The GOZCARDS Source Data for Water Vapor 1 month L3 10 degree Zonal Averages on a Vertical Pressure Grid product (GozSmlpH2O) contains zonal means and related information (standard deviation, minimum/maximum value, etc.), calculated from original Level 2 satellite instruments and products. The source H2O data are from the following satellite instruments: HALOE (v19; 1991-2005), UARS MLS (v5; 1991-1997), ACE-FTS (v2.2; 2004-onward), Aura MLS (v2.2; 2004 onward). The vertical pressure range for H2O is from 147 to 0.01 hPa. The source data are used to create a merged product contained in a separate data product with the short name GozMmlpH2O. The GozSmlpH2O source data are distributed in netCDF4 format.