title: review
abstract: In this paper, the authors consider the Sea of Azov (SA) as an estuary and investigate a flow exchange between SA and the adjacent Black Sea (BS) by means of remote sensing.As a proxy for the buoyant outflow from SA into BS they use Cl-a, although on page 5 (lines 22-25) they state that SST, Cl-a and TSM "are prone to significant variability and/or do not act as passive tracers, which hinders their direct application for accurate identification" of buoyant outflow from SA.As a proxy for the BS w