A regional scale modeling analysis of aerosol and trace gas distributions over the eastern Pacific during the INTEX-B field campaign

B. Adhikary, G. R. Carmichael, S. Kulkarni, C. Wei, Y. Tang, A. D'Allura, M. Mena-Carrasco, D. G. Streets, Q. Zhang, R. B. Pierce, J. A. Al-Saadi, L. K. Emmons, G. G. Pfister, M. A. Avery, J. D. Barrick, D. R. Blake, W. H. Brune, R. C. Cohen, J. E. Dibb, A. FriedB. G. Heikes, L. G. Huey, D. W. O'Sullivan, G. W. Sachse, R. E. Shetter, H. B. Singh, T. L. Campos, C. A. Cantrell, F. M. Flocke, E. J. Dunlea, J. L. Jimenez, A. J. Weinheimer, J. D. Crounse, P. O. Wennberg, J. J. Schauer, E. A. Stone, D. A. Jaffe, D. R. Reidmiller

Resultado de la investigación: Article

29 Citas (Scopus)

Resumen

The Sulfur Transport and dEposition Model (STEM) is applied to the analysis of observations obtained during the Intercontinental Chemical Transport Experiment-Phase B (INTEX-B), conducted over the eastern Pacific Ocean during spring 2006. Predicted trace gas and aerosol distributions over the Pacific are presented and discussed in terms of transport and source region contributions. Trace species distributions show a strong west (high) to east (low) gradient, with the bulk of the pollutant transport over the central Pacific occurring between ∼20° N and 50° N in the 2-6 km altitude range. These distributions are evaluated in the eastern Pacific by comparison with the NASA DC-8 and NSF/NCAR C-130 airborne measurements along with observations from the Mt. Bachelor (MBO) surface site. Thirty different meteorological, trace gas and aerosol parameters are compared. In general the meteorological fields are better predicted than gas phase species, which in turn are better predicted than aerosol quantities. PAN is found to be significantly overpredicted over the eastern Pacific, which is attributed to uncertainties in the chemical reaction mechanisms used in current atmospheric chemistry models in general and to the specifically high PAN production in the SAPRC-99 mechanism used in the regional model. A systematic underprediction of the elevated sulfate layer in the eastern Pacific observed by the C-130 is another issue that is identified and discussed. Results from source region tagged CO simulations are used to estimate how the different source regions around the Pacific contribute to the trace gas species distributions. During this period the largest contributions were from China and from fires in South/Southeast and North Asia. For the C-130 flights, which operated off the coast of the Northwest US, the regional CO contributions range as follows: China (35%), South/Southeast Asia fires (35%), North America anthropogenic (20%), and North Asia fires (10%). The transport of pollution into the western US is studied at MBO and a variety of events with elevated Asian dust, and periods with contributions from China and fires from both Asia and North America are discussed. The role of heterogeneous chemistry on the composition over the eastern Pacific is also studied. The impacts of heterogeneous reactions at specific times can be significant, increasing sulfate and nitrate aerosol production and reducing gas phase nitric acid levels appreciably (∼50%).

Idioma originalEnglish
Páginas (desde-hasta)2091-2115
Número de páginas25
PublicaciónAtmospheric Chemistry and Physics
Volumen10
N.º5
EstadoPublished - 2010

Huella dactilar

trace gas
aerosol
modeling
experiment
sulfate
atmospheric chemistry
pollutant transport
nitric acid
gas
chemical reaction
flight
sulfur
nitrate
dust
pollution
distribution
chemical
analysis
coast
ocean

ASJC Scopus subject areas

  • Atmospheric Science

Citar esto

Adhikary, B., Carmichael, G. R., Kulkarni, S., Wei, C., Tang, Y., D'Allura, A., ... Reidmiller, D. R. (2010). A regional scale modeling analysis of aerosol and trace gas distributions over the eastern Pacific during the INTEX-B field campaign. Atmospheric Chemistry and Physics, 10(5), 2091-2115.
Adhikary, B. ; Carmichael, G. R. ; Kulkarni, S. ; Wei, C. ; Tang, Y. ; D'Allura, A. ; Mena-Carrasco, M. ; Streets, D. G. ; Zhang, Q. ; Pierce, R. B. ; Al-Saadi, J. A. ; Emmons, L. K. ; Pfister, G. G. ; Avery, M. A. ; Barrick, J. D. ; Blake, D. R. ; Brune, W. H. ; Cohen, R. C. ; Dibb, J. E. ; Fried, A. ; Heikes, B. G. ; Huey, L. G. ; O'Sullivan, D. W. ; Sachse, G. W. ; Shetter, R. E. ; Singh, H. B. ; Campos, T. L. ; Cantrell, C. A. ; Flocke, F. M. ; Dunlea, E. J. ; Jimenez, J. L. ; Weinheimer, A. J. ; Crounse, J. D. ; Wennberg, P. O. ; Schauer, J. J. ; Stone, E. A. ; Jaffe, D. A. ; Reidmiller, D. R. / A regional scale modeling analysis of aerosol and trace gas distributions over the eastern Pacific during the INTEX-B field campaign. En: Atmospheric Chemistry and Physics. 2010 ; Vol. 10, N.º 5. pp. 2091-2115.
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title = "A regional scale modeling analysis of aerosol and trace gas distributions over the eastern Pacific during the INTEX-B field campaign",
abstract = "The Sulfur Transport and dEposition Model (STEM) is applied to the analysis of observations obtained during the Intercontinental Chemical Transport Experiment-Phase B (INTEX-B), conducted over the eastern Pacific Ocean during spring 2006. Predicted trace gas and aerosol distributions over the Pacific are presented and discussed in terms of transport and source region contributions. Trace species distributions show a strong west (high) to east (low) gradient, with the bulk of the pollutant transport over the central Pacific occurring between ∼20° N and 50° N in the 2-6 km altitude range. These distributions are evaluated in the eastern Pacific by comparison with the NASA DC-8 and NSF/NCAR C-130 airborne measurements along with observations from the Mt. Bachelor (MBO) surface site. Thirty different meteorological, trace gas and aerosol parameters are compared. In general the meteorological fields are better predicted than gas phase species, which in turn are better predicted than aerosol quantities. PAN is found to be significantly overpredicted over the eastern Pacific, which is attributed to uncertainties in the chemical reaction mechanisms used in current atmospheric chemistry models in general and to the specifically high PAN production in the SAPRC-99 mechanism used in the regional model. A systematic underprediction of the elevated sulfate layer in the eastern Pacific observed by the C-130 is another issue that is identified and discussed. Results from source region tagged CO simulations are used to estimate how the different source regions around the Pacific contribute to the trace gas species distributions. During this period the largest contributions were from China and from fires in South/Southeast and North Asia. For the C-130 flights, which operated off the coast of the Northwest US, the regional CO contributions range as follows: China (35{\%}), South/Southeast Asia fires (35{\%}), North America anthropogenic (20{\%}), and North Asia fires (10{\%}). The transport of pollution into the western US is studied at MBO and a variety of events with elevated Asian dust, and periods with contributions from China and fires from both Asia and North America are discussed. The role of heterogeneous chemistry on the composition over the eastern Pacific is also studied. The impacts of heterogeneous reactions at specific times can be significant, increasing sulfate and nitrate aerosol production and reducing gas phase nitric acid levels appreciably (∼50{\%}).",
author = "B. Adhikary and Carmichael, {G. R.} and S. Kulkarni and C. Wei and Y. Tang and A. D'Allura and M. Mena-Carrasco and Streets, {D. G.} and Q. Zhang and Pierce, {R. B.} and Al-Saadi, {J. A.} and Emmons, {L. K.} and Pfister, {G. G.} and Avery, {M. A.} and Barrick, {J. D.} and Blake, {D. R.} and Brune, {W. H.} and Cohen, {R. C.} and Dibb, {J. E.} and A. Fried and Heikes, {B. G.} and Huey, {L. G.} and O'Sullivan, {D. W.} and Sachse, {G. W.} and Shetter, {R. E.} and Singh, {H. B.} and Campos, {T. L.} and Cantrell, {C. A.} and Flocke, {F. M.} and Dunlea, {E. J.} and Jimenez, {J. L.} and Weinheimer, {A. J.} and Crounse, {J. D.} and Wennberg, {P. O.} and Schauer, {J. J.} and Stone, {E. A.} and Jaffe, {D. A.} and Reidmiller, {D. R.}",
year = "2010",
language = "English",
volume = "10",
pages = "2091--2115",
journal = "Atmospheric Chemistry and Physics",
issn = "1680-7316",
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Adhikary, B, Carmichael, GR, Kulkarni, S, Wei, C, Tang, Y, D'Allura, A, Mena-Carrasco, M, Streets, DG, Zhang, Q, Pierce, RB, Al-Saadi, JA, Emmons, LK, Pfister, GG, Avery, MA, Barrick, JD, Blake, DR, Brune, WH, Cohen, RC, Dibb, JE, Fried, A, Heikes, BG, Huey, LG, O'Sullivan, DW, Sachse, GW, Shetter, RE, Singh, HB, Campos, TL, Cantrell, CA, Flocke, FM, Dunlea, EJ, Jimenez, JL, Weinheimer, AJ, Crounse, JD, Wennberg, PO, Schauer, JJ, Stone, EA, Jaffe, DA & Reidmiller, DR 2010, 'A regional scale modeling analysis of aerosol and trace gas distributions over the eastern Pacific during the INTEX-B field campaign', Atmospheric Chemistry and Physics, vol. 10, n.º 5, pp. 2091-2115.

A regional scale modeling analysis of aerosol and trace gas distributions over the eastern Pacific during the INTEX-B field campaign. / Adhikary, B.; Carmichael, G. R.; Kulkarni, S.; Wei, C.; Tang, Y.; D'Allura, A.; Mena-Carrasco, M.; Streets, D. G.; Zhang, Q.; Pierce, R. B.; Al-Saadi, J. A.; Emmons, L. K.; Pfister, G. G.; Avery, M. A.; Barrick, J. D.; Blake, D. R.; Brune, W. H.; Cohen, R. C.; Dibb, J. E.; Fried, A.; Heikes, B. G.; Huey, L. G.; O'Sullivan, D. W.; Sachse, G. W.; Shetter, R. E.; Singh, H. B.; Campos, T. L.; Cantrell, C. A.; Flocke, F. M.; Dunlea, E. J.; Jimenez, J. L.; Weinheimer, A. J.; Crounse, J. D.; Wennberg, P. O.; Schauer, J. J.; Stone, E. A.; Jaffe, D. A.; Reidmiller, D. R.

En: Atmospheric Chemistry and Physics, Vol. 10, N.º 5, 2010, p. 2091-2115.

Resultado de la investigación: Article

TY - JOUR

T1 - A regional scale modeling analysis of aerosol and trace gas distributions over the eastern Pacific during the INTEX-B field campaign

AU - Adhikary, B.

AU - Carmichael, G. R.

AU - Kulkarni, S.

AU - Wei, C.

AU - Tang, Y.

AU - D'Allura, A.

AU - Mena-Carrasco, M.

AU - Streets, D. G.

AU - Zhang, Q.

AU - Pierce, R. B.

AU - Al-Saadi, J. A.

AU - Emmons, L. K.

AU - Pfister, G. G.

AU - Avery, M. A.

AU - Barrick, J. D.

AU - Blake, D. R.

AU - Brune, W. H.

AU - Cohen, R. C.

AU - Dibb, J. E.

AU - Fried, A.

AU - Heikes, B. G.

AU - Huey, L. G.

AU - O'Sullivan, D. W.

AU - Sachse, G. W.

AU - Shetter, R. E.

AU - Singh, H. B.

AU - Campos, T. L.

AU - Cantrell, C. A.

AU - Flocke, F. M.

AU - Dunlea, E. J.

AU - Jimenez, J. L.

AU - Weinheimer, A. J.

AU - Crounse, J. D.

AU - Wennberg, P. O.

AU - Schauer, J. J.

AU - Stone, E. A.

AU - Jaffe, D. A.

AU - Reidmiller, D. R.

PY - 2010

Y1 - 2010

N2 - The Sulfur Transport and dEposition Model (STEM) is applied to the analysis of observations obtained during the Intercontinental Chemical Transport Experiment-Phase B (INTEX-B), conducted over the eastern Pacific Ocean during spring 2006. Predicted trace gas and aerosol distributions over the Pacific are presented and discussed in terms of transport and source region contributions. Trace species distributions show a strong west (high) to east (low) gradient, with the bulk of the pollutant transport over the central Pacific occurring between ∼20° N and 50° N in the 2-6 km altitude range. These distributions are evaluated in the eastern Pacific by comparison with the NASA DC-8 and NSF/NCAR C-130 airborne measurements along with observations from the Mt. Bachelor (MBO) surface site. Thirty different meteorological, trace gas and aerosol parameters are compared. In general the meteorological fields are better predicted than gas phase species, which in turn are better predicted than aerosol quantities. PAN is found to be significantly overpredicted over the eastern Pacific, which is attributed to uncertainties in the chemical reaction mechanisms used in current atmospheric chemistry models in general and to the specifically high PAN production in the SAPRC-99 mechanism used in the regional model. A systematic underprediction of the elevated sulfate layer in the eastern Pacific observed by the C-130 is another issue that is identified and discussed. Results from source region tagged CO simulations are used to estimate how the different source regions around the Pacific contribute to the trace gas species distributions. During this period the largest contributions were from China and from fires in South/Southeast and North Asia. For the C-130 flights, which operated off the coast of the Northwest US, the regional CO contributions range as follows: China (35%), South/Southeast Asia fires (35%), North America anthropogenic (20%), and North Asia fires (10%). The transport of pollution into the western US is studied at MBO and a variety of events with elevated Asian dust, and periods with contributions from China and fires from both Asia and North America are discussed. The role of heterogeneous chemistry on the composition over the eastern Pacific is also studied. The impacts of heterogeneous reactions at specific times can be significant, increasing sulfate and nitrate aerosol production and reducing gas phase nitric acid levels appreciably (∼50%).

AB - The Sulfur Transport and dEposition Model (STEM) is applied to the analysis of observations obtained during the Intercontinental Chemical Transport Experiment-Phase B (INTEX-B), conducted over the eastern Pacific Ocean during spring 2006. Predicted trace gas and aerosol distributions over the Pacific are presented and discussed in terms of transport and source region contributions. Trace species distributions show a strong west (high) to east (low) gradient, with the bulk of the pollutant transport over the central Pacific occurring between ∼20° N and 50° N in the 2-6 km altitude range. These distributions are evaluated in the eastern Pacific by comparison with the NASA DC-8 and NSF/NCAR C-130 airborne measurements along with observations from the Mt. Bachelor (MBO) surface site. Thirty different meteorological, trace gas and aerosol parameters are compared. In general the meteorological fields are better predicted than gas phase species, which in turn are better predicted than aerosol quantities. PAN is found to be significantly overpredicted over the eastern Pacific, which is attributed to uncertainties in the chemical reaction mechanisms used in current atmospheric chemistry models in general and to the specifically high PAN production in the SAPRC-99 mechanism used in the regional model. A systematic underprediction of the elevated sulfate layer in the eastern Pacific observed by the C-130 is another issue that is identified and discussed. Results from source region tagged CO simulations are used to estimate how the different source regions around the Pacific contribute to the trace gas species distributions. During this period the largest contributions were from China and from fires in South/Southeast and North Asia. For the C-130 flights, which operated off the coast of the Northwest US, the regional CO contributions range as follows: China (35%), South/Southeast Asia fires (35%), North America anthropogenic (20%), and North Asia fires (10%). The transport of pollution into the western US is studied at MBO and a variety of events with elevated Asian dust, and periods with contributions from China and fires from both Asia and North America are discussed. The role of heterogeneous chemistry on the composition over the eastern Pacific is also studied. The impacts of heterogeneous reactions at specific times can be significant, increasing sulfate and nitrate aerosol production and reducing gas phase nitric acid levels appreciably (∼50%).

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AN - SCOPUS:77649218918

VL - 10

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JO - Atmospheric Chemistry and Physics

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SN - 1680-7316

IS - 5

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