1. Karlsruhe Institute of Technology (KIT), Institute
for Applied Geosciences (AGW), Kaiserstr. 12, 76131 Karlsruhe, Germany
2. ETH Zurich, Department of Earth Sciences, Sonneggstr. 5, 8092 Zurich, Switzerland
3. Karlsruhe Institute of Technology (KIT), Institute
of Meteorology and Climate Research—Atmospheric Trace Gases
and Remote Sensing (IMK-ASF), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany