition period from the 41 kyr cadence to the longer cadence, but resembled the longer cadence more closely. 
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