Climatic and anthropogenic effects on atmospheric mercury accumulation rates in ombrotrophic bogs from Southern Ontario

2003 ◽  
Vol 107 ◽  
pp. 541-544
Author(s):  
N. Givelet ◽  
F. Roos-Barraclough ◽  
W. Shotyk
Keyword(s):  
Atmospheric Mercury ◽  
Anthropogenic Effects ◽  
Mercury Accumulation ◽  
Accumulation Rates ◽  
Southern Ontario

scholarly journals Diatom ooze—A large marine mercury sink

Science ◽  
2018 ◽  
Vol 361 (6404) ◽  
pp. 797-800 ◽  
Author(s):  
Sara Zaferani ◽  
Marta Pérez-Rodríguez ◽  
Harald Biester
Keyword(s):  
High Resolution ◽  
Southern Ocean ◽  
Marine Sediment ◽  
Crucial Role ◽  
Anthropogenic Pollution ◽  
Atmospheric Mercury ◽  
Mercury Accumulation ◽  
Accumulation Rates ◽  
Sediment Data

The role of algae for sequestration of atmospheric mercury in the ocean is largely unknown owing to a lack of marine sediment data. We used high-resolution cores from marine Antarctica to estimate Holocene global mercury accumulation in biogenic siliceous sediments (diatom ooze). Diatom ooze exhibits the highest mercury accumulation rates ever reported for the marine environment and provides a large sink of anthropogenic mercury, surpassing existing model estimates by as much as a factor of 7. Anthropogenic pollution of the Southern Ocean began ~150 years ago, and up to 20% of anthropogenic mercury emitted to the atmosphere may have been stored in diatom ooze. These findings reveal the crucial role of diatoms as a fast vector for mercury sequestration and diatom ooze as a large marine mercury sink.

Atmospheric Mercury Accumulation Rates Between 5900 and 800 Calibrated Years BP in the High Arctic of Canada Recorded by Peat Hummocks

2004 ◽  
Vol 38 (19) ◽  
pp. 4964-4972 ◽  
Author(s):  
Nicolas Givelet ◽  
Fiona Roos-Barraclough ◽  
Michael E. Goodsite ◽  
Andriy K. Cheburkin ◽  
William Shotyk
Keyword(s):  
High Arctic ◽  
Atmospheric Mercury ◽  
Mercury Accumulation ◽  
Accumulation Rates

Response to Comment on “Atmospheric Mercury Accumulation Rates between 5900 and 800 Calibrated Years BP in the High Arctic of Canada Recorded by Peat Hummocks”

2005 ◽  
Vol 39 (3) ◽  
pp. 910-912 ◽  
Author(s):  
William Shotyk ◽  
Nicolas Givelet ◽  
Andriy K. Cheburkin ◽  
Michael E. Goodsite ◽  
Fiona Roos-Barraclough
Keyword(s):  
High Arctic ◽  
Atmospheric Mercury ◽  
Mercury Accumulation ◽  
Accumulation Rates

scholarly journals Chronology of the Atmospheric Mercury in Lagoa da Pata Basin, Upper Rio Negro Region of Brazilian Amazon

Radiocarbon ◽  
2001 ◽  
Vol 43 (2B) ◽  
pp. 801-808 ◽  
Author(s):  
G M Santos ◽  
R C Cordeiro ◽  
E V Silva Filho ◽  
B Turcq ◽  
L D Lacerda ◽  
...  
Keyword(s):  
Forest Fires ◽  
Accumulation Rate ◽  
Atmospheric Mercury ◽  
Mercury Accumulation ◽  
Accumulation Rates ◽  
Inorganic Layer ◽  
The Core ◽  
Rio Negro ◽  
Short Period ◽  
Rapid Accumulation

We present prehistoric mercury accumulation rates in a dated sediment core from Lagoa da Pata, a remote lake in São Gabriel da Cachoeira, northern Amazon. The sediment samples were subdivided for mercury and radiocarbon analyses. A group of 18 samples have been prepared at ANU for 14C dating by accelerator mass spectrometry (AMS). The dating results show a good correlation with depth in the core, down to 41,500 BP. Three distinct sections are clearly identified in the core. They consist of upper and lower organic-rich layers, separated by an inorganic layer which represents a short period of rapid accumulation around 18 ka BP. The mercury accumulation rate is found to be larger in the upper layer (18 ka to present) than in the lower one (41 ka to 25 ka), by a factor of three. The larger accumulation rate of mercury is probably associated with warmer temperatures and a higher frequency of forest fires during the Holocene.

Mercury Accumulation Rates and Spatial Patterns in Lake Sediments from West Greenland:  A Coast to Ice Margin Transect

2001 ◽  
Vol 35 (9) ◽  
pp. 1736-1741 ◽  
Author(s):  
Richard Bindler ◽  
Ingemar Renberg ◽  
Peter G. Appleby ◽  
N. John Anderson ◽  
Neil L. Rose
Keyword(s):  
Lake Sediments ◽  
Spatial Patterns ◽  
Mercury Accumulation ◽  
Accumulation Rates ◽  
West Greenland

scholarly journals Biogeochemical processes accounting for the natural mercury variations in the Southern Ocean diatom ooze sediments

Ocean Science ◽  
2020 ◽  
Vol 16 (3) ◽  
pp. 729-741
Author(s):  
Sara Zaferani ◽  
Harald Biester
Keyword(s):  
Primary Production ◽  
Sea Surface ◽  
Water Phase ◽  
Mercury Accumulation ◽  
Accumulation Rates ◽  
Biological Production ◽  
High Accumulation ◽  
Phytoplankton Productivity ◽  
Surface Conditions ◽  
Mercury Cycle

Abstract. Due to its toxic nature and its high potential for biomagnification, mercury is a pollutant of concern. Understanding the marine biogeochemical cycle of mercury is crucial as consumption of mercury-enriched marine fish is the most important pathway of human exposure to monomethylmercury, a neurotoxin. However, due to the lack of long-term marine records, the role of the oceans in the global mercury cycle is poorly understood. We do not have well-documented data of natural mercury accumulations during changing environmental conditions, e.g., sea surface conditions in the ocean. To understand the influence of different sea surface conditions (climate-induced changes in ice coverage and biological production) on natural mercury accumulation, we used a continuous ∼170 m Holocene biogenic sedimentary record from Adélie Basin, East Antarctica, which mainly consists of silica-based skeletons of diatoms. We performed principal component analysis and regression analysis on element concentrations and corresponding residuals, respectively, to investigate the link between sediment mercury accumulation, terrestrial inputs, and phytoplankton productivity. Preindustrial mercury in the remote marine basin shows extremely high accumulation rates (median: 556 µg m−2 yr−1) that displayed periodic-like variations. Our analyses show that the variations in total mercury concentrations and accumulation rates are associated with biological production and related scavenging of water-phase mercury by rapidly sinking algae or algae-derived organic matter after intense algae blooms. High accumulation rates of other major and trace elements further reveal that, in regions of high primary productivity, settling of biogenic materials removes a large fraction of dissolved or particulate-bound elements from the free water phase through scavenging or biological uptake. The link between mercury cycling and primary production will need to be considered in future studies of the marine mercury cycle under primary production enhancement through climatic, temperature, and nutrient availability changes.

Atmospheric mercury accumulation and washoff processes on impervious urban surfaces

2008 ◽  
Vol 42 (32) ◽  
pp. 7429-7438 ◽  
Author(s):  
Chris S. Eckley ◽  
Brian Branfireun ◽  
Miriam Diamond ◽  
Peter C. Van Metre ◽  
Frank Heitmuller
Keyword(s):  
Atmospheric Mercury ◽  
Mercury Accumulation

scholarly journals Biogeochemical processes accounting for the natural mercury variations in the Southern Ocean diatom ooze sediments

2020 ◽  
Author(s):  
Sara Zaferani ◽  
Harald Biester
Keyword(s):  
Primary Production ◽  
Sea Surface ◽  
Mercury Accumulation ◽  
Accumulation Rates ◽  
Biological Production ◽  
High Accumulation ◽  
Surface Conditions ◽  
Element Concentrations ◽  
Mercury Uptake ◽  
Mercury Cycle

Abstract. Understanding the marine biogeochemical cycle of mercury is crucial as consumption of mercury enriched marine fish is the most important pathway of mercury uptake by humans. However, due to the lack of long term marine records, the role of the oceans in the global mercury cycle is poorly understood and we do not have well documented data of natural mercury accumulations during changing environmental conditions, e.g. sea surface conditions in the ocean. To understand influence of different sea surface conditions (climate induced changes in ice coverage and biological production) on natural mercury accumulation, we used a continuous ~ 170 m Holocene biogenic sedimentary record from Adélie Basin, East Antarctica, which mainly consists of silica based skeletons of diatoms. We performed Principal Component Analysis and regression analysis on element concentrations and corresponding residual of element concentrations, respectively to investigate the link between sediment mercury accumulation, terrestrial inputs, and productivity. Preindustrial mercury accumulation in the remote pristine marine Antarctica showed extremely high accumulation rates (median: 556 µg m−2 yr−1) that displayed periodic-like variations. Our analysis shows that the variations in total mercury concentrations and accumulation rates are associated with biological production and related scavenging of available water phase mercury by rapidly sinking algae or algae derived organic matter after intense algae blooms. High accumulation rates of other studied elements further revealed that in regions of high primary productivity, settling of biogenic materials removes many other elements from ocean surface (through scavenging or biological uptake). In conclusion, the link between mercury cycling and primary production will need to be considered in future studies of the marine mercury cycle under future primary production enhancement through climatic, temperature, and nutrient availability changes.

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