A comprehensive assessment of the mercury budget in the Marano–Grado Lagoon (Adriatic Sea) using a combined observational modeling approach

Mercury in the Black Sea: New Insights From Measurements and Numerical Modeling

“…The WASP7 Hg model/MERC7 submodel (Wool et al, 2001) is a dynamic process-based model designed to simulate the Hg cycle within a system of well-mixed discrete spatial units (layers) of water and sediment as well as the exchanges of the system with its boundaries. This model has been already adapted and successfully applied to a shallow environment in a 2D configuration (Canu & Rosati, 2017;Melaku Canu et al, 2015), and is here used in a 1D configuration to explore Hg dynamics along an extended redox gradient. Figure 3 shows the conceptual model of the processes that affect the evolution of the state variables (Table S2).…”

“…This paper aims to understand Hg speciation along a redox gradient by focusing on the pathways of MeHg production and transport. We integrated novel marine Hg and MeHg observations from the 2013 GEOTRACES MEDBlack cruise with a fate and transport 1-D model for Hg species (Melaku Canu et al, 2015) adapted from the Figure 2. Biogeochemical features of the water column (stations 1-10) illustrated by the observed vertical profiles of temperature (T), salinity (S), oxygen (O 2 ), hydrogen sulfide (HS À ) beam attenuation coefficient (as a proxy of suspended particulate matter), dissolved manganese (Mn D ), dissolved iron (Fe D ), nitrate (NO À 3 ), dissolved Hg (Hg D ), and MeHg (MeHg D ).…”

“…Global Biogeochemical Cycles 10.1002/2017GB005700 WASP7 Hg model /MERC7 sub-model (Wool et al, 2001) and already succefully applied in shallow waters (Canu & Rosati 2017;Melaku Canu et al, 2015). One-dimensional (1-D) modeling has widely been used to investigate the biogeochemical and ecological features of the basin (Grégoire & Soetaert, 2010;Konovalov et al, 2004;Lamborg et al, 2008;Oguz et al, 2000;Yakushev et al, 2007).…”

Supplementary material to "HR3DHG version 1: modelling the spatio-temporal dynamics of mercury in the Augusta Bay (southern Italy)"

“…The spatio-temporal dynamics of the dissolved elemental mercury concentration (Hg 0 ) in the Augusta basin (Zhang et al, 2014;Melaku Canu et al, 2015;Whalin et al, 2007;Monperrus et al, 2007b;Bagnato et al, 2013) is described by the following partial differential equation (PDE):…”

“…A fixed time step of 300 sec has been chosen to satisfy the several stability conditions and constrains associated to the adopted numerical method (Tveito and Winther, 1998). 20 The parameters are obtained according to Melaku Canu et al (2015) and Zhang et al (2014) (Zhang et al, 2014;Melaku Canu et al, 2015;Horvat et al, 2003), while the components of the velocity field are reproduced for the year 2011 by using the hydrodynamic 3D SHYFEM model (Umgiesser et al, 2004;Umgiesser, 2009). The horizontal and vertical turbulent diffusivities (Pacanowski and Philander, 1981;Denman and Gargett, 1983;Peters et al, 1988;Massel, 1999;Katz et al, 1979;Thi et al, 2005) are calibrated in order to fit the experimental data both for total and dissolved mercury concentrations in seawater and for the mercury fluxes at the 3D domain boundaries.…”