Berlin 2014 – wissenschaftliches Programm
UP 5.2: Vortrag
Mittwoch, 19. März 2014, 10:00–10:15, MAG 100
The seasonal cycle of total column CO2 and CH4 in the high Arctic — •Matthias Buschmann, Nicholas Deutscher, Mathias Palm, Thorsten Warneke, Tine Weinzierl, and Justus Notholt — Institut für Umweltphysik, Universität Bremen, Bremen, Deutschland
The measurement of long-lived greenhouse gases, like CO2 and CH4, and identification of their sources and sinks is very important in the context of climate change research. Networks like the TCCON (Total Carbon Column Observing Network) continuously monitor a variety of trace gases in the atmosphere by employing ground based Fourier Transform InfraRed (FTIR) spectroscopy on solar radiation in the near infrared (NIR). However, at high latitude sites (like Ny Ålesund, Spitzbergen at 79∘ N), there is no direct sunlight in winter due to the polar night and the moon is the next best source of NIR radiation. In this talk we will present the first record of the seasonal cycle of carbon dioxide and methane derived from solar absorption spectra in summer and lunar absorption spectra in the winter.