Retrieval of eddy dissipation rate from derived equivalent vertical gust included in Aircraft Meteorological Data Relay (AMDAR)
| Autor: | Hye-Yeong Chun, Jung-Hoon Kim, Matt Strahan, Soohyun Kim, Robert Sharman |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
020301 aerospace & aeronautics
Atmospheric Science 010504 meteorology & atmospheric sciences Meteorology Aviation business.industry Turbulence lcsh:TA715-787 lcsh:Earthwork. Foundations Civil aviation 02 engineering and technology Dissipation 01 natural sciences lcsh:Environmental engineering 0203 mechanical engineering Metric (mathematics) Log-normal distribution Aircraft Meteorological Data Relay Environmental science lcsh:TA170-171 business 0105 earth and related environmental sciences Cube root |
| Zdroj: | Atmospheric Measurement Techniques, Vol 13, Pp 1373-1385 (2020) |
| ISSN: | 1867-8548 1867-1381 |
| Popis: | Some of the Aircraft Meteorological Data Relay (AMDAR) data include a turbulence metric of the derived equivalent vertical gust (DEVG), in addition to wind and temperature. As the cube root of the eddy dissipation rate (EDR) is the International Civil Aviation Organization standard turbulence reporting metric, we attempt to retrieve the EDR from the DEVG for more reliable and consistent observations of aviation turbulence globally. Using the DEVG in the AMDAR archived from October 2015 to September 2018 covering a large portion of the Southern Hemisphere and North Pacific and North Atlantic Oceans, we convert the DEVG to the EDR using two methods, after conducting quality control procedures to remove suspicious turbulence reports in the DEVG. The first method is to remap the DEVG to the EDR using a lognormal mapping scheme, while the second one is using the best-fit curve between the EDR and DEVG developed in the previous study. The DEVG-derived EDRs obtained from the two methods are evaluated against in situ EDR data reported by United States-operated carriers. For two specified regions of the trans-Pacific Ocean and Europe, where both the DEVG-derived EDRs and in situ EDRs were available, the DEVG-derived EDRs obtained by the two methods are generally consistent with in situ EDRs, with slightly better statistics by the first method than the second one. This result is encouraging for extending the aviation turbulence data globally with the single preferred EDR metric, which will contribute to the improvement of global aviation turbulence forecasting as well as to the construction of the climatology of upper-level turbulence. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
| Nepřihlášeným uživatelům se plný text nezobrazuje | K zobrazení výsledku je třeba se přihlásit. |