The GOZCARDS Merged Data for Nitric Acid 1 month L3 10 degree Zonal Averages on a Vertical Pressure Grid product (GozMmlpHNO3) contains zonal means and related information (standard deviation, minimum/maximum value, etc.), calculated as a result of a merging process that ties together the source datasets, after bias removal and averaging. The merged HNO3 data are from the following satellite instruments: UARS MLS (v6; 1991 - 1997), ACE-FTS (v2.2u; 2004 - onward), and Aura MLS (v3.3; 2004 - onward). The vertical pressure range for HNO3 is from 147 to 1 hPa. The input source data used to create this merged product are contained in a separate data product with the short name GozSmlpHNO3. The GozMmlpHNO3 merged data are distributed in netCDF4 format.