Acid-volatile sulfide (AVS) - A comment

The review by Rickard and Morse (this volume) adequately summarizes our current understanding with respect to acid-volatile sulfides (AVS). At the same time, this review addresses some of the misunderstandings with regard to measurements and dynamics of this important sedimentary sulfur pool. In this invited commentary, we identify some aspects that deserve more attention in our point of view, in particular with regard to the modeling of iron-sulfur interactions in sediments.