原文传递
Aircraft NO(x) had no Unique Fingerprint on Sonex; Lightning Dominated Fresh NO(x) Sources
| 题名： | Aircraft NO(x) had no Unique Fingerprint on Sonex; Lightning Dominated Fresh NO(x) Sources |
| 作者： | Thompson, A.; Sparling, L.; Kondo, Y.; Anderson, B.; Gregory, G.; Sachse, G. |
| 关键词： | fingerprint；lightning；fresh；source；craft；mina；distribution；well-defined；signature；racer |
| 摘要： | Key questions to which SONEX was directed were the following: Can aircraft corridors be detected Is there a unique tracer for aircraft NO(x) Can a "background" NO(x) (or NO(y) be defined What fraction of NO(x) measured during SONEX was from aircraft How representative was SONEX of the North Atlantic in 1997 and how typical of other years We attempt to answer these questions through species-species correlations, probability distribution functions (PDFs), and meteorological history. There is not a unique aircraft tracer, largely due to the high variability of air mass origins and tracer ratios, which render "average" quantities meaningless. The greatest NO and NO(y) signals were associated with lightning and convective NO sources. Well-defined background CO, NO(y) and NO(y)/ozone ratio appear in subsets of two cross-track flights with subtropical origins and five flights with predominantly mid-latitude air. Forty percent of the observations on these 7 flights showed NO(y)/ozone to be above background, evidently due to unreacted NO(x). This NO(x) is a combination of aircraft, lightning and surface pollution injected by convection. The strongly subtropical signatures in SONEX observations, confirmed by pv (potential vorticity) values along flight tracks, argues for most of the unreacted NO(x) originating from lightning. Potential vorticity statistics along SONEX flight tracks in 1992-1998, and for the North Atlantic as a whole, show the SONEX meteorological environment to be representative of the North Atlantic flight corridor in the October-November period. |
| 报告类型： | 科技报告 |
相关文献
- Fiber-Optic Current Sensor for Lightning Measurement Applications.
- Development of Calcined Clays as Pozzolanic Additions in Portland Cement Concrete Mixtures.
- Concrete Pavement Mixture Design and Analysis (MDA): Development and Evaluation of Vibrating Kelly Ball Test (VKelly Test) for the Workability of Concrete.
- FD-TD numerical simulation of an entire lightning strike on the C160 aircraft
- Unique features and capabilities of the NADS motion system.
- Design and On-Orbit Operation of the Adiabatic Demagnetization Refrigerator on the Hitomi Soft X-Ray Spectrometer Instrument [STUB].
检索历史
应用推荐
