| タイトル | Lifetimes and eigenstates in atmospheric chemistry |
| 著者（英） | Prather, Michael J. |
| 著者所属（英） | NASA Headquarters |
| 発行日 | 1994-05-01 |
| 言語 | eng |
| 内容記述 | The time scales and mode of the atmosphere's response to chemical perturbations are defined by the eigenvalues and eigenvectors of the system. The eigenstates of a simplified one-box CH4-CO-OH system are analyzed. The longest time constant (smallest eigenvalue) always exceeds the lifetime defined by the steady-state loss frequency for CH4, the longest lived gas. Thus, the extent of a CH4 perturbation -- the methane response time -- is always longer than predicted by the steady-state lifetime and is independent of size of the perturbation in the linear limit. This lengthening of the atmospheric recovery time can be diagnosed by how close we are to a chemically unstable troposphere, i.e., how much OH production exceeds that minimum needed to oxidize just the global emissions of CH4, CO, and other hydrocarbons and species. |
| NASA分類 | ENVIRONMENT POLLUTION |
| レポートNO | 95A66874 |
| 権利 | Copyright |
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