Large mercury release from the Greenland Ice Sheet invalidated-Reference-Cited by-同舟云学术

Large mercury release from the Greenland Ice Sheet invalidated

Published:2024-01-26 Issue:4 Volume:10 Page:
ISSN:2375-2548
Container-title:Science Advances
language:en
Short-container-title:Sci. Adv.

Author:

Jørgensen Christian Juncher¹^ORCID,Søndergaard Jens¹^ORCID,Larsen Martin Mørk¹^ORCID,Kjeldsen Kristian Kjellerup²^ORCID,Rosa Diogo²^ORCID,Sapper Sarah Elise³^ORCID,Heimbürger-Boavida Lars-Eric⁴^ORCID,Kohler Stephen G.⁵^ORCID,Wang Feiyue⁶^ORCID,Gao Zhiyuan⁶,Armstrong Debbie⁶^ORCID,Albers Christian Nyrop²^ORCID

Affiliation:

1. Department of Ecoscience, Aarhus University, Roskilde 4000, Denmark.

2. Geological Survey of Denmark and Greenland, Copenhagen 1350, Denmark.

3. Department of Geosciences and Natural Resource Management, University of Copenhagen; Frederiksberg C, 1958, Denmark.

4. Aix-Marseille Université, CNRS/INSU, Université de Toulon, IRD, Mediterranean Institute of Oceanography (MIO), Marseille, France.

5. Department of Chemistry, Norwegian University of Science and Technology (NTNU), Trondheim 7491, Norway.

6. Centre for Earth Observation Science, and Department of Environment and Geography, University of Manitoba, Winnipeg MB R3T2N2, Canada.

Abstract

The major input of mercury (Hg) to the Arctic is normally ascribed to long-range transport of anthropogenic Hg emissions. Recently, alarming concentrations of Hg in meltwater from the Greenland Ice Sheet (GrIS) were reported with bedrock as the proposed source. Reported Hg concentrations were 100 to 1000 times higher than in known freshwater systems of Greenland, calling for independent validation of the extraordinary concentrations and conclusions. Here, we present measurements of Hg at 21 glacial outlets in West Greenland showing that extreme Hg concentrations cannot be reproduced. In contrast, we find that meltwater from below the GrIS is very low in Hg, has minor implications for the global Hg budget, and pose only a very limited risk for local communities and the natural environment of Greenland.

Publisher

American Association for the Advancement of Science (AAAS)

Link

https://www.science.org/doi/pdf/10.1126/sciadv.adi7760

Reference21 articles.

1. Arctic mercury cycling

2. Arctic Monitoring and Assessment Programme (AMAP) Mercury in the Arctic (AMAP 2021) pp. 1–324.

3. Large subglacial source of mercury from the southwestern margin of the Greenland Ice Sheet

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