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Trends in mercury wet deposition and mercury air concentrations across the U.S. and Canada

Overview of attention for article published in Science of the Total Environment, October 2016
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About this Attention Score

  • In the top 5% of all research outputs scored by Altmetric
  • High Attention Score compared to outputs of the same age (98th percentile)
  • High Attention Score compared to outputs of the same age and source (99th percentile)

Mentioned by

news
16 news outlets
blogs
2 blogs
policy
1 policy source
facebook
1 Facebook page

Citations

dimensions_citation
95 Dimensions

Readers on

mendeley
104 Mendeley
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Title
Trends in mercury wet deposition and mercury air concentrations across the U.S. and Canada
Published in
Science of the Total Environment, October 2016
DOI 10.1016/j.scitotenv.2016.01.061
Pubmed ID
Authors

Peter S. Weiss-Penzias, David A. Gay, Mark E. Brigham, Matthew T. Parsons, Mae S. Gustin, Arnout ter Schure

Abstract

This study examined the spatial and temporal trends of mercury (Hg) in wet deposition and air concentrations in the United States (U.S.) and Canada between 1997 and 2013. Data were obtained from the National Atmospheric Deposition Program (NADP) and Environment Canada monitoring networks, and other sources. Of the 19 sites with data records from 1997-2013, 53% had significant negative trends in Hg concentration in wet deposition, while no sites had significant positive trends, which is in general agreement with earlier studies that considered NADP data up until about 2010. However, for the time period 2007-2013 (71 sites), 17% and 13% of the sites had significant positive and negative trends, respectively, and for the time period 2008-2013 (81 sites) 30% and 6% of the sites had significant positive and negative trends, respectively. Non-significant positive tendencies were also widespread. Regional trend analyses revealed significant positive trends in Hg concentration in the Rocky Mountains, Plains, and Upper Midwest regions for the recent time periods in addition to significant positive trends in Hg deposition for the continent as a whole. Sulfate concentration trends in wet deposition were negative in all regions, suggesting a lower importance of local Hg sources. The trend in gaseous elemental Hg from short-term datasets merged as one continuous record was broadly consistent with trends in Hg concentration in wet deposition, with the early time period (1998-2007) producing a significantly negative trend (-1.5±0.2%year(-1)) and the recent time period (2008-2013) displaying a flat slope (-0.3±0.1%year(-1), not significant). The observed shift to more positive or less negative trends in Hg wet deposition primarily seen in the Central-Western regions is consistent with the effects of rising Hg emissions from regions outside the U.S. and Canada and the influence of long-range transport in the free troposphere.

Mendeley readers

The data shown below were compiled from readership statistics for 104 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
United States 2 2%
Unknown 102 98%

Demographic breakdown

Readers by professional status Count As %
Student > Ph. D. Student 26 25%
Student > Master 17 16%
Researcher 12 12%
Other 9 9%
Student > Bachelor 7 7%
Other 26 25%
Unknown 7 7%
Readers by discipline Count As %
Environmental Science 38 37%
Chemistry 14 13%
Earth and Planetary Sciences 12 12%
Agricultural and Biological Sciences 8 8%
Engineering 3 3%
Other 11 11%
Unknown 18 17%

Attention Score in Context

This research output has an Altmetric Attention Score of 133. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 25 May 2018.
All research outputs
#230,353
of 21,329,785 outputs
Outputs from Science of the Total Environment
#213
of 22,209 outputs
Outputs of similar age
#4,832
of 373,910 outputs
Outputs of similar age from Science of the Total Environment
#1
of 331 outputs
Altmetric has tracked 21,329,785 research outputs across all sources so far. Compared to these this one has done particularly well and is in the 98th percentile: it's in the top 5% of all research outputs ever tracked by Altmetric.
So far Altmetric has tracked 22,209 research outputs from this source. They typically receive more attention than average, with a mean Attention Score of 9.2. This one has done particularly well, scoring higher than 99% of its peers.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 373,910 tracked outputs that were published within six weeks on either side of this one in any source. This one has done particularly well, scoring higher than 98% of its contemporaries.
We're also able to compare this research output to 331 others from the same source and published within six weeks on either side of this one. This one has done particularly well, scoring higher than 99% of its contemporaries.