Diverse glacial ventilation in deep Pacific: An integrated record from Mariana Trench and Magellan Seamounts over the last 1.2 Myr [Global and Planetary Change, volume 230, November 2023, 104279]: Comment

Yi (2023) proposed a new deep Western Pacific ventilation hypothesis using beryllium ( 10 Be/ 9 Be) and 230 Th ex dates, magnetostratigraphy, and element-based tuning data from two box cores and one gravity core. However, given the low sedimentation rates of these cores and uncertain stratigraphy, we suggest that some interpretations require further clarifications and corrections. The low sedimentation rates cast doubt on the validity of the millennial-scale western Pacific bottom-water oxygenation variability. The lack of unsupported explanations about the newly found periodicity in the Mariana Trench and Magellan Seamounts records raises concern about the confidence of the age models. The phasing between the North Atlantic deep water and Antarctic bottom water formation and atmospheric p CO 2 in the deep Western Pacific setting is unclear. • The Comment highlights to clarify and correct some of Yi's (2023) interpretations. • The low sedimentation rates cast doubt on the millennial-scale western Pacific bottom-water oxygenation variability. • The lack of supported explanations about the newly found periodicity raises concern about the confidence of the age models. • The phasing between the NADW and AABW formation and atmospheric p CO 2 in the deep Western Pacific setting is unclear.