Table 1: Comparison between the advantages and drawbacks of the three approaches to determinate the PBL height.

AdvantagesDisadvantages

Lidar-based gradient methodHigh vertical resolution Continuous measurements Opportunity to observe aerosol layersLack of overlap at low altitudes sets a lower limit for PBL height determination
Needs well-mixed aerosol. Problems of interpretation with advected layers
Radiosonde-based LR and RB methodsLarge dataset over the world since radiosondes are routinely operated Can be used also in adverse meteorological conditionsDetermination of the PBL height only in coincidences of the balloon launch
In case of stable PBL methods based on potential temperature are not applicable (or reliable)
Batchvarova and Gryning modelProvides continuous estimate of the PBL height
Employs only ground based measurements
Good results only under convective regimes and clear sky conditions
Estimate of initialization values and uncertainties on estimates of parameters
Turbulent flux measurements are required
Many approximations in the physics of PBL processes make the estimate subject to large uncertainties