TransCom N[subscript 2]O model inter-comparison – Part 2: Atmospheric inversion estimates of N[subscript 2]O emissions
This study examines N[subscript 2]O emission estimates from five different atmospheric inversion frameworks based on chemistry transport models (CTMs). The five frameworks differ in the choice of CTM, meteorological data, prior uncertainties and inversion method but use the same prior emissions and...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , |
|---|---|
| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
Copernicus GmbH
2014
|
| Online Access: | http://hdl.handle.net/1721.1/89835 https://orcid.org/0000-0001-5925-3801 https://orcid.org/0000-0003-2233-8945 |
| _version_ | 1811086676053721088 |
|---|---|
| author | Thompson, R. L. Ishijima, K. Corazza, M. Karstens, U. Patra, P. K. Bergamaschi, P. Chevallier, F. Dlugokencky, E. Weiss, R. F. O'Doherty, Simon Fraser, P. J. Steele, L. P. Krummel, P. B. Vermeulen, A. Tohjima, Y. Jordan, Andres Haszpra, L. Steinbacher, M. Van der Laan, S. Aalto, T. Meinhardt, F. Popa, M. E. Moncrieff, J. Bousquet, P. Saikawa, Eri Prinn, Ronald G. |
| author2 | Massachusetts Institute of Technology. Center for Global Change Science |
| author_facet | Massachusetts Institute of Technology. Center for Global Change Science Thompson, R. L. Ishijima, K. Corazza, M. Karstens, U. Patra, P. K. Bergamaschi, P. Chevallier, F. Dlugokencky, E. Weiss, R. F. O'Doherty, Simon Fraser, P. J. Steele, L. P. Krummel, P. B. Vermeulen, A. Tohjima, Y. Jordan, Andres Haszpra, L. Steinbacher, M. Van der Laan, S. Aalto, T. Meinhardt, F. Popa, M. E. Moncrieff, J. Bousquet, P. Saikawa, Eri Prinn, Ronald G. |
| author_sort | Thompson, R. L. |
| collection | MIT |
| description | This study examines N[subscript 2]O emission estimates from five different atmospheric inversion frameworks based on chemistry transport models (CTMs). The five frameworks differ in the choice of CTM, meteorological data, prior uncertainties and inversion method but use the same prior emissions and observation data set. The posterior modelled atmospheric N[subscript 2]O mole fractions are compared to observations to assess the performance of the inversions and to help diagnose problems in the modelled transport. Additionally, the mean emissions for 2006 to 2008 are compared in terms of the spatial distribution and seasonality. Overall, there is a good agreement among the inversions for the mean global total emission, which ranges from 16.1 to 18.7 TgN yr[superscript −1] and is consistent with previous estimates. Ocean emissions represent between 31 and 38% of the global total compared to widely varying previous estimates of 24 to 38%. Emissions from the northern mid- to high latitudes are likely to be more important, with a consistent shift in emissions from the tropics and subtropics to the mid- to high latitudes in the Northern Hemisphere; the emission ratio for 0–30° N to 30–90° N ranges from 1.5 to 1.9 compared with 2.9 to 3.0 in previous estimates. The largest discrepancies across inversions are seen for the regions of South and East Asia and for tropical and South America owing to the poor observational constraint for these areas and to considerable differences in the modelled transport, especially inter-hemispheric exchange rates and tropical convective mixing. Estimates of the seasonal cycle in N[subscript 2]O emissions are also sensitive to errors in modelled stratosphere-to-troposphere transport in the tropics and southern extratropics. Overall, the results show a convergence in the global and regional emissions compared to previous independent studies. |
| first_indexed | 2024-09-23T13:29:37Z |
| format | Article |
| id | mit-1721.1/89835 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T13:29:37Z |
| publishDate | 2014 |
| publisher | Copernicus GmbH |
| record_format | dspace |
| spelling | mit-1721.1/898352022-10-01T15:33:34Z TransCom N[subscript 2]O model inter-comparison – Part 2: Atmospheric inversion estimates of N[subscript 2]O emissions Thompson, R. L. Ishijima, K. Corazza, M. Karstens, U. Patra, P. K. Bergamaschi, P. Chevallier, F. Dlugokencky, E. Weiss, R. F. O'Doherty, Simon Fraser, P. J. Steele, L. P. Krummel, P. B. Vermeulen, A. Tohjima, Y. Jordan, Andres Haszpra, L. Steinbacher, M. Van der Laan, S. Aalto, T. Meinhardt, F. Popa, M. E. Moncrieff, J. Bousquet, P. Saikawa, Eri Prinn, Ronald G. Massachusetts Institute of Technology. Center for Global Change Science Saikawa, Eri Prinn, Ronald G. This study examines N[subscript 2]O emission estimates from five different atmospheric inversion frameworks based on chemistry transport models (CTMs). The five frameworks differ in the choice of CTM, meteorological data, prior uncertainties and inversion method but use the same prior emissions and observation data set. The posterior modelled atmospheric N[subscript 2]O mole fractions are compared to observations to assess the performance of the inversions and to help diagnose problems in the modelled transport. Additionally, the mean emissions for 2006 to 2008 are compared in terms of the spatial distribution and seasonality. Overall, there is a good agreement among the inversions for the mean global total emission, which ranges from 16.1 to 18.7 TgN yr[superscript −1] and is consistent with previous estimates. Ocean emissions represent between 31 and 38% of the global total compared to widely varying previous estimates of 24 to 38%. Emissions from the northern mid- to high latitudes are likely to be more important, with a consistent shift in emissions from the tropics and subtropics to the mid- to high latitudes in the Northern Hemisphere; the emission ratio for 0–30° N to 30–90° N ranges from 1.5 to 1.9 compared with 2.9 to 3.0 in previous estimates. The largest discrepancies across inversions are seen for the regions of South and East Asia and for tropical and South America owing to the poor observational constraint for these areas and to considerable differences in the modelled transport, especially inter-hemispheric exchange rates and tropical convective mixing. Estimates of the seasonal cycle in N[subscript 2]O emissions are also sensitive to errors in modelled stratosphere-to-troposphere transport in the tropics and southern extratropics. Overall, the results show a convergence in the global and regional emissions compared to previous independent studies. 2014-09-19T14:22:32Z 2014-09-19T14:22:32Z 2014-06 2014-05 Article http://purl.org/eprint/type/JournalArticle 1680-7324 1680-7316 http://hdl.handle.net/1721.1/89835 Thompson, R. L., K. Ishijima, E. Saikawa, M. Corazza, U. Karstens, P. K. Patra, P. Bergamaschi, et al. “TransCom N[subscript 2]O Model Inter-Comparison – Part 2: Atmospheric Inversion Estimates of N[subscript 2]O Emissions.” Atmospheric Chemistry and Physics 14, no. 12 (2014): 6177–6194. https://orcid.org/0000-0001-5925-3801 https://orcid.org/0000-0003-2233-8945 en_US http://dx.doi.org/10.5194/acp-14-6177-2014 Atmospheric Chemistry and Physics Creative Commons Attribution http://creativecommons.org/licenses/by/3.0/ application/pdf Copernicus GmbH Copernicus Publications |
| spellingShingle | Thompson, R. L. Ishijima, K. Corazza, M. Karstens, U. Patra, P. K. Bergamaschi, P. Chevallier, F. Dlugokencky, E. Weiss, R. F. O'Doherty, Simon Fraser, P. J. Steele, L. P. Krummel, P. B. Vermeulen, A. Tohjima, Y. Jordan, Andres Haszpra, L. Steinbacher, M. Van der Laan, S. Aalto, T. Meinhardt, F. Popa, M. E. Moncrieff, J. Bousquet, P. Saikawa, Eri Prinn, Ronald G. TransCom N[subscript 2]O model inter-comparison – Part 2: Atmospheric inversion estimates of N[subscript 2]O emissions |
| title | TransCom N[subscript 2]O model inter-comparison – Part 2: Atmospheric inversion estimates of N[subscript 2]O emissions |
| title_full | TransCom N[subscript 2]O model inter-comparison – Part 2: Atmospheric inversion estimates of N[subscript 2]O emissions |
| title_fullStr | TransCom N[subscript 2]O model inter-comparison – Part 2: Atmospheric inversion estimates of N[subscript 2]O emissions |
| title_full_unstemmed | TransCom N[subscript 2]O model inter-comparison – Part 2: Atmospheric inversion estimates of N[subscript 2]O emissions |
| title_short | TransCom N[subscript 2]O model inter-comparison – Part 2: Atmospheric inversion estimates of N[subscript 2]O emissions |
| title_sort | transcom n subscript 2 o model inter comparison part 2 atmospheric inversion estimates of n subscript 2 o emissions |
| url | http://hdl.handle.net/1721.1/89835 https://orcid.org/0000-0001-5925-3801 https://orcid.org/0000-0003-2233-8945 |
| work_keys_str_mv | AT thompsonrl transcomnsubscript2omodelintercomparisonpart2atmosphericinversionestimatesofnsubscript2oemissions AT ishijimak transcomnsubscript2omodelintercomparisonpart2atmosphericinversionestimatesofnsubscript2oemissions AT corazzam transcomnsubscript2omodelintercomparisonpart2atmosphericinversionestimatesofnsubscript2oemissions AT karstensu transcomnsubscript2omodelintercomparisonpart2atmosphericinversionestimatesofnsubscript2oemissions AT patrapk transcomnsubscript2omodelintercomparisonpart2atmosphericinversionestimatesofnsubscript2oemissions AT bergamaschip transcomnsubscript2omodelintercomparisonpart2atmosphericinversionestimatesofnsubscript2oemissions AT chevallierf transcomnsubscript2omodelintercomparisonpart2atmosphericinversionestimatesofnsubscript2oemissions AT dlugokenckye transcomnsubscript2omodelintercomparisonpart2atmosphericinversionestimatesofnsubscript2oemissions AT weissrf transcomnsubscript2omodelintercomparisonpart2atmosphericinversionestimatesofnsubscript2oemissions AT odohertysimon transcomnsubscript2omodelintercomparisonpart2atmosphericinversionestimatesofnsubscript2oemissions AT fraserpj transcomnsubscript2omodelintercomparisonpart2atmosphericinversionestimatesofnsubscript2oemissions AT steelelp transcomnsubscript2omodelintercomparisonpart2atmosphericinversionestimatesofnsubscript2oemissions AT krummelpb transcomnsubscript2omodelintercomparisonpart2atmosphericinversionestimatesofnsubscript2oemissions AT vermeulena transcomnsubscript2omodelintercomparisonpart2atmosphericinversionestimatesofnsubscript2oemissions AT tohjimay transcomnsubscript2omodelintercomparisonpart2atmosphericinversionestimatesofnsubscript2oemissions AT jordanandres transcomnsubscript2omodelintercomparisonpart2atmosphericinversionestimatesofnsubscript2oemissions AT haszpral transcomnsubscript2omodelintercomparisonpart2atmosphericinversionestimatesofnsubscript2oemissions AT steinbacherm transcomnsubscript2omodelintercomparisonpart2atmosphericinversionestimatesofnsubscript2oemissions AT vanderlaans transcomnsubscript2omodelintercomparisonpart2atmosphericinversionestimatesofnsubscript2oemissions AT aaltot transcomnsubscript2omodelintercomparisonpart2atmosphericinversionestimatesofnsubscript2oemissions AT meinhardtf transcomnsubscript2omodelintercomparisonpart2atmosphericinversionestimatesofnsubscript2oemissions AT popame transcomnsubscript2omodelintercomparisonpart2atmosphericinversionestimatesofnsubscript2oemissions AT moncrieffj transcomnsubscript2omodelintercomparisonpart2atmosphericinversionestimatesofnsubscript2oemissions AT bousquetp transcomnsubscript2omodelintercomparisonpart2atmosphericinversionestimatesofnsubscript2oemissions AT saikawaeri transcomnsubscript2omodelintercomparisonpart2atmosphericinversionestimatesofnsubscript2oemissions AT prinnronaldg transcomnsubscript2omodelintercomparisonpart2atmosphericinversionestimatesofnsubscript2oemissions |