Allow year offset for LPJ-GUESS directories, used in GGCMI

src/ac/ed/lurg/ModelConfig.java

@@ -376,6 +376,7 @@ public class ModelConfig {
 
 	public static final double PASTURE_MAX_IRRIGATION_RATE = getDoubleProperty("DEFAULT_MAX_IRRIGATION_RATE", 50.0); // shouldn't need this but some areas crops don't have a value, but was causing them to be selected
 	public static final int LPJG_TIMESTEP_SIZE = getIntProperty("LPJG_TIMESTEP_SIZE", 5);
+	public static final int LPJ_YEAR_OFFSET = getIntProperty("LPJ_YEAR_OFFSET", 0);;
 
 	public static final int NUM_YIELD_CLUSTERS = getIntProperty("NUM_YIELD_CLUSTERS", 8000);
 	public static final long RANDOM_SEED = getIntProperty("RANDOM_SEED", 1974329);  // any number will do

src/ac/ed/lurg/Timestep.java

@@ -98,6 +98,7 @@ public class Timestep {
 	}
 	
 	public static String getYearSubDir(String rootDir, int endYear) {
+		endYear += ModelConfig.LPJ_YEAR_OFFSET;
 		return rootDir + File.separator + (endYear-ModelConfig.LPJG_TIMESTEP_SIZE+1) + "-" + endYear;
 	}
 }