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An investigation of the kinematic and microphysical control of lightning rate, extent and nox production using dc3 observations and the nasa lightning nitrogen oxides model (lnom)
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Carey, Lawrence Bain, Lamont Matthee, Retha Koshak, William Peterson, Harold |
| Copyright Year | 2013 |
| Description | The Deep Convective Clouds and Chemistry (DC3) experiment seeks to quantify the relationship between storm physics, lightning characteristics and the production of nitrogen oxides via lightning (LNOx). The focus of this study is to investigate the kinematic and microphysical control of lightning properties, particularly those that may govern LNOx production, such as flash rate, type and extent across Alabama during DC3. Prior studies have demonstrated that lightning flash rate and type is correlated to kinematic and microphysical properties in the mixedâphase region of thunderstorms such as updraft volume and graupel mass. More study is required to generalize these relationships in a wide variety of storm modes and meteorological conditions. Less is known about the coâevolving relationship between storm physics, morphology and threeâdimensional flash extent, despite its importance for LNOx production. To address this conceptual gap, the NASA Lightning Nitrogen Oxides Model (LNOM) is applied to North Alabama Lightning Mapping Array (NALMA) and Vaisala National Lightning Detection NetworkTM (NLDN) observations following ordinary convective cells through their lifecycle. LNOM provides estimates of flash rate, flash type, channel length distributions, lightning segment altitude distributions (SADs) and lightning NOx production profiles. For this study, LNOM is applied in a Lagrangian sense to multicell thunderstorms over Northern Alabama on two days during DC3 (21 May and 11 June 2012) in which aircraft observations of NOx are available for comparison. The LNOM lightning characteristics and LNOX production estimates are compared to the evolution of updraft and precipitation properties inferred from dualâDoppler and polarimetric radar analyses applied to observations from a nearby radar network, including the UAH Advanced Radar for Meteorological and Operational Research (ARMOR). Given complex multicell evolution, particular attention is paid to storm morphology, cell mergers and possible dynamical, microphysical and electrical interaction of individual cells when testing various hypotheses. |
| File Size | 51482 |
| Page Count | 1 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20140006435 |
| Archival Resource Key | ark:/13960/t22c4131h |
| Language | English |
| Publisher Date | 2013-12-06 |
| Access Restriction | Open |
| Subject Keyword | Meteorology And Climatology Vertical Air Currents Cloud Physics Atmospheric Chemistry Thunderstorms Lightning Kinematics Nitrogen Oxides Radar Tracking Alabama Lagrangian Function Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
