Bremen 2017 – wissenschaftliches Programm

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UP: Fachverband Umweltphysik

UP 14: Atmosphäre - Aerosole/Wolken

UP 14.1: Hauptvortrag

Donnerstag, 16. März 2017, 14:30–15:00, GW2 B3009

Cloud top pressure retrieval from MERIS and OLCI: Global assessment — •Jürgen Fischer, Ulrich Küster, Cintia Carbajal, and Rene Preusker — Freie Universität Berlin

Cloud top pressure (CTP) retrievals from measurements within the O2 A-band of MERIS (Medium Resolution Imaging Spectrometer on board ENVISAT) have been analysed with respect to a decadal variability on a global scale. Clouds are subject of climate studies, because they have a large impact on the earth radiation budget and it is very likely that clouds respond on climate change. Due to the high variability of clouds no significant trend in cloud cover and cloud properties has been identified so far. Nevertheless, recent climate studies indicate that the vertical structure of clouds and zonal shifts of clouds might be caused by climate change. Since the MERIS and OLCI measurements within the O2 A-band are sensitive to the vertical cloud profile, we assessed the global MERIS CTP product during its 10 years of operation to detect regional cloud anomalies. We also compared the single MERIS CTP product with the synergistic MERIS and AATSR CTP product, which is less sensitive to the vertical cloud profile.