MPAS | Eddy dissipation rate (EDR)

NWP | Eddy Dissipation Rate (EDR)

Analysis and Simulations for the Severe Turbulence Event Aloft Myanmar on 21 May 2024.

Leung, Christy Yan Yu, et al. "Analysis and Simulations for the Severe Turbulence Event Aloft Myanmar on 21 May 2024." Meteorological Applications 32.3 (2025): e70058.
- HKO
- https://rmets.onlinelibrary.wiley.com/doi/epdf/10.1002/met.70058
- MPAS-A
  - 60-3km
- Deep Learning Model for Detection of Turbulence From AGW Features
- Seamless Blended Significant Convection Forecast

Tropical Aviation Turbulence Induced by the Interaction Between a Jet Stream and Deep Convection

Chen, H., Leung, C. Y. Y., Cheung, P., Liu, H., Chan, S. T., & Shi, X. (2025). Predicting Convectively Induced Turbulence With Regionally Convection-Permitting Simulations. Asia-Pacific Journal of Atmospheric Sciences, 61(2), 16.
- MPAS-A v7
  - We developed a method to estimate the eddy dissipation rate (EDR) using the resolved wind field of the MPAS simulations. (3D field)
  - The Graphical Turbulence Guidance (GTG) systemis indeed a multi-diagnostic algorithm developed by the National Center for Atmospheric Research (NCAR). It is primarily run on data from the National Centers for Environmental Prediction (NCEP), which is a division of the National Weather Service (NWS).
    - Within global aviation, the NWS operates the Washingt on World Area Forecast Center (WAFC), which is a vital part of the World Area Forecast System (WAFS).
    - https://www.icao.int/sites/default/files/WACAF/MeetingDocs/2025/New%20SADIS%20API/2-WAFS-Gridded-Data.pdf
      - ICAO Annex 3 - Meteorological Service for International Air Navigation, Appendix 4has the following information:
        
        Turbulence shall be considered:
        
        Severe when the peak value of EDR equals or exceeds 0.45;
        
        moderate when the peak value is equal to or above 0.20 and below 0.45;
        
        Light when the peak value is above 0.10 and below 0.20; and
        
        nil when the peak value is below or equal to 0.10.
  - At higher altitudes, although the area with a minimum Richardson number of less than 0.25 is relatively small, it still triggers severe turbulence due to wave breakings.
  - Spatial distributions of the EDR calculated with different methods at 10 km altitude,