Multi-year ground-based multi-wavelength Raman lidar aerosol dataset over the interior Tibetan Plateau (Yangbajing, 4284 m a.s.l.; 2021-2024)

Quality-controlled, multi-year aerosol vertical profiles from the ground-based multi-wavelength Raman/elastic/depolarisation lidar at the Yangbajing Whole-Atmosphere Observatory (30.102 N, 90.522 E, 4284 m a.s.l.), interior Tibetan Plateau (2021-2024). Products: particle backscatter at 355 and 532 nm (elastic Fernald, S=50 sr; validated by the nitrogen-Raman lidar ratio and CALIPSO), a colour-ratio 1064 nm backscatter (non-independent), particle extinction at 355 and 532 nm (nitrogen-Raman), the 532 nm volume depolarisation ratio, the water-vapour mixing ratio, column AOD (night and day), per-bin photon-noise uncertainties, cloud flags, and the geometric overlap functions. One CF-1.8 NetCDF-4 file (36 variables; night=437, altitude=157 on a 75 m grid from 0.30-12 km a.g.l., day=279). The elastic backscatter is corrected for the geometric overlap (Raman method; full overlap 0.45 km at 532 nm, 0.68 km at 355 nm), archived with the overlap functions as ancillary variables. Backscatter and extinction are reported only where significantly detected; below-detection bins are _FillValue. Third-party datasets (CALIPSO, AERONET) are not included. Data descriptor submitted to Earth System Science Data (ESSD), 2026. See README.txt for full variable and provenance notes.