“…We extend this bSi clay estimate to the subtropical delta and coastal regions of the Changjiang Estuary and Yellow Sea. If the Changjiang‐Zhejian Fugian mudbelt dispersal system, with its regions of mobile muds, behaves similarly to the Amazon‐Guianas system or the Mississippi Delta, then an additional 0.05 Tmol/yr Si, 50% of the ~0.1 Tmol Si/yr supplied by the river, may be buried there (Zhang et al, ; Liu et al, ; Ran et al, ; Yao et al, ). Recent studies of early diagenesis of biogenic silica, Fe, S, K, and Mg, in the East China Sea inner shelf and Changjiang Estuary indicate prevalent neoformation of Fe‐rich clays and diagenetic alteration of biogenic silica, consistent with an increased estimate of storage (Zhu et al, , ; Wang et al, ; Zhao et al, ).…”