Elemental mercury in Atlantic surface water during Polarstern cruise ANT-XXV/5


During the Polarstern cruise ANT-XXV/5 in April/May 2009, surface seawater from below the ship's hull was continuously pumped through a shower head into a 20 L equilibrator bottle and drained at the bottom. Equilibrium between the supplied water and the headspace air (Hg0 equ) was achieved in about 1 h. The equilibrated air was transferred to the TEKRAN 2537A after closing the drain and elemetal mercury (Hg0) was preconcentrated by amalgamation on gold traps and finally analyzed by cold vapor atomic fluorescence spectrometry. The detection limit was 0.1 ng L-1. Wind speed was taken from the Polarstern Meteorological station and surface water salinity and temperature from the thermosalinograph. Hg0 equil. was a duplicate measurement of the headspace and provided at standard reference condition of 0°C by the Tekran instrument. The value was corrected to the in situ temperature and divided by Henry's Law constant at respective sea surface water temperature.

Further notes on calculated parameters: H surf ocean and H equil: Solubility of elemental mercury according to Sanemasa (1975) at surface ocean temperature or equilibrator temperature in °C by using the fit H-Sanemasa = 0.000000442T^3 + 0.000068931T^2 + 0.005360591T + 0.16096243 * Hg0-equi sea surface (ng m-3), recalculated from the measurement result Hg0 equil. (ng m-3) at 0°C to in situ temperature by accounting for the solubility difference between equilibrator and the surface ocean (H equil./H surf ocean). This was used for the flux calculation.* Hg0 surf. water (ng m-3): final concentration of elemental mercury in surface water (same as in equilibrator water) in nanogram per cubic metre (Hg0 equil/H-equi)H-equi refers to the Henry's Law constant at a certain temperature (sea surface, equilibrator).

DOI https://doi.org/10.1594/PANGAEA.961639
Related Identifier https://doi.org/10.1029/2010GB003998
Related Identifier https://doi.org/10.2312/BzPM_0603_2010
Related Identifier https://doi.org/10.1246/bcsj.48.1795
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.961639
Creator Kuss, Joachim ORCID logo; Schneider, Bernd
Publisher PANGAEA
Publication Year 2023
Funding Reference Deutsche Forschungsgemeinschaft, Bonn https://doi.org/10.13039/501100001659 Crossref Funder ID 58202066 https://gepris.dfg.de/gepris/projekt/58202066 Marine Quecksilberemissionen: Messungen im Atlantik und Prozesstudien im Labor (QueMar)
Rights Creative Commons Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Language English
Resource Type Dataset
Format text/tab-separated-values
Size 5256 data points
Discipline Jurisprudence; Law; Social and Behavioural Sciences
Spatial Coverage (-63.401W, -49.663S, -5.717E, 48.662N)
Temporal Coverage Begin 2009-04-13T16:52:25Z
Temporal Coverage End 2009-05-20T23:52:31Z