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Letters to the Editor

Comments on ‘‘Tangent linear and adjoint of ‘on–off’ processes and their feasibility for use in 4-dimensional variational data assimilation’’

Pages 653-656 | Received 28 Jul 1997, Accepted 22 Jun 1998, Published online: 15 Dec 2016

References

  • Courant, R. and D. Hilbert, 1962. Methods of mathematical physics, vol. II. Interscience Pub!., 830 pp.
  • Xu, Q. 1996a. Generalized adjoint for physical processes with parameterized discontinuities. Part I. Basic issues and heuristic examples. J. Atmos. Sc i. 53, 1123–1142.
  • Xu, Q. 1996b. Generalized adjoint for physical processes with parameterized discontinuities. Part II. Vector formulations and matching conditions. J. Atmos. Sc i. 53, 1143–1155.
  • Xu, Q. 1997. Generalized adjoint for physical processes with parameterized discontinuities. Part IV. Problems and treatment in time discretization. J. Atmos. Sc i. 54, 2722–2728.
  • Xu, Q., J. Gao, and W. Gu, 1998. Generalized adjoint for physical processes with parameterized discontinuities. Part V. Coarse-grain adjoint and problems in gradient check. J. Atmos. Sc i. 55, 2130–2135.
  • Zou, X. 1997. Tangent linear and adjoint of “on—off” processes and their feasibility for use in 4-dimensional variational data assimilation. Tellus 49A, 3–31.