TY - GEN KW - NWP KW - lecture notes AU - Adrian Simmons AB -

The need to control gravity waves in data assimilation and the general concept of initialization are discussed. The basic method of non-linear normal-mode initialization is introduced, and aspects of its implementation in models are presented, covering the vertical and horizontal modal decomposition, implicit initialization and diabatic initialization. The control of gravity waves in the ECMWF variational data assimilation system is described. An introduction to the alternative method of digital filtering is also given.

Contents

 

  1. Introduction
  2. Non-linear normal-mode initialization
  3. Control of gravity waves in the ECMWF variational data assimilation
  4. Digital filtering
  5. Appendix
  6. References

 

BT - Meteorological Training Course Lecture Series C1 - Learning DA - 2002 LA - eng N2 -

The need to control gravity waves in data assimilation and the general concept of initialization are discussed. The basic method of non-linear normal-mode initialization is introduced, and aspects of its implementation in models are presented, covering the vertical and horizontal modal decomposition, implicit initialization and diabatic initialization. The control of gravity waves in the ECMWF variational data assimilation system is described. An introduction to the alternative method of digital filtering is also given.

Contents

 

  1. Introduction
  2. Non-linear normal-mode initialization
  3. Control of gravity waves in the ECMWF variational data assimilation
  4. Digital filtering
  5. Appendix
  6. References

 

PB - ECMWF PY - 2002 T2 - Meteorological Training Course Lecture Series TI - The control of gravity waves in data assimilation ER -