diff --git a/definitions/grib2/chemFormula.def b/definitions/grib2/chemFormula.def
index 68db7dcf7..0e99769c8 100644
--- a/definitions/grib2/chemFormula.def
+++ b/definitions/grib2/chemFormula.def
@@ -654,3 +654,39 @@
 'aer_total' = {
 	constituentType = 62000 ;
 	}
+#Dust aerosol (0.9 - 2.5 um)
+'aer_dust_09_2p5' = {
+        scaleFactorOfSecondSize = 7 ;
+        scaledValueOfFirstSize = 9 ;
+        scaleFactorOfFirstSize = 7 ;
+        typeOfSizeInterval = 7 ;
+        scaledValueOfSecondSize = 25 ;
+        constituentType = 62001 ;
+        }
+#Dust aerosol (2.5 - 5.0 um)
+'aer_dust_2p5_5' = {
+        scaleFactorOfSecondSize = 6 ;
+        scaledValueOfFirstSize = 25 ;
+        scaleFactorOfFirstSize = 7 ;
+        typeOfSizeInterval = 7 ;
+        scaledValueOfSecondSize = 5 ;
+        constituentType = 62001 ;
+        }
+#Dust aerosol (5.0 - 10.0 um)
+'aer_dust_5_10' = {
+        scaleFactorOfSecondSize = 5 ;
+        scaledValueOfFirstSize = 5 ;
+        scaleFactorOfFirstSize = 6 ;
+        typeOfSizeInterval = 7 ;
+        scaledValueOfSecondSize = 1 ;
+        constituentType = 62001 ;
+        }
+#Dust aerosol (10.0 - 20.0 um)
+'aer_dust_10_20' = {
+        scaleFactorOfSecondSize = 5 ;
+        scaledValueOfFirstSize = 1 ;
+        scaleFactorOfFirstSize = 5 ;
+        typeOfSizeInterval = 7 ;
+        scaledValueOfSecondSize = 2 ;
+        constituentType = 62001 ;
+        }
diff --git a/definitions/grib2/chemId.def b/definitions/grib2/chemId.def
index fc3b80e6e..a6666aaa0 100644
--- a/definitions/grib2/chemId.def
+++ b/definitions/grib2/chemId.def
@@ -654,3 +654,39 @@
 '922' = {
 	constituentType = 62000 ;
 	}
+#Dust aerosol (0.9 - 2.5 um)
+'925' = {
+        scaleFactorOfSecondSize = 7 ;
+        scaledValueOfFirstSize = 9 ;
+        scaleFactorOfFirstSize = 7 ;
+        typeOfSizeInterval = 7 ;
+        scaledValueOfSecondSize = 25 ;
+        constituentType = 62001 ;
+        }
+#Dust aerosol (2.5 - 5.0 um)
+'926' = {
+        scaleFactorOfSecondSize = 6 ;
+        scaledValueOfFirstSize = 25 ;
+        scaleFactorOfFirstSize = 7 ;
+        typeOfSizeInterval = 7 ;
+        scaledValueOfSecondSize = 5 ;
+        constituentType = 62001 ;
+        }
+#Dust aerosol (5.0 - 10.0 um)
+'927' = {
+        scaleFactorOfSecondSize = 5 ;
+        scaledValueOfFirstSize = 5 ;
+        scaleFactorOfFirstSize = 6 ;
+        typeOfSizeInterval = 7 ;
+        scaledValueOfSecondSize = 1 ;
+        constituentType = 62001 ;
+        }
+#Dust aerosol (10.0 - 20.0 um)
+'928' = {
+        scaleFactorOfSecondSize = 5 ;
+        scaledValueOfFirstSize = 1 ;
+        scaleFactorOfFirstSize = 5 ;
+        typeOfSizeInterval = 7 ;
+        scaledValueOfSecondSize = 2 ;
+        constituentType = 62001 ;
+        }
diff --git a/definitions/grib2/chemName.def b/definitions/grib2/chemName.def
index 2c8b54419..b8ef4c8a2 100644
--- a/definitions/grib2/chemName.def
+++ b/definitions/grib2/chemName.def
@@ -654,3 +654,39 @@
 'Total aerosol' = {
 	constituentType = 62000 ;
 	}
+#Dust aerosol (0.9 - 2.5 um)
+'Dust aerosol (0.9 - 2.5 um)' = {
+        scaleFactorOfSecondSize = 7 ;
+        scaledValueOfFirstSize = 9 ;
+        scaleFactorOfFirstSize = 7 ;
+        typeOfSizeInterval = 7 ;
+        scaledValueOfSecondSize = 25 ;
+        constituentType = 62001 ;
+        }
+#Dust aerosol (2.5 - 5.0 um)
+'Dust aerosol (2.5 - 5.0 um)' = {
+        scaleFactorOfSecondSize = 6 ;
+        scaledValueOfFirstSize = 25 ;
+        scaleFactorOfFirstSize = 7 ;
+        typeOfSizeInterval = 7 ;
+        scaledValueOfSecondSize = 5 ;
+        constituentType = 62001 ;
+        }
+#Dust aerosol (5.0 - 10.0 um)
+'Dust aerosol (5.0 - 10.0 um)' = {
+        scaleFactorOfSecondSize = 5 ;
+        scaledValueOfFirstSize = 5 ;
+        scaleFactorOfFirstSize = 6 ;
+        typeOfSizeInterval = 7 ;
+        scaledValueOfSecondSize = 1 ;
+        constituentType = 62001 ;
+        }
+#Dust aerosol (10.0 - 20.0 um)
+'Dust aerosol (10.0 - 20.0 um)' = {
+        scaleFactorOfSecondSize = 5 ;
+        scaledValueOfFirstSize = 1 ;
+        scaleFactorOfFirstSize = 5 ;
+        typeOfSizeInterval = 7 ;
+        scaledValueOfSecondSize = 2 ;
+        constituentType = 62001 ;
+        }
diff --git a/definitions/grib2/chemShortName.def b/definitions/grib2/chemShortName.def
index 68db7dcf7..0e99769c8 100644
--- a/definitions/grib2/chemShortName.def
+++ b/definitions/grib2/chemShortName.def
@@ -654,3 +654,39 @@
 'aer_total' = {
 	constituentType = 62000 ;
 	}
+#Dust aerosol (0.9 - 2.5 um)
+'aer_dust_09_2p5' = {
+        scaleFactorOfSecondSize = 7 ;
+        scaledValueOfFirstSize = 9 ;
+        scaleFactorOfFirstSize = 7 ;
+        typeOfSizeInterval = 7 ;
+        scaledValueOfSecondSize = 25 ;
+        constituentType = 62001 ;
+        }
+#Dust aerosol (2.5 - 5.0 um)
+'aer_dust_2p5_5' = {
+        scaleFactorOfSecondSize = 6 ;
+        scaledValueOfFirstSize = 25 ;
+        scaleFactorOfFirstSize = 7 ;
+        typeOfSizeInterval = 7 ;
+        scaledValueOfSecondSize = 5 ;
+        constituentType = 62001 ;
+        }
+#Dust aerosol (5.0 - 10.0 um)
+'aer_dust_5_10' = {
+        scaleFactorOfSecondSize = 5 ;
+        scaledValueOfFirstSize = 5 ;
+        scaleFactorOfFirstSize = 6 ;
+        typeOfSizeInterval = 7 ;
+        scaledValueOfSecondSize = 1 ;
+        constituentType = 62001 ;
+        }
+#Dust aerosol (10.0 - 20.0 um)
+'aer_dust_10_20' = {
+        scaleFactorOfSecondSize = 5 ;
+        scaledValueOfFirstSize = 1 ;
+        scaleFactorOfFirstSize = 5 ;
+        typeOfSizeInterval = 7 ;
+        scaledValueOfSecondSize = 2 ;
+        constituentType = 62001 ;
+        }