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Enhanced CO 2 uptake at a shallow Arctic Ocean seep field overwhelms the positive warming potential of emitted methane

Overview of attention for article published in Proceedings of the National Academy of Sciences of the United States of America, May 2017
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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 (99th percentile)
  • High Attention Score compared to outputs of the same age and source (95th percentile)

Mentioned by

news
19 news outlets
blogs
4 blogs
twitter
201 tweeters
facebook
11 Facebook pages
wikipedia
1 Wikipedia page
googleplus
8 Google+ users
reddit
3 Redditors

Citations

dimensions_citation
9 Dimensions

Readers on

mendeley
74 Mendeley
Title
Enhanced CO 2 uptake at a shallow Arctic Ocean seep field overwhelms the positive warming potential of emitted methane
Published in
Proceedings of the National Academy of Sciences of the United States of America, May 2017
DOI 10.1073/pnas.1618926114
Pubmed ID
Authors

John W. Pohlman, Jens Greinert, Carolyn Ruppel, Anna Silyakova, Lisa Vielstädte, Michael Casso, Jürgen Mienert, Stefan Bünz

Abstract

Continued warming of the Arctic Ocean in coming decades is projected to trigger the release of teragrams (1 Tg = 10(6) tons) of methane from thawing subsea permafrost on shallow continental shelves and dissociation of methane hydrate on upper continental slopes. On the shallow shelves (<100 m water depth), methane released from the seafloor may reach the atmosphere and potentially amplify global warming. On the other hand, biological uptake of carbon dioxide (CO2) has the potential to offset the positive warming potential of emitted methane, a process that has not received detailed consideration for these settings. Continuous sea-air gas flux data collected over a shallow ebullitive methane seep field on the Svalbard margin reveal atmospheric CO2 uptake rates (-33,300 ± 7,900 μmol m(-2)⋅d(-1)) twice that of surrounding waters and ∼1,900 times greater than the diffusive sea-air methane efflux (17.3 ± 4.8 μmol m(-2)⋅d(-1)). The negative radiative forcing expected from this CO2 uptake is up to 231 times greater than the positive radiative forcing from the methane emissions. Surface water characteristics (e.g., high dissolved oxygen, high pH, and enrichment of (13)C in CO2) indicate that upwelling of cold, nutrient-rich water from near the seafloor accompanies methane emissions and stimulates CO2 consumption by photosynthesizing phytoplankton. These findings challenge the widely held perception that areas characterized by shallow-water methane seeps and/or strongly elevated sea-air methane flux always increase the global atmospheric greenhouse gas burden.

Twitter Demographics

The data shown below were collected from the profiles of 201 tweeters who shared this research output. Click here to find out more about how the information was compiled.

Mendeley readers

The data shown below were compiled from readership statistics for 74 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
United Kingdom 2 3%
Chile 1 1%
United States 1 1%
Unknown 70 95%

Demographic breakdown

Readers by professional status Count As %
Researcher 21 28%
Student > Ph. D. Student 20 27%
Student > Doctoral Student 6 8%
Unspecified 6 8%
Professor 4 5%
Other 17 23%
Readers by discipline Count As %
Earth and Planetary Sciences 27 36%
Environmental Science 16 22%
Unspecified 11 15%
Agricultural and Biological Sciences 5 7%
Biochemistry, Genetics and Molecular Biology 4 5%
Other 11 15%

Attention Score in Context

This research output has an Altmetric Attention Score of 332. 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 15 September 2017.
All research outputs
#29,650
of 12,355,895 outputs
Outputs from Proceedings of the National Academy of Sciences of the United States of America
#765
of 77,491 outputs
Outputs of similar age
#1,647
of 264,748 outputs
Outputs of similar age from Proceedings of the National Academy of Sciences of the United States of America
#46
of 939 outputs
Altmetric has tracked 12,355,895 research outputs across all sources so far. Compared to these this one has done particularly well and is in the 99th percentile: it's in the top 5% of all research outputs ever tracked by Altmetric.
So far Altmetric has tracked 77,491 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 22.1. 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 264,748 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 99% of its contemporaries.
We're also able to compare this research output to 939 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 95% of its contemporaries.