Relationships of chromophoric dissolved organic matter (CDOM) absorption coefficient at 412 nm (aCDOM(412)) with dissolved organic carbon (DOC) for (a) fall-winter-spring (FWS) in the Middle Atlantic Bight (MAB) and Gulf of Maine (GoMa); (b) summer MAB and GoMa; (c) combined FWS and summer in MAB and GoMa; (d) merged MAB data with evaluation data from CV1 and CV2 cruises; (e) FWS Chesapeake Bay lower estuary, mouth, and plume; and (f) summer Chesapeake Bay lower estuary, mouth, and plume. SMAB = Southern MAB, HRE = Hudson River Estuary, NYB = New York Bight, CMAB = Chesapeake MAB, which represents the Chesapeake Bay lower estuary, mouth, plume, and adjacent shelf waters; Del Bay and Plume = lower Delaware Bay estuary, mouth, and plume.