OASIS-CANADA-OOTI TARA: Measurements of ozone during the TARA drift over the Arctic Ocean
Ship: CCGS Amundsen CA
Principal Investigator: Bottenheim, Jan
Start Date: 01-10-2006
End Date: 03-11-2007
Citation: Bottenheim, J., S. Netcheva, S. Morin, and S.V. Nghiem, Ozone in the boundary layer air over the Arctic Ocean: Measurements during the TARA expedition, Atmos. Chem. Phys., 9, 4545-4557, 2009. Jacobi, H.-W., S. Morin, and J. Bottenheim, Observation of widespread depletion of ozone in the springtime boundary layer of the Central Arctic linked to mesoscale synoptic conditions, J. Geophys. Res., 115, D17302, doi:10.1029/2010JD013940, 2010.
Abstract: A full year of measurements of surface ozone over the Arctic Ocean, far removed from land, is presented (72 to 89 degrees North latitude). The data were obtained during the drift of the French schooner TARA between September 2006 and November 2007, while frozen in the Arctic Ocean. Ozone data were collected with a TEI-049 ozone monitor in a fully automated manner during the TARA drift at 10 seconds intervals. Five-minute averages of quality-controlled ambient data are archived in the Polar Data Catalogue. Data that have possibly been influenced by the ship's generator and instrument instability are filtered out. Date and time stamp (UTC) are included with averaged ozone values archived in one file. GPS location during the drift was recorded by the Damocles project and is reported at the following location: http://www.damocles-eu.org/research/TARA_ARCTIC_2007-2008_The_Great_Arctic_drift_54.shtml. A file with GPS coordinated from ship's log is provided in one data file. These first year-long measurements of ozone concentration in the surface air over the frozen Arctic Ocean, hundreds of kilometres from land, were obtained by an instrument onboard the French schooner TARA drifting with the ice for 16 months. Collected data confirmed the occurrence of long periods with substantial to complete destruction of ozone in the spring air after the Polar sunrise, which was predicted by satellite measurements of bromine monoxide over the Arctic. The record reflects the seasonal cycle of ozone measured over the Arctic Ocean.