gerard roe's paper this wiki text is obsolete i just added this section because someone badly needs to update this completely obsolete article because of the well cited article below pretty much all the criticisms in this wikipedia article are out of touch the readers will be grateful to anyone who will update it but the amount of required work is nontrivial many of the doubts about the theory disappeared in when gerard roe published a paper in defense of milankovitch in geophysical research letters vol l doi gl he correctly identified the insolation with the time derivative of the measured ice volume rather than the ice volume itself and obtained a spectacular agreement that has solved the year problem and other problems below by taking the derivative the short duration higher frequency cycles are amplified until this text takes roe's paper into account you should realize that it is obsolete