Aerosol measurements with a shipborne Sun-sky-lunar photometer and collocated multiwavelength Raman polarization lidar over the Atlantic Ocean

Abstract

A shipborne Sun-sky-lunar photometer of type CE318-T was tested during two trans-Atlantic cruises aboard the German research vessel Polarstern from 54<span classCombining double low line"inline-formula">ĝ N to 54<span classCombining double low line"inline-formula">ĝ S in May/June and December 2018. The continuous observations of the motion-stabilized shipborne CE318-T enabled the first-time observation of a full diurnal cycle of aerosol optical depth (AOD) and column-mean Ångström coefficient of a mixed dust-smoke episode. The latitudinal distribution of the AOD from the shipborne CE318-T, Raman lidar and MICROTOPS II shows the same trend with highest values in the dust belt from 0 to 20<span classCombining double low line"inline-formula">ĝ N and overall low values in the Southern Hemisphere. The linear-regression coefficients of determination between MICROTOPS II and the CE318-T were 0.988, 0.987, 0.994 and 0.994 for AODs at 380, 440, 500 and 870 nm and 0.896 for the Ångström exponent at 440-870 nm. The root-mean-squared differences of AOD at 380, 440, 500 and 870 nm were 0.015, 0.013, 0.010 and 0.009, respectively.

Description
Keywords
aerosol, Doppler lidar, lidar, optical depth, photometer, research vessel, Southern Hemisphere, spectrophotometry, African Margin [Atlantic Ocean], Atlantic Ocean
Citation
Yin, Z., Ansmann, A., Baars, H., Seifert, P., Engelmann, R., Radenz, M., et al. (2019). Aerosol measurements with a shipborne Sun-sky-lunar photometer and collocated multiwavelength Raman polarization lidar over the Atlantic Ocean. 12(10). https://doi.org//10.5194/amt-12-5685-2019
License
CC BY 4.0 Unported