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Excitation of the primary tropospheric chemical mode in a global three-dimensional model

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Excitation of the primary tropospheric chemical mode in a global three-dimensional model. / Wild, O ; Prather, M J .
In: Journal of Geophysical Research: Atmospheres, Vol. 105, No. D20, 27.10.2000, p. 24647-24660.

Research output: Contribution to Journal/MagazineJournal articlepeer-review

Harvard

Wild, O & Prather, MJ 2000, 'Excitation of the primary tropospheric chemical mode in a global three-dimensional model', Journal of Geophysical Research: Atmospheres, vol. 105, no. D20, pp. 24647-24660. https://doi.org/10.1029/2000JD900399

APA

Wild, O., & Prather, M. J. (2000). Excitation of the primary tropospheric chemical mode in a global three-dimensional model. Journal of Geophysical Research: Atmospheres, 105(D20), 24647-24660. https://doi.org/10.1029/2000JD900399

Vancouver

Wild O, Prather MJ. Excitation of the primary tropospheric chemical mode in a global three-dimensional model. Journal of Geophysical Research: Atmospheres. 2000 Oct 27;105(D20):24647-24660. doi: 10.1029/2000JD900399

Author

Wild, O ; Prather, M J . / Excitation of the primary tropospheric chemical mode in a global three-dimensional model. In: Journal of Geophysical Research: Atmospheres. 2000 ; Vol. 105, No. D20. pp. 24647-24660.

Bibtex

@article{fabffc8f4f6e4919b362f810b6a72023,
title = "Excitation of the primary tropospheric chemical mode in a global three-dimensional model",
abstract = "Coupling of local chemical processes over the globe by atmospheric transport leads to the existence of chemical modes that are a fundamental characterization of global atmospheric chemistry and provide a true description of the atmospheric response to small changes in trace-gas emissions. Such coupled chemistry-transport modes in global tropospheric chemistry are an inherent feature of three-dimensional chemical transport models (CTMs). In CTMs these modes cannot be solved for explicitly, as they have been for the case of low-order, fully linearized systems, but they are investigated here through a series of perturbation experiments. When using meteorological fields that recycle every year, the long-lived modes are readily seen as seasonal decay patterns that e-fold each year. An important application of chemical modes is the study of how emissions of CO and NO excite perturbations to the CH4-like mode, the longest-lived (primary) mode found in tropospheric chemistry (i,e., with fixed stratospheric composition). Perturbation experiments are conducted with the University of California, Irvine, three-dimensional tropospheric CTM to identify this primary tropospheric mode and to determine its five-dimensional structure. The previous demonstrations of a long-lived chemical mode with 1.5 times the lifetime of CH4 are corroborated. The ability of emissions of CO and NO to excite this mode is then demonstrated, and a quantitative evaluation of the indirect effect of CO emissions on the greenhouse gases CH4 and tropospheric O-3 is made, showing that 100 kg of CO is equivalent to 5-6 kg of CH4 emissions.",
keywords = "OBSERVATORY PHOTOCHEMISTRY EXPERIMENT, ORGANIC-COMPOUND EMISSIONS, ATMOSPHERIC CHEMISTRY, CARBON-MONOXIDE, DIAGNOSTIC-TOOL, ONLINE TRACERS, TIME SCALES, TRANSPORT, OZONE, O-3",
author = "O Wild and Prather, {M J}",
year = "2000",
month = oct,
day = "27",
doi = "10.1029/2000JD900399",
language = "English",
volume = "105",
pages = "24647--24660",
journal = "Journal of Geophysical Research: Atmospheres",
issn = "0747-7309",
publisher = "Wiley-Blackwell Publishing Ltd",
number = "D20",

}

RIS

TY - JOUR

T1 - Excitation of the primary tropospheric chemical mode in a global three-dimensional model

AU - Wild, O

AU - Prather, M J

PY - 2000/10/27

Y1 - 2000/10/27

N2 - Coupling of local chemical processes over the globe by atmospheric transport leads to the existence of chemical modes that are a fundamental characterization of global atmospheric chemistry and provide a true description of the atmospheric response to small changes in trace-gas emissions. Such coupled chemistry-transport modes in global tropospheric chemistry are an inherent feature of three-dimensional chemical transport models (CTMs). In CTMs these modes cannot be solved for explicitly, as they have been for the case of low-order, fully linearized systems, but they are investigated here through a series of perturbation experiments. When using meteorological fields that recycle every year, the long-lived modes are readily seen as seasonal decay patterns that e-fold each year. An important application of chemical modes is the study of how emissions of CO and NO excite perturbations to the CH4-like mode, the longest-lived (primary) mode found in tropospheric chemistry (i,e., with fixed stratospheric composition). Perturbation experiments are conducted with the University of California, Irvine, three-dimensional tropospheric CTM to identify this primary tropospheric mode and to determine its five-dimensional structure. The previous demonstrations of a long-lived chemical mode with 1.5 times the lifetime of CH4 are corroborated. The ability of emissions of CO and NO to excite this mode is then demonstrated, and a quantitative evaluation of the indirect effect of CO emissions on the greenhouse gases CH4 and tropospheric O-3 is made, showing that 100 kg of CO is equivalent to 5-6 kg of CH4 emissions.

AB - Coupling of local chemical processes over the globe by atmospheric transport leads to the existence of chemical modes that are a fundamental characterization of global atmospheric chemistry and provide a true description of the atmospheric response to small changes in trace-gas emissions. Such coupled chemistry-transport modes in global tropospheric chemistry are an inherent feature of three-dimensional chemical transport models (CTMs). In CTMs these modes cannot be solved for explicitly, as they have been for the case of low-order, fully linearized systems, but they are investigated here through a series of perturbation experiments. When using meteorological fields that recycle every year, the long-lived modes are readily seen as seasonal decay patterns that e-fold each year. An important application of chemical modes is the study of how emissions of CO and NO excite perturbations to the CH4-like mode, the longest-lived (primary) mode found in tropospheric chemistry (i,e., with fixed stratospheric composition). Perturbation experiments are conducted with the University of California, Irvine, three-dimensional tropospheric CTM to identify this primary tropospheric mode and to determine its five-dimensional structure. The previous demonstrations of a long-lived chemical mode with 1.5 times the lifetime of CH4 are corroborated. The ability of emissions of CO and NO to excite this mode is then demonstrated, and a quantitative evaluation of the indirect effect of CO emissions on the greenhouse gases CH4 and tropospheric O-3 is made, showing that 100 kg of CO is equivalent to 5-6 kg of CH4 emissions.

KW - OBSERVATORY PHOTOCHEMISTRY EXPERIMENT

KW - ORGANIC-COMPOUND EMISSIONS

KW - ATMOSPHERIC CHEMISTRY

KW - CARBON-MONOXIDE

KW - DIAGNOSTIC-TOOL

KW - ONLINE TRACERS

KW - TIME SCALES

KW - TRANSPORT

KW - OZONE

KW - O-3

U2 - 10.1029/2000JD900399

DO - 10.1029/2000JD900399

M3 - Journal article

VL - 105

SP - 24647

EP - 24660

JO - Journal of Geophysical Research: Atmospheres

JF - Journal of Geophysical Research: Atmospheres

SN - 0747-7309

IS - D20

ER -