05.12.2016: FB1-Seminar

11:00 h, Hörsaal, Düsternbrooker Weg 20

Abstract:

Atmospheric aerosol is highly diverse in space and time - not just for its amount but also for its size and composition. Yet this variability needs to be properly represented - also in context of the atmospheric environment (e.g. clouds, solar insolation, surface properties) - to properly estimate aerosol effects on radiative transfer and (with assumptions to pre-industrial conditions) the effect of anthropogenic aerosol on climate (change). A helpful element to capture the regional and seasonal variability (at least for aerosol amount) is (passive) satellite remote sensing. However, retrieval models, which interpret solar reflectance data into aerosol amount make many assumptions (to radiative background and to aerosol composition) and are often highly uncertain. Thus, ground monitoring of direct solar attenuation data (at cloud-free conditions) with sun-photometry are a welcome constrain, not just to satellite remote sensing but also to “bottom-up” (from emissions via processing to aerosol amount) simulations with global models. Unfortunately, sun-photometer data over oceans are sparse and opportunities are sought, to collect reference data during ocean voyages to add to a NASA-maintained reference data pools. In this presentation an application of these ground-reference data is applied in a “bottom-down” (from optical measurements) approach to estimate aerosol radiative effects and climate effect of anthropogenic - also as it developed from pre-industrial times.

<link service veranstaltungen wiss-veranstaltungen fb1-seminar internen link im aktuellen>Liste aller FB1 Seminarvorträge