@article{PAR00000629, title = {{O}n the origin of the 100-kyr cycles in the astronomical forcing - art. no. {PA}4019}, author = {{B}erger, {A}. and {M}{\'e}lice, {J}ean-{L}uc and {L}outre, {M}.{F}.}, editor = {}, language = {{ENG}}, abstract = {[1] {I}nvestigations during the last 25 years have demonstrated that the astronomically related 19-, 23-, and 41-kyr quasiperiodicities actually occur in long records of the {Q}uaternary climate. {H}owever, the same investigations also identified the largest climatic cycle as being about 100 kyr long. {A}s the 100-kyr variations in standing insolation due to eccentricity change are too small, they cannot be the direct cause of the ice ages. {T}his is the reason why most of the modeling studies attempting to explain the relation between the astronomical forcing and climatic change have focused on this 100-kyr cycle. {I}n this paper, we will show the astronomical origin of the periods at about 100 kyr that characterize the long-term variations of eccentricity, of its first derivative, of the frequency modulation of obliquity, and of the inclination of the {E}arth's orbit on the invariable plane of reference. {F}ive independent values are found between 95 and 107 kyr, and a wavelet signature is suggested to test the possible relationships between the astronomical and climatic variables. {P}roxy records from deep-sea cores and {E}uropean {P}rogramme for {I}ce {C}oring in {A}ntarctica ice core and modeling results from the {L}ouvain-la-{N}euve two-dimensional model are used for illustration.}, keywords = {}, booktitle = {}, journal = {{P}aleoceanography}, volume = {20}, numero = {4}, pages = {{NIL}_19--{NIL}_47}, ISSN = {0883-8305}, year = {2005}, DOI = {10.1029/2005{PA}001173}, URL = {https://www.documentation.ird.fr/hor/{PAR}00000629}, }