Characteristics of Volcanic Stratospheric Aerosol Layer Observed by CALIOP and Ground Based Lidar at Equatorial Atmosphere Radar Site

Stratospheric aerosol measurements by dual polarisation lidar

We present measurements of stratospheric aerosol made at Aberystwyth, UK (52.4 N, 4.06 W) during periods of background aerosol conditions. The measurements were made with a lidar system based on a 532 nm laser and two polarisation channels in the receiver. When stratospheric aerosol amounts are very small, as at present, this method is, potentially, free of a number of systematic errors that be...

Tropical stratospheric aerosol layer from CALIPSO lidar observations

Determining the contribution of volcanic ash and boundary layer aerosol in backscatter lidar returns: A three‐component atmosphere approach

[1] A solution of the lidar equation is discussed, that permits combining backscatter and depolarization measurements to quantitatively distinguish two different aerosol types with different depolarization properties. The method has been successfully applied to simultaneous observations of volcanic ash and boundary layer aerosol obtained in Exeter, United Kingdom, on 16 and 18 April 2010, permi...

Validation of CALIOP aerosol and cloud layer structures

New ground-based lidar enables volcanic CO2 flux measurements

There have been substantial advances in the ability to monitor the activity of hazardous volcanoes in recent decades. However, obtaining early warning of eruptions remains challenging, because the patterns and consequences of volcanic unrests are both complex and nonlinear. Measuring volcanic gases has long been a key aspect of volcano monitoring since these mobile fluids should reach the surfa...