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Corrigendum to: Incremental CH4 and N2O

mitigation benefits consistent with the U.S.

Government's SC-CO2 estimates

Alex L. Martena, Elizabeth A. Kopitsa, Charles W. Griffithsa, Stephen C.

Newbolda & Ann Wolvertona

a

 National Center for Environmental Economics, U.S. Environmental

Protection Agency, 1200 Pennsylvania Avenue, Washington, DC 20460, USA

Published online: 24 Jul 2015.

To cite this article: Alex L. Marten, Elizabeth A. Kopits, Charles W. Griffiths, Stephen C. Newbold & Ann

Wolverton (2015) Corrigendum to: Incremental CH4 and N2O mitigation benefits consistent with the U.S.

Government's SC-CO2 estimates, Climate Policy, 15:5, 678-679, DOI: 10.1080/14693062.2015.1070550

To link to this article: http://dx.doi.org/10.1080/14693062.2015.1070550

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B corrigendum

Corrigendum to: Incremental CH4 and N2O mitigation

benefits consistent with the U.S. Government’s SC-CO2

estimates

ALEX L. MARTEN*, ELIZABETH A. KOPITS, CHARLES W. GRIFFITHS, STEPHEN C. NEWBOLD,

ANN WOLVERTON†

National Center for Environmental Economics, U.S. Environmental Protection Agency, 1200 Pennsylvania Avenue, Washington, DC

20460, USA

Due to an indexing error the results from one of the three models used, the PAGE model, were in 2008

U.S. dollars and not 2007 U.S. dollars as was intended. The conclusions of the paper are largely

unchanged but the corrected quantitative social cost estimates for the gases when all model results

are in 2007 U.S. dollars are slightly different. A revised version of Table 5 in the paper which contained

the social cost estimates pooled across all three models, and Table 6 which presented the global damage

potentials, are presented below.

Our qualitative result that the 100-year global warming potential (GWP) probably provides an

underestimate of the global damage potential of methane (CH4) and nitrous oxide (N2O) holds

under the revised estimates, however, the quantitative relationship changes slightly. Under the original estimates the global damage potential for CH4 was 0–84% higher in 2020 than the 100-year

GWP reported in the IPCC’s Fourth Assessment Report, 25, and 24–108% higher in 2050. Under the

revised estimates the global damage potential for CH4 is 4–84% higher than the GWP in 2020 and

TABLE 1 SC-X [2007$ per ton]

Year Gas

5.0%

Mean

3.0%

Mean

2.5%

Mean 3% 95th Percentile

2020 CO2 12 42 62 123

CH4 540 1,200 1,600 3,200

N2O 4,700 15,000 22,000 39,000

2050 CO2 26 69 95 212

CH4 1,300 2,500 3,100 6,700

N2O 11,000 27,000 37,000 72,000

B *Corresponding author. E-mail: marten.alex@epa.gov †

The views expressed in this paper are those of the authors and do not necessarily reflect the views or policies of the U.S.

Environmental Protection Agency.

Vol. 15, No. 5, 678 –679, http://dx.doi.org/10.1080/14693062.2015.1070550

This work was authored as part of the Contributor’s official duties as an Employee of the United States Government and is therefore a work

of the United States Government. In accordance with 17 USC. 105, no copyright protection is available for such works under US Law.

Downloaded by [US EPA Library] at 04:58 29 July 2015 
24–108% higher in 2050. Under the original estimates the global damage potential for N2O was 6–33%

higher in 2020 than the 100-year GWP reported in the IPCC’s Fourth Assessment Report, 298, and 13–

39% higher in 2050. Under the revised estimates the global damage potential for N2O is 7–34% higher

than the GWP in 2020 and 14–40% higher in 2050.

In the concluding remarks of the paper we presented estimates of the benefits from CH4 and N2O

emissions reductions forecast as a result of the recent standards regulating the fuel efficiency and

GHG emissions of light duty vehicles in the U.S. Using the original estimates the benefits of CH4

and N2O emissions reductions in 2020 were forecast to be US$85–493 million (2007$) and $1.5–12

million (2007$), respectively. Using the revised estimates the benefits of CH4 and N2O emissions

reductions in 2020 are forecast to be $83–493 million (2007$) and $1.4–12 million (2007$),

respectively.

TABLE 2 Global Damage Potential

Year Gas

5.0%

Mean

3.0%

Mean

2.5%

Mean 3% 95th Percentile

2020 CH4 46 29 26 26

N2O 399 360 355 318

2050 CH4 52 36 32 31

N2O 416 390 389 339

Corrigendum 679

CLIMATE POLICY

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