The dataset consists of two ship-borne aerosols scattering ratio lidar datasets in the early stages of the stratospheric aerosols produced by the June 1991 Mount Pinatubo eruption. The Russian vessel Prof. Zubov ship Atlantic transect from Europe to the Caribbean from July to September 1991 and Prof. Vize ship transect from Europe to south of the Equator between January and February 1992. All the 48 reported measurements at the Prof. Zubov were rescued but only 11 of the 20 measurements conducted by Prof. Vize were found. We used the same algorithms and parameters appearing in the only two articles published with this datasets to reproduce the aerosols extinction values those papers reported and showed in its figures. Following this criteria the CIRA-86 atmosphere was used to derive the molecular backscattering, vertical and temporal constant values of the aerosols backscattering to extinction ratio and for the correction factor of the aerosols backscattering wavelength dependence. The dataset consists of profiles of lidar aerosols backscattering to extinction profiles ratios and the derived aerosols backscattering and aerosols extinction profiles. Each profile contains information about the latitude, longitude, date and time it was measured.

Juan Carlos Antuña-Marrero acknowledges the support by the Copernicus Atmospheric Monitoring Service (CAMS), one of six services that form Copernicus, the European Union's Earth observation programme, for his 1-month visit in March 2019 to the School of Earth and Environment, University of Leeds, Leeds, UK. We also acknowledge funding from the National Centre for Atmospheric Science for Dr. Graham Mann via the volcanic workpackage the NERC Multi-Centre Long-Term Science Programme on the North Atlantic climate system (ACSIS).