Bremen 2017 – wissenschaftliches Programm
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UP: Fachverband Umweltphysik
UP 6: Methoden - Fernerkundung
UP 6.6: Vortrag
Mittwoch, 15. März 2017, 10:00–10:15, GW2 B3009
Global phytoplankton functional type products derived from the Ozone Monitoring Instrument using PhytoDOAS — •Julia Oelker1, Tilman Dinter2, Vladimir R. Rozanov1, Andreas Richter1, John P. Burrows1, and Astrid Bracher2 — 1Institut für Umweltphysik, Universität Bremen, 28359 Bremen — 2Alfred-Wegener-Institut für Polar- und Meeresforschung, 27568 Bremerhaven
Ocean color sensors measure backscattered radiance in up to eight wavelength bands from which phytoplankton chlorophyll-a concentrations are derived. Various algorithms exist to additionally extract information on phytoplankton community from such multi-spectral sensors, e.g. size classes or phytoplankton functional types (PFT), however, it is generally agreed that hyper-spectral sensors, due to increased spectral information, are more suitable for phytoplankton community studies. So far, no ocean color sensors with hyper-spectral resolution are available. It has been shown though for the hyper-spectral sensor SCIAMACHY, designed for the retrieval of atmospheric trace gases, that retrieval of oceanic paramaters is possible. Chlorophyll-a concentrations of up to four PFTs have been retrieved simultaneously from SCIAMACHY data using PhytoDOAS a method based on Differential Optical Absorption Spectroscopy (DOAS). Here we will present global PFT products from the still-operating Ozone Monitoring Instrument (OMI) in comparison to SCIAMACHY global PFT products. We will highlight the improved spatial resolution and coverage of the PFT data from OMI and give an outlook for upcoming Sentinel missions.