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GAW Guidelines for Precipitation Chemistry Measurements

Manual for the GAW Precipitation Chemistry Programme (WMO-GAW Report No. 160). Published in November 2004

Note: These sections of the Manual published in November 2004 have been updated: 1 - Introduction, 30 August 2018; 2 - Siting, 30 June 2021; 3 - Field Protocols, 20 July 2021; 4 - Laboratory Operations, 19 June 2021; Appendix A, 10 July 2020; Appendix B, 29 June 2021; Appendix C, 31 March 2018; Appendix D, 18 June 2021. In addition, Troubleshooting Guides for analytical measurements are now available.

1 - Introduction (30 August 2018) 2 - Siting (30 June 2021) 3 - Field Protocols (20 July 2021) 4 - Laboratory Operations (19 June 2021) 5 - Data Management (November 2021) 6 - Quality Assurance & Quality Control (6 August 2021) Appendix A. Data Quality Objectives & Assessment (10 July 2020) Appendix B. Site Description Forms (29 June 2021) Appendix C. Preparation of Quality Control Solutions (31 March 2018) Appendix D. Resources for Consensus Standards and Certified Reference Materials (18 June 2021) Appendix H. Non-Sea Salt Sulfate Correction (November 2004) Annual CO2 Data

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