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X Demographics
Mendeley readers
Attention Score in Context
| Title |
Isotope composition and volume of Earth’s early oceans
|
|---|---|
| Published in |
Proceedings of the National Academy of Sciences of the United States of America, March 2012
|
| DOI | 10.1073/pnas.1115705109 |
| Pubmed ID | |
| Authors |
Emily C. Pope, Dennis K. Bird, Minik T. Rosing |
| Abstract |
Oxygen and hydrogen isotope compositions of Earth's seawater are controlled by volatile fluxes among mantle, lithospheric (oceanic and continental crust), and atmospheric reservoirs. Throughout geologic time the oxygen mass budget was likely conserved within these Earth system reservoirs, but hydrogen's was not, as it can escape to space. Isotopic properties of serpentine from the approximately 3.8 Ga Isua Supracrustal Belt in West Greenland are used to characterize hydrogen and oxygen isotope compositions of ancient seawater. Archaean oceans were depleted in deuterium [expressed as δD relative to Vienna standard mean ocean water (VSMOW)] by at most 25 ± 5‰, but oxygen isotope ratios were comparable to modern oceans. Mass balance of the global hydrogen budget constrains the contribution of continental growth and planetary hydrogen loss to the secular evolution of hydrogen isotope ratios in Earth's oceans. Our calculations predict that the oceans of early Earth were up to 26% more voluminous, and atmospheric CH(4) and CO(2) concentrations determined from limits on hydrogen escape to space are consistent with clement conditions on Archaean Earth. |
X Demographics
The data shown below were collected from the profiles of 15 X users who shared this research output. Click here to find out more about how the information was compiled.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| United States | 4 | 27% |
| Germany | 2 | 13% |
| Greece | 1 | 7% |
| Puerto Rico | 1 | 7% |
| Chile | 1 | 7% |
| Argentina | 1 | 7% |
| United Kingdom | 1 | 7% |
| Unknown | 4 | 27% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Members of the public | 7 | 47% |
| Scientists | 6 | 40% |
| Science communicators (journalists, bloggers, editors) | 2 | 13% |
Mendeley readers
The data shown below were compiled from readership statistics for 212 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| United States | 4 | 2% |
| Germany | 3 | 1% |
| Canada | 2 | <1% |
| Argentina | 1 | <1% |
| India | 1 | <1% |
| Japan | 1 | <1% |
| Belgium | 1 | <1% |
| Unknown | 199 | 94% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Ph. D. Student | 53 | 25% |
| Researcher | 45 | 21% |
| Professor | 21 | 10% |
| Student > Master | 16 | 8% |
| Other | 13 | 6% |
| Other | 33 | 16% |
| Unknown | 31 | 15% |
| Readers by discipline | Count | As % |
|---|---|---|
| Earth and Planetary Sciences | 133 | 63% |
| Agricultural and Biological Sciences | 9 | 4% |
| Physics and Astronomy | 8 | 4% |
| Environmental Science | 7 | 3% |
| Engineering | 3 | 1% |
| Other | 10 | 5% |
| Unknown | 42 | 20% |
Attention Score in Context
This research output has an Altmetric Attention Score of 83. 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 09 August 2023.
All research outputs
#518,079
of 25,587,485 outputs
Outputs from Proceedings of the National Academy of Sciences of the United States of America
#9,037
of 103,382 outputs
Outputs of similar age
#2,299
of 169,015 outputs
Outputs of similar age from Proceedings of the National Academy of Sciences of the United States of America
#62
of 844 outputs
Altmetric has tracked 25,587,485 research outputs across all sources so far. Compared to these this one has done particularly well and is in the 97th percentile: it's in the top 5% of all research outputs ever tracked by Altmetric.
So far Altmetric has tracked 103,382 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 39.5. This one has done particularly well, scoring higher than 91% 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 169,015 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 844 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 92% of its contemporaries.