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# Climate Policy Publication details, including instructions for authors and subscription information: http://www.tandfonline.com/loi/tcpo20 

# Corrigendum to: Incremental CH 4 

# and N 2

# O mitigation benefits consistent with the U.S. Government's SC-CO 2



# estimates
Alex L. Marten a 

## , Elizabeth A. Kopits a 

## , Charles W. Griffiths a 

## , Stephen C. Newbold a

## & Ann Wolverton a

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 CH 4 

## and N 2

## O 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 CH 4 

# and N 2 

# O mitigation benefits consistent with the U.S. Government’s SC-CO 2 

# 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 (CH 4

### ) and nitrous oxide (N2 

### O) holdsunder the revised estimates, however, the quantitative relationship changes slightly. Under the original estimates the global damage potential for CH 4 

### 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 CH 4 

### 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% 95 th Percentile
2020 CO 2 12 42 62 123 CH 4 540 1,200 1,600 3,200 N 2 O 4,700 15,000 22,000 39,000 2050 CO 2 26 69 95 212 CH 4 1,300 2,500 3,100 6,700 N 2 O 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.

### 24–108% higher in 2050. Under the original estimates the global damage potential for N2 

### O 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 N2 

### O 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 CH 4 

### and N 2 

### O 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 CH 4 

### and N 2 

### O 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 CH 4 

### and N2 

### O 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% 95 th Percentile
2020 CH 4 46 29 26 26 N 2 O 399 360 355 318 2050 CH 4 52 36 32 31 N 2 O 416 390 389 339 Corrigendum 679

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