These grids are based on version 1.1 of the final SRES emissions scenarios. The version 1.1. emissions are not completely identical to those in Appendix VII of the SRES report as published by Cambridge University Press (2000). In a small number of cases slight corrections were made after the publication of the document to prevent negative emissions which occurred as a result of the standardization procedure. Grids have been produced for all six illustrative scenarios. These are: The four marker scenarios A1B-AIM A2-ASF B1-IMAGE B2-MESSAGE plus two additional illustrative scenarios from the A1 scenario family: A1G-MiniCAM (a.k.a. A1FI) A1T-MESSAGE Grids are produced for each year from 1990 to 2100 (emissions in 1990 and 2000 are the same in all scenarios). Units are as specified in each file. Emissions are in three columns that contain lon, lat, and value. The file Reactive Gases.csv contains a list of regional values for each gas and time period. Please contact Steve Smith at ssmith@pnl.gov with technical questions about the gridded data.