| Title |
North American terrestrial CO2 uptake largely offset by CH4 and N2O emissions: toward a full accounting of the greenhouse gas budget
|
|---|---|
| Published in |
Climatic Change, March 2014
|
| DOI | 10.1007/s10584-014-1072-9 |
| Pubmed ID | |
| Authors |
Hanqin Tian, Guangsheng Chen, Chaoqun Lu, Xiaofeng Xu, Daniel J. Hayes, Wei Ren, Shufen Pan, Deborah N. Huntzinger, Steven C. Wofsy |
| Abstract |
The terrestrial ecosystems of North America have been identified as a sink of atmospheric CO2 though there is no consensus on the magnitude. However, the emissions of non-CO2 greenhouse gases (CH4 and N2O) may offset or even overturn the climate cooling effect induced by the CO2 sink. Using a coupled biogeochemical model, in this study, we have estimated the combined global warming potentials (GWP) of CO2, CH4 and N2O fluxes in North American terrestrial ecosystems and quantified the relative contributions of environmental factors to the GWP changes during 1979-2010. The uncertainty range for contemporary global warming potential has been quantified by synthesizing the existing estimates from inventory, forward modeling, and inverse modeling approaches. Our "best estimate" of net GWP for CO2, CH4 and N2O fluxes was -0.50 ± 0.27 Pg CO2 eq/year (1 Pg = 10(15) g) in North American terrestrial ecosystems during 2001-2010. The emissions of CH4 and N2O from terrestrial ecosystems had offset about two thirds (73 %±14 %) of the land CO2 sink in the North American continent, showing large differences across the three countries, with offset ratios of 57 % ± 8 % in US, 83 % ± 17 % in Canada and 329 % ± 119 % in Mexico. Climate change and elevated tropospheric ozone concentration have contributed the most to GWP increase, while elevated atmospheric CO2 concentration have contributed the most to GWP reduction. Extreme drought events over certain periods could result in a positive GWP. By integrating the existing estimates, we have found a wide range of uncertainty for the combined GWP. From both climate change science and policy perspectives, it is necessary to integrate ground and satellite observations with models for a more accurate accounting of these three greenhouse gases in North America. |
X Demographics
The data shown below were collected from the profiles of 6 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 | 3 | 50% |
| Finland | 1 | 17% |
| Sweden | 1 | 17% |
| Unknown | 1 | 17% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Members of the public | 4 | 67% |
| Science communicators (journalists, bloggers, editors) | 1 | 17% |
| Scientists | 1 | 17% |
Mendeley readers
The data shown below were compiled from readership statistics for 129 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Germany | 1 | <1% |
| Switzerland | 1 | <1% |
| India | 1 | <1% |
| Canada | 1 | <1% |
| Mexico | 1 | <1% |
| United States | 1 | <1% |
| Unknown | 123 | 95% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Ph. D. Student | 36 | 28% |
| Researcher | 30 | 23% |
| Other | 11 | 9% |
| Student > Master | 9 | 7% |
| Professor > Associate Professor | 6 | 5% |
| Other | 16 | 12% |
| Unknown | 21 | 16% |
| Readers by discipline | Count | As % |
|---|---|---|
| Environmental Science | 48 | 37% |
| Agricultural and Biological Sciences | 17 | 13% |
| Earth and Planetary Sciences | 16 | 12% |
| Engineering | 5 | 4% |
| Computer Science | 4 | 3% |
| Other | 11 | 9% |
| Unknown | 28 | 22% |
Attention Score in Context
This research output has an Altmetric Attention Score of 17. 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 01 April 2015.
All research outputs
#1,926,841
of 23,577,654 outputs
Outputs from Climatic Change
#1,262
of 5,860 outputs
Outputs of similar age
#20,079
of 222,436 outputs
Outputs of similar age from Climatic Change
#17
of 74 outputs
Altmetric has tracked 23,577,654 research outputs across all sources so far. Compared to these this one has done particularly well and is in the 91st percentile: it's in the top 10% of all research outputs ever tracked by Altmetric.
So far Altmetric has tracked 5,860 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 21.1. This one has done well, scoring higher than 78% of its peers.
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We're also able to compare this research output to 74 others from the same source and published within six weeks on either side of this one. This one has done well, scoring higher than 77% of its contemporaries.