GSI Documents and Publications

GSI User's Guide

  • GSI version 3.3
    • User's Guide [pdf]
    • Advanced User's Guide [pdf,v3.3.0.2]
  • GSI version 3.2 comprehensive user documentation [pdf]
  • GSI version 3.1 comprehensive user documentation [pdf]
  • GSI version 3.0 comprehensive user documentation [pdf]; [ps]
  • GSI version 2.0 comprehensive user documentation [pdf]
  • GSI version 1.0 comprehensive user documentation [pdf]

DTC Community GSI Workshop Presentations

DTC Community GSI Tutorial Presentations

GSI Technique doumentation

  • Introduction to Radar Data Interface to GSI [pdf]
  • Technical Report on the Development of the GSI-based WRF 4DVAR by Xin Zhang & Xiang-Yu Huang [pdf]
  • Generation of WRF-AW Background Errors (BE) for GSI: by Syed RH Rizvi, Zhiquan Liu & Xiang-Yu Huang [pdf]

GSI Presentations

  • Summer 2009 WRF-DA Tutorial (20-22 July, 2009) [ppt]
  • WRF Workshop 2009, instructional session (June 26, 2009) [pdf]

GSI Code Browser (converted using F90toHTML)

The following versions of Boulder Community GSI Code are available:

Publications

  • Wan-Shu Wu, R. James Purser, and David F. Parrish, 2002: Three-Dimensional Variational Analysis with Spatially Inhomogeneous Covariances. Monthly Weather Review, 130, 2905-2916.
  • James Purser, Wan-Shu Wu, David F. Parrish, and Nigel M. Roberts, 2003: Numerical Aspects of the Application of Recursive Filters to Variational Statistical Analysis. Part I: Spatially Homogeneous and Isotropic Gaussian Covariances. Monthly Weather Review, 131, 1524-1535.
  • James Purser, Wan-Shu Wu, David F. Parrish, and Nigel M. Roberts, 2003: Numerical Aspects of the Application of Recursive Filters to Variational Statistical Analysis. Part II: Spatially Inhomogeneous and Anisotropic General Covariances. Monthly Weather Review, 131, 1536-1548.
  • David F. Parrish and John C. Derber, 1992: The National Meteorological Center's Spectral Statistical-Interpolation Analysis System. Monthly Weather Review, 120, 1747-1763.
  • James Pursur, 2005: Recursive Filter Basics. 1st GSI User Orientation. 4th-5th January 2005. Camp Springs, MD
  • Russ Treadon, 2005: GSI Compilation, Coding, and Updates. 1st GSI User Orientation. 4th-5th January 2005. Camp Springs, MD
  • John Derber, 2005: minimization and Preconditioning. 1st GSI User Orientation. 4th-5th January 2005. Camp Springs, MD
  • Wang, X., D. Parrish, D. Kleist and J. S. Whitaker, 2013: GSI 3DVar-based Ensemble-Variational Hybrid Data Assimilation for NCEP Global Forecast System: Single Resolution Experiments. Mon. Wea. Rev., in press
  • Lee, S.-J., D. F. Parrish, W.-S. Wu, S.-Y. Park, S. J. Greybush, W.-J. Lee, and S. J. Lord, 2011: Effects of 2-m Air Temperature Assimilation and a New Near-Surface Observation Operator on the NCEP Gridpoint Statistical-Interpolation System. Asia-Pacific Journal of Atmospheric Science, 47, 353-376
Some of the GSI related publications can be found at: Link