Rights statement: Copyright 2003 by the American Geophysical Union
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Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - An intercomparison and evaluation of aircraft-derived and simulated CO from seven chemical transport models during the TRACE-P experiment
AU - Kiley, C M
AU - Fuelberg, H E
AU - Palmer, P I
AU - Allen, D J
AU - Carmichael, G R
AU - Jacob, D J
AU - Mari, C
AU - Pierce, R B
AU - Pickering, K E
AU - Tang, Y H
AU - Wild, O
AU - Fairlie, T D
AU - Logan, J A
AU - Sachse, G W
AU - Shaack, T K
AU - Streets, D G
PY - 2003/11/15
Y1 - 2003/11/15
N2 - Four global scale and three regional scale chemical transport models are intercompared and evaluated during NASA's Transport and Chemical Evolution over the Pacific (TRACE-P) experiment. Model simulated and measured CO are statistically analyzed along aircraft flight tracks. Results for the combination of 11 flights show an overall negative bias in simulated CO. Biases are most pronounced during large CO events. Statistical agreements vary greatly among the individual flights. Those flights with the greatest range of CO values tend to be the worst simulated. However, for each given flight, the models generally provide similar relative results. The models exhibit difficulties simulating intense CO plumes. CO error is found to be greatest in the lower troposphere. Convective mass flux is shown to be very important, particularly near emissions source regions. Occasionally meteorological lift associated with excessive model-calculated mass fluxes leads to an overestimation of middle and upper tropospheric mixing ratios. Planetary Boundary Layer (PBL) depth is found to play an important role in simulating intense CO plumes. PBL depth is shown to cap plumes, confining heavy pollution to the very lowest levels.
AB - Four global scale and three regional scale chemical transport models are intercompared and evaluated during NASA's Transport and Chemical Evolution over the Pacific (TRACE-P) experiment. Model simulated and measured CO are statistically analyzed along aircraft flight tracks. Results for the combination of 11 flights show an overall negative bias in simulated CO. Biases are most pronounced during large CO events. Statistical agreements vary greatly among the individual flights. Those flights with the greatest range of CO values tend to be the worst simulated. However, for each given flight, the models generally provide similar relative results. The models exhibit difficulties simulating intense CO plumes. CO error is found to be greatest in the lower troposphere. Convective mass flux is shown to be very important, particularly near emissions source regions. Occasionally meteorological lift associated with excessive model-calculated mass fluxes leads to an overestimation of middle and upper tropospheric mixing ratios. Planetary Boundary Layer (PBL) depth is found to play an important role in simulating intense CO plumes. PBL depth is shown to cap plumes, confining heavy pollution to the very lowest levels.
KW - GENERAL-CIRCULATION MODEL
KW - TROPICAL SOUTH ATLANTIC
KW - ISENTROPIC-SIGMA MODEL
KW - ATMOSPHERIC CHEMISTRY
KW - DEPOSITION
KW - OZONE
KW - ASIA
KW - EMISSIONS
KW - AEROSOLS
KW - BIOMASS
U2 - 10.1029/2002JD003089
DO - 10.1029/2002JD003089
M3 - Journal article
VL - 108
SP - -
JO - Journal of Geophysical Research: Atmospheres
JF - Journal of Geophysical Research: Atmospheres
SN - 0747-7309
IS - D21
M1 - 8819
ER -