Correction to “Possible crippling of the core dynamo of Mars by Borealis impact”

摘要

In the paper “Possible crippling of the core dynamo of Mars by Borealis impact” by Jafar Arkani‐Hamed (Journal of Geophysical Research, 115, E12021, doi:10.1029/ 2010JE003602, 2010) the impact heating of Mars by the Borealis impact, which likely created the northern lowland basin, was calculated. Using the crater scaling laws [Holsapple, 1993; Melosh, 1989] the basin diameter was related to the size of the impactor. Following the impact, a nearly uniformshock pressurewas generated inside an isobaric region in the mantle, outside which the shock pressure decreased exponentially with distance from the isobaric center following the average model of Pierazzo et al. [1997]. After crossing the core‐mantle boundary, the shock wave travelled in the core where the shock pressure again decayed with distance travelled from the isobaric center according to Pierazzo et al.’s average model but with the physical parameters of the core. The corresponding impact temperature increase is obtained using the Foundering model of Watters et al. [2009].