Heidelberg 2015 – wissenschaftliches Programm

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UP: Fachverband Umweltphysik

UP 18: Meßtechnik (verschoben von Donnerstag 17:30)

UP 18.1: Vortrag

Freitag, 27. März 2015, 14:00–14:15, G/gHS

Retrieval of Vertical Profiles of Trace Gases, Aerosols and Clouds from Multi-Axis DOAS measurements — •Udo Frieß and Ulrich Platt — Institut für Umweltphysik, Universität Heidelberg

During recent years, Multi-Axis Differential Optical Absorption Spectroscopy (MAX-DOAS) has found a growing number of applications for the retrieval of vertical profile information of atmospheric constituents. MAX-DOAS instruments measure the differential slant column density of trace gases along several lines of sight between the zenith and the horizon using spectroscopic techniques. From these measurements, vertical profiles of trace gases, but also aerosols and clouds in the planetary boundary layer can be retrieved. The conversion of dSCDs to vertical profiles of aerosols and trace gases is a complex problem, which can be solved using appropriate retrieval algorithms in conjunction with radiative transfer models.

Here we present results obtained by the Heidelberg profile retrieval algorithm (HEIPRO) for the retrieval of trace gas and aerosol vertical profiles from MAX-DOAS measurements. The versatility of the algorithm will be demonstrated on the basis of ground-based and airborne data from several campaigns reaching from mid-latitudes to Polar Regions, and the vertical sensitivity and information content will be discussed. The vertical profiles retrieved from MAX-DOAS will be compared to co-located aerosol and trace gas instrumentation, such as LIDAR, sun photometer, nephelometer and in situ trace gas measurements.