Jena 2013 – wissenschaftliches Programm

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UP: Fachverband Umweltphysik

UP 14: Atmosphäre - Spurengase, Aerosole und Labormessungen

UP 14.6: Vortrag

Donnerstag, 28. Februar 2013, 12:00–12:15, HS 5

Ground-based total column measurements of greenhouse gases on Ascension Island — •Sabrina Niebling and Dietrich Feist — Max Planck Institute for Biogeochemistry

Anthropogenic emissions of greenhouse gases like CO₂ and CH₄ are important drivers of changes in radiative forcing and therefore climate changes. However, there remain still large uncertainties concerning the estimates of source and sink distributions of these gases to and from the atmosphere and more measurements are needed to adequately assess the problem. In 2004, the Total Carbon Column Observing Network (TCCON) was formed which consists of ground-based Fourier Transform Spectrometer (FTS) systems all around the world that provide high-resolution near-infrared spectral data . From these spectra, it is possible to retrieve total columns of CO₂, CH₄, CO and several other trace gases with very high precision. As part of the TCCON network we have deployed a mobile FTS system on Ascension Island (7.94^∘ S, 14.37^∘ W) in May 2012. We present first data from this very remote station and show a comparison of the measured ground-based total columns to other data sets such as ground-based in situ measurements and total column measurements retrieved from glint data acquired on board GOSAT.